反应详情

Using the procedure of Example 80, except that 1-bromoethane was used instead of methyl iodide, 4-chloro-6,7-dihydro-2-ethyl-8H-pyrimido [5,4-b][1,4]oxazin-7-one was alkylated providing 4-chloro-2,8-diethyl-6,7dihydropyrimido [5,4-b][1,4]oxazin-7-one.