Angewandte Chemie International Edition in English

Cover image for Vol. 25 Issue 11

November 1986

Volume 25, Issue 11

Pages 947–1038

Currently known as: Angewandte Chemie International Edition

    1. Cover Picture (Angew. Chem. Int. Ed. Engl. 11/1986)

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198609471

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      The cover page shows the structure of the black crystalline compound of empirical formula [W(OiPr3)] (elemental analysis): It consists of a 1 : 1 mixture of [W2(OiPr)6] and its dimer [W4(OiPr)12] (green: W; red: 0; WW bonds: black). The crystals are obtained upon treatment of a solution of [W2(OtBu)6] with six equivalents of isopropyl alcohol. 1H-NMR findings evidence an equilibrium between monomer and dimer. Further details of this formal cycloaddition of two W[TRIPLE BOND]W units to give a “W4-cyclobutadiene” are reported by M. H. Chisholm on p. 1014.

  1. Reviews

    1. Top of page
    2. Reviews
    3. Communications
    4. Book Reviews
    5. Correspondences
    1. Selective Synthesis by Use of Lewis Acids in the Presence of Organocopper and Related Reagents. New Synthetic Methods (61) (pages 947–959)

      Prof. Dr. Yoshinori Yamamoto

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198609473

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      The strong nucleophile RCu is unexpectedly compatible with strong electrophiles such as BF3 and AlCl3 at low temperatures, forming stable and remarkably useful reagents. Compounds of the type RCu·BF3 undergo unusually selective reactions. A 1,4 addition (not possible with Me2CuLi) is depicted below as example.

    2. Hydroxide Ion Initiated Reactions Under Phase Transfer Catalysis Conditions: Mechanism and Implications. New Synthetic Methods (62) (pages 960–970)

      Prof. Dr. Mordecai Rabinovitz, Yoram Cohen and Dr. Marc Halpern

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198609601

      Severe anhydrous conditions, expensive solvents and dangerous bases can often be dispensed with if classical methods are replaced by phase-transfer processes which involve the use of aqueous solutions of NaOH or KOH (PTC/OH processes). Decisive is the catalyst: not only have quaternary ammonium and phosphonium ions proven especially suitable in this respect, but also crown ethers, cryptates, and open-chain polyethers. Even though the mechanisms are controversial, valuable new ideas can be stimulated for the optimization of PTC/OH processes.

    3. Charge Separation in Excited States of Decoupled Systems—TICT Compounds and Implications Regarding the Development of New Laser Dyes and the Primary Process of Vision and Photosynthesis (pages 971–988)

      Priv.-Doz. Dr. Wolfgang Rettig

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198609711

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      When a dichromophoric molecule after excitation preferably adopts a twisted state 1 with intramolecular charge transfer (TICT state), an anomalous fluorescence or even a very efficient fluorescence quenching can be the result. It can therefore be explained with the concept of the TICT state why the fluorescence quantum yield, e.g. in the case of 3 (no twisting to the fluorescence quenching TICT state possible) is considerably greater than in the case of 2.

  2. Communications

    1. Top of page
    2. Reviews
    3. Communications
    4. Book Reviews
    5. Correspondences
    1. 22] Cycloadditions of 4-Phenyl-4H-1,2,4-triazole-3,5-dione and Singlet Oxygen to Homofuran (pages 989–990)

      Prof. Dr. Waldemar Adam, Dr. Axel Griesbeck, Prof. Dr. Frank-Gerrit Klärner and Dipl.-Chem. Dietmar Schröer

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198609891

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      No competition between [π2+π2]- and [(σ2+π2)+π2]-cycloaddition, but exclusively the first mentioned reaction is observed in reactions of homofuran 1. With triazolidine and 1O2 it forms the products 2 and 3, respectively, probably via zwitterionic intermediates.

    2. [Cl7Cu5(ReS4)]3⊖, a Hexanuclear Complex Anion with Double Cubane-Like Structure (pages 990–991)

      Prof. Dr. Achim Müller, Erich Krickemeyer and Dr. Hartmut Bögge

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198609901

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      The first coordination compound of the ReSmath image ion, the title compound 1, has a most unusual structure: It is made up of two facesharing (distorted) cubes–a double cubane–a type of structure that was hitherto unknown. 1 is formed as the [PPh4]2[NEt4] salt. In the structure depicted on the right, four Cl ligands are represented by lines only.

    3. Flash Photolysis of Os(CO)5 in Benzene Solution. Detection of Os(CO)4 Benzene by Fast Time-Resolved IR Spectroscopy (pages 991–992)

      Dr. Stephen P. Church, Priv.-Doz. Dr. Friedrich-Wilhelm Grevels, Dr. Gong-Yu Kiel, Dr. William A. Kiel, Prof. Dr. Josef Takats and Prof. Dr. Kurt Schaffner

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198609911

      The formation and decomposition of the short-lived species Os(CO)4 · benzene in benzene are best studied by the methods quoted in the title. The generation of Os(CO)4·benzene was achieved by flash photolysis of Os(CO)5 in benzene. On the basis of kinetic findings, a dissociation mechanism with reversible cleavage of benzene is proposed for the decomposition. Os(CO)4 is finally trapped by CO with re-formation of Os(CO)5 or by Os(CO)5 with formation of Os2(CO)9.–The CO-stretching vibration pattern of Os(CO)4·benzene is consistent with a C2v-structure for the Os(CO)4 unit.

    4. The Use of (+)-8-Phenylneomenthol in the Synthesis of Enantiomerically Pure (−)-Jasmonate Methyl Ester (pages 992–993)

      Prof. Dr. Gerhard Quinkert, Dr. Hans-Günther Schmalz, Dipl.-Chem. Elmar M. Dzierzynski, Dr. Gerd Dürner and Dr. Jan W. Bats

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198609921

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      A convenient route to (–)-methyl jasmonate 1, a valuable raw material in the perfumery industry, makes use of the new chiral auxiliary 2. Compound 2 is readily accessible from naturally occurring (R)-(+)-pulegone. It was possible with the help of 2 to synthesize a chiral vinylcyclopropanedicarboxylate, a precursor of 1, which was hitherto only obtainable via a circuitous route.

    5. Crystal Structure of Cl2O6 (pages 993–994)

      Dipl.-Chem. Klaus M. Tobias and Prof. Dr. Martin Jansen

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198609931

      Cl2O6 is present as ionic chloryl perchlorate, ClOmath imageClOmath image, in the crystalline state. This is not surprising in view of the chemical behavior of Cl2O6–it is used as perchlorate “supplier” for the synthesis of anhydrous perchlorates–but was not to be expected according to the results of earlier structural investigations. The Cl–O distance in the ClOmath image ion (ca. 141 pm) is much shorter than in the neutral ClO2 in the gas phase. Each cation is coupled with two anions (and conversely) to give polymeric groups.

    6. Optically Active Cyclopentanediol Synthetic Building Blocks from Tartaric Acid (pages 994–996)

      Prof. Dr. Hans Jürgen Bestmann and Dr. Thomas Moenius

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198609941

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      Two enantiomeric five-membered ring building blocks from the same educt: This was achieved by reaction of 1 with two different nucleophilic reagents. 1,4-Addition of R2CuLi to 1 and cleavage of MeOH furnished (R,R)-2; 1,2-Addition of RM to 1, allyl rearrangement, and MeOH-cleavage lead to the mirror image (S,S)-2.

    7. NaNb3O3F–a Niobium-Niobium Triple Bond with “Side-On” Coordination by Nb Atoms (pages 996–997)

      Dr. Jürgen Köhler and Prof. Dr. Arndt Simon

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198609961

      The remarkable new compound NaNb3O5F is formed on annealing NaF, Nb powder, and Nb2O5. According to an X-ray structure analysis, Nb is present in the +4 and +2 oxidation states. The Nb2⊕ ions form pairs and a structural group (with eight surrounding O-atoms) as is observed in [Re2Cl8]2⊕. The short d(Nb[BOND]Nb) distance of 261.4 pm (observed for the first time in the case of Nb) is explained in terms of a triple bond. This Nb2 dumbbell is coordinated fourfold “side-on” by the Nb4⊕ ions.

    8. Conformational Prerequisites for the in vitro Inhibition of Cholate Uptake in Hepatocytes by Cyclic Analogues of Antamanide and Somatostatin (pages 997–999)

      Prof. Dr. Horst Kessler, Mechtild Klein, Dr. Arndt Müller, Klaus Wagner, Jan Willem Bats, Dr. Kornelia Ziegler and Prof. Dr. Max Frimmer

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198609971

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      Constitution and conformation determine the biological activity of a peptide, as demonstrated by comparative investigations of the inhibition of cholate uptake in liver cells by somatostatin, antamanide, cyclolinopeptide A and 1 and 2. The crystal structure of 1 is the same as that of 2 over a wide range and both react strongly cytoprotectively.

    9. Vicinal Pentaketones (page 999)

      Prof. Dr. Rolf Gleiter, Dipl.-Chem. Gerhard Krennrich and Dipl.-Chem. Michael Langer

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198609991

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      Since vicinal tri- and tetraketones are already extremely reactive, it was questionable whether the homologous pentaketones could possibly be synthesized. Surprisingly, the pentaketones 1 and 2 are obtainable in a few steps from acetone and ethyl pivalate or ethyl benzoate, respectively. They are characterized, as expected, by a very low first ionization energy, a low first reduction potential (−0.27 V vs Ag/AgCl), and a long-wave UV absorption.

    10. syn- and anti-Bishomoanthraquinone (pages 1000–1002)

      Prof. Dr. Emanuel Vogel, Stefan Böhm, Dr. Achim Hedwig, Dr. Bernd O. Hergarten, Dr. Johann Lex, Dr. Joachim Uschmann and Prof. Dr. Rolf Gleiter

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610001

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      The remarkable regio- and stereoselectivity of the bromination of syn-bismethano[14]annulene 1 can be explained in terms of pronounced π/σ interactions in 1. The product is almost exclusively (90%) the 7,14-dibromo derivative 2, which can be converted via solvolysis and oxidation into the syn-bishomoanthraquinone 3. With regards to its quinonoid properties, this potential building block for “bishomoanthraquinone dyes” compares with anthraquinone rather than with p-benzoquinone. For steric reasons, in the case of the anti-isomer of 3 the quinonoid character diminishes further.

    11. A 1λ5,3λ5,5λ3-Triphosphabenzene Derivative (pages 1002–1003)

      Prof. Dr. Ekkehard Fluck, Prof. Dr. Gerd Becker, Dipl.-Chem. Bernhard Neumüller, Dipl.-Chem. Robert Knebl, Dr. Gernot Heckmann and Dr. Heinz Riffel

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610021

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      The first ring compound containing the (P[DOUBLE BOND]C)3 skeleton, the title compound 3, was prepared as shown below. 13C[BOND]NMR data indicate a highly ylidic character of the C4[BOND]P5[BOND]C6 grouping.

    12. 1-Phospha-1,2,3-butatriene (pages 1003–1004)

      Prof. Dr. Gottfried Märkl, Dipl.-Chem. Hans Sejpka, Stefan Dietl, Dr. Bernd Nuber and Prof. Dr. Manfred L. Ziegler

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610031

      The first phosphacumulenes of type 1 have been synthesized from dichloro(2,4,6-tri-tert-butylphenyl)phosphane and lithioallenes. According to an X-ray structure analysis, the equation image unit in 1a, R′ = R″ = Ph, is linear. In the case of 1b, with Me and SiMe3 as substituents (R′, R″), the expected E/Z isomer could be isolated.

      • equation image
    13. Chiral Copper-Semicorrin Complexes as Enantioselective Catalysts for the Cyclopropanation of Olefins by Diazo Compounds (pages 1005–1006)

      Dipl.-Chem. Hugo Fritschi, Dipl.-Naturwiss. Urs Leutenegger and Dr. Andreas Pfaltz

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610051

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      Optical yields of up to 97% ee characterize the cyclopropanation of olefins with diazoacetates in the presence of the semicorrin complex CuL2 (R = CMe2OH). The chiral, C2-symmetrical semicorrin ligands LH are readily accessible in optically pure form from pyroglutamic acid as starting material.

    14. [Ag(NCS)2AsF6]n—A Metal Complex with Dithiocyanogen as Ligand (pages 1006–1007)

      Prof. Dr. Herbert W. Roesky, Jürgen Schimkowiak, Karen Meyer-Bäse and Prof. Dr. Peter G. Jones

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610061

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      A polymer chain containing the unit …[BOND]Ag[BOND]N[BOND]C[BOND]S[BOND]S[BOND]C[BOND]N[BOND] the cation of the title compound 2, is formed upon reaction of 1 with AgAsF6. The anions are disordered in the crystal. 2 is the first transition metal complex with 1 as ligand.

    15. Recognition of Chirality by ENDOR Spectroscopy (pages 1007–1008)

      Prof. Dr. Hartmut B. Stegmann, Helmut Wendel, Dipl.-Chem. Hoang Dao-Ba, Paul Schuler and Prof. Dr. Klaus Scheffer

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610071

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      1 serves as a model compound for natural products in which an OH-group is attached to an asymmetric C-atom. It was oxidized with PbO2 to the paramagnetic phenoxy radical 2. After addition of a chiral amine, two signals appeared in the ENDOR spectrum in the ratio 1:1 for the H-atom at the asymmetric C-atom. They are assigned to the two enantiomers (R)-2 and (S)-2.

    16. A Simple Route to Ruthenacycloalkanes (pages 1008–1009)

      Prof. Dr. Ekkehard Lindner, Rolf-Michael Jansen and Dr. Hermann August Mayer

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610081

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      The mononuclear carbonylruthenium complexes 1–3 can be synthesized by “nucleophilic elimination-cycloaddition.” Reaction of CO or PPh3 with tetracarbonylruthenacyclopentane 2 at 60°C affords cyclopentanone. In the absence of a CO atmosphere, 2 already decomposes at −20°C with formation of 1,3-butadiene as well as trans- and cis-2-butene in the ratio 3:3:1.

    17. O2-Generation by Oxidation of Water with Di- and Trinuclear Ruthenium Complexes as Homogeneous and Heterogeneous Catalysts (pages 1009–1011)

      Dr. Ramasamy Ramaraj, Prof. Dr. Akira Kira and Prof. Dr. Masao Kaneko

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610091

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      The decomposition of water into O2 and H is an attractive process in many ways. The processes in a system consisting of ruthenium red (formula: [(NH3)5RuIII[BOND]O[BOND]RuIV(NH3)4[BOND]O[BOND]RuIII(NH3)5]Cl6) as catalyst. CeIV as oxidizing agent, and, where necessary, Kaolin as carrier, can be explained as follows: CeIV generates from ruthenium red a species that adds two H2O-molecules to give 1. Cleavage of H and formation of the O[BOND]O bond leads to cyclic intermediates 2, which decomposes into O2 and ruthenium.

    18. [α-(Phenylsulfinyl)-α-methylbenzyllithium-tetramethylethylenediamine]2: Crystal Structure of an α-Sulfinyl “Carbanion” (pages 1011–1012)

      Michael Marsch, Priv.-Doz. Dr. Werner Massa, Gerhard Baum, Prof. Dr. Gernot Boche and Dr. Klaus Harms

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610111

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      The first X-ray structure analysis of a lithiated sulfoxide showed that the benzylic C-atom in [PhC̈(Me)[BOND]S̈(O) Ph]Li is not planar and that there is no interaction between this C-atom and the Li atom. In the crystalline state, the salt is present as a dimer with a central Li2O2 unit. A new model (right) can be formulated for the diastereofacial differentiation in the reaction of α-sulfinyl “carbanions” with electrophiles such as benzaldehyde.

    19. Elucidation of the Structure of Pharmacologically Active Magnesium L-Aspartate Complexes (pages 1013–1014)

      Prof. Dr. Hubert Schmidbaur, Dr. Gerhard Müller, Jürgen Riede, Dr. Gebhard Manninger and Dr. Joachim Helbig

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610131

      Magnesium therapy (infact prophylaxis, suppression of stress symptoms etc.) has proven successful on using complexes of magnesium with natural amino and polycarboxylic acids. Presumably their activity is due to formation of weak complexes, from which the magnesium is released again after transport. As has now been demonstrated, L-aspartic acid reacts as a di- to tridentate ligand depending on the pH. On the basis of X-ray crystallographic, spectroscopic and electrochemical data, a model has been designed which is consistent with medicopharmacological findings.

    20. The First Observation of the Equilibrium 2 M[TRIPLE BOND]M ⇄ M4 (M = Transition Metal); Synthesis and Structure of Hexaisopropoxyditungsten and Its Dimer (pages 1014–1015)

      Prof. Dr. Malcolm H. Chisholm, Dr. David L. Clark, Kirsten Folting and Dr. John C. Huffman

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610141

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      Dark crystals containing a 1:1 mixture of [W2(OiPr)6] and [W4(OiPr)12] are formed upon reaction of [W(OtBu)6] with six equivalents of iPrOH in dimethoxyethane. There is 1H-NMR spectroscopic evidence for the equilibrium (a) (isopropyl residue omitted for clarity).

    21. Direct Measurement of the “Isokinetic Rate Constant” in Additions of Diarylcarbenium Ions to 2-Methyl-2-butene (pages 1016–1017)

      Dipl.-Chem. Reinhard Schneider and Prof. Dr. Herbert Mayr

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610161

      The isokinetic rate constant kiso is of general importance. On the one hand, it is applicable for the compound with the isokinetic substituent at all temperatures, and, on the other, for all members of an isokinetic series at the isokinetic temperature. It has now been possible to measure kiso for the first time. In the case of the compounds, 1, X = Y = Me is the isokinetic substituent.

      • equation image
    22. Linear Reactivity-Selectivity Correlations in Additions of Diarylcarbenium Ions to Alkenes; a Rebuttal of the Reactivity-Selectivity Principle (pages 1017–1018)

      Prof. Dr. Herbert Mayr, Dipl.-Chem. Reinhard Schneider and Ute Grabis

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610171

      Does selectivity increase with decreasing reactivity? No! In a system consisting of diarylcarbenium ions (see previous communication) and alkenes all conceivable types of relationships between reactivity and selectivity were detectable. Moreover, observations within a set of similar reactions show that a certain reactivity-selectivity behavior is no proof of a certain interaction mechanism.

    23. Mini-Violerythrins: Why can C38-Carotinoids be Blue? (pages 1018–1021)

      Dipl.-Chem. Matthias Kummer, Dipl.-Chem. Georg Martin and Prof. Dr. Hans-Dieter Martin

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610181

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      The red dinorcanthaxanthin 1 becomes blue upon oxidation to violerythrin 2. That this slight modification of a carotinoid effects a shift in λmax of about 100 nm remained for a long time unexplained. Studies on miniviolerythrins–model compounds with shortened polyene chains–showed that the effect is mainly due to lowering of the π*-LUMO level.

    24. Unexpected “Two-Electron” Transfer in Cyclic Hydrazines–a Voltammetric Analysis (pages 1021–1023)

      Dipl.-Chem. Michael Dietrich, Priv.-Doz. Dr. Jürgen Heinze, Hans Fischer and Prof. Dr. Franz A. Neugebauer

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610211

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      Conformational changes could be shown to give rise to unusual cyclovoltammograms in the case of 1a and 1b. At low temperatures, compounds 1a and 1b formally show a two-electron transfer; in the case of 1a the rare crossing effect is observed. All other methods of conformation analysis failed in this case.

    25. 1,2,4,5-Tetrakis(dimethylamino)benzene, a New Electron Donor with Unusual Properties (pages 1023–1024)

      Dipl.-Chem. Karim Elbl, Claus Krieger and Prof. Dr. Heinz A. Staab

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610231

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      A product consisting of two vinylogous amidinium ions is formed when the title compounds gives up two electrons to iodide. The resulting salt forms diamagnetic, blackish-violet crystals. The two mesomeric π-electron systems are almost planar; the sixmembered ring in 1 has a twist-conformation.

    26. Total Synthesis of rac-Salutaridine and Sinoacutine ((−)-salutaridine)—A Novel Route to the Morphine Skeleton (pages 1025–1026)

      Dr. Wolfgang Ludwig and Prof. Dr. Hans J. Schäfer

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610251

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      (Biomimetic) C6′[BOND]C4 coupling is essential for formation of the morphine skeleton. It was accomplished by using a precursor 1 containing a tetrahydrogenated, substituted benzyl residue. The product 2 (salutaridine) can be converted into morphine (TBS = SitBuMe2, R1 = benzyl).

    27. Cope Rearrangement Induced by Medium-Sized Ring Strain (pages 1026–1027)

      Dipl.-Chem. Norbert Eisen and Prof. Dr. Fritz Vögtle

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610261

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      Ring expansion of medium-sized to large rings by four C atoms can be achieved by a new method: Upon reaction of the bis(bromomethyl) compound 1 with Na2S, not the expected primary product 2 but only the Cope rearrangement product can be isolated. The corresponding hydrocarbon can be obtained from 3 by photoextrusion of sulfur.

    28. Total Synthesis of Mycinolide V, the Aglycone of a Macrolide Antibiotic of the Mycinamycin Series (pages 1028–1030)

      Dipl.-Chem. Klaus Ditrich, Tomas Bube, Rainer Stürmer and Prof. Dr. Reinhard W. Hoffmann

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610281

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      The synthesis of the title compound 1 was accomplished in 29 steps. The C-1 to C-10 and C-11 to C-17 fragments 2 and 3, respectively, were prepared separately in enantiomerically pure form and then coupled. A key reagent of the synthesis was the boronate 4, which can be added highly diastereoselectively to aldehydes.

    29. Dinuclear Manganese(II,III,IV) Model Complexes for the Active Center of the Metalloprotein Photosystem II: Synthesis, Magnetism, and Crystal Structure of [LMnIII(μ-O)(μ-CH3CO2)2MnIVL][ClO4]3 (L = N,N′N″-Trimethyl-1,4,7-triazacyclononane) (pages 1030–1031)

      Prof. Dr. Karl Wieghardt, Ursula Bossek, Jacques Bonvoisin, P. Beauvillain, Dr. Jean-Jacques Girerd, Dr. Bernhard Nuber, Prof. Dr. Johannes Weiss and Priv.-Doz. Dr. Jürgen Heinze

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610301

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      Systematic variation of the oxidation states between + II and + IV in an Mn2 Complex could be achieved with a μ-oxo/μ-hydroxo-bis(μ-carboxylato)dimanganesesystem. MnII, MnII-1,MnIIMnIII-,MnIII,MnIII-2,MnIII,MnIV-3,and MnIV,MnIV-complexes are electrochemically detectable. The mixed valent MnIII,MnIV-title complex 3 was characterized by X-ray structure analysis.

    30. Complementary Epoxide Hydrolase vs Glutathione S-Transferase-Catalyzed Kinetic Resolution of Simple Aliphatic Oxiranes–Complete Regio- and Enantioselective Hydrolysis of cis-2-Ethyl-3-methyloxirane (pages 1032–1034)

      Dr. Dorothee Wistuba and Prof. Dr. Volker Schurig

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610321

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      The biotransformation of simple xenobiotic oxiranes with rat live enzymes has surprising results: epoxide hydrolases and glutathionone S-transferases are each preferentially converted into other enantiomers! In the case of the model example cis-2-ethyl-2-methyloxirane these are the (2R,3S)- and (2S,3R)-forms, respectively.

  3. Book Reviews

    1. Top of page
    2. Reviews
    3. Communications
    4. Book Reviews
    5. Correspondences
    1. Book Review: Metallo-organic Chemistry. By A. J. Pearson (page 1035)

      Wolfgang A. Herrmann

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610352

  4. Correspondences

    1. Top of page
    2. Reviews
    3. Communications
    4. Book Reviews
    5. Correspondences
    1. Discarding the Double Bond Rule? (page 1038)

      Prof. Dr. J. Goubeau

      Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.198610381