title: Reductive Cyclopropanations Catalyzed by Dinuclear Nickel Complexes.
abstract: Dinuclear Ni complexes supported by naphthyridine-diimine (NDI) ligands catalyze the reductive cyclopropanation of alkenes with CH2 Cl2 as the methylene source. The use of mild terminal reductants (Zn or Et2 Zn) confers significant functional-group tolerance, and the catalyst accommodates structurally and electronically diverse alkenes. Mononickel catalysts bearing related N chelates afford comparatively low cyclopropane yields (≤20 %). These results constitute an entry into catalytic carbene transformations from oxidized methylene precursors.
authors.affiliation: Department of Chemistry, Purdue University, 560 Oval Dr., West Lafayette, IN, 47907, USA.
authors.forename: You-Yun
authors.initials: YY
authors.lastname: Zhou
authors.affiliation: Department of Chemistry, Purdue University, 560 Oval Dr., West Lafayette, IN, 47907, USA. cuyeda@purdue.edu.
authors.forename: Christopher
authors.initials: C
authors.lastname: Uyeda
keywords: alkenes; carbene transfer; cyclopropanation; nickel catalysis; reductive cycloaddition