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Note | Regular issue | Vol 55, No. 9, 2001, pp.1805-1812
Published online, 1st January, 1970
DOI: 10.3987/COM-01-9265
Microwave and BF3 Promoted Rearrangement of Allyloxycoumarins to Allylcoumarins and Dihydrofurocoumarins

Mohammad R. Saidi* and Fatemeh Rajabi

*Department of Chemistry, Sharif University of Technology, P.O. Box 11356-9516, Tehran, Iran


Allyl, crotyl, methallyl and cinamyl ethers of 4-hydroxy-, 7-hydroxy-, and 4-methyl-7-hydroxycoumarins have been efficiently synthesized and rearranged to substituted allylcoumarins under microwave irradiation. Irradiation of allylcoumarins in the presence of BF3/ether directly produced substituted dihydrofurocoumarins in good yields.