A new process, which can be carried out on the technical scale, had been found for the preparation of 2-alkoxy-6-bromo-naphthalenes, especially suitable as starting compounds for the synthesis of estrogens, which comprises brominating 2-hydroxy-naphthalene-1-carboxylic acid with bromine, decarboxylating the 6-bromo-2-hydroxynaphthalene-1-carboxylic acid by heating the reaction mixture at 100 - 125.degree. C, and alkylating the 6-bromo-2-hydroxy-naphthalene formed. The process can be conducted easily and with high yields.
一种新的工艺被发现,可以在技术规模上进行,用于制备2-烷氧基-6-
溴萘,特别适用于合成
雌激素的起始化合物。该工艺包括用
溴对2-羟基
萘-1-
羧酸进行
溴化,通过在100-125度C加热反应混合物脱羧6-
溴-2-羟基
萘-1-
羧酸,然后烷基化所形成的6-
溴-2-羟基
萘。该工艺易于进行且产率高。