作者:Joseph P. Michael、Christ M. Jungmann
DOI:10.1016/s0040-4020(01)89049-9
日期:——
(±)-Lamprolobine 1 and (±)-epilamprolobine 4 were prepared by a route featuring sulphide contraction of thiolactam 7 with bromoacetonitrile to give vinylogous cyanamide 8, reduction and ring closure to the unsaturated quinolizidine 11, and selective reduction of the latter to set up appropriate stereochemistry for the target alkaloids.
(±)-Lamprolobine 1和(±)-Epilamprolobine 4通过以下方法制备:特征在于硫代内酰胺7与溴乙腈的硫化物收缩,得到乙烯基氰胺8,还原并闭环成不饱和喹唑啉11,并选择性还原后者以固化。为目标生物碱建立适当的立体化学。