2-Propenoic acid, 3-(4-formylphenyl)- → HCID 178456489, compound

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5,6-Diamino-1-methyl-3-propyl-2,4(1H,3Hpyrimidinedione was prepared freshly from 6-amino-1-methyl-5-nitroso-3-propyl-2,4(1H,3H)pyrimidinedione by ammonium sulfide reduction using the method of V. Papesch, M. Grove, and F. F. Schroeder (U.S. Pat. No. 2,602,795). This diamine (2.00 g, 10.0 mmol) was condensed with 4-formylcinnamic acid (1.76g, 10.0 mmol) by the procedure of Example 2 to give the title compound as an ivory powder, after crystallization from N,N-dimethylformamide-water; mp>300° C.

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