Nitrogen bridgehead compounds. Part 85 [1]. Synthesis and reactivity of 3,4-dihydro-1H,6H-[1,4]oxazino[3,4-b]quinazolin-6-ones

Article abstract of DOI:10.1002/jhet.5570300539

3,4-Dihydro-1H,6H-[1,4]oxazino[3,4-b]quinazolin-6-one 3 and its 1-methyl and 1-hydroxy derivatives 8 and 13 were prepared by different routes. The active methylene group of compound 3 was reacted with electrohilic reagents (bromine, phenyldiazonium chlori