1-Chloroalkyl p-tolyl sulfoxides as useful agents for homologation of carbonyl compounds: conversion of carbonyl compounds to .alpha.-hydroxy acids, esters, and amides and .alpha.,.alpha.'-dihydroxy ketones
作者:Tsuyoshi Satoh、Kenichi Onda、Koji Yamakawa
DOI:10.1021/jo00013a011
日期:1991.6
One-carbon homologation of carbonyl compounds to alpha-hydroxy acids, esters, and amides by the use of 1-chloroalkyl p-tolyl sulfoxide as a hydroxycarbonyl anion equivalent is reported. Oxidation of the vinyl chlorides, the intermediates of the above-mentioned method, with osmium tetraoxide gives alpha,alpha'-dihydroxy ketones which are found in biologically active natural products such as cortisone and adriamycin.
SATOH, TSUYOSHI;ONDA, KEN-ICHI;YAMAKAWA, KOJI, J. ORG. CHEM., 56,(1991) N3, C. 4129-4134
作者:SATOH, TSUYOSHI、ONDA, KEN-ICHI、YAMAKAWA, KOJI
DOI:——
日期:——
1-Chloroalkyl<i>p</i>-Tolyl Sulfoxides as Acetylide Anion Equivalent: A Novel Synthesis Including Asymmetric Synthesis of Propargylic Alcohols from Carbonyl Compounds
作者:Tsuyoshi Satoh、Yasumasa Hayashi、Koji Yamakawa
DOI:10.1246/bcsj.64.2153
日期:1991.7
Addition of the carbanion of 1-chloroalkyl p-tolyl sulfoxide to carbonyl compounds gave the adducts, which were heated in refluxing toluene or xylene to give vinyl chlorides in high overall yield. Dehydrochlorination of the vinyl chlorides with excess n-BuLi afforded propargylic alcohols in high yields. Asymmetric synthesis of both enantiomers of the propargylic alcohols was realized using optically