Pd(OAc) 2 -mediated dehydrogenation of an alkyl group to a double bond or a η 3 -allylic complex via sp 3 C−H bond activation and allylic oxidation is reported. A novel redox is proposed for this double oxidation under oxidant-free conditions. A catalytic protocol using benzoquinone as the stoichiometric oxidant has also been developed for the dehydrogenation of cyclopentylcarboxamides.
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Giri et al. (2008) studied this question.