A Novel and Expedient Approach to New Thiazoles Thiazolo32-apyridines Dihydrothiophenes and Hydrazones Incorporating Thieno23-bthiophene Moiety

摘要

This paper reports details about the synthesis of a series of novel functionalized symmetrical bis-heterocyclic compounds containing a thieno[2,3-b]thiophene motif. Bis-thiazole derivatives >2, >3a-c and thiazolo[3,2-a]pyridine derivatives >4a-c are achieved. The hitherto unknown dihydrothiophene derivatives >6a-d via bis-pyridimium salt >5 are obtained. Additionally, the novel hydrazonothieno[2,3-b]thiophene derivatives >10a-c are obtained via bis-tosylacetylthieno[2,3-b]thiophene derivative >9. All compounds are characterized by ¹H-, ¹³C-NMR, GCMS, IR, and UV-vis spectrometry. These compounds represent a new class of sulfur and nitrogen containing heterocycles that should also be of interest as new materials.