rac-(4bR,6R,8aR,9S)-2,3-dimethoxy-11-methyl-6,7,8,8a,9,10-hexahydro-5H-9,4b-(epiminoethano)phenanthren-6-ol 在
potassium tert-butylate 作用下,
以
苯 为溶剂,
反应 6.0h,
以80%的产率得到(1R,9S,10R)-4,5-dimethoxy-17-methyl-17-azatetracyclo[7.5.3.01,10.02,7]heptadeca-2,4,6-trien-13-one