A Catalytically Generated Transition Metal Analog of the Simmons-Smith Reagent
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(PDI)CoBr2 complexes (PDI = pyridine-diimine) serve as precatalysts for reductive alkene cyclopropanations using CH2Br2 and Zn. A key question regarding the mechanism of this process is whether CH2 transfer occurs through a Co(CH2Br) species or through an isom... ...
