二(2-氨基乙基)氢磷酸酯 、
4-(3-{[3-(2-tert-butoxy-2-oxoethyl)-2,4-dioxo-1,2,3,4-tetrahydroquinazolin-7-yl]carbonyl}-2-methylindolizin-1-yl)benzoic acid 在
O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate 、
三乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 24.25h,
以34%的产率得到tert-butyl [7-({1-[4-({9-[4-(3-{[3-(2-tert-butoxy-2-oxoethyl)-2,4-dioxo-1,4-dihydroquinazolin-7(2H)-yl]carbonyl}-2-methylindolizin-1-yl)phenyl]-4-hydroxy-4-oxido-9-oxo-3,5-dioxa-8-aza-4λ
5-phosphanon-1-yl}carbamoyl)phenyl]-2-methylindolizin-3-yl}carbonyl)-2,4-dioxo-1,4-dihydroquinazolin-3(2H)-yl]acetate