Chemistry – An Asian Journal

Cover image for Vol. 5 Issue 3

Special Issue: In dedication to the 150th anniversary of Japan–UK diplomatic relations

March 1, 2010

Volume 5, Issue 3

Pages 365–639

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Reviews
    7. Communications
    8. Full Papers
    9. Preview
    1. Cover Picture: Diol Appended Quenchers for Fluorescein Boronic Acid (Chem. Asian J. 3/2010) (page 365)

      Souad A. Elfeky, Stephen E. Flower, Naoko Masumoto, François D'Hooge, Ludivine Labarthe, Wenbo Chen, Christophe Len, Tony D. James and John S. Fossey

      Version of Record online: 22 FEB 2010 | DOI: 10.1002/asia.201090004

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      Last year saw the 150th anniversary of Japan–UK diplomatic relations. To commemorate this occasion, this special issue featuring top contributions from around the world is dedicated to this event. This issue features over 30 papers, five of which are Focus Reviews on topics ranging from catalysis to enzyme inhibition. As the cover picture provided by the group of Dr. John S. Fossey shows, just as boronic acids and diols are joined together as two halves of a FRET system via the formed boronic ester link, diplomatic relations have served to link together these two countries on two halves of the world, both politically and scientifically. Image reproduced by permission of Lotfallah Benassarou, www. elbidesign.com.

  2. Editorial

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Reviews
    7. Communications
    8. Full Papers
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    1. You have free access to this content
      Building Bridges (page 368)

      John S. Fossey and Shū Kobayashi

      Version of Record online: 22 FEB 2010 | DOI: 10.1002/asia.201000118

  3. Graphical Abstract

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Reviews
    7. Communications
    8. Full Papers
    9. Preview
  4. News

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Reviews
    7. Communications
    8. Full Papers
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  5. Focus Reviews

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Reviews
    7. Communications
    8. Full Papers
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    1. Rhodium Catalysis

      Alternatives to Organoboron Reagents in Rhodium-Catalyzed Conjugate Additions (pages 386–396)

      Jonathan D. Hargrave, Joseph C. Allen and Christopher G. Frost

      Version of Record online: 5 JAN 2010 | DOI: 10.1002/asia.200900512

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      Alternative organometallic donors to organoboron reagents can offer significant advantages in terms of intrinsic reactivity and selectivity, resulting in new transformations for organic synthesis based on rhodium-catalyzed conjugate addition. This Focus Review explores emerging applications in this rapidly expanding area of catalysis.

    2. Phosphines

      1-Alkynylphosphines and Their Derivatives as Key Starting Materials in Creating New Phosphines (pages 398–409)

      Azusa Kondoh, Hideki Yorimitsu and Koichiro Oshima

      Version of Record online: 8 JAN 2010 | DOI: 10.1002/asia.200900447

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      Transform to something new! This Focus Review summarizes transformations of 1-alkynylphosphines and their derivatives directed toward the synthesis of new phosphines. They have been emerging as useful precursors for the creation of new phosphines. Chemical modifications of the carbon–carbon triple bonds, including nucleophilic addition and cycloaddition, lead to a wide range of new useful phosphines that are otherwise difficult to synthesize.

    3. Binding Interactions

      Tautomycin’s Interactions with Protein Phosphatase 1 (pages 410–420)

      Magne O. Sydnes and Minoru Isobe

      Version of Record online: 10 DEC 2009 | DOI: 10.1002/asia.200900394

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      Recently the cocrystal structure of the natural product tautomycin (TTM) and protein phosphatase 1 (PP1) was reported. This Focus Review describes the work aimed at elucidating the binding interactions between TTM and PP1 prior to the X-ray cocrystal structure. Finally, the conclusions that prevailed prior the latter result are compared with the lessons learnt from the X-ray structure.

    4. Tandem Reactions

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      Recent Advances in Multicatalyst Promoted Asymmetric Tandem Reactions (pages 422–434)

      Jian Zhou

      Version of Record online: 5 JAN 2010 | DOI: 10.1002/asia.200900458

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      The more, the better! Multicatalyst promoted asymmetric tandem reactions have emerged as a powerful strategy to improve the synthetic efficiency. In this Focus Review, the current achievement of this promising field is discussed, including the advantages and difficulties of this research, and the strategies applied to address these problems.

    5. Cross-Coupling Reactions

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      Beyond Traditional Cross Couplings: The Scope of the Cross Dehydrogenative Coupling Reaction (pages 436–451)

      Caroline J. Scheuermann

      Version of Record online: 29 DEC 2009 | DOI: 10.1002/asia.200900487

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      CDCs in water! A seminal catalytic coupling termed the cross dehydrogenative coupling (CDC) for the direct formation of C[BOND]C and C–heteroatom bonds from unfunctionalized C[BOND]H and heteroatom[BOND]H bonds has been recently pioneered. This Focus Review summarizes some of the recent developments in this area.

  6. Communications

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Reviews
    7. Communications
    8. Full Papers
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    1. Silylzincation

      Regioselective Silylzincation of Phenylallene Derivatives (pages 452–455)

      Mitsuhiro Yonehara, Shinji Nakamura, Atsuya Muranaka and Masanobu Uchiyama

      Version of Record online: 21 JAN 2010 | DOI: 10.1002/asia.200900452

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      Pick your choice: This paper deals with our new approach for regio-controlled synthesis of exo/endo-vinylsilanes through silylzincation as a key reaction, using newly developed silylzinc reagents. In this system, by choosing appropriate zinc reagents, either exo-vinylsilane or endo-vinylsilane can be synthesized with good regioselectivity, using the same phenylallene substrates.

    2. Aerobic Oxidation

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      Bromine-Catalyzed Aerobic Oxidation of Alcohols (pages 456–460)

      Muhammet Uyanik, Ryota Fukatsu and Kazuaki Ishihara

      Version of Record online: 1 FEB 2010 | DOI: 10.1002/asia.200900609

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      Simple and clean: We have demonstrated that a simple and environmentally benign catalytic system HBr/NaNO2 is very effective for the selective oxidation of alcohols under balloon pressure of O2. Furthermore, the aerobic oxidation of alcohols has been achieved under balloon pressure of air rather that pure O2, with this HBr/NaNO2/HNO3 catalytic system.

    3. Cycloaddition

      An Unexpected Stereochemical Course of Dihydroimidazolium Ylide Cycloadditions (pages 461–465)

      Raymond C. F. Jones, Shabana Rafiq, Mark R. J. Elsegood, Vickie McKee and Martin J. Slater

      Version of Record online: 5 JAN 2010 | DOI: 10.1002/asia.200900547

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      Turning the tables: We have observed an unexpected switch of cycloaddition mode from endo to exo for sulfone-activated dipolarophiles with achiral dihydroimidazolium ylides to produce pyrrolo[1,2-a]imidazoles, that may be related to the extra steric requirement of tetrahedral sulfur activating groups. This did not occur for chiral dihydroimidazoles, with just one exception amongst the examples reported.

    4. Two-Photon Absorption

      Zwitterionic Ladder Bis(arylethenyl)benzenes with Large Two-Photon Absorption Cross Sections (pages 466–469)

      Aiko Fukazawa, Hiroshi Yamada, Yutaka Sasaki, Seiji Akiyama and Shigehiro Yamaguchi

      Version of Record online: 14 JAN 2010 | DOI: 10.1002/asia.200900517

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      A bridge worth crossing: Various phosphonium- and borate-bridged bis(arylethenyl)benzenes were synthesized. The large two-photon absorption (TPA) cross sections in these zwitterionic ladder π-electron systems revealed that the introduction of zwitterionic bridges in the coplanar π-conjugated framework is a powerful strategy for designing excellent TPA materials.

    5. Friedel–Crafts Alkylation

      Enantioselective Friedel–Crafts Alkylation of Indoles, Pyrroles, and Furans with Trifluoropyruvate Catalyzed by Chiral Phosphoric Acid (pages 470–472)

      Wataru Kashikura, Junji Itoh, Keiji Mori and Takahiko Akiyama

      Version of Record online: 15 FEB 2010 | DOI: 10.1002/asia.200900481

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      Indoles, and pyrroles, and furans, oh my! Chiral phosphoric acid catalyzed Friedel–Crafts alkylation of indoles with 3,3,3-trifluoropyruvate gave the corresponding adducts in excellent yields with high enantioselectivities. Electron-deficient indoles, in particular, exhibited excellent enantioselectivities.

    6. Homogeneous Catalysis

      Reductive Aldol and Mannich-Type Reactions of Azetidin-3-ones Promoted by Titanium Tetraiodide (pages 473–477)

      Shingo Hata, Daisuke Fukuda, Iwao Hachiya and Makoto Shimizu

      Version of Record online: 8 JAN 2010 | DOI: 10.1002/asia.200900457

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      A good promoter: A convenient method is described for the generation and reaction of the enolates of aminoacetone equivalents, which uses the reduction of azetidin-3-one with titanium tetraiodide and subsequent reactions with electrophiles. This methodology provides a straightforward access to 1,4-amino alcohols or diamines in a regioselective manner.

    7. Organocatalysis

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      Diastereo- and Enantioselective Reductive Aldol Reaction with Trichlorosilane Using Chiral Lewis Bases as Organocatalysts (pages 478–481)

      Masaharu Sugiura, Norimasa Sato, Yuko Sonoda, Shunsuke Kotani and Makoto Nakajima

      Version of Record online: 23 DEC 2009 | DOI: 10.1002/asia.200900450

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      Chiral Lewis base organocatalysts activate trichlorosilane to promote the tandem conjugate reduction/aldol reaction of α,β-unsaturated ketones with aldehydes to give optically active β-hydroxy ketones with good to high syn diastereo- and enantioselectivities. The reaction tolerates α,β-unsaturated aldehydes owing to the chemoselective conjugate reduction of enones in the presence of enals.

    8. Azaacenes

      Facile Synthesis of Highly Stable Tetraazaheptacene and Tetraazaoctacene Dyes (pages 482–485)

      Aurelio Mateo-Alonso, Niksa Kulisic, Giovanni Valenti, Massimo Marcaccio, Francesco Paolucci and Maurizio Prato

      Version of Record online: 8 DEC 2009 | DOI: 10.1002/asia.200900373

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      Stable, tunable, and colorful: The straightforward synthesis of highly stable π-extended tetraazaheptacene and tetraazaoctacene dyes is reported. The oxidation behavior of pyrene-based azaacenes and the third reduction wave for pyrene-based azaacenes with <11 linearly-fused rings is also observed for the first time.

    9. Oxidation

      Manganese-Catalyzed Direct Oxidation of Methyl Ethers to Ketones (pages 486–489)

      Shin Kamijo, Yuuki Amaoka and Masayuki Inoue

      Version of Record online: 10 NOV 2009 | DOI: 10.1002/asia.200900420

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      Take Me away! Direct C[BOND]H oxidation of alkyl ethers into ketones was achieved using 0.1 mol % of MnCl2 and 4,4′,4′′-tri(tert-butyl)-2,2′:6′,2′′-terpyridine (tBu-terpy) in the presence of mCPBA. Conversion of methyl ethers into ketones was particularly efficient and chemoselective. Electron-deficient oxygen functionalities survived under the reaction conditions. The present method broadens the utility of methyl ethers as stable protective groups for hydroxy functionalities and as precursors to carbonyl compounds.

    10. Hydroxymethylation

      Chiral Scandium-Catalyzed Enantioselective Hydroxymethylation of Ketones in Water (pages 490–492)

      Shū Kobayashi, Masaya Kokubo, Katsuaki Kawasumi and Takashi Nagano

      Version of Record online: 8 JAN 2010 | DOI: 10.1002/asia.200900442

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      Form with formalin: Scandium-catalyzed enantioselective hydroxymethylation of ketones has been developed using aqueous formaldehyde (formalin) in water. The addition of a catalytic amount of pyridine enables the use of ketones directly in asymmetric hydroxymethylation reactions.

    11. Mannich Reactions

      Chiral Zirconium Complex as Brønsted Base Catalyst in Asymmetric Direct-type Mannich Reactions (pages 493–495)

      Shū Kobayashi, Matthew M. Salter, Yumi Yamazaki and Yasuhiro Yamashita

      Version of Record online: 22 JAN 2010 | DOI: 10.1002/asia.200900524

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      Activating carbonyls: Asymmetric direct-type Mannich reaction using a chiral zirconium complex as Brønsted base is demonstrated. Zirconium complexes prepared from Zr(OtBu) and 3,3′-disubstituted BINOL are found to be good catalysts in the reactions of an iminoester with malonates, and high enantioselectivities are obtained.

    12. Solar Cells

      Cyclometallated Iridium Complexes as Sensitizers for Dye-Sensitized Solar Cells (pages 496–499)

      Etienne Baranoff, Jun-Ho Yum, Il Jung, Rosaria Vulcano, Michael Grätzel and Md. Khaja Nazeeruddin

      Version of Record online: 10 DEC 2009 | DOI: 10.1002/asia.200900429

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      A sensitive matter: New sensitizers based on cyclometallated iridium (III) complexes have been studied. Despite poor absorption properties, efficiencies up to 2.5 % were observed. It was seen that poor light-harvesting properties of the dyes are the main reasons for those efficiencies, which may be improved with better light-absorbing ligands. Electron-dynamic investigations show that very fast processes are taking place.

    13. Supramolecular Architectures

      Europium Directed Synthesis of Enantiomerically Pure Dimetallic Luminescent “Squeezed” Triple-Stranded Helicates; Solution Studies (pages 500–504)

      Christophe Lincheneau, Robert D. Peacock and Thorfinnur Gunnlaugsson

      Version of Record online: 8 FEB 2010 | DOI: 10.1002/asia.200900515

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      Triple-stranded helix: The formation of two novel chiral enantiomerially pure dimetallic (EuIII) triple stranded helicates (L3Eu2) was monitored in solution by observing the changes in the EuIII centered emission as well as in the absorption and the fluorescence spectra of ligands 3 and 4. Using CD and circular polarized luminescence (CPL), arising from the EuIII centers, the absolute configuration of these chiral supramolecular structures was assigned.

  7. Full Papers

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Reviews
    7. Communications
    8. Full Papers
    9. Preview
    1. Fluorophores

      Fluorescent Copper(II) Bis(thiosemicarbazonates): Synthesis, Structures, Electron Paramagnetic Resonance, Radiolabeling, In Vitro Cytotoxicity and Confocal Fluorescence Microscopy Studies (pages 506–519)

      Sofia I. Pascu, Philip A. Waghorn, Brett W. C. Kennedy, Rory L. Arrowsmith, Simon R. Bayly, Jonathan R. Dilworth, Martin Christlieb, Rex M. Tyrrell, Julia Zhong, Radoslaw M. Kowalczyk, David Collison, Parvinder K. Aley, Grant C. Churchill and Franklin I. Aigbirhio

      Version of Record online: 18 FEB 2010 | DOI: 10.1002/asia.200900446

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      Glowing copper: Fluorescent copper(II) bis(thiosemicarbazones) are synthesized and characterized in solution and in the solid state by X-ray crystallography and electron paramagnetic resonance techniques including spectroelectrochemistry. These are radiolabeled with 64Cu and the resultant serum protein binding radioassays show high kinetic stability.

    2. Polymorphism

      Conformational Polymorph of o-Aminoanilinium(dibenzo[18]crown-6) Supramolecules in [Ni(dmit)2] Salts (pages 520–529)

      Tomoyuki Akutagawa, Hiroyuki Koshinaka, Qiong Ye, Shin-ichiro Noro, Jun Kawamata, Hiroshi Yamaki and Takayoshi Nakamura

      Version of Record online: 22 DEC 2009 | DOI: 10.1002/asia.200900407

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      Salty supermolecules: Supramolecular (o-aminoanilinium)(dibenzo[18]crown-6) cations induced conformational polymorphs of monoclinic and tetragonal crystals of [Ni(dmit)2] (dmit=1,3-dithiol-2-thione-4,5-dithiolate) salts. The steric hindrance of the o-amino group in the supramolecule yielded a conformational polymorph with different dielectric and magnetic properties.

    3. Host–Guest Chemistry

      Binding Studies on CB[6] with a Series of 1-Alkyl-3-methylimidazolium Ionic Liquids in an Aqueous System (pages 530–537)

      Nan Zhao, Li Liu, Frank Biedermann and Oren A. Scherman

      Version of Record online: 8 FEB 2010 | DOI: 10.1002/asia.200900510

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      Guest accommodation! Reaction of the macrocyclic host molecule cucurbit[6]uril (CB[6]) with a series of 1-alkyl-3-methyl-imidazolium bromides ([Cnmim]Br) in neutral aqueous media, results in the formation of a series of host–guest systems. 1D, 2D NMR, and isothermal titration calorimetry (ITC) were employed to determine the binding characteristics of these host–guest interactions.

    4. Hydrogen Transfer

      1,4-Butanediol as a Reducing Agent in Transfer Hydrogenation Reactions (pages 538–542)

      Hannah C. Maytum, Javier Francos, David J. Whatrup and Jonathan M. J. Williams

      Version of Record online: 28 JAN 2010 | DOI: 10.1002/asia.200900527

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      No turning back: 1,4-Butanediol is able to deliver up to two equivalents of H2 in hydrogen-transfer reactions. An excess of 1,4-butanediol is not required because of the cyclization of the oxidized diol. Aldehydes, ketones, allylic alcohols, imines, and alkenes have all been reduced with ruthenium catalysts and 1,4-butanediol as the hydrogen donor.

    5. Hydrogen Bonding

      Anion Binding of N-(o-Methoxybenzamido)thioureas: Contribution of the Intramolecular Hydrogen Bond in the N-Benzamide Moiety (pages 543–549)

      Qian-Qian Jiang, Burenkhangai Darhkijav, Hao Liu, Fang Wang, Zhao Li and Yun-Bao Jiang

      Version of Record online: 1 FEB 2010 | DOI: 10.1002/asia.200900519

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      Anion affinity: N-(o-Methoxybenzamido)thiourea (2 X/2 Y) is found to show an enhanced anion affinity with binding constants over 107M−1 orders of magnitude for AcO and a redshifted absorption of the anion binding complex in acetonitrile, presumably owing to the o-MeO⋅⋅⋅HNC[DOUBLE BOND]O six-membered-ring intramolecular hydrogen bond in the N-benzamide moiety.

    6. Hydrogenation

      Diastereo- and Enantioselective Hydrogenation of a Challenging Enamide Derived from 4-Phenyl-2-tetralone: An Appealing Shortcut Towards Enantiopure cis-2-Aminotetraline Derivatives (pages 550–554)

      Simone Lucarini, Matteo Alessi, Annalida Bedini, Giorgia Giorgini, Giovanni Piersanti and Gilberto Spadoni

      Version of Record online: 27 JAN 2010 | DOI: 10.1002/asia.200900441

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      Enantio enamides: A catalytic diastereo- and first enantioselective hydrogenation study of the challenging trisubstituted endocyclic enamide N-(4-phenyl-3,4-dihydronaphthalen-2-yl)propionamide has been described. The Josiphos (R,S)-PPF-PtBu2-Rh-based catalyst almost overcomes the intrinsic substrate bias, and thus affords enantiomerically enriched 4-substituted-2-aminotetraline derivatives.

    7. Proton Transfer

      Anion–Anion Proton Transfer in Hydrogen Bonded Complexes (pages 555–561)

      Philip A. Gale, Jennifer R. Hiscock, Stephen J. Moore, Claudia Caltagirone, Michael B. Hursthouse and Mark E. Light

      Version of Record online: 3 SEP 2009 | DOI: 10.1002/asia.200900230

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      Shifting pKa: Amide functionalized diindolylureas donate six hydrogen bonds to a single dihydrogen phosphate anion resulting in an increase in acidity of the bound phosphate guest. This study provides a possible explanation for the apparent formation of complexes with unusual stoichiometries when investigating the binding of dihydrogenphosphate anion to hydrogen-bonding receptors.

    8. Asymmetric Alkylation

      Phase-Transfer-Catalyzed Asymmetric Alkylation of α-Benzoyloxy-β-keto Esters: Stereoselective Construction of Congested 2,3-Dihydroxycarboxylic Acid Esters (pages 562–570)

      Takuya Hashimoto, Keigo Sasaki, Kazuhiro Fukumoto, Yuichi Murase, Naoyuki Abe, Takashi Ooi and Keiji Maruoka

      Version of Record online: 10 DEC 2009 | DOI: 10.1002/asia.200900344

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      Highly enantioselective phase-transfer-catalyzed alkylation of α-benzoyloxy-β-keto esters is realized by the use of an N-spiro chiral quaternary ammonium salt. The synthetic utility of the alkylated compounds is highlighted by the diastereoselective functionalization of the products to give various congested 2,3-dihydroxycarboxylic acid esters.

    9. Lanthanide Complexes

      Luminescence Screening Assays for the Identification of Sensitizers for Lanthanides Based on the Controlled Formation of Ternary Lanthanide Complexes with DTPA–Bisamide Ligands (pages 571–580)

      Linette L. Ruston, Graeme M. Robertson and Zoe Pikramenou

      Version of Record online: 11 DEC 2009 | DOI: 10.1002/asia.200900367

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      Screening umbrellas: Sensitizers of europium emission have been screened in luminescence assay experiments to reveal recognition features in the formation of ternary complexes that lead to signal enhancement; bulky aliphatic substituents on a non-absorbing bisamide complex (NAL) or the sensitizer (S) play the role of an “umbrella” and protect the Eu emission signal from water molecules.

    10. Energy Transfer

      Diol Appended Quenchers for Fluorescein Boronic Acid (pages 581–588)

      Souad A. Elfeky, Stephen E. Flower, Naoko Masumoto, François D'Hooge, Ludivine Labarthe, Wenbo Chen, Christophe Len, Tony D. James and John S. Fossey

      Version of Record online: 1 FEB 2010 | DOI: 10.1002/asia.200900386

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      Linking it all together! A fluorescein boronic acid derivative was prepared in one step, its interaction with readily prepared bespoke diol appended quenchers was studied revealing enhanced FRET quenching owing to ester formation. The same fluorescent boronic acid also had its fluorescence efficiently quenched by nucleosides through boronate ester formation.

    11. Cyclizations

      Enantiospecific Stereodivergent Synthesis of trans- and cis-N(2),3-Dimethyl-4-phenyl-1,2,3,4-tetrahydroisoquinolines (pages 589–604)

      Steven J. Coote, Stephen G. Davies, Ai M. Fletcher, Paul M. Roberts and James E. Thomson

      Version of Record online: 9 FEB 2010 | DOI: 10.1002/asia.200900470

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      Tetrahydroisoquinoline synthesis: Acid-promoted cyclization of 1,2-disubstituted N-benzylethanolamines or their chromium tricarbonyl complexes (derived from ephedrine or pseudoephedrine) gives trans- or cis-N(2),3-dimethyl-4-phenyl-1,2,3,4-tetrahydroisoquinolines in high d.r.

    12. Fluorescent Sensors

      Fluorescence Sensing of Phytate in Water Using an Isothiouronium-attached Polythiophene (pages 605–611)

      Tsuyoshi Minami and Yuji Kubo

      Version of Record online: 21 JAN 2010 | DOI: 10.1002/asia.200900444

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      Fee, phy, fluo, fum: Water-soluble isothiouronium-attached polythiophene has been prepared for the first time, and is shown to posses a phytate-selective fluorescence response over ATP, PPi, CTP3, and H2PO4 in water at pH 5.5. The detection limit for phytate is estimated to be 83 nM.

    13. C[BOND]C Coupling

      An Air Stable Moisture Resistant Titanium Triflate Complex as a Lewis Acid Catalyst for C[BOND]C Bond Forming Reactions (pages 612–620)

      Steven D. Bull, Matthew G. Davidson, Andrew L. Johnson, Mary F. Mahon and Diane E. J. E. Robinson

      Version of Record online: 10 DEC 2009 | DOI: 10.1002/asia.200900305

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      Resistance isn′t futile! An air and moisture stable C3-symmetric titanium(IV) triflate, supported by a tripodal amine-(tris-phenolate) ligand, has been synthesized, characterized by X-ray crystallography, and shown to be a good Lewis acid catalyst for a range of aza-Diels–Alder, Diels–Alder, syn aldol, allylation, and alkylation reactions.

    14. Ring-Opening Polymerization

      Iron(III) and Zinc(II) Calixarene Complexes: Synthesis, Structural Studies, and Use as Procatalysts for ε-Caprolactone Polymerization (pages 621–633)

      Abdessamad Arbaoui, Carl Redshaw, Mark R. J. Elsegood, Victoria E. Wright, Akina Yoshizawa and Takehiko Yamato

      Version of Record online: 27 JAN 2010 | DOI: 10.1002/asia.200900514

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      Opening rings: Synthetic routes have been investigated towards new iron(III) procatalysts for ε-caprolactone, utilizing the heterobimetallic reagents [(THF)MFe(OtBu)3]2 (M=Na, K) and calix[n]arenes or oxacalixarenes. Improved polymerization activity is observed in the case of the related zinc(II) systems over that observed for the iron(III) heterobimetallic systems.

  8. Preview

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Reviews
    7. Communications
    8. Full Papers
    9. Preview
    1. Preview: Chem. Asian J. 4/2010 (page 639)

      Version of Record online: 22 FEB 2010 | DOI: 10.1002/asia.201090007

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