、
(2S,4R)-1-[(2S)-2-(cyclopentyloxycarbonylamino)-3,3-dimethylbutanoyl]-4-(2-oxo-1,4-dihydroquinazolin-3-yl)pyrrolidine-2-carboxylic acid 在
N-甲基吗啉 、 Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
二氯甲烷 为溶剂,
反应 16.0h,
以85%的产率得到ethyl (1R)-1-[[(2S,4R)-1-[(2S)-2-(cyclopentyloxycarbonylamino)-3,3-dimethylbutanoyl]-4-(2-oxo-1,4-dihydroquinazolin-3-yl)pyrrolidine-2-carbonyl]amino]-2-ethenylcyclopropane-1-carboxylate