A convenient synthesis of 3, 4??dihydro??2??methyl??3??oxo??2H??1, 4??benzoxazine??2??carboxylic acids and 3, 4??dihydro??2??methyl??3??oxo??2H??pyrido [3, 2??b]??1, 4??oxazine …
E Suhadolc, UŠ Urleb, U Žbontar…
文献索引：Kikelj; Suhadolc; Urleb; Zbontar Journal of Heterocyclic Chemistry, 1993 , vol. 30, # 3 p. 597 - 602
Abstract A convenient one pot synthesis of ethyl 3, 4-dihydro-2-methyl-3-oxo-2H-1, 4- benzoxazine-2-carboxylates and 3, 4-dihydro-2-methyl-3-oxo-2H-pyrido [3, 2-b]-1, 4- oxazine-2-carboxylates and their conversion into the respective carboxylic acids are described.
