Welbes, Leilani L. Lyons, Thomas W. Cychosz, Katie A. Sanford, Melanie S. Synthesis of Cyclopropanes via Pd(II/IV)-Catalyzed Reactions of Enynes This report describes a new Pd-catalyzed oxidation reaction for the stereospecific conversion of enynes into cyclopropyl ketones. Unlike related Pd<sup>II/0</sup>, Au, and Pt-catalyzed cyclopropane-forming reactions, these transformations proceed with net inversion of geometry with respect to the starting olefin. This result is consistent with a Pd<sup>II/IV</sup> mechanism in which the key cyclopropane-forming step involves nucleophilic attack of a tethered olefin onto the Pd<sup>IV</sup>−C bond. EnynesThis report;Pd;nucleophilic attack;enyne;mechanism;Cyclopropane;olefin;transformation;Synthesi;oxidation;PdIV;PdII;inversion;cyclopropyl ketones;stereospecific conversion;bond 2007-05-09
    https://acs.figshare.com/articles/journal_contribution/Synthesis_of_Cyclopropanes_via_Pd_II_IV_Catalyzed_Reactions_of_Enynes/3008908
10.1021/ja071204j.s003