Abstract
A low-molecular weight analog of the vinyl chloride–maleic anhydride copolymer, chloromethylsuccinic anhydride gives rise to a new type of prototropic tautomerism, cyclic anhydride–enol, with formation of quasiaromatic enol and dienol derivatives. The ratio of the anhydride and enol tautomers in solution at room temperature is 7 : 1.
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