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.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1160–1165, August, 2008.
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Sharafutdinov, D.R., Kapitonova, E.V. & Klimenko, S.K. Reaction of 4-R-2-phenyltetrahydrobenzo[b]pyrylium and 9-R-sym-octahydroxanthylium salts with furfural and related compounds. Chem Heterocycl Comp 44, 931–935 (2008). https://doi.org/10.1007/s10593-008-0133-2
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DOI: https://doi.org/10.1007/s10593-008-0133-2
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