Process for the preparation of aminodiphenylamine compounds
AssigneeCiba-Geigy Corporation
InventorGuido Jordine
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Abstract
The invention relates to a process for the preparation of compounds of formula ##STR1## wherein R.sub.1 is hydrogen, C.sub.1 -C.sub.4 alkyl or sulfo, and R.sub.2 is hydrogen or C.sub.1 -C.sub.4 alkyl, which process comprises reacting a compound of formula ##STR2## wherein Hal is halogen and R.sub.1 has the meaning given above, with a compound of formula ##STR3## wherein Y is a saponifiable group and R.sub.2 has the meaning given above, to give the compound of formula ##STR4## wherein R.sub.1, R.sub.2 and Y have the meanings given above, and saponifying the compound of formula (4) to give the compound of formula (1). The compounds of formula (1) are suitable for the synthesis of dyes.
Claims12
A process for the preparation of a compound of formula ##STR13## in an aqueous medium, wherein R.sub.1 is hydrogen, C.sub.1 -C.sub.4 -alkyl or sulfo, and R.sub.2 is hydrogen or C.sub.1 -C.sub.4 alkyl,
- which process comprises reacting a compound of formula ##STR14## wherein Hal is halogen and R.sub.1 has the meaning given above, with a compound of formula ##STR15## in the presence of an alkali metal hydroxide, an alkali metal carbonate or an alkaline earth metal oxide, wherein Y is a saponifiable group and R.sub.2 has the meaning given above, to give the compound of formula ##STR16## wherein R.sub.1, R.sub.2 and Y have the meanings given above, and saponifying the compound of formula (4) to give the compound of formula (1).
Dependencies are inferred from the claim text.