4.8 Article

Copper catalysis: ligand-controlled selective N-methylation or N-formylation of amines with CO2 and phenylsilane

Journal

GREEN CHEMISTRY
Volume 20, Issue 21, Pages 4853-4858

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c8gc02280a

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Funding

  1. National Program on Key Research Project [2016YFA0602900]
  2. National Natural Science Foundation of China [21672119]
  3. Natural Science Foundation of Tianjin [16JCZDJC39900]

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Cupric subcarbonate (Cu-2(OH)(2)CO3) was found to be effective for the reductive functionalization of CO2 to produce formamides and methylamines with phenylsilane as reductant. Interestingly, N-formylation and N-methylation were switched on/off by subtly choosing the ligand: DPPB (1,4-bis(diphenylphosphino) butane) promoted N-methylation whereas Ph2CyP (diphenylcyclohexylphosphine) favored for N-formylation.

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