{4-[2,8-bis-(tert-butyldimethylsilanyloxy)-11,12-dihydro-5H-6,13-dioxabenzo[3,4]cyclohepta[1, 2-a]naphthalen-5-yl]phenoxy}acetic acid 、
三甲基硅烷化重氮甲烷 以
甲醇 、
正己烷 、
苯 为溶剂,
以371 mg的产率得到{4-[2,8-bis-(tert-butyldimethylsilanyloxy)-11,12-dihydro-5H-6,13-dioxabenzo[3,4]cyclohepta[1,2-a]naphthalen-5-yl]phenoxy}acetic acid methyl ester