1-(4-bromobenzyl)-2-oxo-1,2-dihydropyridine-3-carboxylic acid 、
(2S)-2-氨基-5-[(叔丁氧羰基)氨基]戊酸甲酯盐酸盐 、
2-(1h-Benzotriazole-1-yl)-1,1,3,3-tetramethyluronium hexafluorophosphate 以
三乙胺 为溶剂,
以to give methyl (2S)-2-({[1-(4-bromobenzyl)-2-oxo-1,2-dihydropyridin-3-yl]carbonyl}amino)-5-[(tert-butoxycarbonyl)amino]pentanoate (0.62 g) as a white solid的产率得到methyl (2S)-2-({[1-(4-bromobenzyl)-2-oxo-1,2-dihydropyridin-3-yl]carbonyl}amino)-5-[(tert-butoxycarbonyl)amino]pentanoate