Synthesis and stereochemical structure of derivatives of 2-substituted 3-cyclohexenylamidoquinazolin-4-ones obtained from N′-cyclohexenecarbonyl-substituted hydrazides of 2-aminobenzoic acid and certain orthoesters
In the reaction of N'-cyclohexenecarbonyl-substituted hydrazides of 2-aminobenzoic acid with the trialkyl esters of formic, acetic, valeric, and benzoic acids at room temperature 3-cyclohexenylamidoquinazolin-4-ones with the respective substituent at the C-2 atom of the quinazoline ring were obtained. The spatial structure of the obtained compounds was studied by homonuclear and heteronuclear NMR.
Synthesis of Novel 4-Aminotetrahydropyrrolo[1,2-a]quinazoline Derivatives
作者:D. Zicāne、Z. Tetere、I. Rāviņa、M. Turks
DOI:10.1007/s10593-013-1248-7
日期:2013.5
Decarboxylation of substituted monohydrazides of 6-arylcyclohex-3-ene-1,1-dicarboxylic acids proceeds stereospecifically and leads to 1,6-cis-disubstituted cyclohex-3-enes. Due to the presence of the anthranilic acid moiety these decarboxylated hydrazides undergo formation of pyrrolo[1,2-a]quina-zolines when treated with 2-oxoglutaric acid. The present paper describes the first example of chemoselective synthesis of amide-linked conjugates between the cyclohexene moiety and tetrahydro-pyrrolo[1,2-a]quinazolines.