[2-((1R,3S,5S)-6,6-Dibromo-bicyclo[3.1.0]hex-3-yl)-ethyl]-carbamic acid (1R,2S)-2-phenyl-cyclohexyl ester 在
3 A molecular sieve 、 silver perchlorate 作用下,
以
乙二醇二甲醚 为溶剂,
反应 19.0h,
生成 (1R,5S)-8-Bromo-2-aza-bicyclo[3.3.1]non-7-ene-2-carboxylic acid (1R,2S)-2-phenyl-cyclohexyl ester 、 (1S,5R)-8-Bromo-2-aza-bicyclo[3.3.1]non-7-ene-2-carboxylic acid (1R,2S)-2-phenyl-cyclohexyl ester