(R)-7-acetamido-2-(tert-butoxycarbonyl)-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid 、
3-[1-(2S-amino-3-methylbutyl)-3R,4R-dimethyl-4-piperidinyl]phenol 在
(benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 、
三乙胺 作用下,
以
四氢呋喃 为溶剂,
反应 2.0h,
以65%的产率得到tert-butyl (3R)-7-(acetylamino)-3-{[(1S)-1-{[(3R,4R)-4-(3-hydroxyphenyl)-3,4-dimethylpiperidin-1-yl]methyl}-2-methylpropyl]carbamoyl}-3,4-dihydroisoquinoline-2(1H)carboxylate