Synthesis of (+)-Febrifugine and a Formal Synthesis of (+)-Halofuginone Employing an Organocatalytic Direct Vinylogous Aldol Reaction
作者:Sunil Pansare、Eldho Paul
DOI:10.1055/s-0033-1338706
日期:——
3-disubstituted piperidinone, a common intermediate to (+)-febrifugine and (+)-halofuginone. The enantioselective organocatalytic direct vinylogous aldol reaction of γ-crotonolactone and a suitable aldehyde was utilized in the synthesis of a functionalized γ-butenolide. The γ-butenolide (aldol product) was stereoselectively converted into a 5-aminoalkyl butyrolactone, which isomerized to the key 2,3-disubstituted
献给斯科特E.丹麦教授在他的60之际个生日 抽象 γ-巴豆内酯和合适的醛的对映选择性有机催化直接乙烯基醛醇缩合反应被用于合成官能化的γ-丁烯内酯。将γ-丁烯内酯(羟醛产物)立体选择性地转化为5-氨基烷基丁内酯,其异构化为关键的2,3-二取代的哌啶酮,后者是(+)-非贝芬净和(+)-卤丁酮的常见中间体。 γ-巴豆内酯和合适的醛的对映选择性有机催化直接乙烯基醛醇缩合反应被用于合成官能化的γ-丁烯内酯。将γ-丁烯内酯(羟醛产物)立体选择性地转化为5-氨基烷基丁内酯,其异构化为关键的2,3-二取代的哌啶酮,后者是(+)-非贝芬净和(+)-卤丁酮的常见中间体。