ethyl octahydro-1H-cyclopropa[a]pentalene-1-carboxylate 、 ethyl (1S,3S,4S,7R)-3,8,8-trimethyltricyclo[5.1.0.03,5]octane-4-carboxylate 在
octahydro-1H-cyclopropa[a]pentalene-1-carboxylic acid 作用下,
以
甲醇乙酸乙酯 为溶剂,
以The title compound was obtained in 17% yield by recrystallization from EtOAc/MeOH, as a single diastereomer by HPLC analysis (conditions as described in Example 5C, retention time of 10.29 minutes.) 1H NMR (DMSO-d6, 300 MHz) δ1.04(t), 1.21-1.72(m), 1.90(d), 1.93(d), 2.10(t), 2.34(q), 3.58(d), 6.93(s), 7.25(s), 7.97(t)的产率得到octahydro-1H-cyclopropa[a]pentalene-1-carboxylic acid