L-γ-glutamyl-L-γ-glutamyl-L-γ-glutamyl-L-γ-glutamyl-L-γ-glutamyl-L-glutamic acid heptakis-t-butyl ester 、
5--N-methylamino>thenoic acid 在
diethyl cyanophosphoridate 、
三乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 2.0h,
以44%的产率得到ditert-butyl (2S)-2-[[(4S)-4-[[(4S)-4-[[(4S)-4-[[(4S)-4-[[(4S)-4-[[5-[methyl-[(2-methyl-4-oxo-1H-quinazolin-6-yl)methyl]amino]thiophene-2-carbonyl]amino]-5-[(2-methylpropan-2-yl)oxy]-5-oxopentanoyl]amino]-5-[(2-methylpropan-2-yl)oxy]-5-oxopentanoyl]amino]-5-[(2-methylpropan-2-yl)oxy]-5-oxopentanoyl]amino]-5-[(2-methylpropan-2-yl)oxy]-5-oxopentanoyl]amino]-5-[(2-methylpropan-2-yl)oxy]-5-oxopentanoyl]amino]pentanedioate