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Zhu H, Li S, Jia Y, Jiang J, Hu F, Li L, Cao F, Wang X, Li S, Ouyang G, Tian G, Gong K, Hou G, He W, Zhao Z, Pittman CU, Deng F, Liu M, Sun K, Tang BZ. Pseudo-resonance structures in chiral alcohols and amines and their possible aggregation states. Front Chem 2022; 10:964615. [PMID: 36105310 PMCID: PMC9465258 DOI: 10.3389/fchem.2022.964615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 07/18/2022] [Indexed: 11/13/2022] Open
Abstract
We now report that some chiral compounds, like alcohols, which are not sterically hindered atropisomers nor epimer mixtures, exhibit two sets of simultaneous NMR spectra in CDCl3. Some other chiral alcohols also simultaneously exhibit two different NMR spectra in the solid state because two different conformers, A and B had different sizes because their corresponding bond lengths and angles are different. These structures were confirmed in the same solid state by X-ray. We designate these as pseudo-resonance for a compound exhibiting several different corresponding lengths that simultaneously coexist in the solid state or liquid state. Variable-temperature NMR, 2D NMR methods, X-ray, neutron diffraction, IR, photo-luminesce (PL) and other methods were explored to study whether new aggregation states caused these heretofore unknown pseudo-resonance structures. Finally, eleven chiral alcohols or diols were found to co-exist in pseudo-resonance structures by X-ray crystallography in a search of the CDS database.
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Affiliation(s)
- Huajie Zhu
- School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, China
- Institute of Life Science and Green Development, Hebei University, Baoding, China
- *Correspondence: Huajie Zhu, ; Feng Deng, ; Minghua Liu, ; Kai Sun, ; Ben Zhong Tang,
| | - Shengnan Li
- School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, China
- Institute of Life Science and Green Development, Hebei University, Baoding, China
| | - Yunjing Jia
- Institute of Life Science and Green Development, Hebei University, Baoding, China
| | - Juxing Jiang
- Kunming Institute of Botany CAS, Kunming, Yunnan, China
| | - Feiliu Hu
- Institute of Life Science and Green Development, Hebei University, Baoding, China
| | - Longfei Li
- Institute of Life Science and Green Development, Hebei University, Baoding, China
| | - Fei Cao
- Institute of Life Science and Green Development, Hebei University, Baoding, China
| | - Xiaoke Wang
- Institute of Life Science and Green Development, Hebei University, Baoding, China
| | - Shenhui Li
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics CAS, Wuhan, Hubei, China
| | - Guanghui Ouyang
- Institute of Chemistry, Chinese Academy of Sciences, Beijing, China
| | - Gengfang Tian
- Neutron Scattering Laboratory, Department of Nuclear Physics, China Institute of Atomic Energy, Beijing, China
| | - Ke Gong
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics CAS, Dalian, China
| | - Guangjin Hou
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics CAS, Dalian, China
| | - Wei He
- School of Science and Engineering, Shenzhen Institute of Aggregate Science and Technology, The Chinese University of Hong Kong, Shenzhen, China
| | - Zheng Zhao
- School of Science and Engineering, Shenzhen Institute of Aggregate Science and Technology, The Chinese University of Hong Kong, Shenzhen, China
| | - Charles U. Pittman
- Department of Chemistry, Mississippi State University, Starkville, MS, United States
| | - Feng Deng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics CAS, Wuhan, Hubei, China
- *Correspondence: Huajie Zhu, ; Feng Deng, ; Minghua Liu, ; Kai Sun, ; Ben Zhong Tang,
| | - Minghua Liu
- Institute of Chemistry, Chinese Academy of Sciences, Beijing, China
- *Correspondence: Huajie Zhu, ; Feng Deng, ; Minghua Liu, ; Kai Sun, ; Ben Zhong Tang,
| | - Kai Sun
- Neutron Scattering Laboratory, Department of Nuclear Physics, China Institute of Atomic Energy, Beijing, China
- *Correspondence: Huajie Zhu, ; Feng Deng, ; Minghua Liu, ; Kai Sun, ; Ben Zhong Tang,
| | - Ben Zhong Tang
- School of Science and Engineering, Shenzhen Institute of Aggregate Science and Technology, The Chinese University of Hong Kong, Shenzhen, China
- *Correspondence: Huajie Zhu, ; Feng Deng, ; Minghua Liu, ; Kai Sun, ; Ben Zhong Tang,
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2
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Tao H, Yuan Y, Chen J, Yu X, Yi P. Synthesis of Cholestan -3-One Derivatives Possessing a C-2 Spiro-Oxindole Substituent. JOURNAL OF CHEMICAL RESEARCH 2018. [DOI: 10.3184/174751918x15161933697781] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A series of C-2 cholestan-3-one spiro-oxindole derivatives were prepared by the 1:3 dipolar cycloaddition reaction between the cholestan-3-one substituted by a C-2 arylidene and the azomethine ylid derived from isatin and sarcosine. The dipolarophiles were efficiently obtained by a Claisen-Schmidt reaction of cholestan-3-one and aromatic aldehydes. The structures of the products were established by a combination of NMR, high-resolution mass spectrometry (HRMS) and X-ray data analysis.
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Affiliation(s)
- Hongwen Tao
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecules, Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, P.R. China
| | - Yinan Yuan
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecules, Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, P.R. China
| | - Jian Chen
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecules, Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, P.R. China
| | - Xianyong Yu
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecules, Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, P.R. China
| | - Pinggui Yi
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecules, Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, P.R. China
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Wu XY, Wang YL, Hai L, Gong P, Wu Y. A new and efficient method for the synthesis of rocuronium bromide. CHINESE CHEM LETT 2017. [DOI: 10.1016/j.cclet.2016.10.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Qian M, Engler-Chiurazzi EB, Lewis SE, Rath NP, Simpkins JW, Covey DF. Structure-activity studies of non-steroid analogues structurally-related to neuroprotective estrogens. Org Biomol Chem 2016; 14:9790-9805. [PMID: 27714297 PMCID: PMC5525543 DOI: 10.1039/c6ob01726f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Estrone and 17β-estradiol are phenolic steroids that are known to be neuroprotective in multiple models of neuronal injury. Previous studies have identified the importance of their phenolic steroid A-ring for neuroprotection and have identified ortho substituents at the C-2 and C-4 positions on the phenol ring that enhance this activity. To investigate the importance of the steroid ring system for neuroprotective activity, phenolic compounds having the cyclopent[b]anthracene, cyclopenta[b]phenanthrene, benz[f]indene, benz[e]indene, indenes linked to a phenol, and a phenolic spiro ring system were prepared. New synthetic methods were developed to make some of the cyclopent[b]anthracene analogues as well as the spiro ring system. Compounds were evaluated for their ability to protect HT-22 hippocampal neurons from glutamate neurotoxicity and their activity relative to a potent neuroprotective analogue of 17β-estradiol was determined. An adamantyl substituent placed ortho to the phenolic hydroxyl group gave neuroprotective analogues in all ring systems studied.
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Affiliation(s)
- Mingxing Qian
- Department of Developmental Biology, Campus Box 8103, Washington University in St. Louis, School of Medicine, 660 S. Euclid Ave., St. Louis, MO 63110, USA.
| | | | - Sara E Lewis
- Center for Basic and Translational Stroke Research, West Virginia University, Morgantown, WV 26506, USA
| | - Nigam P Rath
- Department of Chemistry and Biochemistry and Center for Nanoscience, University of Missouri-St. Louis, St. Louis, MO 63121, USA
| | - James W Simpkins
- Center for Basic and Translational Stroke Research, West Virginia University, Morgantown, WV 26506, USA
| | - Douglas F Covey
- Department of Developmental Biology, Campus Box 8103, Washington University in St. Louis, School of Medicine, 660 S. Euclid Ave., St. Louis, MO 63110, USA. and Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO 63110, USA and Department of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110, USA
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Qian M, Krishnan K, Kudova E, Li P, Manion BD, Taylor A, Elias G, Akk G, Evers AS, Zorumski CF, Mennerick S, Covey DF. Neurosteroid analogues. 18. Structure-activity studies of ent-steroid potentiators of γ-aminobutyric acid type A receptors and comparison of their activities with those of alphaxalone and allopregnanolone. J Med Chem 2014; 57:171-90. [PMID: 24328079 PMCID: PMC3951241 DOI: 10.1021/jm401577c] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A model of the alignment of neurosteroids and ent-neurosteroids at the same binding site on γ-aminobutyric acid type A (GABAA) receptors was evaluated for its ability to identify the structural features in ent-neurosteroids that enhance their activity as positive allosteric modulators of this receptor. Structural features that were identified included: (1) a ketone group at position C-16, (2) an axial 4α-OMe group, and (3) a C-18 methyl group. Two ent-steroids were identified that were more potent than the anesthetic steroid alphaxalone in their threshold for and duration of loss of the righting reflex in mice. In tadpoles, loss of righting reflex for these two ent-steroids occurs with EC50 values similar to those found for allopregnanolone. The results indicate that ent-steroids have considerable potential to be developed as anesthetic agents and as drugs to treat brain disorders that are ameliorated by positive allosteric modulators of GABAA receptor function.
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Affiliation(s)
- Mingxing Qian
- Department of Developmental Biology, Washington University in St. Louis School of Medicine, St. Louis, Missouri, 63110, United States
| | - Kathiresan Krishnan
- Department of Developmental Biology, Washington University in St. Louis School of Medicine, St. Louis, Missouri, 63110, United States
| | - Eva Kudova
- Department of Developmental Biology, Washington University in St. Louis School of Medicine, St. Louis, Missouri, 63110, United States
- Department of Anesthesiology, Washington University in St. Louis School of Medicine, St. Louis, Missouri, 63110, United States
| | - Ping Li
- Department of Anesthesiology, Washington University in St. Louis School of Medicine, St. Louis, Missouri, 63110, United States
| | - Brad D. Manion
- Department of Anesthesiology, Washington University in St. Louis School of Medicine, St. Louis, Missouri, 63110, United States
| | - Amanda Taylor
- Department of Psychiatry, Washington University in St. Louis School of Medicine, St. Louis, Missouri, 63110, United States
| | | | - Gustav Akk
- Department of Anesthesiology, Washington University in St. Louis School of Medicine, St. Louis, Missouri, 63110, United States
- Department of Radiology, The Taylor Family Institute for Innovative Psychiatric Research, Washington University in St. Louis, St. Louis, Missouri, 63110, United States
| | - Alex S. Evers
- Department of Developmental Biology, Washington University in St. Louis School of Medicine, St. Louis, Missouri, 63110, United States
- Department of Anesthesiology, Washington University in St. Louis School of Medicine, St. Louis, Missouri, 63110, United States
- Department of Radiology, The Taylor Family Institute for Innovative Psychiatric Research, Washington University in St. Louis, St. Louis, Missouri, 63110, United States
| | - Charles F. Zorumski
- Department of Psychiatry, Washington University in St. Louis School of Medicine, St. Louis, Missouri, 63110, United States
- Department of Radiology, The Taylor Family Institute for Innovative Psychiatric Research, Washington University in St. Louis, St. Louis, Missouri, 63110, United States
- Department of Anatomy and Neurobiology, Washington University in St. Louis School of Medicine, St. Louis, Missouri, 63110, United States
| | - Steven Mennerick
- Department of Psychiatry, Washington University in St. Louis School of Medicine, St. Louis, Missouri, 63110, United States
- Department of Radiology, The Taylor Family Institute for Innovative Psychiatric Research, Washington University in St. Louis, St. Louis, Missouri, 63110, United States
- Department of Anatomy and Neurobiology, Washington University in St. Louis School of Medicine, St. Louis, Missouri, 63110, United States
| | - Douglas F. Covey
- Department of Developmental Biology, Washington University in St. Louis School of Medicine, St. Louis, Missouri, 63110, United States
- Department of Anesthesiology, Washington University in St. Louis School of Medicine, St. Louis, Missouri, 63110, United States
- Department of Psychiatry, Washington University in St. Louis School of Medicine, St. Louis, Missouri, 63110, United States
- Department of Radiology, The Taylor Family Institute for Innovative Psychiatric Research, Washington University in St. Louis, St. Louis, Missouri, 63110, United States
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Szánti-Pintér E, Csók Z, Berente Z, Kollár L, Skoda-Földes R. Synthesis of novel 13α-18-nor-16-carboxamido steroids via a palladium-catalyzed aminocarbonylation reaction. Steroids 2013; 78:1177-82. [PMID: 24012726 DOI: 10.1016/j.steroids.2013.08.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2013] [Revised: 08/07/2013] [Accepted: 08/20/2013] [Indexed: 10/26/2022]
Abstract
13α-18-nor-16-Carboxamido steroids were synthesized via a palladium-catalyzed aminocarbonylation reaction of the corresponding iodoalkenes. The starting material was an unnatural 13α-16-keto steroid, obtained by a Wagner-Meerwein rearrangement of a 16α,17α-epoxide in the presence of [BMIM][BF4]. The 13α-16-keto steroid was converted to a mixture of 16-iodo-16-ene and 16-iodo-15-ene derivatives in two steps by Barton's methodology. Aminocarbonylation of the steroidal alkenyl iodides was carried out using different primary and secondary amines as nucleophiles. The products, 16-carboxamido-16-ene and 16-carboxamido-15-ene derivatives, were obtained in good yields and were characterized by (1)H and (13)C NMR, IR and MS. The reduction of the above two unsaturated carboxamides resulted in the same product, 17α-methyl-16α-carboxamido-androstane.
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Affiliation(s)
- Eszter Szánti-Pintér
- University of Pannonia, Institute of Chemistry, Department of Organic Chemistry, Egyetem u. 10, P.O. Box 158, H-8200 Veszprém, Hungary
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Molecular Structure of Methyl 1-Isopropenyl- 5a,5b,8,8,11a-Pentamethyl-9-OXO-10-[(E)-1-Phenylmethylidene] Perhydrocyclopent [a]Chrysene-3a-Carboxylate. J STRUCT CHEM+ 2010. [DOI: 10.1007/s10947-010-0122-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Affiliation(s)
- James R Hanson
- Department of Chemistry, University of Sussex, Brighton, Sussex, BN1 9QJ, UK
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