Diphenyl Ether → HCID 59823061, compound

Participants

Reaction Steps

3-Methyl-6-(methylamino)pyrimidin-4(3H)-one (compound 1B; 400 mg, 2.88 mmol, 1 eq), diethyl malonate (873 μl, 5.76 mmol, 2 eq) and phenyl ether (915 μl, 5.76 mmol, 2 eq) were dissolved in 1-methyl-2-pyrrolidinone (2 ml, 20 mmol). The mixture was placed in a microwave reactor at 240° C. for 30 minutes to yield 5-hydroxy-3,8-dimethylpyrido[2,3-d]pyrimidine-4,7(3H,8H)-dione (compound 1C). The product was confirmed by LC-MS and isolated by HPLC to give 125 mg (21%) of compound 1C. [M+H] calc'd for C9H9N3O3, 208; found, 208.

Provenance & Evidence