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■ The Preparation of 1-Methyl- (and Ethyl)-1,4-dihydro-4-oxo- and 4-thioxo-3-quinolinesulfonamides from 4-Amino-3-quinolinesulfonamides

Leszek Skrzypek

*Department of Organic Chemistry, Sileaian School of Medicine, Jagiellonska Str. 4, 41-200 Sosnowiec, Poland

Abstract

Basic hydrolysis of 1-methyl or 1-ethyl-4-amino-3-aminosulfonylqui- nolinium alkyl sulfates (4) obtained from 4-amino-3-quinolinesulfonamides (2) yields 1-methyl- and 1-ethyl-1,4-dihydro-4-oxo-3-quinolinesulfonamides (5). Salts (4) reacted with sodium hydrosulfide to give sulfur analogs of the compounds (5), i.e., 1-alkyl-1,4-dihydro-4-thioxo-3-quinolinesulfonamides (7).