A synthesis of 2- and 4(5)-(2-pyridinyl)imidazoles by palladium-catalysed cross-coupling reactions
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Add time:08/12/2019 Source:sciencedirect.com
N-Substituted imidazolylzinc chlorides were reacted with 2-bromopyridine in the presence of Pd(PPh3)4 and a two-fold excess of ZnCl2 to afford cross-coupled products in 58–93% yields. Deprotection provided convenient routes to 2- or 4(5)-(2-pyridinyl)imidazoles.
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