Add time:07/18/2019         Source:sciencedirect.com

trans-β-Bromostyrenes have been conveniently prepared in moderate to high yield in a one-pot two-step sequence.trans-1,2-Bis(tri-n-butylstannyl)ethylene underwent a smooth palladium(0) catalyzed coupling reaction with 0.5 equivalents of aromatic bromide or iodide to furnish atrans-β-stannylstyrene. This intermediate vinyl stannane, without isolation, was then converted to the substitutedtrans-bromostyrene on treatment with molecular bromine.

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