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Process for formation of base

  • US 4,981,965 A
  • Filed: 09/09/1988
  • Issued: 01/01/1991
  • Est. Priority Date: 09/09/1987
  • Status: Expired due to Term
First Claim
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1. A process for formation of a base comprising the step of heating a base precursor in the form of a salt of an organic base with a carboxylic acid which has such a property that the carboxyl group of the acid undergoes decarboxylation at a temperature of 50°

  • to 200°

    C., wherein the organic base is a diacidic to tetraacidic base having the following formula (II);

    
    
    space="preserve" listing-type="equation">R.sup.6 (--B).sub.n (II)wherein R6 is an n-valent residue of a hydrocarbon or a heterocyclic ring, the number of the carbon atoms contained in the organic base is not more than six times the number of the guanidine moieties, "n" is an integer of 2 to 4, and "B" is a monovalent group corresponding to an atomic group formed by removing one hydrogen atom from a compound having the following formula (I);

    ##STR28## wherein each of R1, R2, R3, R4 and R5 independently is a monovalent group selected from the group consisting of hydrogen, an alkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group, an aralkyl group, an aryl group and a heterocyclic group, each of which may have one or more substituent groups, and any two of R1, R2, R3, R4 and R5 may be combined together to form a five-membered or six-membered nitrogen-containing heterocyclic ring.

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