7,7-dimethyl-1,6-dioxaspiro[2.5]octan-5-ylmethanol 、
((1R,4S)-4-((S,Z)-4-(tert-butyldimethylsilyloxy)pent-2-enamido)cyclohexyl)methyl 4-nitrophenyl carbonate 在
4-二甲氨基吡啶 作用下,
以
乙腈 为溶剂,
反应 12.0h,
以53%的产率得到((1R,4s)-4-((S,Z)-4-(tert-butyldimethylsilyloxy)pent-2-enamido)cyclohexyl)methyl (7,7-dimethyl-1,6-dioxaspiro[2.5]octan-5-yl)methyl carbonate