Fused Pyrimidine Systems: XVII. Imidazo- and Pyrimidopyrido[3,2-<Emphasis Type="Italic">d</Emphasis>]pyrimidin-4(3<Emphasis Type="Italic">H</Emphasis>)-ones |
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| Authors: | I V Dyachenko R I Vas’kevich A I Vas’kevich V V Polovinko M V Vovk |
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| Institution: | 1.Institute of Organic Chemistry,National Academy of Sciences of Ukraine,Kiev,Ukraine;2.“Igor Sikorsky Kyiv Polytechnic Institute” National Technical University of Ukraine,Kiev,Ukraine;3.“Enamin” Scientific Industrial Association,Kiev,Ukraine |
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| Abstract: | 2-(Allylamino)pyrido3,2-d]pyrimidin-4(3H)-one was converted to linearly fused dihydroimidazo- 1,2-a]pyrido3,2-d]pyrimidine on heating in polyphosphoric acid, whereas its reactions with molecular iodine and chlorosulfanylarenes afforded mainly angularly fused analogs. 2-(Cinnamylamino)pyrido3,2-d]pyrimidin- 4(3H)-one reacted with polyphosphoric acid and chlorosulfanylarenes to give linear pyrido3,2-d]pyrimido-1,2-a]pyrimidinones, and its iodocyclization led to the formation of angularly fused derivative. |
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