Synthesis of Air- and Moisture-Stable, Storable Chiral Oxorhenium Complexes and Their Application as Catalysts for the Enantioselective Imine Reduction
salicyloxazoline based oxorhenium(V) complexes have been synthesized and their catalytic application for the asymmetricreduction of ketimines using hydrosilane as hydride source is disclosed. A broad substrate scope, high yields, and excellent enantioselectivities (up to 99 %) are attained. Furthermore, the syntheses of enantiopure α‐amino esters, γ‐ and δ‐lactams, and isoindolinones have also been carried
合成了空气/水分稳定,晶体和可储存的手性水杨基恶唑啉基氧化(V)配合物,并公开了其在氢化硅烷作为氢化物源的情况下催化不对称还原酮亚胺的催化应用。获得了广泛的底物范围,高收率和出色的对映选择性(最高99%)。此外,对映体纯α-氨基酯,γ-和δ-内酰胺以及异吲哚啉酮的合成也已使用该方法进行。最后,该方法已应用于具有药物相关性的合成靶标,例如R -(+)-沙丁胺碱和R -(+)-crispine A.
Generation of Carbonyl Compounds from Oximes through Electrooxidative Deoximation
作者:Yeliang Xue、Shaozhong Wang
DOI:10.1021/acs.joc.3c02631
日期:2024.3.15
electrochemical protocol was developed to generate carbonylcompoundsfrom oximes with excellent functional group compatibility. Mechanistic experimental studies support the idea that an electrooxidative pathway of oximes might be involved, in which the water may serve as an oxygen nucleophile and the oxygen source for the final carbonylcompounds.
Mono et dinitrosation en position benzylique des complexes du benz'ene chrometricarbonyle. Synth'ese directe d'oximes et d'hydroximates
作者:M.-C. Senechal-Tocquer、D. Senechal、J.-Y. Le Bihan、D. Gentric、B. Caro、M. Gruselle、G. Jaouen
DOI:10.1016/0022-328x(92)80152-n
日期:1992.7
In basic media, aromatic hydrocarbons and benzylmethylethers complexed by Cr(CO)3 units are readily nitrosated at the benzylic position by tBuONO, giving rise to Z and E oximes and hydroximates in moderate to excellent yields. With the meta-xylene and isochromane complexes it is possible to obtain a dinitrosation.