Synthesis of phenethylamines from phenylacetonitriles obtained by alkylation of cyanide ion with mannich bases from phenols and other benzylamines
作者:J.H. Short、D.A. Dunnigan、C.W. Ours
DOI:10.1016/0040-4020(73)80127-9
日期:1973.1
alkylating agents. With such compounds it was necessary to prepare the quaternary salts before alkylation could be achieved. 6-Hydroxydopamine was prepared from 2,4,5-trimethoxybenzaldehyde utilizing the latter approach. 3,5-Dimethoxy-4-hydroxyphenethylamine was cyclized to the corresponding dihydroisoquinoline. The isoquinoline and tetrahydroisoquinoline analogs were also prepared. 4-Hydroxy-3-met
通过在酚上进行曼尼希反应或通过醛的还原烷基化获得的苄胺已代替苄基氯用于氰化氰离子化,从而获得可还原为苯乙胺的腈。来自伯,仲和叔胺的4-羟基-3-甲氧基苯基乙腈的产率大致相同。没有邻位或对位的苄胺OH基团不充当烷基化剂。对于此类化合物,必须先制备季盐,然后才能实现烷基化。使用后一种方法由2,4,5-三甲氧基苯甲醛制备6-羟基多巴胺。将3,5-二甲氧基-4-羟基苯乙胺环化为相应的二氢异喹啉。还制备了异喹啉和四氢异喹啉类似物。将4-羟基-3-甲氧基苯基乙腈水解为高香草酸,即多巴胺的天然代谢产物。