申请人:Ciba-Geigy Corporation
公开号:US03974166A1
公开(公告)日:1976-08-10
A novel process for the preparation of 2,4-dibromo-, 2,6-dibromo- and 2,4,6-tribromopyridines, and the new bromopyridines to be obtained therewith, are disclosed. The novel process comprises treating 2,4-dichloro-, 2,6-dichloro- and 2,4,6-trichloropyridines, in an anhydrous organic medium, with gaseous HBr at temperatures between 80.degree. and 130.degree.C, said process being both simple and economical.
揭示了一种新的制备2,4-二溴-、2,6-二溴-和2,4,6-三溴吡啶的新方法,以及由此获得的新溴吡啶。该新方法包括在无水有机介质中,以80度至130度之间的温度,用气态HBr处理2,4-二氯-、2,6-二氯-和2,4,6-三氯吡啶,该方法既简单又经济。