(6R,7S,8S,9S)-8-(tert-Butyl-dimethyl-silanyloxy)-9-methyl-9-((1S,4R)-1-methyl-2-oxa-bicyclo[2.2.2]oct-5-en-4-yl)-1,4-dioxa-spiro[4.4]nonane-6,7-diol 在
对甲苯磺酸 作用下,
以
二氯甲烷 为溶剂,
反应 16.0h,
以30%的产率得到(6R,7S,8S,9S)-8-(tert-Butyl-dimethyl-silanyloxy)-9-methyl-9-((1R,6S)-4-methyl-7-oxa-bicyclo[4.2.0]oct-4-en-1-yl)-1,4-dioxa-spiro[4.4]nonane-6,7-diol