Enantioconvergent hydrolysis by epoxidehydrolase is a promising method for the synthesis of important vicinaldiols. However, the poor regioselectivity of the naturally occurring enzymes results in low enantioconvergence in the enzymatic hydrolysis of styrene oxides. Herein, modulated residue No. 263 was redesigned based on structural information and a smart variant library was constructed by site‐directed
Compounds containing oxazolidinone moiety and uses thereof
申请人:——
公开号:US20040039209A1
公开(公告)日:2004-02-26
A compound and method for producing an enantiomerically enriched epoxide from an olefin using a chiral ketone and an oxidizing agent is disclosed. In particular, the compound is of the formula: I wherein R
1
, R
2
, R
3
and R
4
are those defined herein.
Cobalt(II)-catalyzed stereospecific coupling of N-methylanilines with styreneoxides is developed via tandem C–N and C–O bond formation using tert-butyl hydroperoxide (TBHP) as an oxidant. Optically active epoxide can be reacted with high optical purity.
Mechanochemical Synthesis of 1,2-Diketoindolizine Derivatives from Indolizines and Epoxides Using Piezoelectric Materials
作者:Yumei Wang、Ziwu Zhang、Lichan Deng、Tianfeng Lao、Zhengquan Su、Yue Yu、Hua Cao
DOI:10.1021/acs.orglett.1c02575
日期:2021.9.17
A simple and efficient mechanochemical-induced approach for the synthesis of 1,2-diketoindolizine derivatives has been developed. BaTiO3 was used as the piezoelectric material in this transformation. This method features no usage of solvent, simple experimental operation, scalable potential, and high conversion efficiency, which make it attractive and practical.
Regio- and chemoselective rearrangement of terminal epoxides into methyl alkyl and aryl ketones
作者:Yingying Tian、Eva Jürgens、Doris Kunz
DOI:10.1039/c8cc06503a
日期:——
The development of the highly active pincer-type rhodium catalyst 2 for the nucleophilic Meinwald rearrangement of functionalised terminal epoxides into methyl ketones under mild conditions is presented. An excellent regio- and chemoselectivity is obtained for the first time for aryl oxiranes.