Asian Journal of Organic Chemistry
Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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January 20, 2014
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Recently Published Articles
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- Structures and Reactivities of Iminium Ions Derived from Substituted Cinnamaldehydes and Various Chiral Imidazolidin-4-ones
Feng An, Shyeni Paul, Dr. Johannes Ammer, Dr. Armin R. Ofial, Dr. Peter Mayer, Dr. Sami Lakhdar and Prof. Dr. Herbert Mayr
Article first published online: 8 APR 2014 | DOI: 10.1002/ajoc.201402009
Worth its salt: Iminium salts derived from substituted cinnamaldehydes and imidazolidinones have been synthesized and characterized by X-ray crystallography. Kinetic investigations of their reactions with cyclic ketene acetals were performed to quantify their electrophilic reactivity.
- A Practical Synthesis of Chiral Oxazolines through a Highly Diastereoselective Coupling–Cyclization Reaction of N-(Buta-2,3-dienyl)amides and Aryl Iodides
Nan Wang, Bo Chen and Prof. Shengming Ma
Article first published online: 8 APR 2014 | DOI: 10.1002/ajoc.201400023
It’s got a ring to it! A highly trans diastereoselective synthesis of 2,4,5-trisubstituted oxazoline derivatives is described, which proceed through a palladium-catalyzed coupling–cyclization reaction of N-(buta-2,3-dienyl)amides with aromatic iodides. The highly enantioenriched oxazoline derivatives were easily prepared with excellent 1,2-induction by using optically active substrates. DMF=N,N-dimethylformamide.
- Toward the Design of Halide- and Metal-Free Ionic-Liquid Catalysts for the Cycloaddition of CO2 to Epoxides
Manuele Galvan, Maurizio Selva, Alvise Perosa and Marco Noè
Article first published online: 8 APR 2014 | DOI: 10.1002/ajoc.201402044
A new epoch: An innovative sustainable protocol for the cycloaddition of CO2 to epoxides was devised through a class of carbonate and carboxylate phosphonium salts (ionic liquids). These compounds were prepared by a halide- and metal-free synthesis, and act as efficient catalysts in the cycloaddition reaction.
- Synthesis of opp-Dibenzohexaphyrins(22.214.171.124.1.1) by Retro-Diels–Alder Reaction
Shin-ichiro Ishida, Dr. Daiki Kuzuhara, Prof. Hiroko Yamada and Prof. Atsuhiro Osuka
Article first published online: 8 APR 2014 | DOI: 10.1002/ajoc.201402023
opp it! opp-Dibenzo - and hexaphyrins(126.96.36.199.1.1) were synthesized in good yields using retro-Diels–Alder reactions of the corresponding opp-bis(bicyclo[2.2.2]octadiene)-fused precursors. Comparison of the optical properties of dibenzo-annulated and non-annulated bis-rhodium(I) complexes revealed that opp-dibenzo annulation causes modest but distinct spectral red shifts due to extension of the conjugated system.