2-(2-((S)-2-(tert-butoxycarbonyl)-1,2,3,4-tetrahydroisoquinolin-3-yl)-2-hydroxyethyl)-4,4-dimethyl-1-oxo-1,2,3,4-tetrahydroisoquinoline-6-carboxylic acid 、
(1R,3r,5S)-3-methoxy-8-azabicyclo[3.2.1]octane 在
1-丙基磷酸酐 、
N,N-二异丙基乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 1.0h,
生成 tert-butyl (S)-3-((R)-1-hydroxy-2-(6-((1R,3R,5S)-3-methoxy-8-azabicyclo[3.2.1]octane-8-carbonyl)-4,4-dimethyl-1-oxo-3,4-dihydroisoquinolin-2(1H)-yl)ethyl)-3,4-dihydroisoquinoline-2(1H)-carboxylate 、 tert-butyl (S)-3-((S)-1-hydroxy-2-(6-((1R,3S,5S)-3-methoxy-8-azabicyclo[3.2.1]octane-8-carbonyl)-4,4-dimethyl-1-oxo-3,4-dihydroisoquinolin-2(1H)-yl)ethyl)-3,4-dihydroisoquinoline-2(1H)-carboxylate