Total synthesis of natural (−)-codonopsinine employing stereoselective reduction of quaternary α-hydroxypyrrolidine
作者:Hidemi Yoda、Tomohito Nakajima、Kunihiko Takabe
DOI:10.1016/0040-4039(96)01042-8
日期:1996.7
A novel and efficient process is described for the total synthesis of a dihydroxypyrrolidine alkaloid, (−)-codonopsinine in 33% overall yield. The synthetic strategy is based on the stereoselective reduction of an α-hydroxypyrrolidine intermediate, elaborated through asymmetric deoxygenation of a homochiral quaternary α-hydroxylactam.
描述了一种新颖且有效的方法,用于以23%的总收率全合成二羟基吡咯烷生物碱(-)-codonopsinine。合成策略基于α-羟基吡咯烷中间体的立体选择性还原,该还原是通过同手性季铵α-羟基内酰胺的不对称脱氧来完成的。