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Showing 1 to 3 of 3 for “"Sulphonic acids"”.

  1. Quarternisation of Benzothiazoles and 1,2,3 - Benzothiadiazoles

    … that esters of nitro-substituted benzenesulphonic acids (particularly 2,4-dinitrobenzene-sulphonates) would be most suitable for preparing higher alkyl- 1,2,3-benzothiadia7olium salts . The methods which have been used to prepare alkyl esters of aromatic sulphonic acids are reviewed. …

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