Highly brominated biphenylenes as precursors for the convenient synthesis of 5, 6, 8, 10-tetrabromobenzocyclooctene

…, O Cakmak, M Karakas, A Onal, S Ide

文献索引：Tutar, Ahmet; Cakmak, Osman; Karakas, Mehmet; Onal, Adem; Ide, Semra Journal of Chemical Research, 2004 , # 8 p. 545 - 549

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被引用次数: 3

摘要

An efficient synthesis is described of hexabromides 5 and 6 by photobromination of biphenylene (1). Double dehydrobromination of hexabromides 5 and 6 with t-BuOK affords 5, 6, 8, 10-tetrabromobenzocyclooctene (7) in nearly quantitative yield. The tetrabromide 7 is a valuable precursor for the preparation of functionalised substituted benzocyclooctenes (benzo [8] annulenes).