Microbiological and chemical methods in the asymmetric oxidation of sulfides: A comparative study for the preparation of (S)-vinyl sulfoxides
摘要:
The enantiogenicity of biological and chemical oxidation at the sulfur atom was studied on a series of prochiral vinyl sulfides for the preparation of sulfoxides of (S)-absolute configuration. Using either fungal cultures, Sharpless-modified reagent or chiral oxaziridine, the enantiomeric excesses varied according to the substrate's steric and/or electronic structure; the three methods were complementary.
ELECTROLYTIC REDUCTION OF 1-METHYLSULFINYL-1-METYLTHIO-2-ARYLETHENES AT MERCURY AND PLATINUM ELECTRODES IN ACETONITRIL
作者:Akira Kunugi、Kyo Abe
DOI:10.1246/cl.1984.159
日期:1984.2.5
The electrolytic reduction of 1-methylsulfinyl-1-methylthio-2-arylethenes involves a cleavage of one carbon–sulfurbond, resulting in formation of E-1-methylthio-2-arylethenes in good yields, but not Z-isomers, in the presence of excess phenol as a proton donor.
作者:Kodai Yamada、Mika B. Kintzel、Gregory J. P. Perry、Hayate Saito、Hideki Yorimitsu
DOI:10.1021/acs.orglett.2c03013
日期:2022.10.14
We report the formation of zinc reagents by the reaction of styrylsulfonium salts with zinc powder. Transition metals and other additives are not required for promoting zincation. Zincation tolerates a variety of sensitive functional groups, including esters, bromides, and boronic esters, and proceeds with complete retention of stereochemistry. This method presents a practical approach to the formation