Synthesis and structure of novel organocycloborates

H Braunschweig, G D'Andola, T Welton…

Index: Braunschweig, Holger; D'Andola, Giovanni; Welton, Tom; White, Andrew J. P. Chemistry - A European Journal, 2006 , vol. 12, # 2 p. 600 - 606

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Citation Number: 27

Abstract

Abstract A series of α, ω-boryl (bromo) alkanes of the general formula R 2 B [BOND](CH 2) n [BOND] Br (n= 3, 4, 5, 6) was obtained in high yield following a standard hydroboration protocol. Upon treatment with Mg turnings and formation of the respective Grignard species, all alkanes with n= 4 to 6 underwent an unprecedented boron-centered cyclisation reaction with formation of boratacyclopentanes,-hexanes, and-heptanes, respectively. All new ...