(2aR,3S)-4-Chloro-3-p-tolyl-2a,3-dihydro-3a-aza-cyclobuta[j]cyclopenta[cd]azulene-1,2,5-tricarboxylic acid 5-ethyl ester 1,2-dimethyl ester 在
silica gel 作用下,
以
苯 为溶剂,
反应 120.0h,
以60%的产率得到2-Chloro-13-p-tolyl-1-aza-tricyclo[7.4.1.0
4,14]tetradeca-2,4(14),5,7,9,11-hexaene-3,11,12-tricarboxylic acid 3-ethyl ester 11,12-dimethyl ester