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Selective ligand displacement of the cod ligand in Ru(cod)(cot) (1) [cod: 1,5-cyclooctadiene, cot: 1,3,5-cyclooctatriene] with trimethylphosphine gives fac-Ru(6-η1:1-3-η3-C8H10)(PMe3)3 (3) in benzene at 50 °C.

Successive O−C and sp3 C−H bond activation occurs in the reaction of Ru(COD)(COT) (1)/PMe3 with allyl 2,6-xylyl ether to (4). Alternatively, 4 can be obtained by O−H and sp3 C−H bond activation in 2,6-xylenol by 1/PMe3. In both cases, an η3-allyl fragment could be responsible for the sp3 C−H bond activation.

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