Li+-Mediated B[BOND]C Cross-Coupling

Authors

  • David Olid,

    1. Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la U.A.B., E-08193 Bellaterra (Spain), Fax: (+34) 93-580-57-29
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  • Prof. Dr. Clara Viñas,

    1. Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la U.A.B., E-08193 Bellaterra (Spain), Fax: (+34) 93-580-57-29
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  • Prof. Dr. Francesc Teixidor

    Corresponding author
    1. Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la U.A.B., E-08193 Bellaterra (Spain), Fax: (+34) 93-580-57-29
    • Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la U.A.B., E-08193 Bellaterra (Spain), Fax: (+34) 93-580-57-29
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Abstract

original image

Easy as A, B[BOND]C: B[BOND]C cross-coupling on [3,3′-Co(8-I-1,2-C2B9H10)(1′,2′-C2B9H11)], [1], the best specimen of metallacarboranes, is easily produced in a reaction mediated by Li+ in the absence of a transition-metal catalyst (see figure). Pure RLi or a mixture of Li reagents (tBuLi+RLi) is adequate to produce the B[BOND]C bond. Notably, a threshold of RLi (or tBuLi+RLi)/[1], 2:1, is required to initiate the B[BOND]C coupling, which acts, at least in part, as a source of soluble Li+.

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