丁二酸酐 、
2-(1,3-dihydro-5-methyl-2,4-dioxopyrimidin-1-yl)-N-{2-[(4,4'-dimethoxytrityl)oxy]-1-(hydroxymethyl)-ethyl}acetamide 在
4-二甲氨基吡啶 、
三乙胺 作用下,
以
1,2-二氯乙烷 为溶剂,
生成 4-{2-{[2-(1,3-dihydro-5-methyl-2,4-dioxopyrimidin-1-yl)-1-oxoethyl]amino}-3-[(4,4'-dimethoxytrityl)oxy]propoxy}-4-oxobutanoic acid