(2R,3S)-4-[(1R,2S)-2-[(1S,2R,3R,5R,7S)-2-(tert-butyldimethylsilyl)oxy-3-methyl-5-[(2S,5R,6R,8R,10R)-5-methyl-2-(2-propynyl)-5-(triethylsilyl)oxy-1,7,9-trioxadispiro[5.1.5.2]pentadecan-10-ylmethyl]-6,8-dioxabicyclo[3.2.1]octan-7-yl]-4-(tert-butyldiphenylsilyl)oxymethyl-1-(hydroxymethyl)-3-cyclohexen-1-yl]-2,3-dimethyl-1-butanol 、
叔丁基二甲基氯硅烷 在
咪唑 作用下,
以
二氯甲烷 为溶剂,
以98%的产率得到(1R,2S)-[1-[(2S,3R)-4-(tert-butyldimethylsilyl)oxy-2,3-dimethylbutyl]-2-[(1S,2R,3R,5R,7S)-2-(tert-butyldimethylsilyl)oxy-3-methyl-5-[(2S,5R,6R,8R,10R)-5-methyl-2-(2-propynyl)-5-(triethylsilyl)oxy-1,7,9-trioxadispiro[5.1.5.2]pentadecan-10-ylmethyl]-6,8-dioxabicyclo[3.2.1]octan-7-yl]-4-(tert-butyldiphenylsilyl)oxymethyl-3-cyclohexen-1-yl]methanol