Synthesis of New Polycyclic Compounds Containing Thieno[2′,3′:5,6]pyrimido[2,1- a ]isoindole Fragment
RUSSIAN JOURNAL OF GENERAL CHEMISTRY(2021)
Abstract
The reaction of partially saturated derivatives of 3-aminothieno[2,3- b ]pyridine-2-carboxamide with phthalic anhydride in acetic acid or DMF on heating leads to the formation of thieno[2′,3′:5.6]pyrimido[2,1- a ]isoindole derivatives fused with a pyridine or quinoline core. One of the obtained compounds shows a pronounced UV fluorescence.
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Key words
thieno[2,3-b]pyridines,thieno[2,3-b]quinolines,acylation,heterocyclization,phthalic anhydride
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