SYNTHESIS OF 2-SUBSTITUTED-4H-PYRIDO[2,3-h]BENZOXAZIN-4-ONES AND 2-SUBSTITUTED PYRIDO[2,3-h]-QUINAZOLIN-4(3H)ONES
作者:T. Aruna Kumari、P. Jayaprasad Rao
DOI:10.1081/scc-120005995
日期:2002.1
ABSTRACT The reaction of 2-substituted-4H-pyrido[2,3-h]benzoxazin-4-ones (1) with hydrazine hydrate resulted in 2-substituted-3-aminopyrido[2,3-h]quinazolin-4(3H)ones (2) and not in the corresponding 3. The Schiffbases (4) of 2 on pyrolysis led to 2-substituted pyrido[2,3-h]quinazolin-4(3H)ones (5).