56891-62-4Relevant articles and documents
Process for preparing 4-amino-3-methyl-N-substituted or unsubstituted alkylanilines
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, (2008/06/13)
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 R1 represents a hydrogen atom or an acyl group, R2 represents an acyl group or a sulfonyl group, or R1 and R2 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 R1 and R2 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 R1 and R2 are as above defined, R3 represents an alkyl group or a substituted alkyl group and R4 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 R3 and R4 are as above defined.
