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Thomas, Lucie; Lutter, Ferdinand H.; Hofmayer, Maximilian S.; Karaghiosoff, Konstantin; Knochel, Paul (2018): Cobalt-Catalyzed Diastereoselective Cross-Couplings between Alkynylzinc Pivalates and Functionalized Cyclic Iodides or Bromides. In: Organic Letters, Vol. 20, No. 8: pp. 2441-2444
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Abstract

Various 1,2-, 1,3-, and 1,4-substituted cyclic iodides or bromides undergo highly diastereoselective cross-couplings (diastereoselectivity (dr) up to 99:1) with a range of alkynylzinc pivalates, using CoCl2 (20 mol %) and trans-N,N,N',N'-tetramethylcyclohexane-1,2-diamine as a catalytic system.