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。