Catalytic Asymmetric Ring-Opening Reaction of<i>meso</i>-Epoxides with Aryl Selenols and Thiols Catalyzed by a Heterobimetallic Gallium-Titanium-Salen Complex
Abstractmagnified imageA chiral heterobimetallic Lewis acid complex has been developed as an efficient catalyst. The enantioselective desymmetrization of meso‐epoxides with aryl selenols and thiols catalyzed by the heterobimetallic complex has been optimized. The optically active β‐arylseleno alcohols and β‐hydroxy sulfides were obtained in good yields and high enantioselectivities (up to 97% ee and 92% ee, respectively). A strong synergistic effect between different Lewis acids was exhibited in the catalytic process.
Highly enantioselective kinetic resolution of trans-2-(phenylthio)cyclohexanol derivatives by immobilized Candida antartica B lipase
Candida antartica B (immobilized CAL-B) mediated resolutions of trans-2-(phenylthio)cyclohexanol derivatives using vinyl acetate as acylating agent and MTBE as solvent provide excellent enantioselectivity (up to >99%) and high yield of both the enantiomers in short reaction time. (C) 2013 Elsevier B.V. All rights reserved.
Thiol-oxygen cooxidation reactions of cyclopentene, cis- and trans-but-2-ene, norbornene, and norbornadiene
作者:Athelstan L. J. Beckwith、Rudolf D. Wagner
DOI:10.1021/jo00331a011
日期:1981.8
Borax-catalyzed thiolysis of 1,2-epoxides in aqueous medium
作者:Peng Gao、Peng-Fei Xu、Hongbin Zhai
DOI:10.1016/j.tetlet.2008.09.004
日期:2008.11
A convenient, economical, and practical protocol for borax-catalyzed thiolysis of 1,2-epoxides in aqueous medium has been developed, which has greatly expanded the utility scope of borax in organic synthesis. (C) 2008 Elsevier Ltd. All rights reserved.
Transfer Reactions Involving Boron. VII. The Stereochemistry of Ether Cleavages of Epoxides with Phenylthioborane<sup>1,2</sup>