Process for formation of base
First Claim
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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Accused Products
Abstract
A base precursor in the form of a salt of an organic base with a carboxylic acid is disclosed. The organic base is a diacidic to tetraacidic base which is composed of two to four guanidine moieties and at least one linking group for the guanidine moities. The organic base is such a hydrophilic compound that the number of carbon atoms contained in the organic base is not more than six times the number of the guanidine moieties. The linking group is a residue of a hydrocarbon or a heterocyclic ring. The guanidine moiety corresponds to an atomic group formed by removing one or two hydrogen atoms from a compound having the following formula (I): ##STR1## where each of R1, R2, R3, R4 and R5 independently is hydrogen, an alkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group, an aralkyl group, an aryl group or 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. A process for formation of an organic base from the base precursor and a light-sensitive material containing the base precursor are also disclosed.
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Citations
12 Claims
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- to 200°
Specification