Stereospecific synthesis of the (3aα,11α,12aα)-decahydrobenzo[<i>a</i>]pyrrolo[3,2-<i>g</i>]quinolizine ring system
作者:Robin D. Clark、Janis T. Nelson、David B. Repke
DOI:10.1002/jhet.5570300338
日期:1993.5
A stereospecific synthesis of racemic (3aα,11bα,12aβ)-1,2,3,3a,4,6,7,11b,12,12a-decahydro-9-methoxy-1-(methylsulfonyl)benzo[α]pyrrolo[3,2-g]quinolizine (2) is reported. Cyclocondensation of lithiated pyrrolecarboxamide 5 and dihydroisoquinoline 6 afforded the key tetracyclic intermediate 7. Hydrogenation of 7 gave the 3aα,11bα,12aα-isomer 9 which was subsequently converted to 2.
外消旋(3aα,11bα,12aβ)-1,2,3,3a,4,6,7,11b,12,12a-十氢-9-甲氧基-1-(甲磺酰基)苯并[α]吡咯[的立体定向合成据报道有3,2-克喹喹嗪(2)。锂化吡咯甲酰胺5和二氢异喹啉6的环缩合得到关键的四环中间体7。7的氢化得到3aα,11bα,12aα-异构体9,随后将其转化为2。