Hydrochloric Acid → 2-amino-6-(2-methylphenyl)-8-methyl-pyrido[2,3-d]pyrimidin-7(8H)-one

Participants

Reaction Steps

To a mixture of 6-(2-methylphenyl)-7-imino-8-methyl-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamine (0.30 g) from Example 8 and concentrated HCl (0.6 mL) was added water (11 mL). The reaction mixture was refluxed for 20 hours, then allowed to cool to room temperature. The white precipitate from the reaction mixture was filtered and washed with water. The product was dried in vacuo to give 0.21 g of 2-amino-6-(2-methylphenyl)-8-methyl-pyrido[2,3-d]pyrimidin-7(8H)-one; mp 239°-241° C.

Provenance & Evidence