The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 22, 1977
Filed:
Oct. 10, 1974
Shiro Kimura, Tokyo, JA;
Hideo Nagasawa, Tokyo, JA;
Yasuo Kato, Tokyo, JA;
Yasuyoshi Nakamura, Tokyo, JA;
Shoji Miki, Tokyo, JA;
Yumiko Ishikawa, Tokyo, JA;
Sanko Chemical Company Ltd., Tokyo, JA;
Abstract
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.