Synthesis of several 7 8-dihydro-6H-pyrimido 5 4-b 1 4 oxazin-6-ones

چکیده مقاله

A new and an efficient route has been developed for the synthesis of pyrimido [4,5-b] [1,4]oxazines by treating 5-bromo-2,4-dichloro-6-methylpyrimidine with several amino acids such as alanine, phenyl