Sol??Gel Entrapped Pyridinium Hydrobromide Perbromide as a Recyclable Bromination Agent: Its Application to a One??Pot Bromination and Dehydrobromination …

…, K Hamza, R Abu??Reziq, J Blum

Index: Levin, Yevgenia; Hamza, Khalil; Abu-Reziq, Raed; Blum, Jochanan European Journal of Organic Chemistry, 2006 , # 6 p. 1396 - 1399

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Citation Number: 11

Abstract

Abstract Silica sol-gel encaged pyridinium hydrobromide perbromide can be used for clean, odorless bromination of a variety of substrates, including alkenes, ketones, and arenes. The used heterogenized bromination reagent can be recharged with bromine and recycled. In the presence of sol-gel entrapped 1, 5, 7-triazabicyclo [4.4. 0] dec-5-ene, dibromides are dehydrobrominated to give vinyl monobromides and/or alkynes. Encapsulation of the ...