Catalytic C-H Amination Mediated by Dipyrrin Cobalt Imidos.

ABSTRACT: Reduction of (^ArL)Co^IIBr (^ArL = 5-mesityl-1,9-(2,4,6-Ph₃C₆H₂)dipyrrin) with potassium graphite afforded the novel Co^I synthon (^ArL)Co^I. Treatment of (^ArL)Co^I with a stoichiometric amount of various alkyl azides (N₃R) furnished three-coordinate Co^III alkyl imidos (^ArL)Co(NR), as confirmed by single-crystal X-ray diffraction (R: CMe₂Bu, CMe₂(CH₂)₂CHMe₂). The exclusive formation of four-coordinate cobalt tetrazido complexes (^ArL)Co(κ²-N₄R₂) was observed upon addition of excess azide, inhibiting any subsequent C-H amination. However, when a weak

SUBMITTER: Baek Y 

PROVIDER: S-EPMC7256963 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature