重氮甲烷 、
3,9-Di-tert-butyl-11-isopropenyl-5,5-dimethyl-7,12,12-trioxo-7,12-dihydro-5H-6-oxa-12λ6-thia-dibenzo[a,d]cyclooctene-1-carboxylic acid 以
乙醚 为溶剂,
反应 0.25h,
以53%的产率得到3,9-Di-tert-butyl-11-isopropenyl-5,5-dimethyl-7,12,12-trioxo-7,12-dihydro-5H-6-oxa-12λ
6-thia-dibenzo[a,d]cyclooctene-1-carboxylic acid methyl ester