Synthesis of 3-Phenylbenzo[g][1]Benzopyrano[4,3-e]Indazol-8(3H)-Ones and Benzo[b]Phenanthro[9,10-d]Pyran-9-Ones by Photooxidation of 3-Aryl-4-(1-Phenyl-1H-Pyrazol-4-YL)Coumarins and 3,4-Diarylcoumarins
- 1 April 1988
- journal article
- research article
- Published by Taylor & Francis in Synthetic Communications
- Vol. 18 (6) , 639-649
- https://doi.org/10.1080/00397918808064023
Abstract
3-Aryl-4-(1-phenyl-1H-pyrazol-4-yl) coumarins (4) and 3,4-diarylcoumarins (5) were synthesised by reaction of 1-phenyl-4-(2′-hydroxybenzoyl) pyrazoles (1) and 2-hydroxybenzophenone (2) respectively with arylacetyl chlorides (3) under Phase Transfer Catalysis conditions. These Coumarins 4 & 5 were further subjected to photooxidation to give title compounds 6 & 7.Keywords
This publication has 11 references indexed in Scilit:
- Synthesis of 3-Arylcoumarins, 2-Aroylbenzofurans and 3-Aryl-2H-1,4-benzoazines Under Phase-Transfer Catalysis ConditionsSynthetic Communications, 1987
- Studies on antianaphylactic agents—ITetrahedron, 1974
- Photolysis of 4,5-diphenyl-oxazoles, -thiazoles, and -imidazoles. Formation of phenanthro[9,10-d]-heterocyclic systemsJournal of the Chemical Society D: Chemical Communications, 1969
- Photochemistry of thiophenes. IV. Scope of arylthiophene rearrangementsJournal of the American Chemical Society, 1967
- Ground-State and Photochemical Reactions in the Epoxypyrone Series1-3Journal of the American Chemical Society, 1966
- The photocyclization of anils to phenanthridinesTetrahedron Letters, 1965
- 1159. Synthesis of methyl derivatives of naphtho[2,1-b]thiophen and 11-thiabenzo[a]fluorene by photocyclisation of stilbene isostersJournal of the Chemical Society, 1965
- Photochemische Reaktionen. 8. Mitteilung. Lichtkatalysierte Cyclodehydrierung von 1,2‐Diaryläthylenen und AzobenzolHelvetica Chimica Acta, 1960
- Illumination of cis- and trans-Stilbenes in Dilute SolutionsJournal of the American Chemical Society, 1955
- 3,4-DIARYLCOUMARINSThe Journal of Organic Chemistry, 1954