Simple strategy for synthesis of optically active allylic alcohols and amines by using enantioselective organocatalysis
作者:Hao Jiang、Nicole Holub、Karl Anker Jørgensen
DOI:10.1073/pnas.0914523107
日期:2010.11.30
A simple organocatalytic one-pot protocol for the construction of opticallyactive allylic alcohols and amines using readily available reactants and catalyst is presented. The described reaction is enabled by an enantioselective enone epoxidation/aziridination-Wharton-reaction sequence affording two highly privileged and synthetically important classes of compounds in an easy and benign way. The advantages
Rapid Enantioselective and Diastereoconvergent Hybrid Organic/Biocatalytic Entry into the Oseltamivir Core
作者:Virendra K. Tiwari、Douglas R. Powell、Sylvain Broussy、David B. Berkowitz
DOI:10.1021/acs.joc.1c00326
日期:2021.5.7
enzyme-catalyzed carbonyl reduction on the resultant racemic α,β-unsaturated ketone. A screen of a broad ketoreductase (KRED) library identified several that deliver the desired allylicalcohol with nearly perfect facial selectivity at the new center for each antipodal substrate, indicating that the enzyme also is able to completely override inherent diastereomeric bias in the substrate. Conversion is complete
作者:Liang Zhu、Ryan Lauchli、Mandy Loo、Kenneth J. Shea
DOI:10.1021/ol070397c
日期:2007.6.1
A type 2 N-acylnitroso intramolecular Diels-Alder reaction followed by reductive N-O bond cleavage formed the B and C rings of the Stemona alkaloid stenine. Further elaboration provided the functionalized tricyclic core.