Helvetica Chimica Acta

Derivate des 5, 6??Dihydro??p??dithiin??2, 3??dicarbonsäure??anhydrids, I: Imide

HR Schweizer

Index: Schweizer,H.R. Helvetica Chimica Acta, 1969 , vol. 52, p. 2221 - 2235

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Citation Number: 10

Abstract

Abstract 5. 6-Dihydro-p-dithiin-2. 3-dicarboxylic anhydride reacts with primary amines quite readily to form the substituted imides. The imide formation occurs much more easily than with maleic or phthalic anhydride. The imide and all N-substituted imides have a fairly strong, bright yellow colour. Their absorption spectra differ considerably from those of the anhydride, ester and dinitrile. Electron-attracting substituents on the imide nitrogen ...