

SYNTHESIS OF SULFOLANOOCTAHYDROCHROMENONES FROM 2-BENZYLIDENE-3-METHYL-4-NITRO-2,5-DIHYDROTHIOPHENE 1,1-DIOXIDES

Abstract
The reactions of 2-benzylidene-3-methyl-4-nitro-2,5-dihydrothiophene 1,1-dioxides with dimedone were used to synthesize a series of tricyclic compounds containing fused nitrosulfolane and octahydrochromenone rings. The structural features of the obtained polycyclic compounds were established on the basis of IR and NMR spectra, as well as X-ray structural analysis.
Keywords
2-benzylidene-3-methyl-4-nitro-2,5-dihydrothiophene 1,1-dioxides; enolizable cyclic СН acids; sulfolenes; tandem process.
Latvian Institute of Organic Synthesis - Aizkraukles iela, 21, Riga, LV-1006, Latvia - hgs@osi.lv