申请人:Hoechst AG
公开号:US05631403A1
公开(公告)日:1997-05-20
The present invention relates to a process for the preparation of hydroxycarboxanilides of the formula (1) ##STR1## in which R.sup.1 and R.sup.2 are identical or different and are hydrogen, halogen, a nitro group, a cyano group, a straight-chain or branched alkyl, alkenyl, alkynyl or alkoxy group having 1 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, a cycloalkyl group having 6 to 12 carbon atoms or an aryl group having 6 to 12 carbon atoms, R.sup.3 is hydrogen or a straight-chain or branched alkyl group having 1 to 12 carbon atoms and n is an integer from 1 to 12, by reacting a halocarboxanilide of the formula (2) ##STR2## in which R.sup.1, R.sup.2, R.sup.3 and n have the same meaning as in formula (1) and Hal is chlorine, bromine or iodine, with a basic compound in a solvent mixture comprising water and one or more polar aprotic solvents at a temperature of 40.degree. to 180.degree. C.
本发明涉及一种制备式(1)的羟基羧酰胺的方法,其中R.sup.1和R.sup.2相同或不同,是氢、卤素、硝基、氰基、直链或支链烷基、烯基、炔基或具有1至12个碳原子的烷氧基,具有7至12个碳原子的芳基,具有6至12个碳原子的环烷基或具有6至12个碳原子的芳基,R.sup.3是氢或具有1至12个碳原子的直链或支链烷基,n是1至12的整数,通过在温度为40°C至180°C的溶剂混合物中,将式(2)的卤代羧酰胺与一种碱性化合物反应而得到。其中R.sup.1、R.sup.2、R.sup.3和n的含义与式(1)中相同,Hal是氯、溴或碘。