Arene extrusion as an approach to reductive elimination at boron: implication of carbene-ligated haloborylene as a transient reactive intermediate.

ABSTRACT: Herein, we report boron-centered arene extrusion reactions to afford putative cyclic(alkyl)(amino) carbene (CAAC)-ligated chloroborylene and bromoborylene intermediates. The borylene precursors, chloro-boranorbornadiene (ClB(C₆Me₆), 2^Cl) and bromo-boranorbornadiene (BrB(C₆Me₆), 2^Br) were synthesized through the reaction of the corresponding 1-halo-2,3,4,5-tetramethylborole dimer (XBC₄Me₄)₂ (X = Cl, 1^Cl; X = Br, 1^Br) with 2-butyne. Treatment of 2^Cl with CAACs resulted in the release of di-coordinate chloro-borylene (CAAC)BCl from hexamethylbenzene (C₆Me₆) at room temperature. In contrast, the reaction of 2^Br with CAAC led to the

SUBMITTER: Zhang C 

PROVIDER: S-EPMC11472773 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature