ethyl iodomethyl carbonate 、
TAK-456 在
氩 、
正己烷 、 desired compound 、
1-[(2R,3R)-2-(2,4-difluorophenyl)-2-hydroxy-3-[2-oxo-3-[4-(1H-tetrazol-1-yl)phenyl]-1-imidazolidinyl]butyl]-4-ethoxycarbonyloxymethyl-1H-1,2,4-triazolium iodide 作用下,
以
乙腈 为溶剂,
反应 14.0h,
以to give 1-[(2R,3R)-2-(2,4-difluorophenyl)-2-hydroxy-3-[2-oxo-3-[4-(1H-tetrazol-1-yl)phenyl]-1-imidazolidinyl]butyl]-4-ethoxycarbonyloxymethyl-1H-1,2,4-triazolium iodide (Compound 17, 1.1 g) as a pale yellow powder的产率得到1-[(2R,3R)-2-(2,4-difluorophenyl)-2-hydroxy-3-[2-oxo-3-[4-(1H-tetrazol-1-yl)phenyl]-1-imidazolidinyl]butyl]-4-ethoxycarbonyloxymethyl-1H-1,2,4-triazolium iodide