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Microwave Induced Selective Bromination of 1,4-Quinones and Coumarins

1996; Taylor & Francis; Volume: 26; Issue: 5 Linguagem: Inglês

10.1080/00397919608003692

1532-2432

Vandana Bansal, Saraswati Kanodia, Prakash Chander Thapliyal, Rajinder N. Khanna,

Synthesis and Reactions of Organic Compounds

Abstract Microwave irradiation accelerates the bromination of 1, 4-quinones and coumarins with (i) bromine adsorbed on neutral alumina in “dry media” and (ii) with iodine monobromide in acetic acid as compared to the reactions run at room temperature. Bromination takes place selectively at active quinonoid position in 1,4-quinones and at α, β-double bond in coumarins.