Applications of a novel carbon-nitrogen bond cleavage reaction (part I). A new synthesis / derivatisation of 5H-indeno[1,2d] pyrimidines and pyrimido[6,1-a]isoindoles.
作者:Bansi Lal、Ramesh M. Gidwani
DOI:10.1016/s0040-4020(01)80524-x
日期:1993.1
presence of a mixture of formic acid and orthophosphoric acid, to give 5H-indeno[1,2-]pyrimidines () and/or pyrimido[6,1-]isoindoles (). Cyclization to and/or depends on the nature of substitution in the pyrimidine ring in . Electron withdrawing groups at position 4 in favour the formation of the skeleton , however, electron donating groups gave more of . Compound on acidtreatment, gave in addition to , a