Syntheses of metabolites of ethyl 4-(3,4-dimethoxyphenyl)-6,7-dimethoxy-2-(1,2,4-triazol-1-ylmethyl)quinoline-3-carboxylate (TAK-603)
作者:Masahiro Mizuno、Makoto Yamashita、Yasuhiro Sawai、Koji Nakamoto、Mitsutaka Goto
DOI:10.1016/j.tet.2006.06.110
日期:2006.9
Convenient and efficient syntheses of ethyl 4-(3-hydroxy-4-methoxyphenyl)-6,7-dimethoxy-2-(1,2,4-triazol-1-ylmethyl)quinoline-3-carboxylate (1d) and 10-(3,4-dimethoxyphenyl)-7,8-dimethoxy-2H-pyridazino[4,5-b]quinolin-1-one (1e), metabolites of TAK-603 (1), have been achieved. Use of the methanesulfonyl as a protective group of the phenolic hydroxy for Friedel–Crafts reaction enabled a new simpler synthetic
方便有效地合成4-(3-羟基-4-甲氧基苯基)-6,7-二甲氧基-2-(1,2,4-三唑-1-基甲基)喹啉-3-羧酸乙酯(1d)和10-已经获得了TAK-603(1)的代谢物(3,4-二甲氧基苯基)-7,8-二甲氧基-2 H-吡啶并[4,5 - b ]喹啉-1-酮(1e)。使用甲磺酰基作为酚羟基的保护基团用于Friedel-Crafts反应,可实现一种新的更简单的1d高产合成路线。使用Kröhnke反应将氯甲基衍生物(23)转化为甲酰基衍生物(32),然后用肼环化,形成新化合物1e。