Deracemization of (±)-cis-dialkyl substituted oxides via enantioconvergent hydrolysis catalysed by microsomal epoxide hydrolase
摘要:
Both enantiomers of cis-(+/-)-2,3-epoxyheptane 1a, cis-3,4-epoxyheptane 1b, cis-3,4-epoxynonane 1c, cis-3,4-epoxynonane-1-ol Id, and cis-1-methoxy-3,4-epoxynonane le undergo a highly stereoselective microsomal epoxide hydrolase catalysed hydration at the (S) carbon to give the corresponding three (R,R)-diol at complete conversion. A total kinetic resolution of racemic epoxides is also obtained with la and 1e. (C) 1998 Elsevier Science Ltd. All rights reserved.
Tandem IBX‐Promoted Primary Alcohol Oxidation/Opening of Intermediate β,γ‐Diolcarbonate Aldehydes to (
<i>E</i>
)‐γ‐Hydroxy‐α,β‐enals
作者:Anupama Kumari、Sachin P. Gholap、Rodney A. Fernandes
DOI:10.1002/asia.201900421
日期:2019.7
A tandem IBX‐promoted oxidation of primary alcohol to aldehyde and opening of intermediate β,γ‐diolcarbonate aldehyde to (E)‐γ‐hydroxy‐α,β‐enal has been developed. Remarkably, the carbonate opening delivered exclusively (E)‐olefin and no over‐oxidation of γ‐hydroxy was observed. The method developed has been extended to complete the stereoselective total synthesis of both (S)‐ and (R)‐coriolides and