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Bipyrans for electrochemical studies. Preparation of polyene‐separated bipyrans and bithiopyrans
Author(s) -
Reynolds G. A.,
Chen C. H.
Publication year - 1981
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570180338
Subject(s) - chemistry , thiopyran , polyene , phosphonate , electrochemistry , medicinal chemistry , ion , pyran , organic chemistry , electrode
4,4′‐(But‐2‐ene‐1,4‐dienylidene)‐bi‐4 H ‐pyran and thiopyran derivatives were prepared by allowing the anion prepared from diethyl 4‐(2,6‐diphenyl‐4 H ‐pyranyI)phosphonate to react with 4‐pyranylidene butenaldehydes or the corresponding thiopyranylidene aldehydes. The oxidation potentials are compared of some bi‐4 H ‐pyrans and thiopyrans with zero, two, and four methenyl groups separating the heterocyclic nuclei.