Lithium Perchlorate and Lithium Bromide Catalysed Solvent Free One Pot Rapid Synthesis of 3-Carboxycoumarins under Microwave Irradiation
- 1 January 2002
- journal article
- research article
- Published by SAGE Publications in Journal of Chemical Research
- Vol. 2002 (1) , 40-41
- https://doi.org/10.3184/030823402103170402
Abstract
Reaction of 2-hydroxy or 2-methoxy substituted benzaldehydes or acetophenones with Meldrum's acid in the presence of a catalytic amount of LiClO4 or LiBr without solvent under microwave irradiation afforded 3-carboxycoumarins in excellent yields.Keywords
This publication has 14 references indexed in Scilit:
- Solvent-free synthesis of 3-carboxycoumarinsGreen Chemistry, 2000
- Solid phase synthesis of substituted coumarin-3-carboxylic acids via the Knoevenagel condensationTetrahedron Letters, 1998
- Enolether, XVIII Eine einfache Synthese von CumarinenEuropean Journal of Inorganic Chemistry, 1987
- Synthesis and study of substituted coumarins. A facile preparation of D,L‐o‐tyrosineJournal of Heterocyclic Chemistry, 1986
- A Novel and Convenient Synthesis of Substituted CoumarinsSynthesis, 1986
- A Convenient Synthesis off Coumarins by Denitro-cyclizationSynthesis, 1986
- A One Step General Synthesis of 3-Substituted CoumarinsSynthetic Communications, 1984
- Ketocoumarins as photosensitizers and photoinitiatorsPolymer Engineering & Science, 1983
- New syntheses of coumarinsThe Journal of Organic Chemistry, 1982
- KetocoumarinsTetrahedron, 1982