Asymmetric Alkaloid Synthesis: A One-Pot Organocatalytic Reaction to Quinolizidine Derivatives
作者:Johan Franzén、Andreas Fisher
DOI:10.1002/anie.200805130
日期:2009.1.12
One pot+two steps=three stereocenters: A short enantioselective synthesis to access the indolo[2,3a]quinolizidine and the benzo[a]quinolizidine skeleton has been developed (see scheme; TMS=trimethylsilyl, R1=aromatic, R2=3‐indoyl or 3,4‐dimethoxyphenyl). The sequence involves an organocatalytic conjugate addition and subsequent acid‐catalyzed cyclization of the acyliminium ion.
一锅两步=三个立体中心:已开发出一种简短的对映体选择性合成方法,用于合成吲哚[2,3 a ]喹唑烷和苯并[ a ]喹唑烷骨架(参见方案; TMS =三甲基甲硅烷基,R 1 =芳香族,R 2 = 3-吲哚基或3,4-二甲氧基苯基)。该序列涉及有机催化共轭物的添加以及随后对酰基酰亚胺离子的酸催化环化。