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, Terrance P. Smith

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

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- l-naphthyl)azobenzenesulfonamide (1d).

Original languageEnglish (US)
Pages (from-to)405-417
Number of pages13
JournalSynthetic Communications
Volume23
Issue number3
DOIs
StatePublished - Feb 1 1993

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