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Condensation of β ‐cyclocitral with benzaldehyde
Author(s) -
Frank Arlen W.
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.5570180322
Subject(s) - benzaldehyde , chemistry , aldehyde , condensation , catalysis , base (topology) , organic chemistry , medicinal chemistry , mathematical analysis , physics , mathematics , thermodynamics
β‐Cyclocitral 1b condenses with benzaldehyde in the presence of base catalysts giving the 2‐benzopyrans 4, 5 and 6 , and in the presence of acid catalysts giving exclusively the aldehyde 7 . The cyclocitrals 1a and 1b are both isomerized by strong base anion exchange resins, but their aldehyde‐protected derivatives 2 and 3 are not. Some tests used to characterize the aldehydes and their condensation products are described.