D-N-BOC-4-fluoro-3-nitrophenylalanine 、 (S)-N-{(R)-[4-Allyloxy-3-bromo-5-(tert-butyl-dimethyl-silanyloxy)-phenyl]-methylcarbamoyl-methyl}-2-amino-propionamide; compound with trifluoro-acetic acid 在
N,N-二异丙基乙胺 、 N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下,
以
二氯甲烷 、
N,N-二甲基甲酰胺 为溶剂,
反应 14.0h,
以76%的产率得到[(R)-1-[(S)-1-({(R)-[4-Allyloxy-3-bromo-5-(tert-butyl-dimethyl-silanyloxy)-phenyl]-methylcarbamoyl-methyl}-carbamoyl)-ethylcarbamoyl]-2-(4-fluoro-3-nitro-phenyl)-ethyl]-carbamic acid tert-butyl ester