@article{oai:nagoya.repo.nii.ac.jp:02002066,
 author = {Ohmura, Shuhei and Isogai, Ryosuke and Ishihara, Kazuaki},
 issue = {10},
 journal = {Asian Journal of Organic Chemistry},
 month = {Oct},
 note = {Radical cation [4+2] cycloaddition is an alternative strategy for constructing various six-membered rings that cannot be easily accessed by thermal [4+2] cycloaddition. Here, we developed an FeCl3/AgSbF6 co-initiator to promote radical cation [4+2] cycloaddition of non-conjugated tetrasubstituted alkenes with 2,3-dimethyl-1,3-butadiene. In the presence of 10 mol% of FeCl3 and 30 mol% of AgSbF6, the reaction proceeded smoothly in MeCN to provide the cycloadducts from tetrasubstituted alkenes having an electron-rich aromatic group, which improved the yield. We demonstrate the efficiency of an FeCl3/AgSbF6 co-initiator by comparing our finding to the results with previously reported iron(III) initiators in an investigation of the substrate scope. In addition, a kinetic study was conducted to elucidate the detailed reaction mechanism, in which the rate-determining step can be facilitated by intramolecular single electron transfer.},
 pages = {2534--2537},
 title = {Radical Cation [4+2] Cycloaddition of Non-Conjugated Tetrasubstituted Alkenes by an FeCl3/AgSbF6 Co-Initiator},
 volume = {10},
 year = {2021}
}