4,4-Dimethyl-5-[3-(4-methyl-2,6,7-trioxa-bicyclo[2.2.2]oct-1-yl)-propyl]-2-trifluoromethanesulfonyloxy-cyclopent-1-enecarboxylic acid methyl ester 、 alkaline earth salt of/the/ methylsulfuric acid 以
四氢呋喃 为溶剂,
反应 3.0h,
以96%的产率得到4,4-Dimethyl-2-(2-methyl-allyl)-5-[3-(4-methyl-2,6,7-trioxa-bicyclo[2.2.2]oct-1-yl)-propyl]-cyclopent-1-enecarboxylic acid methyl ester