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Iwamoto R. FT-IR/NIR Spectroscopic Study of Interactions between Water and Alkylamines. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2019. [DOI: 10.1246/bcsj.20190032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Reikichi Iwamoto
- NIRS Institute of Water, 2-7-10 Yuyamadai, Kawanishi, Hyogo 666-0137, Japan
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Zheng S, Xu S, Wang G, Tang Q, Jiang X, Li Z, Xu Y, Wang R, Lin F. Proposed Hydrogen-Bonding Index of Donor or Acceptor Reflecting Its Intrinsic Contribution to Hydrogen-Bonding Strength. J Chem Inf Model 2017; 57:1535-1547. [DOI: 10.1021/acs.jcim.7b00022] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Suqing Zheng
- School
of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, P. R. China
| | - Shaofang Xu
- School
of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, P. R. China
| | - Guitao Wang
- State
Key Laboratory of Bioorganic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Qing Tang
- School
of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, P. R. China
| | - Xiaonan Jiang
- State
Key Laboratory of Bioorganic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Zhanting Li
- State
Key Laboratory of Bioorganic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Yong Xu
- Institute
of Chemical Biology, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Guangzhou Science
Park, Guangzhou, Guangdong 510530, P. R. China
| | - Renxiao Wang
- State
Key Laboratory of Bioorganic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Fu Lin
- School
of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, P. R. China
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Yoshida T, Farone WA, Xantheas SS. Isomers and conformational barriers of gas-phase nicotine, nornicotine, and their protonated forms. J Phys Chem B 2014; 118:8273-85. [PMID: 24654683 DOI: 10.1021/jp501646p] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report extensive conformational searches of the gas-phase neutral nicotine, nornicotine, and their protonated analogs and the pathways and barriers for the interconversion between their various isomers that are based on ab initio second-order Møller-Plesset perturbation (MP2) electronic structure calculations. Initial searches were performed with the 6-31G(d,p), and the energetics of the most important structures were further refined from geometry optimizations with the larger aug-cc-pVTZ basis set. On the basis of the calculated free energies at T = 298 K for the gas-phase molecules, neutral nicotine has two dominant trans conformers, whereas neutral nornicotine is a mixture of several conformers. For nicotine, the protonation on both the pyridine and the pyrrolidine sites is energetically competitive, whereas nornicotine prefers protonation on the pyridine nitrogen. The protonated form of nicotine is mainly a mixture of two pyridine-protonated trans conformers and two pyrrolidine-protonated trans conformers, whereas the protonated form of nornicotine is a mixture of four pyridine-protonated trans conformers. Nornicotine is conformationally more flexible than nicotine; however, it is less protonated at the biologically important pyrrolidine nitrogen site. The lowest energy isomers for each case were found to interconvert via low (<6 kcal/mol) rotational barriers around the pyridine-pyrrolidine bond. These barriers are much lower than previous estimates based on lower levels of theory obtained without relaxation of the structure along the path. Nicotine was found to bind more strongly to tryptophan (Trp) than nornicotine, a finding that is consistent with nicotine's enhanced affinity in the nicotinic acetylcholide receptor.
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Affiliation(s)
- Tomoki Yoshida
- Center for Quantum Life Sciences and Department of Chemistry, Graduate School of Science, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
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Meanwell NA. The Influence of Bioisosteres in Drug Design: Tactical Applications to Address Developability Problems. TACTICS IN CONTEMPORARY DRUG DESIGN 2014; 9. [PMCID: PMC7416817 DOI: 10.1007/7355_2013_29] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The application of bioisosteres in drug discovery is a well-established design concept that has demonstrated utility as an approach to solving a range of problems that affect candidate optimization, progression, and durability. In this chapter, the application of isosteric substitution is explored in a fashion that focuses on the development of practical solutions to problems that are encountered in typical optimization campaigns. The role of bioisosteres to affect intrinsic potency and selectivity, influence conformation, solve problems associated with drug developability, including P-glycoprotein recognition, modulating basicity, solubility, and lipophilicity, and to address issues associated with metabolism and toxicity is used as the underlying theme to capture a spectrum of creative applications of structural emulation in the design of drug candidates.
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Meanwell NA. Synopsis of Some Recent Tactical Application of Bioisosteres in Drug Design. J Med Chem 2011; 54:2529-91. [DOI: 10.1021/jm1013693] [Citation(s) in RCA: 1876] [Impact Index Per Article: 144.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Nicholas A. Meanwell
- Department of Medicinal Chemistry, Bristol-Myers Squibb Pharmaceutical Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
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Wu CT, Chen PY, Chen JG, Suryanarayanan V, Ho KC. Detection of nicotine based on molecularly imprinted TiO2-modified electrodes. Anal Chim Acta 2009; 633:119-26. [DOI: 10.1016/j.aca.2008.11.038] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2008] [Revised: 11/13/2008] [Accepted: 11/14/2008] [Indexed: 10/21/2022]
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Locati A, Berthelot M, Evain M, Lebreton J, Le Questel JY, Mathé-Allainmat M, Planchat A, Renault E, Graton J. The Exceptional Hydrogen-Bond Properties of Neutral and Protonated Lobeline. J Phys Chem A 2007; 111:6397-405. [PMID: 17585846 DOI: 10.1021/jp071632b] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The X-ray diffraction structure of (-)-lobeline, a high affinity nicotinic ligand, has been determined. A comparison with its hydrobromide and hydrochloride salts shows the great flexibility of the two lateral chains of the N-methylpiperidine ring. Infrared studies carried out on the same species, in the solid state and in solution, reveal the propensity of this molecular framework to accommodate very specific hydrogen bonds (HBs) depending on the state-neutral or protonated-of the molecule. In solution, a strong internal HB between the hydroxyl group and the piperidine nitrogen gives an exceptionally high HB affinity to the hydroxyl oxygen of the lobeline base. In the ionic form, both NH+ and OH groups of the molecule cooperate as HB donors to chelate the counterion. These interactions provide very stable structures and indicate that protonated lobeline can also act as a strong HB donor.
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Affiliation(s)
- Abel Locati
- Laboratoire de Spectrochimie et Modélisation (EA 1149, FR 2465), Université de Nantes, Nantes Atlantique Universités, Faculté des Sciences et des Techniques de Nantes, 2, rue de la Houssinière, BP 92208, F-44322 Nantes Cedex 3, France
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Preferred hydrogen bonding site of 1,3,6,8-tetraazatricyclo[4.3.1.13,8]undecane (TATU) to hydroquinone. J Mol Struct 2007. [DOI: 10.1016/j.molstruc.2006.10.039] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Arnaud V, Berthelot M, Evain M, Graton J, Le Questel JY. Hydrogen-Bond Interactions of Nicotine and Acetylcholine Salts: A Combined Crystallographic, Spectroscopic, Thermodynamic and Theoretical Study. Chemistry 2007; 13:1499-510. [PMID: 17103466 DOI: 10.1002/chem.200600808] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The hydrogen-bond (HB) interactions of the monocharged active forms of nicotine and acetylcholine (ACh) have been compared theoretically by using density functional theory (DFT) calculations and experimentally on the basis of crystallographic observations and the measurement of equilibrium constants in solution. The 2,4,6-trinitrophenolate (picrate) counterion was used to determine the experimental HB basicity of the cations despite its potential multisite HB acceptor properties. The preferred HB interaction site of the ammonium picrate salts was determined from a survey of crystallographic data found in the Cambridge Structural Database (CSD) and is supported by theoretical calculations. Two distinct classes of ammonium groups were characterised depending on the absence (quaternary ammonium) or presence (tertiary, secondary and primary ammoniums) of an N(+)HO hydrogen bond linking the two ions. The crystal structure of nicotinium picrate was determined and compared with that of ACh. This analysis revealed the peculiar behaviour of the ammonium moiety of nicotinic acetylcholine receptor (nAChR) ligands towards the picrate anion. Dedicated methods have been developed to separate the individual contributions of the anion and cation accepting sites to the overall HB basicity of the ion pairs measured in solution. The HB basicities of the picrate anions associated with the two different ammonium classes were determined in dichloromethane solution by using several model ion pairs with non-basic ammonium cations. The experimental and theoretical studies performed on the nicotine and ACh cations consistently show the significant HB ability of the acceptor site of nAChR agonists in their charged form. Both the greater HB basicity of the pyridinic nitrogen over the carbonyl oxygen and the greater HB acidity of the N(+)H unit relative to N(+)CH could contribute to the higher affinity for nAChRs of nicotine-like ligands relative to ACh-like ligands.
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Affiliation(s)
- Virginie Arnaud
- EA 1149, FR CNRS 2465, Université de Nantes, Nantes Atlantique Universités, Faculté des Sciences et des Techniques de Nantes, 2, rue de la Houssinière, BP 92208, 44322 Nantes Cedex 3, France
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