4-(methylbenzamido)-1,3,4,5-tetrahydro-5-hydroxy-α-methylenebenzindole-5-propionic acid γ-lactone 在
triethyloxonium fluoroborate 、
sodium carbonate 作用下,
以
二氯甲烷 为溶剂,
以74%的产率得到4-(methylamino)-1,3,4,5-tetrahydro-5-hydroxy-α-methylenebenz
indole-5-propionic acid γ-lactone