benzyl (S)-N-(1-(2-bromo-5-methoxyphenyl)-3-(3-methoxyphenyl)but-3-en-2-yl)-N-(2-oxoethyl)carbamate 在
aluminum (III) chloride 作用下,
以
二氯甲烷 为溶剂,
以70%的产率得到benzyl (6S,9S)-4-bromo-1-methoxy-7-(3-methoxyphenyl)-6,9-dihydro-5H-6,9-(epiminomethano)benzo[7]annulene-11-carboxylate