Synthesis of 4-(3,5-dialkyl-4-hydroxyphenyl)pyridines.
作者:C. Combellas、C. Suba、A. Thiébault
DOI:10.1016/s0040-4039(00)61235-2
日期:1992.8
Starting from 4-chloropyridine and 2,6-dialkylphenoxides, 4-(3,5-dialkyl-4-hydroxyphenyl)pyridines are obtained via an electrochemically induced SRN1 reaction using 2,4′ -bipyridine as a mediator (alkyl= pentyl, isopropyl, methyl). Quaternization of 4-(3,5-dipentyl-4-hydroxyphenyl)pyridine by linear alkyl halides, followed by deprotonation, gives (pyridinio-phenoxide) zwitterions.
从4-氯吡啶和2,6-二烷基苯氧化物开始,通过电化学诱导的S RN 1反应,使用2,4'-联吡啶作为介体,获得4-(3,5-二烷基-4-羟基苯基)吡啶(烷基=戊基,异丙基,甲基)。4-(3,5-二戊基-4-羟基苯基)吡啶被直链烷基卤化物季铵化,然后去质子化,得到(吡啶酚-酚盐)两性离子。