Two-Step Synthetic Approach to 6-Substituted Pyrido[2,3-d]pyrimidine(1H,3H)-2,4-diones from 6-Amino-, 6-Alkylamino-, and 6-Arylamino-1,3-dimethyluracils
Key words: Cyclization, 6-Amino-1,3-dimethyluracil, Mannich Bases, Pyrido[2,3-d]pyrimidines, Ene Reaction
K. Bischoff, U. Girreser, D. Heber, and M. Schütt
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