METHOD OF OBTAINING FURYLHETARYLMETHANES WITH THIENO[2,3-B]PYRIDINE FRAGMENT Russian patent published in 2009 - IPC C07D495/04 

FIELD: chemistry.

SUBSTANCE: invention concerns development of method of obtaining furylhetarylmethane derivatives of the general formula I applicable as semiproducts for obtainment of new polycyclic derivatives of thieno[2,3-b]pyridine. Method of obtaining furylhetarylmethanes with thieno[2,3-b]pyridine fragment of the general formula I involves forming furylhetarylmethane structure by alkylation of furane ring catalysed by acids; reaction is performed by boiling alcohols of 3-amino[2,3-b]pyridine and 2-methylfurane range in dioxane in the presence of 0.2-0.4 ml of acid catalyst, which is a mix of 70% perchloric acid, acetic anhydride and glacial acetic acid at the ratio of HClO₄:(CH₃CO₂)O:CH₃COOH=0.056:0.033:0.052 mol for 1.5-8 hours. It allows forming new heterocyclic system of furylhetarylmethanes with thieno[2,3-b]pyridine fragment by alkylation of 2-methylfurane by 2-hydroxy(phenyl)methyl-4,6-disubstituted-3-substituted carboxamidothieno[2,3-b]pyridines.

EFFECT: obtaining compounds applicable as semiproducts for obtainment of new polycyclic derivatives.

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