Method for producing carbonyl dimidazoles

Method for producing carbonyl dimidazoles

  • CN 1,308,613 A
  • Filed: 07/06/1999
  • Published: 08/15/2001
  • Est. Priority Date: 07/08/1998
  • Status: Abandoned Application
First Claim
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1. one kind prepares the carbonyl dimidazoles with general formula I a, Ib, Ic or the method for its mixture:

  • R wherein 1Be hydrogen atom or C 1-4-alkyl and R 2Be hydrogen atom or methyl, this method is with at least a imidazoles with general formula I Ia and IIb;

    R wherein 1And R 2Have above-mentioned implication, in inert solvent, react, it is characterized in that, in this reaction mixture, add pK based on the stoichiometric quantity of imidazoles with phosgene bValue is lower than the alkaloid of imidazoles.

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