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Na Wu, Lujiang Deng, Lianzhu Liu, Qi Liu, Prof. Chuangchuang Li and Prof. Zhen Yang Reverse Regioselectivity in the Palladium(II) Thiourea Catalyzed Intermolecular Pauson–Khand Reaction Chemistry – An Asian Journal 8

Version of Record online: 19 OCT 2012 | DOI: 10.1002/asia.201200783

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Which way? Palladium thiourea catalyzed Pauson–Khand reaction of norbornene with substituted alkynoates to afford selectively either α-carboxylated adducts or β-carboxylated adducts with the reverse regioselectivity has been demonstrated for the first time. Control of the regioselectivity in this transformation is governed by the addition of LiCl. A mechanistic interpretation to account for this observed regioselectivity is presented.

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