cyclizations proceeded in moderate to good yields (up to 81 %), but with low enantioselectivity when chiral phosphanes such as (R)-BINAP were used as ligands. However, enantiomerically pure 10-substituted pyrrolo[1,2-b]isoquinolines were efficiently obtained by a diastereoselective approach using chiral nonracemic pyrrolidines as substrates, generating a tertiary stereocentre.
已经研究了通过 2-烯基取代的
吡咯和
吡咯烷的分子内 Mizoroki-Heck 反应在
吡咯并
异喹啉骨架的 C-10 处生成四元和三元立体中心。环化以中等至良好的产率(高达 81%)进行,但当手性膦如 (R)-BINAP 用作
配体时,对映选择性较低。然而,使用手性非外消旋
吡咯烷作为底物,通过非对映选择性方法有效地获得了对映异构纯的 10-取代
吡咯并 [1,2-b]
异喹啉,产生了一个三级立体中心。