(R)-3-(naphthalene-2-sulfonamido)-3-phenylpropanoic acid 、
3-(piperidin-1-ylmethyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrazine 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 为溶剂,
以2.1%的产率得到(R)-N-(3-oxo-1-phenyl-3-(3-(piperidin-1-ylmethyl)-5,6-dihydro-[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl)propyl)naphthalene-2-sulfonamide