methyl 3-methyl-3-(1-cyano-2-methoxy-2-oxoethyl)-2,3-dihydro-2-hydroxy-5-methoxy-1H-indole-1-carboxylate 在
氢氧化钾 作用下,
以
四氢呋喃 为溶剂,
反应 0.33h,
生成 exo-methyl 3-cyano-5-methoxy-3a-methyl-2-oxo-2,3,3a,8a-tetrahydro-8H-furo[2,3-b]indole-8-carboxylate 、 endo-methyl 3-cyano-5-methoxy-3a-methyl-2-oxo-2,3,3a,8a-tetrahydro-8H-furo[2,3-b]indole-8-carboxylate