methyl (2S,3S,5R)-3-amino-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolane-2-carboxylate 、
(2S,3S,5R)-5-(5-methyl-2,4-dioxopyrimidin-1-yl)-3-[[(2S,3S,5R)-5-(5-methyl-2,4-dioxopyrimidin-1-yl)-3-[(2-methylpropan-2-yl)oxycarbonylamino]oxolane-2-carbonyl]amino]oxolane-2-carboxylic acid 在
1-羟基苯并三唑 、
盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺 、
N,N-二异丙基乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 120.0h,
以55%的产率得到methyl (2S,3S,5R)-5-(5-methyl-2,4-dioxopyrimidin-1-yl)-3-[[(2S,3S,5R)-5-(5-methyl-2,4-dioxopyrimidin-1-yl)-3-[[(2S,3S,5R)-5-(5-methyl-2,4-dioxopyrimidin-1-yl)-3-[(2-methylpropan-2-yl)oxycarbonylamino]oxolane-2-carbonyl]amino]oxolane-2-carbonyl]amino]oxolane-2-carboxylate