(2S,3R,4R)-1-((4-methoxybenzyl)oxy)-2,4-dimethylhex-5-yn-3-ol 、 (2R,3S,5S,7R,8S,9S)-7-(2-Benzyloxy-ethyl)-3-(tert-butyl-dimethyl-silanyloxy)-9-(tert-butyl-diphenyl-silanyloxy)-4,4,8-trimethyl-1,6-dioxa-spiro[4.5]decane-2-carbaldehyde 在
乙基溴化镁 作用下,
以
二氯甲烷 为溶剂,
以94%的产率得到(1R,4R,5R,6S)-1-[(2S,3S,5S,7R,8S,9S)-7-(2-Benzyloxy-ethyl)-3-(tert-butyl-dimethyl-silanyloxy)-9-(tert-butyl-diphenyl-silanyloxy)-4,4,8-trimethyl-1,6-dioxa-spiro[4.5]dec-2-yl]-7-(4-methoxy-benzyloxy)-4,6-dimethyl-hept-2-yne-1,5-diol