Enantioselective Synthesis of (+)-Estrone Exploiting a Hydrogen Bond-Promoted Diels−Alder Reaction
作者:Marko Weimar、Gerd Dürner、Jan W. Bats、Michael W. Göbel
DOI:10.1021/jo100053j
日期:2010.4.16
Starting from Dane’s diene and methylcyclopentenedione, (+)-estrone is synthesized along the Quinkert−Dane route in 24% total yield. The keystep is an enantioselective Diels−Alderreaction promoted by an amidiniumcatalyst as efficiently as by a traditional Ti-TADDOLate Lewis acid.
从 Dane 的二烯和甲基环戊烯二酮开始,沿 Quinkert-Dane 路线合成 (+)-雌酮,总产率为 24%。关键步骤是由脒催化剂与传统的 Ti-TADDOLate Lewis 酸一样有效地促进对映选择性 Diels-Alder 反应。