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Mu B, Mu L, Schibli R, Ametamey SM, Milicevic Sephton S. Improved Syntheses of the mGlu5 Antagonists MMPEP and MTEP Using Sonogashira Cross-Coupling. Pharmaceuticals (Basel) 2018; 11:ph11010024. [PMID: 29461503 PMCID: PMC5874720 DOI: 10.3390/ph11010024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Revised: 02/10/2018] [Accepted: 02/12/2018] [Indexed: 11/16/2022] Open
Abstract
The Sonogashira cross-coupling, a key step in the syntheses of the mGlu5 antagonists MMPEP and MTEP, provided an improved three-step method for the preparation of MMPEP in 62% overall yield. Using Spartan molecular modeling kit an explanation for the failure to employ analogues method in the synthesis of MTEP was sought. The DFT calculations indicated that meaningful isolated yields were obtained when the HOMO energy of the aryl halide was lower than the HOMO energy of the respective alkyne.
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Affiliation(s)
- Boshuai Mu
- Center of Radiopharmaceutical Sciences of ETH, PSI and USZ, Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, Vladimir-Prelog-Weg 4, 8093 Zurich, Switzerland.
| | - Linjing Mu
- Center of Radiopharmaceutical Sciences of ETH, PSI and USZ, Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, Vladimir-Prelog-Weg 4, 8093 Zurich, Switzerland.
- Department of Nuclear Medicine, University Hospital Zurich, Ramistrasse 101, 8003 Zurich, Switzerland.
| | - Roger Schibli
- Center of Radiopharmaceutical Sciences of ETH, PSI and USZ, Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, Vladimir-Prelog-Weg 4, 8093 Zurich, Switzerland.
- Department of Nuclear Medicine, University Hospital Zurich, Ramistrasse 101, 8003 Zurich, Switzerland.
| | - Simon M Ametamey
- Center of Radiopharmaceutical Sciences of ETH, PSI and USZ, Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, Vladimir-Prelog-Weg 4, 8093 Zurich, Switzerland.
| | - Selena Milicevic Sephton
- Center of Radiopharmaceutical Sciences of ETH, PSI and USZ, Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, Vladimir-Prelog-Weg 4, 8093 Zurich, Switzerland.
- Department of Nuclear Medicine, University Hospital Zurich, Ramistrasse 101, 8003 Zurich, Switzerland.
- Molecular Imaging Chemistry Laboratory, Wolfson Brain Imaging Centre, Department of Clinical Neurosciences, University of Cambridge, Box 65 Cambridge Biomedical Campus, Cambridge CB2 0QQ, UK..
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Affiliation(s)
- Joseph Sherma
- a Department of Chemistry , Lafayette College , Easton , Pennsylvania , USA
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