1-(1-Phenyl-ethyl)-1,2-dihydro-2-oxo-nicotinsaeure 、
2-甲基-2-丙基(E)-N5-(氨基{[(2,2,5,7,8-五甲基-3,4-二氢-2H-苯并吡喃-6-基)磺酰基]氨基}亚甲基)-L-鸟氨酰i噻吩基n酸酯 、
2-(1h-Benzotriazole-1-yl)-1,1,3,3-tetramethyluronium hexafluorophosphate 、
N,N-二异丙基乙胺 以
N,N-二甲基甲酰胺 为溶剂,
以to provide 174 mg tert-butyl (2S)-2-({[2-oxo-1-(1-phenylethyl)-1,2-dihydropyridin-3-yl]carbonyl}amino)-5-{[(2,2,5,7,8-pentamethyl-3,4-dihydro-2H-chromen-6-yl)sulfonyl]carbamimidamido}pentanoate的产率得到tert-butyl (2S)-2-({[2-oxo-1-(1-phenylethyl)-1,2-dihydropyridin-3-yl]carbonyl}amino)-5-{[(2,2,5,7,8-pentamethyl-3,4-dihydro-2H-chromen-6-yl)sulfonyl]carbamimidamido}pentanoate