SYNTHESIS OF SULFOLANOPYRANOCHROMENONES BY THE REACTION OF 2-BENZYLIDENE-3-METHYL-4-NITRO-2,5-DIHYDROTHIOPHENE 1,1-DIOXIDES WITH 4-HYDROXYCOUMARIN

Abstract

A number of tetracyclic compounds with annulated nitrosulfolane and pyranochromenone rings were synthesized by reacting 2-benzylidene-3-methyl-4-nitro-2,5-dihydrothiophene 1,1-dioxides with 4-hydroxycoumarin. Structural features of the resulting polycyclic compounds were established on the basis of IR, ¹Н, ¹³С NMR, ¹Н–¹³С HMQC, ¹Н–¹³С HMBC, NOESY spectroscopy and X-ray structural analysis data.

Authors: Irina E. Efremova*, Igor I. Savelev, Ruslan I. Baichurin, Vladislav V. Gurzhiy