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Condensation with crotonaldehyde gives 2,4-dioxo-6-methylpyrido[3,2-d]pyrimidine: J. Chem. Soc. (C), 1745 (1967). An improved procedure has been used in synthesis of inhibitors of human thymidylate synthase: J. Med. Chem., 27, 1710 (1984), and of dihydrofolate reductases: J. Med. Chem., 39, 1836 (1996):/n
Review of the use of uracils as starting materials in heterocyclic synthesis: Adv. Heterocycl. Chem., 55, 130 (1992)./n
Hazard Statements: H301
Toxic if swallowed.
Precautionary Statements: P260-P201-P280-P304+P340-P405-P501a
Do not breathe dust/fume/gas/mist/vapours/spray. Obtain special instructions before use. Wear protective gloves/protective clothing/eye protection/face protection. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.