Reaction of 4-R-2-phenyltetrahydrobenzo[b]pyrylium and 9-R-sym-octahydroxanthylium salts with furfural and related compounds |
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| Authors: | D. R. Sharafutdinov E. V. Kapitonova S. K. Klimenko |
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| Affiliation: | (1) Saratovorgsintez, Saratov, 410059, Russia;(2) Institute of Veterinary Medicine and Biotechnology, N. I. Vavilov Saratov State Agrarian University, Saratov, 410001, Russia |
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| Abstract: | The condensation of furfural, 5-methylfurfural, and 2-thiophenecarbaldehyde with 4-R-2-phenyltetrahydrobenzo[b]pyrylium and 9-R-sym-octahydroxanthylium salts was studied. Condensation conditions under which acidophobic aldehydes of the furan series do not undergo resinification were found. 8-Furfurylidene and 8-thenylidene derivatives of 4-R-2-phenyltetrahydrobenzo[b]pyrylium and bisfurfurylidene and bisthenylidene derivatives of 9-R-sym-octahydroxanthylium salts were obtained for the first time. __________ Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1160–1165, August, 2008. |
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| Keywords: | 5-methylfurfural 9-R-1,8-bis[thenylidene]-sym-octahydroxanthylium and 9-R-1,8-bis-[R1-furfurylidene]-sym-tetrahydrobenzo[b]pyrylium 9-R-sym-octahydroxanthylium and 4-R-2-phenyltetrahydrobenzo[b]pyrylium 4-R1-2-phenyl-8-thenylidenetetrahydrobenzo[b]pyrylium and 4-R-2-phenyl-8-(R1-furfurylidene)tetrahydrobenzo[b]pyrylium salts thiophenecarbaldehyde furfural condensation |
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