(1R,10S,15S)-15-ethyl-8,11-diazapentacyclo[9.7.2.01,9.02,7.010,15]icosa-2,4,6,8-tetraen-18-one 在
sodium cyanoborohydride 作用下,
以
三氟乙酸 为溶剂,
以18%的产率得到(-)-(1S:7aR:12aS:12bS)-1-ethyl-15-oxo-12-(2,2,2-trifluoro-ethyl)-1,2,3,4,6,7,7a,12,12a,12b-decahydro-1,7a-propanoindolo<2,3-a>quinolizine