dimethyl 3-(tert-butyldiphenylsilyl)oxy-2-oxopropylphosphonate 、 (1S,2R,3R,5S,7R)-2-[tert-butyl(dimethyl)silyl]oxy-3-methyl-5-[[(4R,6R,8R,10S,13R)-13-methyl-10-(2-phenylmethoxyethyl)-13-triethylsilyloxy-5,7,9-trioxadispiro[5.1.58.26]pentadecan-4-yl]methyl]-6,8-dioxabicyclo[3.2.1]octane-7-carbaldehyde 在
N,N-二异丙基乙胺 、
lithium chloride 作用下,
以
乙腈 为溶剂,
反应 18.0h,
以86%的产率得到(E)-4-[(1S,2R,3R,5R,7S)-5-[(2S,5R,6R,8R,10R)-2-(2-benzyloxy)ethyl-5-methyl-5-(triethylsilyl)oxy-1,7,9-trioxadispiro[5.1.5.2]pentadecan-10-ylmethyl]-2-(tert-butyldimethylsilyl)oxy-3-methyl-6,8-dioxabicyclo[3.2.1]octan-7-yl]-1-(tert-butyldiphenylsilyl)oxybut-3-en-2-one