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Simply complex: The title reaction proceeds at a low loading of catalyst (1 mol %) and allows an efficient and stereoselective access to the hydroazulenic motif, which is found in numerous natural products having significant biological activities. Tf=trifluoromethanesulfonyl, XPhos=2-dicyclohexylphosphino-2′,4′,6′-triisopropylbiphenyl.
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Cao et al. (2013) studied this question.
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