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 enantioselective synthesis 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
在本文中,我们报道了通过温和且方便的氨基硫脲催化的亚硫酸氢盐向α,β-不饱和羰基的烯烃部分共轭加成,这是我们先前报道的第一个有机催化的对氨基磺酸和Shogas磺酸的对映选择性合成。以其天然和非天然构型制备了一系列光学活性的天然磺酸,并且它们的绝对构型通过单晶X射线衍射法明确证实。