| 摘要 |
PROBLEM TO BE SOLVED: To provide a diazo heat-sensitive recording material of purple- cyanogen coloring type provided with image shelf stability and image fixation properties. SOLUTION: A pyrrolo [1, 2-a] pyrimidine compound represented by the formula (In the formula, R<1> -R<4> represent respectively hydrogen atom, halogen atom, aryl, alkyl, cyano, acyl, substituted carbamoyl, alkoxycarbonyl, aryloxycarbonyl, acyloxy, alkoxy, aryloxy, alkylthio, arythio, substituted sulfamoyl, alkyl sulfonyl, aryl sulfonyl, alkyl phosphoryl, aryl phosphoryl or substituted amino.) is contained as a coupler in a heat-sensitive recording material with a heat-sensitive recording layer containing diazonium salt compound and a coupler. |
