申请人:Sanko Chemical Company Ltd.
公开号:US04009205A1
公开(公告)日:1977-02-22
A process for the preparation of 4-amino-3-methyl-N-substituted or unsubstituted alkylanilines comprising acylating and/or sulfonylating 4-amino-3-methyl-nitro-benzene having the formula (I) ##STR1## with an acylation or sulfonylation agent to obtain a compound having the general formula (II) ##STR2## wherein R.sub.1 represents a hydrogen atom or an acyl group, R.sub.2 represents an acyl group or a sulfonyl group, or R.sub.1 and R.sub.2 can combine as a difunctional acyl group; reducing the nitro group of the compound having the general formula (II) with hydrogen in the presence of a metal hydrogenation catalyst to obtain a compound having the general formula (III) ##STR3## wherein R.sub.1 and R.sub.2 are as above defined; alkylating the amino group of the compound having the general formula (III) with an alkylation agent selected from the group consisting of an alkyl halide, a substituted alkyl halide and an alkylene oxide to obtain a compound having the general formula (IV) ##STR4## wherein R.sub.1 and R.sub.2 are as above defined, R.sub.3 represents an alkyl group or a substituted alkyl group and R.sub.4 represents a hydrogen atom, an alkyl group or a substituted alkyl group; and hydrolyzing the compound having the general formula (IV) to obtain a compound having the general formula (V) ##STR5## wherein R.sub.3 and R.sub.4 are as above defined.
一种制备4-氨基-3-甲基-N-取代或未取代烷基苯胺的方法,包括使具有化学式(I)的4-氨基-3-甲基-硝基苯乙酰化和/或磺酰化,其中R.sub.1代表氢原子或酰基,R.sub.2代表酰基或磺酰基,或R.sub.1和R.sub.2可以组合为双官能团酰基;在金属氢化催化剂存在下用氢还原具有化学式(II)的化合物的硝基基团,其中R.sub.1和R.sub.2如上所定义;用从由烷基卤化物、取代烷基卤化物和烷氧基组成的群中选择的烷基化试剂烷基化具有化学式(III)的化合物的氨基团,其中R.sub.1和R.sub.2如上所定义,R.sub.3代表烷基或取代烷基,R.sub.4代表氢原子、烷基或取代烷基;水解具有化学式(IV)的化合物以获得具有化学式(V)的化合物,其中R.sub.3和R.sub.4如上所定义。