PHOTOCHEMICAL-TRANSFORMATIONS IN 1-(O-HYDROXYARYL)-1,3-DIKETONES

Authors
GARG S ISHAR MPS SARIN R GANDHI RP
Citation
S. Garg et al., PHOTOCHEMICAL-TRANSFORMATIONS IN 1-(O-HYDROXYARYL)-1,3-DIKETONES, Indian journal of chemistry. Sect. B: organic chemistry, including medical chemistry, 33(12), 1994, pp. 1123-1128
Citations number
30
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Indian journal of chemistry. Sect. B: organic chemistry, including medical chemistry → ACNP
ISSN journal
03764699
Volume
33
Issue
12
Year of publication
1994
Pages
1123 - 1128
Database
ISI
SICI code
0376-4699(1994)33:12<1123:PI1>2.0.ZU;2-Q
Abstract
Irradiation (using pyrex glass filter) of o-hydroxybenzoylacetophenone (1a), o-hydroxybenbzoylacetone (1b), 2-hydroxy-1-naphthoylacetophenon e (5a), 2-hydroxy-1-naphtloylacetone (5b) and 1-hydroxy-2-naphthoylace tone (9) in Br2/CHCl3 and I2/MeOH solutions leads to various chromone derivatives. Parallel reactions of these 1,3-diketones in the dark rec ord no perceptible change in them. Enhanced photoenolisation of the di ketones, in the presence of bromine or iodine, is deemed to be the key step in these transformations.