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Paper | Regular issue | Vol 43, No. 4, 1996, pp.809-816
Published online, 1st January, 1970
DOI: 10.3987/COM-95-7362
Transformations of Some 3-Benzamido-2,5-dioxo-5,6,7,8-tetrahydro-2H-1-benzopyrans with Nucleophiles

Polonca Trebse, Slovenko Polanc, Marijan Kočevar*, and Tomaz Solmajer

*Faculty of Chemistry and Chemical Technology, University of Ljubljana, Askerceva 5, 61000 Ljubljana, Slovenia


Transformation of 3-benzamido-2,5-dioxo-5,6,7,8-tetrahydro-2H-1-benzopyrans (1-3) to the corresponding quinolin-2(1H)-ones (4-18) with nitrogen-containing nucleophiles (amines and hydrazines) under various conditions is described. In order to clarify the observed results, heats of formation of possible product pairs were calculated.