First enantioselective synthesis of gingesulfonic acids and unequivocal determination of their absolute stereochemistry
作者:Grazia Bencivenni、Maria Moccia、Andrea Ravelli、Malachi W. Gillick-Healy、Brian G. Kelly、Mauro F. A. Adamo
DOI:10.1039/c9ob02662b
日期:——
Herein we report the first organocatalysed enantioselectivesynthesis of gingesulfonic acids and shogasulfonic acids via a mild and convenient aminothiourea-catalysed conjugate addition of bisulfite to the olefin moiety of α,β-unsaturated carbonyls-a technology previously reported by us. A series of optically active naturally occurring sulfonic acids are prepared in their natural and unnatural configurations