1
|
Gao C, Li Y, Wang M, Gong D, Zhao L. Ru(II)-Catalyzed N-Methylation of Amines Using Methanol as the C1 Source. ACS OMEGA 2023; 8:36597-36603. [PMID: 37810663 PMCID: PMC10552110 DOI: 10.1021/acsomega.3c06260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 09/08/2023] [Indexed: 10/10/2023]
Abstract
Four ruthenium complexes were used as catalysts for the N-methylation of amines using methanol as the C1 source under weak base conditions. The (DPEPhos)RuCl2PPh3(1a) catalyst showed the best catalytic performance (0.5 mol %, 12 h). The deuterium labeling and control experiments suggested the reaction via the Ru-H mechanism. This study provides a new ruthenium catalyst system for N-methylation with methanol under weak base conditions.
Collapse
Affiliation(s)
- Caiyu Gao
- Key Laboratory
of Preparation
and Application of Environmental Friendly Materials, Ministry of Education,
College of Chemistry, Jilin Normal University, Changchun 130103, P. R. China
| | - Yufei Li
- Key Laboratory
of Preparation
and Application of Environmental Friendly Materials, Ministry of Education,
College of Chemistry, Jilin Normal University, Changchun 130103, P. R. China
| | - Minghao Wang
- Key Laboratory
of Preparation
and Application of Environmental Friendly Materials, Ministry of Education,
College of Chemistry, Jilin Normal University, Changchun 130103, P. R. China
| | - Dawei Gong
- Key Laboratory
of Preparation
and Application of Environmental Friendly Materials, Ministry of Education,
College of Chemistry, Jilin Normal University, Changchun 130103, P. R. China
| | - Lina Zhao
- Key Laboratory
of Preparation
and Application of Environmental Friendly Materials, Ministry of Education,
College of Chemistry, Jilin Normal University, Changchun 130103, P. R. China
| |
Collapse
|
2
|
Kassenbrock A, Vasdev N, Liang SH. Selected PET Radioligands for Ion Channel Linked Neuroreceptor Imaging: Focus on GABA, NMDA and nACh Receptors. Curr Top Med Chem 2017; 16:1830-42. [PMID: 26975506 DOI: 10.2174/1568026616666160315142457] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 08/01/2015] [Accepted: 08/03/2015] [Indexed: 12/11/2022]
Abstract
Positron emission tomography (PET) neuroimaging of ion channel linked receptors is a developing area of preclinical and clinical research. The present review focuses on recent advances with radiochemistry, preclinical and clinical PET imaging studies of three receptors that are actively pursued in neuropsychiatric drug discovery: namely the γ-aminobutyric acid-benzodiazapine (GABA) receptor, nicotinic acetylcholine receptor (nAChR), and N-methyl-D-aspartate (NMDA) receptor. Recent efforts to develop new PET radioligands for these targets with improved brain uptake, selectivity, stability and pharmacokinetics are highlighted.
Collapse
Affiliation(s)
| | | | - Steven H Liang
- Division of Nuclear Medicine and Molecular Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.
| |
Collapse
|
3
|
Vaughan MD, Su Z, Daub E, Honek JF. Intriguing cellular processing of a fluorinated amino acid during protein biosynthesis in Escherichia coli. Org Biomol Chem 2016; 14:8942-8946. [DOI: 10.1039/c6ob01690a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Unusual in vivo processing of a fluorinated amino acid provides unexpected dual protein labeling in E. coli.
Collapse
Affiliation(s)
- Mark D. Vaughan
- Department of Chemistry
- University of Waterloo
- Waterloo
- ON N2L 3G1 Canada
| | - Zhengding Su
- Department of Chemistry
- University of Waterloo
- Waterloo
- ON N2L 3G1 Canada
| | - Elisabeth Daub
- Department of Chemistry
- University of Waterloo
- Waterloo
- ON N2L 3G1 Canada
| | - J. F. Honek
- Department of Chemistry
- University of Waterloo
- Waterloo
- ON N2L 3G1 Canada
| |
Collapse
|
4
|
Naumiec GR, Jenko KJ, Zoghbi SS, Innis RB, Cai L, Pike VW. N'-3-(Trifluoromethyl)phenyl Derivatives of N-Aryl-N'-methylguanidines as Prospective PET Radioligands for the Open Channel of the N-Methyl-d-aspartate (NMDA) Receptor: Synthesis and Structure-Affinity Relationships. J Med Chem 2015; 58:9722-30. [PMID: 26588360 DOI: 10.1021/acs.jmedchem.5b01510] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
N-Methyl-d-aspartate (NMDA) receptor dysfunction has been linked to several neuropsychiatric disorders, including Alzheimer's disease, epilepsy, drug addiction, and schizophrenia. A radioligand that could be used with PET to image and quantify human brain NMDA receptors in the activated "open channel" state would be useful for research on such disorders and for the development of novel therapies. To date, no radioligands have shown well-validated efficacy for imaging NMDA receptors in human subjects. In order to discover improved radioligands for PET imaging, we explored structure-affinity relationships in N'-3-(trifluoromethyl)phenyl derivatives of N-aryl-N'-methylguanidines, seeking high affinity and moderate lipophilicity, plus necessary amenability for labeling with a positron-emitter, either carbon-11 or fluorine-18. Among a diverse set of 80 prepared N'-3-(trifluoromethyl)phenyl derivatives, four of these compounds (13, 19, 20, and 36) displayed desirable low nanomolar affinity for inhibition of [(3)H](+)-MK801 at the PCP binding site and are of interest for candidate PET radioligand development.
Collapse
Affiliation(s)
- Gregory R Naumiec
- Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health , Building 10, Room B3 C346A, 10 Center Drive, Bethesda, Maryland 20892-1003, United States
| | - Kimberley J Jenko
- Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health , Building 10, Room B3 C346A, 10 Center Drive, Bethesda, Maryland 20892-1003, United States
| | - Sami S Zoghbi
- Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health , Building 10, Room B3 C346A, 10 Center Drive, Bethesda, Maryland 20892-1003, United States
| | - Robert B Innis
- Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health , Building 10, Room B3 C346A, 10 Center Drive, Bethesda, Maryland 20892-1003, United States
| | - Lisheng Cai
- Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health , Building 10, Room B3 C346A, 10 Center Drive, Bethesda, Maryland 20892-1003, United States
| | - Victor W Pike
- Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health , Building 10, Room B3 C346A, 10 Center Drive, Bethesda, Maryland 20892-1003, United States
| |
Collapse
|