Methyl iodide → HCID 14638277, compound

Participants

Reaction Steps

Using the method of Sazonov, et al., Khimiya Geterotsiklicheskikh Soedinenii, 9, 1285-1288 (1972), 4-chloro-6,7-dihydro-2-methyl-8H-pyrimido[5,4-b ][1,4]oxazin-7-one was prepared. To a mixture of 8.0 g (0.0402 mole) of 4-chloro-6,7-dihydro-2-methyl-8H-pyrimido [5,4-b]1,4]oxazin-7-one and 17.9 ml of methyl iodide was added 8.75 g of 25% sodium methoxide in 250 ml of methanol, and the solution was heated at its reflux temperature for three hours. The solvent was removed by evaporation under vacuum, and the solid was separated by filtration, washed with water, and dried. The yellow solid was 4-chloro-6,7-dihydro-2,8-dimethylpyrimido[5,4-b][1,4]oxazin-7-one, m.p. 142°-143° C.

Provenance & Evidence