trimethyl 1,9-dimethyl-5-(3-hydroxy-4-aminophenyl-N,N,O-triacetate)dipyrro-methene 、
trifluoroborane diethyl ether 在
三乙胺 作用下,
以
二氯甲烷 为溶剂,
生成 trimethyl 4,4-difluoro-8-(3-hydroxy-4-aminophenyl-N,N,O-triacetate)-3,5-dimethyl-4-bora-3a,4a-diaza-s-indacene