Halonium Ion-Assisted Deiodination of Styrene-Based Vicinal Iodohydrins Followed by Rearrangement through Phenyl Migration
摘要:
Acid activation of bromate/bromide couple at 0-10 degrees C was found to trigger the deiodination of styrene-based vicinal iodohydrins. Violet coloration of the organic layer was ascribed to formation of IBr. Deiodination was followed by phenyl migration and deprotonation leading to formation of phenyl acetone and 2-phenylpropanal in good yields from 1-iodo-2-phenylpropan-2-ol and 2-iodo-1-phenylpropan-1-ol, respectively. Phenyl acetaldehyde-which was obtained in 92% GC yield from styrene iodohydrin-was also presumably formed in analogous manner. NBS and HOCl too were effective for transformation of styrene iodohydrin into phenyl acetaldehyde,
Cambie,R.C. et al., Journal of the Chemical Society. Perkin transactions I, 1977, p. 226 - 230
作者:Cambie,R.C. et al.
DOI:——
日期:——
STEREOSELECTIVE CHEMOENZYMATIC PROCESS FOR PREPARING OPTICALLY ENRICHED PHENYLGLYCIDATES
申请人:COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH
公开号:EP1601778A1
公开(公告)日:2005-12-07
US7060471B2
申请人:——
公开号:US7060471B2
公开(公告)日:2006-06-13
[EN] STEREOSELECTIVE CHEMOENZYMATIC PROCESS FOR PREPARING OPTICALLY ENRICHED PHENYLGLYCIDATES<br/>[FR] PROCEDE CHIMIOENZYMATIQUE STEREOSELECTIF POUR LA PREPARATION DE PHENYLGLYCIDATES OPTIQUEMENT ENRICHIS
申请人:COUNCIL SCIENT IND RES
公开号:WO2004081219A1
公开(公告)日:2004-09-23
The present invention relates to a novel and efficient chemoenzymatic process of preparation of optically active trans alkyl phenylglycidates. The invention particularly discloses a novel process for the chemoenzymatic synthesis of two enantiomers of trans alkyl phenylglycidate i.e. alkyl(2S,3R)-phenylglycidate and alkyl(2R,3S)-phenylglycidate of formulae 7 and 8 respectively.