Chromium(VI) oxide-mediated oxidation of polyalkyl-polypyridines to polypyridine-polycarboxylic acids with periodic acid
作者:Shigekazu Yamazaki
DOI:10.1080/00397911.2019.1618875
日期:2019.9.2
Abstract 4,4′-Dicarboxy-2,2′-bipyridine was synthesized quantitatively by chromium(VI) oxide-mediated oxidation of 4,4′-dimethyl-2,2′-bipyridine or 4,4′-diethyl-2,2′-bipyridine with periodic acid as the terminal oxidant in sulfuric acid. 5,5′-Dicarboxy-2,2′-bipyridine and 6,6’-dicarboxy-2,2′-bipyridine were also synthesized by the method from the corresponding dimethyl bipyridines in excellent yields
摘要 通过氧化铬(VI)介导的 4,4'-二甲基-2,2'-联吡啶或 4,4'-二乙基-2的氧化,定量合成了 4,4'-二羧基-2,2'-联吡啶, 2'-联吡啶在硫酸中以高碘酸为末端氧化剂。5,5'-二羧基-2,2'-联吡啶和6,6'-二羧基-2,2'-联吡啶也通过该方法由相应的二甲基联吡啶以优异的产率合成。4,4',4"-Tricarboxy-2,2':6',2"-三联吡啶以80%的产率从4,4',4"-三乙基-2,2':6',2"-获得三联吡啶和 4,4',4",4""-四羧基-2,2':6',2":6",2""-四联吡啶以 72% 的收率从 4,4',4" ,4'''-四乙基-2,2':6',2'':6",2'"-季铵按同样的方法制备。图形概要