申请人:BASF Aktiengesellschaft
公开号:US05414086A1
公开(公告)日:1995-05-09
A process for the preparation of a 4-methylpyrimidine of the general formula I ##STR1## in which R.sup.1 denotes C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.8 cycloalkyl, aryl, C.sub.7 -C.sub.12 phenalkyl, C.sub.7 -C.sub.12 alkylphenyl, NH.sub.2, NHCN, OH, and SH, in which a 1-aminovinyl methyl ketone of the general formula II ##STR2## in which R.sup.2 and R.sup.3 denote C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.8 cycloalkyl, aryl, C.sub.7 -C.sub.12 phenylalkyl, C.sub.7 -C.sub.12 alkylphenyl, C.sub.1 -C.sub.20 hydroxyalkyl or together denote a C.sub.2 -C.sub.7 alkylene chain optionally mono- to tetra-substituted by C.sub.1 -C.sub.4 alkyl and optionally interrupted by oxygen, nitrogen, or sulfur, is caused to react with a carboxamide or amidine or a salt thereof of the general formula III ##STR3## in which R.sup.1 has the aforementioned meanings and x stands for oxygen or NH, at temperatures ranging from 20.degree. to 200.degree. C. and pressures ranging from 0.01 to 50 bar.
一种制备通式I的4-甲基嘧啶的方法,其中R.sup.1代表C.sub.1-C.sub.20烷基,C.sub.3-C.sub.8环烷基,芳基,C.sub.7-C.sub.12苯基烷基,C.sub.7-C.sub.12烷基苯基,NH.sub.2,NHCN,OH和SH,其中通式II的1-氨基乙烯基甲基酮##STR2##其中R.sup.2和R.sup.3代表C.sub.1-C.sub.20烷基,C.sub.3-C.sub.8环烷基,芳基,C.sub.7-C.sub.12苯基烷基,C.sub.7-C.sub.12烷基苯基,C.sub.1-C.sub.20羟基烷基或一起表示C.sub.2-C.sub.7烷基链,可选择地由C.sub.1-C.sub.4烷基单取代至四取代,并可由氧、氮或硫间断,使其与通式III的羧酰胺、脲或其盐发生反应##STR3##其中R.sup.1具有上述含义,x代表氧或NH,在20°C至200°C的温度和0.01至50巴的压力范围内。