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Pedersen SS, Donslund AS, Mikkelsen JH, Bakholm OS, Papp F, Jensen KB, Gustafsson MBF, Skrydstrup T. A Nickel(II)-Mediated Thiocarbonylation Strategy for Carbon Isotope Labeling of Aliphatic Carboxamides. Chemistry 2021; 27:7114-7123. [PMID: 33452676 DOI: 10.1002/chem.202005261] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Indexed: 12/15/2022]
Abstract
A series of pharmaceutically relevant small molecules and biopharmaceuticals bearing aliphatic carboxamides have been successfully labeled with carbon-13. Key to the success of this novel carbon isotope labeling technique is the observation that 13 C-labeled NiII -acyl complexes, formed from a 13 CO insertion step with NiII -alkyl intermediates, rapidly react in less than one minute with 2,2'-dipyridyl disulfide to quantitatively form the corresponding 2-pyridyl thioesters. Either the use of 13 C-SilaCOgen or 13 C-COgen allows for the stoichiometric addition of isotopically labeled carbon monoxide. Subsequent one-pot acylation of a series of structurally diverse amines provides the desired 13 C-labeled carboxamides in good yields. A single electron transfer pathway is proposed between the NiII -acyl complexes and the disulfide providing a reactive NiIII -acyl sulfide intermediate, which rapidly undergoes reductive elimination to the desired thioester. By further optimization of the reaction parameters, reaction times down to only 11 min were identified, opening up the possibility of exploring this chemistry for carbon-11 isotope labeling. Finally, this isotope labeling strategy could be adapted to the synthesis of 13 C-labeled liraglutide and insulin degludec, representing two antidiabetic drugs.
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Affiliation(s)
- Simon S Pedersen
- Carbon Dioxide Activation Center (CADIAC), Department of, Chemistry and the Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000, Aarhus C, Denmark
| | - Aske S Donslund
- Carbon Dioxide Activation Center (CADIAC), Department of, Chemistry and the Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000, Aarhus C, Denmark
| | - Jesper H Mikkelsen
- Carbon Dioxide Activation Center (CADIAC), Department of, Chemistry and the Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000, Aarhus C, Denmark
| | - Oskar S Bakholm
- Carbon Dioxide Activation Center (CADIAC), Department of, Chemistry and the Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000, Aarhus C, Denmark
| | - Florian Papp
- Carbon Dioxide Activation Center (CADIAC), Department of, Chemistry and the Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000, Aarhus C, Denmark
| | - Kim B Jensen
- Global Research Technologies, Novo Nordisk A/S, Novo Nordisk Park, 2760, Måløv, Denmark
| | - Magnus B F Gustafsson
- Global Research Technologies, Novo Nordisk A/S, Novo Nordisk Park, 2760, Måløv, Denmark
| | - Troels Skrydstrup
- Carbon Dioxide Activation Center (CADIAC), Department of, Chemistry and the Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000, Aarhus C, Denmark
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