Heterocycles [h]-Fused onto 4-Oxoquinoline-3-carboxylic Acid. Part X [1]. Synthesis and X-Ray Structure of a Model 4- Oxo[1,4]benzoxazepino[2,3-h]quinoline-3-carboxylic Ester
作者:Batool A. Farrayeh、Mustafa M. El-Abadelah、Jalal A. Zahra、Salim F. Haddad、Wolfgang Voelte
DOI:10.5560/znb.2013-2270
日期:2013.2.1
7-chloro-8-nitro-4-oxoquinoline-3- carboxylate (2) delivered the respective 7-(2-formyl-phenoxy)-8-nitro-4-oxoquinoline-3-carboxylic ester 3. Reductivecyclization of 3 furnished the corresponding 4-oxo-[1,4]benzoxazepino[2,3- h]quinoline-3-carboxylic ester 5. Acid-catalyzed hydrolysis of the esters 3/5 produced the respective acids 4/6. Structural assignments for the new compounds 3 - 6 are supported by microanalytical