N-Substituted halogenomethyleneindoxyls

Details N-Substituted halogenomethyleneindoxyls N-Substituted halogenomethyleneindoxyls

1978-02-09

1981-04-07

Daus, Donald G.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

26032613F, C07B20918

Patent

active

042605458

ABSTRACT:
Novel N-substituted halogenomethyleneindoxyls [N-substituted halogeno-(3-oxa[2H]indol-2-ylidene)-acetic acids] and a novel process for their preparation by reacting N-substituted anilides with dihalogenomaleic anhydrides or derivatives thereof are described. The novel N-substituted halogenomethyleneindoxyls are valuable intermediates for the preparation of pharmaceutical active compounds having an antiallergic action.

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