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A Novel Method for the Preparation of 3-Amino-4-hydroxybenzenesulfonamide Precursors of "Acid Alizarin Violet N" Derivatives
Journal article   Peer reviewed

A Novel Method for the Preparation of 3-Amino-4-hydroxybenzenesulfonamide Precursors of "Acid Alizarin Violet N" Derivatives

Alan R. Katritzky, Jing Wu, Stanislaw Rachwal, David Macomber and Terrance P. Smith
Synthetic communications, Vol.23(3), pp.405-417
01/02/1993
DOI: https://doi.org/10.1080/00397919308009795

Abstract

Chlorosulfonation of 2-nitroanisole gave 4-methoxy-3-nitrobenzenesulfonyl chloride (7) which was converted with N-butyl(3-phenylpropyl) amine into benzenesulfonamide (8). Hydrolysis of the ether and reduction of the nitro group of 8 followed by diazotization and coupling with 2-naphthol gave N-Butyl-N-(3-phenylpropyl)-4-hydroxy-3-(2-hydroxy-1-naphthyl) azobenzenesulfonamide (1d).

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