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Luo C, Alegre-Requena JV, Sujansky SJ, Pajk SP, Gallegos LC, Paton RS, Bandar JS. Mechanistic Studies Yield Improved Protocols for Base-Catalyzed Anti-Markovnikov Alcohol Addition Reactions. J Am Chem Soc 2022; 144:9586-9596. [PMID: 35605253 DOI: 10.1021/jacs.1c13397] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The catalytic anti-Markovnikov addition of alcohols to simple alkenes is a longstanding synthetic challenge. We recently disclosed the use of organic superbase catalysis for the nucleophilic addition of alcohols to activated styrene derivatives. This article describes mechanistic studies on this reversible reaction, including thermodynamic and kinetic profiling as well as computational modeling. Our findings show the negative entropy of addition is counterbalanced by an enthalpy that is most favored in nonpolar solvents. However, a large negative alcohol rate order under these conditions indicates excess alcohol sequesters the active alkoxide ion pairs, slowing the reaction rate. These observations led to an unexpected solution to a thermodynamically challenging reaction: use of less alcohol enables faster addition, which in turn allows for lower reaction temperatures to counteract Le Chatelier's principle. Thus, our original method has been improved with new protocols that do not require excess alcohol stoichiometry, enable an expanded alkene substrate scope, and allow for the use of more practical catalyst systems. The generality of this insight for other challenging hydroetherification reactions is also demonstrated through new alkenol cyclization and oxa-Michael addition reactions.
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Affiliation(s)
- Chaosheng Luo
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Juan V Alegre-Requena
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Stephen J Sujansky
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Spencer P Pajk
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Liliana C Gallegos
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Robert S Paton
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Jeffrey S Bandar
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
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Rajasekar P, Pandey S, Ferrara JD, Del Campo M, Le Magueres P, Boomishankar R. Chiral Separation of Styrene Oxides Supported by Enantiomeric Tetrahedral Neutral Pd(II) Cages. Inorg Chem 2019; 58:15017-15020. [DOI: 10.1021/acs.inorgchem.9b02389] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
| | - Swechchha Pandey
- Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
| | - Joseph D. Ferrara
- Rigaku Americas Corporation, 9009 New Trails Drive, The Woodlands, Texas 77381, United States
| | - Mark Del Campo
- Rigaku Americas Corporation, 9009 New Trails Drive, The Woodlands, Texas 77381, United States
| | - Pierre Le Magueres
- Rigaku Americas Corporation, 9009 New Trails Drive, The Woodlands, Texas 77381, United States
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Luo C, Bandar JS. Superbase-Catalyzed anti-Markovnikov Alcohol Addition Reactions to Aryl Alkenes. J Am Chem Soc 2018; 140:3547-3550. [DOI: 10.1021/jacs.8b00766] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Chaosheng Luo
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Jeffrey S. Bandar
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
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Neiens P, De Simone A, Höfner G, Wanner KT. Simultaneous Multiple MS Binding Assays for the Dopamine, Norepinephrine, and Serotonin Transporters. ChemMedChem 2018; 13:453-463. [PMID: 29451362 DOI: 10.1002/cmdc.201700737] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 01/10/2018] [Indexed: 12/17/2022]
Abstract
In this work, we present label-free, mass-spectrometry-based binding assays (MS Binding Assays), targeting the human dopamine, norepinephrine, and serotonin transporters (hDAT, hNET, and hSERT) in simultaneous binding experiments. Using a validated LC-ESI-MS/MS method for quantification of the selective dopamine transporter inhibitor (R,R)-4-(2-benzhydryloxyethyl)-1-(4-fluorobenzyl)piperidin-3-ol ((R,R)-D-84), the selective norepinephrine transporter inhibitor (S,S)-reboxetine, and the selective serotonin reuptake inhibitor (S)-citalopram, binding affinities at the three monoamine transporters could be characterized simultaneously in a single binding experiment. The performed simultaneous saturation and competition experiments yielded results that are in good accordance with those determined in MS Binding Assays addressing the monoamine transporters individually. The results obtained from this study underscore the potential of MS Binding Assays for simultaneous affinity determination at different targets, which is difficult to accomplish with conventional radioligand binding assays.
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Affiliation(s)
- Patrick Neiens
- Department of Pharmacy-Center of Drug Research, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377, Munich, Germany
| | - Angela De Simone
- Department for Life Quality Studies, Alma Mater Studiorum-University of Bologna, Corso D'Augusto 237, 47921, Rimini, Italy
| | - Georg Höfner
- Department of Pharmacy-Center of Drug Research, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377, Munich, Germany
| | - Klaus T Wanner
- Department of Pharmacy-Center of Drug Research, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377, Munich, Germany
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Kamble RB, Devalankar D, Suryavanshi G. Two stereocentered HKR of anti-β,β′-diphenylpropanoxirane and anti-3-phenylethyloxiranes catalysed by Co(iii)(salen)-OAc complex: enantioselective synthesis of (+)-sertraline and (+)-naproxen. NEW J CHEM 2018. [DOI: 10.1039/c8nj01616j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Two stereocentered HKR of anti-β,β′-diphenylmethyloxirane and anti-3-phenylethyloxiranes gives enantiopure anti-1,2-diols and oxiranes. This method is utilised for the synthesis of (+)-sertraline and (+)-naproxen.
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Affiliation(s)
- Rohit B. Kamble
- Chemical Engineering and Process Development Division
- National Chemical Laboratory
- Pune-411008
- India
- Academy of Scientific & Innovative Research
| | | | - Gurunath Suryavanshi
- Chemical Engineering and Process Development Division
- National Chemical Laboratory
- Pune-411008
- India
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Neiens P, Höfner G, Wanner KT. Determination of the enantiomeric purity of the selective dopamine transporter inhibitor (+)-R,R
-4-(2-benzhydryloxyethyl)-1-(4-fluorobenzyl)piperidin-3-ol. Chirality 2017; 29:294-303. [DOI: 10.1002/chir.22688] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 02/07/2017] [Accepted: 02/22/2017] [Indexed: 01/11/2023]
Affiliation(s)
- Patrick Neiens
- Department Pharmazie - Zentrum für Pharmaforschung; Ludwig-Maximilians-Universität München; Munich Germany
| | - Georg Höfner
- Department Pharmazie - Zentrum für Pharmaforschung; Ludwig-Maximilians-Universität München; Munich Germany
| | - Klaus T. Wanner
- Department Pharmazie - Zentrum für Pharmaforschung; Ludwig-Maximilians-Universität München; Munich Germany
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Wu S, Li A, Chin YS, Li Z. Enantioselective Hydrolysis of Racemic and Meso-Epoxides with Recombinant Escherichia coli Expressing Epoxide Hydrolase from Sphingomonas sp. HXN-200: Preparation of Epoxides and Vicinal Diols in High ee and High Concentration. ACS Catal 2013. [DOI: 10.1021/cs300804v] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Shuke Wu
- Department
of Chemical and Biomolecular
Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576
- Singapore-MIT Alliance, National University of Singapore, 4 Engineering Drive
3, Singapore 117576
| | - Aitao Li
- Department
of Chemical and Biomolecular
Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576
| | - Yit Siang Chin
- Department
of Chemical and Biomolecular
Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576
| | - Zhi Li
- Department
of Chemical and Biomolecular
Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576
- Singapore-MIT Alliance, National University of Singapore, 4 Engineering Drive
3, Singapore 117576
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Dutta AK, Gopishetty B, Gogoi S, Ali S, Zhen J, Reith M. The novel trisubstituted pyran derivative D-142 has triple monoamine reuptake inhibitory activity and exerts potent antidepressant-like activity in rodents. Eur J Pharmacol 2011; 671:39-44. [PMID: 21963455 DOI: 10.1016/j.ejphar.2011.09.162] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2011] [Revised: 09/02/2011] [Accepted: 09/15/2011] [Indexed: 12/28/2022]
Abstract
Major depression disorder is a significant health problem with 10-20% of all adults suffering from this disease. The underlying causes of depression are still unclear and 15% of depressed patients are resistant to all known therapies. Monoamine therapies have so far been the most successful approach for treating depression. Triple monoamine reuptake inhibitors have recently been implicated in generation of potent antidepressant activity while possibly exhibiting a low side-effect profile in addition to treating anhedonia. The additional, previously under-appreciated involvement of dopaminergic systems in depression prompted our efforts to develop novel asymmetric trisubstituted and disubstituted pyran derivatives as triple reuptake inhibitors. One of the lead compounds, D-142, exhibited uptake inhibition (K(i)) values of 29.3 nM, 14.7 nM and 59.3 ± 13.7 nM for norepinephrine, serotonin and dopamine transporters, respectively. Its affinity for serotonin transporter was comparable to fluoxetine, a well known SSRI. In the rat forced swimming test, compound D-142 exhibited potent antidepressant activity in the dose range tested (2.5, 5 and 10mg/kg) and was far more efficacious than the reference compound imipramine. In the mouse tail suspension test, compound D-142 reduced immobility in a dose (2.5, 5 and 10mg/kg) dependent manner, indicating a potent antidepressant effect. In locomotor activity tests, compound D-142 did not exhibit any stimulation in the same dose ranges. In the extended CNS receptors screening assay this molecule exhibited little or no non-specific interaction in the CNS, indicating high specificity for monoamine transporters. These results advance D-142 as a potential potent antidepressant.
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Affiliation(s)
- Aloke K Dutta
- Wayne State University, Department of Pharmaceutical Sciences, Detroit, MI 48202, USA.
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