ISSN:
0947-3440
Keywords:
Acetophenone, α-formyl-2-hydroxy-
;
Condensation reaction, base-promoted
;
Chromones
;
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The title compound 1 undergoes cyclization and self-condensation in the presence of dil. NaOH yielding chromone (2) and/or 1-(3-chromonyl)-2-(2-hydroxybenzoyl)ethene (3). With benzaldehyde in the presence of piperidine in boiling ethanol, 1 reacts both by cyclization, and self-condensation combined with cyclization to give 2, 3 and bis(3-chromonyl-phenyl)methane (5). If less than 0.1 M aq. NaOH is used 1 and benzaldehyde produces 3-(α-hydroxybenzoyl)chromone (4) which can also be converted into 5.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jlac.1995199511286
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