10.1021/ol801728f.s001 David Nečas David Nečas Martin Kotora Martin Kotora Ring Opening of Methylenecycloalkenes via the C−C Bond Cleavage American Chemical Society 2008 Ni sequence intramolecular deallylation diene mixture species Methylenecycloalkene rearrangement ambient conditions Cleavage aliphatic alkenes Bond unactivated NiX cycloisomerization cleavage ring opening bond 2008-11-20 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Ring_Opening_of_Methylenecycloalkenes_via_the_C_C_Bond_Cleavage/2898649 3-Methylenecycloalkene-1,1-dicarboxylates underwent facile ring opening via the cleavage of the unactivated C−C bond to yield aliphatic alkenes. The reaction (intramolecular deallylation) was catalyzed by “Ni−H” species generated in situ from a NiX<sub>2</sub>(phosphine)<sub><i>n</i></sub>/R<sub>3</sub>Al mixture and proceeded under ambient conditions. In addition, the skeletal rearrangement of a diene could be carried out by a one-pot cycloisomerization/deallylation sequence.