Diastereoselective Syntheses of Indoloquinolizidines by a Pictet−Spengler/Lactamization Cascade
作者:Huihui Fang、Xiaoyu Wu、Linlin Nie、Xiaoyang Dai、Jie Chen、Weiguo Cao、Gang Zhao
DOI:10.1021/ol101922h
日期:2010.12.3
adopting a cis H2/H12b geometry has been realized by a Pictet−Spengler/lactamization cascade sequence. The absolute stereochemistry at C2, C3, and C12b was governed by the originally created chirality of the Michael adduct through organocatalyzed conjugate addition of dialkyl malonates to α,β-unsaturated aldehydes.
通过Pictet-Spengler /内酰胺化级联序列,实现了采用顺式H2 / H12b几何结构的高度官能化的吲哚并[2,3-α]喹唑烷类的非对映选择性合成。C2,C3和C12b处的绝对立体化学由迈克尔加成物的最初手性决定,该手性是通过将丙二酸二烷基酯与α,β-不饱和醛进行有机催化的共轭加成反应而形成的。