1
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Deng C, Song BQ, Sensharma D, Gao MY, Bezrukov AA, Nikolayenko VI, Lusi M, Mukherjee S, Zaworotko MJ. Effect of Extra-Framework Anion Substitution on the Properties of a Chiral Crystalline Sponge. CRYSTAL GROWTH & DESIGN 2023; 23:8139-8146. [PMID: 37937187 PMCID: PMC10626566 DOI: 10.1021/acs.cgd.3c00857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 09/13/2023] [Indexed: 11/09/2023]
Abstract
Chiral metal-organic materials, CMOMs, are of interest as they can offer selective binding sites for chiral guests. Such binding sites can enable CMOMs to serve as chiral crystalline sponges (CCSs) to determine molecular structure and/or purify enantiomers. We recently reported on the chiral recognition properties of a homochiral cationic diamondoid, dia, network {[Ni(S-IDEC)(bipy)(H2O)][NO3]}n (S-IDEC = S-indoline-2-carboxylicate, bipy = 4,4'-bipyridine), CMOM-5[NO3]. The modularity of CMOM-5[NO3] means there are five feasible approaches to fine-tune structures and properties via substitution of one or more of the following components: metal cation (Ni2+); bridging ligand (S-IDEC); linker (bipy); extra-framework anion (NO3-); and terminal ligand (H2O). Herein, we report the effect of anion substitution on the CCS properties of CMOM-5[NO3] by preparing and characterizing {[Ni(S-IDEC)(bipy)(H2O)][BF4]}n, CMOM-5[BF4]. The chiral channels in CMOM-5[BF4] enabled it to function as a CCS for determination of the absolute crystal structures of both enantiomers of three chiral compounds: 1-phenyl-1-butanol (1P1B); methyl mandelate (MM); ethyl mandelate (EM). Chiral resolution experiments revealed CMOM-5[BF4] to be highly selective toward the S-isomers of MM and EM with enantiomeric excess, ee, values of 82.6 and 78.4%, respectively. The ee measured for S-EM surpasses the 64.3% exhibited by [DyNaL(H2O)4] 6H2O and far exceeds that of CMOM-5[NO3] (6.0%). Structural studies of the binding sites in CMOM-5[BF4] provide insight into their high enantioselectivity.
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Affiliation(s)
- Chenghua Deng
- Bernal Institute, Department
of Chemical Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Bai-Qiao Song
- Bernal Institute, Department
of Chemical Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Debobroto Sensharma
- Bernal Institute, Department
of Chemical Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Mei-Yan Gao
- Bernal Institute, Department
of Chemical Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Andrey A. Bezrukov
- Bernal Institute, Department
of Chemical Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Varvara I. Nikolayenko
- Bernal Institute, Department
of Chemical Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Matteo Lusi
- Bernal Institute, Department
of Chemical Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Soumya Mukherjee
- Bernal Institute, Department
of Chemical Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Michael J. Zaworotko
- Bernal Institute, Department
of Chemical Sciences, University of Limerick, Limerick V94 T9PX, Ireland
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2
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Deng C, Song BQ, Lusi M, Bezrukov AA, Haskins MM, Gao MY, Peng YL, Ma JG, Cheng P, Mukherjee S, Zaworotko MJ. Crystal Engineering of a Chiral Crystalline Sponge That Enables Absolute Structure Determination and Enantiomeric Separation. CRYSTAL GROWTH & DESIGN 2023; 23:5211-5220. [PMID: 37426545 PMCID: PMC10326857 DOI: 10.1021/acs.cgd.3c00446] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/06/2023] [Indexed: 07/11/2023]
Abstract
Chiral metal-organic materials (CMOMs), can offer molecular binding sites that mimic the enantioselectivity exhibited by biomolecules and are amenable to systematic fine-tuning of structure and properties. Herein, we report that the reaction of Ni(NO3)2, S-indoline-2-carboxylic acid (S-IDECH), and 4,4'-bipyridine (bipy) afforded a homochiral cationic diamondoid, dia, network, [Ni(S-IDEC)(bipy)(H2O)][NO3], CMOM-5. Composed of rod building blocks (RBBs) cross-linked by bipy linkers, the activated form of CMOM-5 adapted its pore structure to bind four guest molecules, 1-phenyl-1-butanol (1P1B), 4-phenyl-2-butanol (4P2B), 1-(4-methoxyphenyl)ethanol (MPE), and methyl mandelate (MM), making it an example of a chiral crystalline sponge (CCS). Chiral resolution experiments revealed enantiomeric excess, ee, values of 36.2-93.5%. The structural adaptability of CMOM-5 enabled eight enantiomer@CMOM-5 crystal structures to be determined. The five ordered crystal structures revealed that host-guest hydrogen-bonding interactions are behind the observed enantioselectivity, three of which represent the first crystal structures determined of the ambient liquids R-4P2B, S-4P2B, and R-MPE.
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Affiliation(s)
- Chenghua Deng
- Bernal
Institute, Department of Chemical Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Bai-Qiao Song
- Bernal
Institute, Department of Chemical Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Matteo Lusi
- Bernal
Institute, Department of Chemical Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Andrey A. Bezrukov
- Bernal
Institute, Department of Chemical Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Molly M. Haskins
- Bernal
Institute, Department of Chemical Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Mei-Yan Gao
- Bernal
Institute, Department of Chemical Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Yun-Lei Peng
- Bernal
Institute, Department of Chemical Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Jian-Gong Ma
- Department
of Chemistry and Key Laboratory of Advanced Energy Material Chemistry,
College of Chemistry, Nankai University, Tianjin 300071, China
| | - Peng Cheng
- Department
of Chemistry and Key Laboratory of Advanced Energy Material Chemistry,
College of Chemistry, Nankai University, Tianjin 300071, China
| | - Soumya Mukherjee
- Bernal
Institute, Department of Chemical Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Michael J. Zaworotko
- Bernal
Institute, Department of Chemical Sciences, University of Limerick, Limerick V94 T9PX, Ireland
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3
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Liu X, Liu H, Bian C, Wang KH, Wang J, Huang D, Su Y, Lv X, Hu Y. Synthesis of 3-Trifluoromethyl-1,2,4-triazolines and 1,2,4-Triazoles via Tandem Addition/Cyclization of Trifluoromethyl N-Acylhydrazones with Cyanamide. J Org Chem 2022; 87:5882-5892. [PMID: 35412831 DOI: 10.1021/acs.joc.2c00176] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A tandem addition/cyclization reaction between trifluoromethyl N-acylhydrazones and cyanamide is described, which provides a novel and efficient process for the synthesis of polysubstituted 3-trifluoromethyl-1,2,4-triazolines and their derivatives. The method has the advantages of mild reaction conditions, a broad substrate scope, good product yields, and atom economy.
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Affiliation(s)
- Xiaoling Liu
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, China
| | - Haimei Liu
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, China
| | - Chang Bian
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, China
| | - Ke-Hu Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, China
| | - Junjiao Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, China
| | - Danfeng Huang
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, China
| | - Yingpeng Su
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, China
| | - Xiaobo Lv
- Shanghai Sinofluoro Chemicals Co., Ltd., Shanghai 201321, China
| | - Yulai Hu
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, China.,State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
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4
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Yunusova S, Bolotin DS, Suslonov VV, Vovk MA, Tolstoy PM, Kukushkin VY. 3-Dialkylamino-1,2,4-triazoles via Zn II-Catalyzed Acyl Hydrazide-Dialkylcyanamide Coupling. ACS OMEGA 2018; 3:7224-7234. [PMID: 31458884 PMCID: PMC6644373 DOI: 10.1021/acsomega.8b01047] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 06/15/2018] [Indexed: 05/08/2023]
Abstract
Zinc(II)-catalyzed (10 mol % ZnCl2) coupling of acyl hydrazides and dialkylcyanamides in ethanol leads to 3-dialkylamino-1,2,4-triazoles (76-99%; 17 examples). This reaction represents a novel, straightforward, and high-yielding approach to practically important 3-NR2-1,2,4-triazoles, which utilizes commercially available and/or easily generated substrates. Seventeen new 3-NR2-1,2,4-triazoles were characterized by HRESI+-MS and IR, 1H, and 13C{1H} NMR spectroscopies and five species additionally by single-crystal X-ray diffraction (XRD). The ZnII-catalyzed reaction proceeds via initial generation of the [Zn{RC(=O)NHNH2}3](ZnCl4) complexes (exemplified by isolation of the complex with R = Ph, 76%; characterized by HRESI+-MS, IR, CP-MAS TOSS 13C{1H} NMR, and XRD). Electronic effects of substituents at the acyl hydrazide moiety do not significantly affect the reaction rate and the yield of the target triazoles, whereas the steric hindrances reduce the reaction rate without affecting the yield of the heterocycles.
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Affiliation(s)
- Sevilya
N. Yunusova
- Institute
of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, Saint Petersburg 199034, Russian Federation
| | - Dmitrii S. Bolotin
- Institute
of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, Saint Petersburg 199034, Russian Federation
- E-mail: (D.S.B.)
| | - Vitalii V. Suslonov
- Center for X-ray Diffraction
Studies, Center for Magnetic Resonance, Saint Petersburg
State University, Universitetskii
Pr., 26, Saint Petersburg 199034, Russian Federation
| | - Mikhail A. Vovk
- Center for X-ray Diffraction
Studies, Center for Magnetic Resonance, Saint Petersburg
State University, Universitetskii
Pr., 26, Saint Petersburg 199034, Russian Federation
| | - Peter M. Tolstoy
- Center for X-ray Diffraction
Studies, Center for Magnetic Resonance, Saint Petersburg
State University, Universitetskii
Pr., 26, Saint Petersburg 199034, Russian Federation
| | - Vadim Yu. Kukushkin
- Institute
of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, Saint Petersburg 199034, Russian Federation
- E-mail: (V.Y.K.)
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5
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Teleb M, Kuppast B, Spyridaki K, Liapakis G, Fahmy H. Synthesis of 2-imino and 2-hydrazono thiazolo[4,5- d ]pyrimidines as corticotropin releasing factor (CRF) antagonists. Eur J Med Chem 2017; 138:900-908. [DOI: 10.1016/j.ejmech.2017.07.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 06/27/2017] [Accepted: 07/11/2017] [Indexed: 12/18/2022]
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6
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Tereshchenko AD, Myronchuk JS, Leitchenko LD, Knysh IV, Tokmakova GO, Litsis OO, Tolmachev A, Liubchak K, Mykhailiuk P. Synthesis of 3-oxadiazolyl/triazolyl morpholines: Novel scaffolds for drug discovery. Tetrahedron 2017. [DOI: 10.1016/j.tet.2016.12.052] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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7
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Shen J, Wong B, Gu C, Zhang H. Negishi Approach to 1,5-Disubstituted 3-Amino-1H-1,2,4-triazoles. Org Lett 2015; 17:4678-81. [DOI: 10.1021/acs.orglett.5b02021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jeff Shen
- Small
Molecule Process Chemistry and ‡Small Molecule Analytical Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Brian Wong
- Small
Molecule Process Chemistry and ‡Small Molecule Analytical Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Chunang Gu
- Small
Molecule Process Chemistry and ‡Small Molecule Analytical Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Haiming Zhang
- Small
Molecule Process Chemistry and ‡Small Molecule Analytical Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
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8
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Gogoi A, Guin S, Rajamanickam S, Rout SK, Patel BK. Synthesis of 1,2,4-Triazoles via Oxidative Heterocyclization: Selective C–N Bond Over C–S Bond Formation. J Org Chem 2015; 80:9016-27. [DOI: 10.1021/acs.joc.5b00956] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Anupal Gogoi
- Department
of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Srimanta Guin
- Department
of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Suresh Rajamanickam
- Department
of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Saroj Kumar Rout
- Department
of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Bhisma K. Patel
- Department
of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
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9
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Shen J, Zhang H. Synthesis of 1-substituted 3-amino-1H-1,2,4-triazoles from ethyl N-(5-phenyl-1,2,4-oxadiazol-3-yl)formimidate. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.06.094] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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10
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Han YT, Yang SM, Wang XY, Li FN. Design, synthesis and biological evaluation of B-region modified diarylalkyl amide analogues as novel TRPV1 antagonists. Arch Pharm Res 2013; 37:440-51. [PMID: 23943439 DOI: 10.1007/s12272-013-0228-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2013] [Accepted: 07/26/2013] [Indexed: 11/29/2022]
Abstract
Design, synthesis and biological evaluation of B-region, known to be a dipolar interacting pharmacophore, modified diarylalkyl amide analogues for novel TRPV1 (transient receptor potential channel, vanilloid subfamily member 1) antagonists was described. A variety of moieties including guanidines, heterocyclic rings, cinnamides, and α-substituted acetamides were introduced at the B-region. TRPV1 antagonistic activities of these analogues were evaluated by (45)Ca(2+) uptake assay in rat DRG neuron. In particular, α,α-difluoroamide 53 exhibited 3-fold more potent TRPV1 antagonistic activity (IC50 = 0.058 μM) than the parent amide analogue 6.
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Affiliation(s)
- Young Taek Han
- College of Pharmacy, Woosuk University, Wanju, 565-701, Republic of Korea
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11
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Mori Y, Ogawa Y, Mochizuki A, Nakamura Y, Fujimoto T, Sugita C, Miyazaki S, Tamaki K, Nagayama T, Nagai Y, Inoue SI, Chiba K, Nishi T. Synthesis and optimization of novel (3S,5R)-5-(2,2-dimethyl-5-oxo-4-phenylpiperazin-1-yl)piperidine-3-carboxamides as orally active renin inhibitors. Bioorg Med Chem 2013; 21:5907-22. [PMID: 23886807 DOI: 10.1016/j.bmc.2013.06.057] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2013] [Revised: 06/22/2013] [Accepted: 06/24/2013] [Indexed: 11/26/2022]
Abstract
We report synthesis and optimization of a series of (3S,5R)-5-(2,2-dimethyl-5-oxo-4-phenylpiperazin-1-yl)piperidine-3-carboxamides as renin inhibitors. Chemical modification of P1', P2' and P3 portions led to a promising 3,5-disubstituted piperidine 32o showing high renin inhibitory activity and favorable oral exposure in both rats and cynomolgus monkeys with acceptable CYP and hERG current inhibition. Compound 32o exhibited a significant blood pressure lowering effect by oral administration in two hypertensive animal models, double transgenic rats and furosemide pretreated cynomolgus monkeys.
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Affiliation(s)
- Yutaka Mori
- New Modality Research Laboratories, Daiichi Sankyo Co., Ltd, Shinagawa-ku, Tokyo, Japan.
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12
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Guin S, Rout SK, Khatun N, Ghosh T, Patel BK. Tandem synthesis of [1,2,4]-triazoles mediated by iodine—a regioselective approach. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.04.042] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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13
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Palumbo Piccionello A, Guarcello A, Buscemi S, Vivona N, Pace A. Synthesis of Amino-1,2,4-triazoles by Reductive ANRORC Rearrangements of 1,2,4-Oxadiazoles. J Org Chem 2010; 75:8724-7. [DOI: 10.1021/jo102049r] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Antonio Palumbo Piccionello
- Dipartimento di Chimica Organica “E. Paternò”, Università degli Studi di Palermo, Viale delle Scienze - Parco d'Orleans II, I-90128 Palermo, Italy
| | - Annalisa Guarcello
- Dipartimento di Chimica Organica “E. Paternò”, Università degli Studi di Palermo, Viale delle Scienze - Parco d'Orleans II, I-90128 Palermo, Italy
| | - Silvestre Buscemi
- Dipartimento di Chimica Organica “E. Paternò”, Università degli Studi di Palermo, Viale delle Scienze - Parco d'Orleans II, I-90128 Palermo, Italy
| | - Nicolò Vivona
- Dipartimento di Chimica Organica “E. Paternò”, Università degli Studi di Palermo, Viale delle Scienze - Parco d'Orleans II, I-90128 Palermo, Italy
| | - Andrea Pace
- Dipartimento di Chimica Organica “E. Paternò”, Università degli Studi di Palermo, Viale delle Scienze - Parco d'Orleans II, I-90128 Palermo, Italy
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14
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Abstract
Corticotropin-releasing factor (CRF) coordinates the neural, endocrine and immune responses of the body to stress. Therefore, CRF receptors are important targets for the design of drugs for depression, anxiety and stress-related disorders. Several laboratories have published extensive preclinical and limited clinical research into the role of CRF in human disease. This review covers developments in the patent literature during 2002 - 2006 and outlines the prospects for CRF-based therapy for mental illness.
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Affiliation(s)
- Paul J Gilligan
- Bristol-Myers Squibb Co., 311 Pennington Rocky Hill Road, Hopewell, NJ 08543, USA.
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15
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Progress in corticotropin-releasing factor-1 antagonist development. Drug Discov Today 2010; 15:371-83. [PMID: 20206287 DOI: 10.1016/j.drudis.2010.02.011] [Citation(s) in RCA: 132] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2009] [Revised: 12/16/2009] [Accepted: 02/24/2010] [Indexed: 01/02/2023]
Abstract
Corticotropin releasing factor (CRF) receptor antagonists have been sought since the stress-secreted peptide was isolated in 1981. Although evidence is mixed concerning the efficacy of CRF(1) antagonists as antidepressants, CRF(1) antagonists might be novel pharmacotherapies for anxiety and addiction. Progress in understanding the two-domain model of ligand-receptor interactions for CRF family receptors might yield chemically novel CRF(1) receptor antagonists, including peptide CRF(1) antagonists, antagonists with signal transduction selectivity and nonpeptide CRF(1) antagonists that act via the extracellular (rather than transmembrane) domains. Novel ligands that conform to the prevalent pharmacophore and exhibit drug-like pharmacokinetic properties have been identified. The therapeutic utility of CRF(1) antagonists should soon be clearer: several small molecules are currently in Phase II/III clinical trials for depression, anxiety and irritable bowel syndrome.
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16
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Parmar K, Suthar B, Prajapati S, Suthar A. Synthesis and biological activity of novel 1,3,5-trisubstituted 1,2,4-triazole derivatives. J Heterocycl Chem 2010. [DOI: 10.1002/jhet.291] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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17
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Ye Y, Liao Q, Wei J, Gao Q. 3D-QSAR study of corticotropin-releasing factor 1 antagonists and pharmacophore-based drug design. Neurochem Int 2010; 56:107-17. [DOI: 10.1016/j.neuint.2009.09.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2009] [Revised: 09/14/2009] [Accepted: 09/15/2009] [Indexed: 11/28/2022]
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18
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Noël R, Song X, Jiang R, Chalmers MJ, Griffin PR, Kamenecka TM. Efficient methodology for the synthesis of 3-amino-1,2,4-triazoles. J Org Chem 2009; 74:7595-7. [PMID: 19731897 DOI: 10.1021/jo9016502] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A general and efficient method for the preparation of 3-amino-1,2,4-triazoles has been developed. The desired 3-amino-1,2,4-triazoles (1) were prepared in good overall yield via two convergent routes. The key intermediate within both routes is substituted hydrazinecarboximidamide derivative 2.
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Affiliation(s)
- Romain Noël
- Department of Molecular Therapeutics and Translational Research Institute, The Scripps Research Institute, Scripps Florida, 130 Scripps Way No. A2A, Jupiter, Florida 33458, USA
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19
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Miller DC, Klute W, Calabrese A, Brown AD. Optimising metabolic stability in lipophilic chemical space: The identification of a metabolically stable pyrazolopyrimidine CRF-1 receptor antagonist. Bioorg Med Chem Lett 2009; 19:6144-7. [DOI: 10.1016/j.bmcl.2009.09.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2009] [Revised: 09/03/2009] [Accepted: 09/04/2009] [Indexed: 11/26/2022]
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20
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Piccionello AP, Pace A, Buscemi S, Vivona N. 1,2,4-Oxadiazole rearrangements involving an NNC side-chain sequence. Org Lett 2009; 11:4018-20. [PMID: 19708710 DOI: 10.1021/ol901687n] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The thermal rearrangement of N-1,2,4-oxadiazol-3-yl-hydrazones into 1,2,4-triazole derivatives is reported. This represents the first example of a three-atom side-chain rearrangement involving an NNC sequence linked at the C(3) of the oxadiazole. The reactions carried out under solvent-free conditions produced good to high yields of the final products.
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Affiliation(s)
- Antonio Palumbo Piccionello
- Dipartimento di Chimica Organica E. Paternò, Università degli Studi di Palermo,Viale delle Scienze - Parco d'Orleans II, I-90128 Palermo, Italy.
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21
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Yoon T, De Lombaert S, Brodbeck R, Gulianello M, Chandrasekhar J, Horvath RF, Ge P, Kershaw MT, Krause JE, Kehne J, Hoffman D, Doller D, Hodgetts KJ. The design, synthesis and structure-activity relationships of 1-aryl-4-aminoalkylisoquinolines: a novel series of CRF-1 receptor antagonists. Bioorg Med Chem Lett 2008; 18:891-6. [PMID: 18180159 DOI: 10.1016/j.bmcl.2007.12.050] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2007] [Revised: 12/18/2007] [Accepted: 12/19/2007] [Indexed: 11/30/2022]
Abstract
The design, synthesis and structure-activity relationships of a novel series of CRF-1 receptor antagonist, the 1-aryl-4-alkylaminoisoquinolines, is described. The effects of substitution on the aromatic ring, the amino group and the isoquinoline core on CRF-1 receptor binding were investigated.
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Affiliation(s)
- Taeyoung Yoon
- Neurogen Corporation, 35 North East Industrial Road, Branford, CT 06405, USA
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Hoare SRJ, Brown BT, Santos MA, Malany S, Betz SF, Grigoriadis DE. Single amino acid residue determinants of non-peptide antagonist binding to the corticotropin-releasing factor1 (CRF1) receptor. Biochem Pharmacol 2006; 72:244-55. [PMID: 16750175 DOI: 10.1016/j.bcp.2006.04.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2006] [Accepted: 04/11/2006] [Indexed: 10/24/2022]
Abstract
The molecular interactions between non-peptide antagonists and the corticotropin-releasing factor type 1 (CRF1) receptor are poorly understood. A CRF1 receptor mutation has been identified that reduces binding affinity of the non-peptide antagonist NBI 27914 (M276I in transmembrane domain 5). We have investigated the mechanism of the mutation's effect using a combination of peptide and non-peptide ligands and receptor mutations. The M276I mutation reduced binding affinity of standard non-peptide antagonists 5-75-fold while having no effect on peptide ligand binding. We hypothesized that the side chain of isoleucine, beta-branched and so rotationally constrained when within an alpha-helix, introduces a barrier to non-peptide antagonist binding. In agreement with this hypothesis, mutation of M276 to the rotationally constrained valine produced similar reductions of affinity as M276I mutation, whereas mutation to leucine (with an unbranched beta-carbon) minimally affected non-peptide antagonist affinity. Mutation to alanine did not appreciably affect non-peptide antagonist affinity, implying the methionine side chain does not contribute directly to binding. Three observations suggested M276I/V mutations interfere with binding of the heterocyclic core of the compounds: (1) all compounds affected by M276I/V mutations possess a planar heterocyclic core. (2) None of the M276 mutations affected binding of an acylic compound. (3) The mutations differentially affected affinity of two compounds that differ only by core methylation. These findings imply that non-peptide antagonists, and specifically the heterocyclic core of such molecules, bind in the vicinity of M276 of the CRF1 receptor. M276 mutations did not affect peptide ligand binding and this residue is distant from determinants of peptide binding (predominantly in the extracellular regions), providing molecular evidence for non-overlapping (allosteric) binding sites for peptide and non-peptide ligands within the CRF1 receptor.
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Affiliation(s)
- Sam R J Hoare
- Department of Discovery Biology, Neurocrine Biosciences Inc., 12790 El Camino Real, San Diego, CA 92130, USA.
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