C 75 Construction of Heteroacenes with Fused Thiophene and Pyrrole Rings via the Fischer Indolization Reaction [Electronic resource] / R. A. Irgashev, A. A. Karmatsky, G. L. Rusinov, V. N. Charushin // Organic Letters. - 2016. - Vol. 18, № 4. - С. 804-807 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): FUSED THIOPHENE -- PYRROLE RINGS -- FISCHER INDOLIZATION REACTION Аннотация: A convenient approach to ladder-type 6H-benzo[4',5']thieno[2',3':4,5]thieno[3,2-b]indoles, e.g., I (X-rays single crystal structure shown), bearing various substituents in both terminal benzene rings has been developed. The protocol suggested for prepg. these N,S-heteroacenes is based on using easily available reagents, such as cinnamic acids and arylhydrazines, which can be involved in the Fischer indole synthesis, as the key step. A similar condensed system of 12H-benzo[4'',5'']thieno[2'',3'':4',5']thieno[2',3':4,5]thieno[3,2-b]indole, bearing six rings, has also been obtained. \\\\expert2\\nbo\\Organic Letters\\2016, v.18, N 4, p.804-807,pdf.pdf |