(R)-4-((R,E)-2-((tert-butoxycarbonyl)imino)-4-ethyl-6-oxo-4-(pent-4-en-1-yl)tetrahydropyrimidin-1(2H)-yl)chromane-6-carboxylic acid 、
(1R,2R)-1-amino-6-bromo-2,3-dihydro-1H-inden-2-ol 在
1-羟基苯并三唑 、
盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺 、
N,N-二异丙基乙胺 作用下,
以
四氢呋喃 为溶剂,
生成 tert-butyl ((R,E)-1-((R)-6-(((1R,2R)-6-bromo-2-hydroxy-2,3-dihydro-1H-inden-1-yl)carbamoyl)chroman-4-yl)-4-ethyl-6-oxo-4-(pent-4-en-1-yl)tetrahydropyrimidin-2(1H)-ylidene)carbamate