1
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Volpi G, Laurenti E, Rabezzana R. Imidazopyridine Family: Versatile and Promising Heterocyclic Skeletons for Different Applications. Molecules 2024; 29:2668. [PMID: 38893542 PMCID: PMC11173518 DOI: 10.3390/molecules29112668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2024] [Revised: 05/30/2024] [Accepted: 05/31/2024] [Indexed: 06/21/2024] Open
Abstract
In recent years, there has been increasing attention focused on various products belonging to the imidazopyridine family; this class of heterocyclic compounds shows unique chemical structure, versatile optical properties, and diverse biological attributes. The broad family of imidazopyridines encompasses different heterocycles, each with its own specific properties and distinct characteristics, making all of them promising for various application fields. In general, this useful category of aromatic heterocycles holds significant promise across various research domains, spanning from material science to pharmaceuticals. The various cores belonging to the imidazopyridine family exhibit unique properties, such as serving as emitters in imaging, ligands for transition metals, showing reversible electrochemical properties, and demonstrating biological activity. Recently, numerous noteworthy advancements have emerged in different technological fields, including optoelectronic devices, sensors, energy conversion, medical applications, and shining emitters for imaging and microscopy. This review intends to provide a state-of-the-art overview of this framework from 1955 to the present day, unveiling different aspects of various applications. This extensive literature survey may guide chemists and researchers in the quest for novel imidazopyridine compounds with enhanced properties and efficiency in different uses.
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Affiliation(s)
- Giorgio Volpi
- Department of Chemistry, University of Turin, Via Pietro Giuria 7, 10125 Torino, Italy; (E.L.)
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2
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Truong DT, Ho K, Nhi HTY, Nguyen VH, Dang TT, Nguyen MT. Imidazole[1,5-a]pyridine derivatives as EGFR tyrosine kinase inhibitors unraveled by umbrella sampling and steered molecular dynamics simulations. Sci Rep 2024; 14:12218. [PMID: 38806555 PMCID: PMC11133355 DOI: 10.1038/s41598-024-62743-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Accepted: 05/21/2024] [Indexed: 05/30/2024] Open
Abstract
Although the use of the tyrosine kinase inhibitors (TKIs) has been proved that it can save live in a cancer treatment, the currently used drugs bring in many undesirable side-effects. Therefore, the search for new drugs and an evaluation of their efficiency are intensively carried out. Recently, a series of eighteen imidazole[1,5-a]pyridine derivatives were synthetized by us, and preliminary analyses pointed out their potential to be an important platform for pharmaceutical development owing to their promising actions as anticancer agents and enzyme (kinase, HIV-protease,…) inhibitors. In the present theoretical study, we further analyzed their efficiency in using a realistic scenario of computational drug design. Our protocol has been developed to not only observe the atomistic interaction between the EGFR protein and our 18 novel compounds using both umbrella sampling and steered molecular dynamics simulations, but also determine their absolute binding free energies. Calculated properties of the 18 novel compounds were in detail compared with those of two known drugs, erlotinib and osimertinib, currently used in cancer treatment. Inspiringly the simulation results promote three imidazole[1,5-a]pyridine derivatives as promising inhibitors into a further step of clinical trials.
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Affiliation(s)
- Duc Toan Truong
- Laboratory for Chemical Computation and Modeling, Institute for Computational Science and Artificial Intelligence, Van Lang University, Ho Chi Minh City, 70000, Vietnam
- Faculty of Applied Technology, School of Technology, Van Lang University, Ho Chi Minh City, 70000, Vietnam
| | - Kiet Ho
- Institute for Computational Science and Technology (ICST), Quang Trung Software City, Ho Chi Minh City, 70000, Vietnam
| | - Huynh Thi Yen Nhi
- Laboratory for Chemical Computation and Modeling, Institute for Computational Science and Artificial Intelligence, Van Lang University, Ho Chi Minh City, 70000, Vietnam
| | - Van Ha Nguyen
- Faculty of Chemistry, VNU University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi, 11021, Vietnam
| | - Tuan Thanh Dang
- Faculty of Chemistry, VNU University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi, 11021, Vietnam
| | - Minh Tho Nguyen
- Laboratory for Chemical Computation and Modeling, Institute for Computational Science and Artificial Intelligence, Van Lang University, Ho Chi Minh City, 70000, Vietnam.
- Faculty of Applied Technology, School of Technology, Van Lang University, Ho Chi Minh City, 70000, Vietnam.
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3
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Peng J, Li S, Huang J, Meng Q, Wang L, Xin W, Li W, Zhou W, Zhang L. Construction of Imidazole-Fused-Ring Systems by Iron-Catalyzed C(sp 3)-H Amination-Cyclization under Aerobic Conditions. J Org Chem 2023; 88:16581-16588. [PMID: 37976463 DOI: 10.1021/acs.joc.3c02078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
An iron-catalyzed efficient C-H amination for the construction of imidazole-fused-ring systems was developed under aerobic conditions. Compared to previous studies, this work exhibited green features. The reaction was conducted in the green solvent anisole, with water as the only byproduct. Four C(sp3)-H bonds were cleaved and three C-N bonds were formed in this transformation. Imidazo[1,5-a]pyridine-, imidazo[5,1-b]oxazole-, imidazo[5,1-b]thiazole-, imidazo[1,5-a]pyrazine-, and imidazo[1,5-a]imidazole-related N-heterocycles were obtained in acceptable-to-excellent yield.
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Affiliation(s)
- Jiangling Peng
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, Guangdong 510006, China
| | - Shijia Li
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, Guangdong 510006, China
| | - Junwei Huang
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, Guangdong 510006, China
| | - Qianli Meng
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, Guangdong 510006, China
| | - Lixin Wang
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, Guangdong 510006, China
| | - Wenlong Xin
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, Guangdong 510006, China
| | - Weini Li
- Department of Diabetes Complications and Metabolism, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute of City of Hope, Duarte, California91010, United States
| | - Wei Zhou
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, Guangdong 510006, China
| | - Lanyue Zhang
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, Guangdong 510006, China
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4
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Agafonova AV, Golubev AA, Smetanin IA, Khlebnikov AF, Spiridonova DV, Novikov MS. Divergent Synthesis of Pyrazolo[1,5- a]pyridines and Imidazo[1,5- a]pyridines via Reagent-Controlled Cleavage of the C-N or C-C Azirine Bond in 2-Pyridylazirines. Org Lett 2023; 25:7165-7169. [PMID: 37738046 DOI: 10.1021/acs.orglett.3c02696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
The three-membered ring in 2-(2-pyridyl)azirine-2-carboxylic esters and thioesters can undergo selective cleavage of either the N-C2 bond under copper(II) catalysis or the C-C bond under the action of HCl to provide isomeric azirine ring expansion products of pyrazolo[1,5-a]pyridine or imidazo[1,5-a]pyridine series, respectively. Mild catalytic reaction conditions for the formation of pyrazolopyridines make it possible to obtain them directly from 4-bromoisoxazoles by a one-pot, three-stage procedure without isolating the intermediate 2-bromoazirines and 2-(2-pyridyl)azirines.
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Affiliation(s)
- Anastasiya V Agafonova
- Institute of Chemistry, St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
| | - Artem A Golubev
- Institute of Chemistry, St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
| | - Ilia A Smetanin
- Institute of Chemistry, St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
| | - Alexander F Khlebnikov
- Institute of Chemistry, St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
| | - Dar'ya V Spiridonova
- Institute of Chemistry, St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
| | - Mikhail S Novikov
- Institute of Chemistry, St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
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5
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Begunov RS, Sokolov AA. Biological Activity of Condensed Pyridine Derivatives with a Bridgehead Nitrogen Atom. Pharm Chem J 2023. [DOI: 10.1007/s11094-023-02827-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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6
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Nirogi R, Grandhi VR, Medapati R, Ganuga N, Abraham R, Thentu JB, Palacharla VRC, Petlu S, Srirangavaram M, Subramanian R, Ravella SR, Gagginapally SR, Benade V, Jayarajan P, Mohammed AR. Usmarapride (SUVN-D4010), a 5-HT4 receptor partial agonist for the potential treatment of Alzheimer's disease: Behavioural, neurochemical and pharmacological profiling. Eur J Pharmacol 2023; 947:175625. [PMID: 36997046 DOI: 10.1016/j.ejphar.2023.175625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Revised: 02/24/2023] [Accepted: 02/24/2023] [Indexed: 03/30/2023]
Abstract
Alzheimer's disease (AD) is a progressive neurodegenerative disorder which affects cognitive functions with negative impact on day to day activities and an ultimate loss of independent living. Current standard of care (SOC) for AD, viz. donepezil, rivastigmine, galantamine, memantine etc. either alone or in combination show modest efficacy without changing the course of the disease. On prolonged treatment, side effects are more common with an eventual loss of efficacy. Aducanumab, a monoclonal antibody is a disease modifying therapeutic agent targeting the toxic amyloid beta (Aβ) proteins for its clearance. However, it is found to have only modest efficacy in AD patients and its approval by FDA is controversial. Alternate, effective and safe therapeutics are need of the hour, as AD cases are expected to be doubled by 2050. Recently, 5-HT4 receptors have been envisioned as target for alleviating AD associated cognitive impairment with potential disease modifying ability impacting disease progression. Usmarapride is a 5-HT4 receptor partial agonist, being developed for the possible treatment of AD with symptomatic and disease modifying potential. Usmarapride demonstrated promising effects in ameliorating cognitive deficits in diverse animal models of episodic, working, social, and emotional memories. Usmarapride produced elevation in cortical acetylcholine in rats. Furthermore, usmarapride increased levels of soluble amyloid precursor protein alpha, a potential mechanism to reverse toxic Aβ peptide pathology. Usmarapride also potentiated the pharmacological effects of donepezil in animal models. To conclude, usmarapride may be a promising intervention for alleviating the cognitive dysfunction in AD patients with disease modifying potential.
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Phuc BV, Nguyen NT, Van NTH, Nguyen TL, Nguyen VH, Tran CM, Nguyen H, Nguyen MT, Hung TQ, Dang TT. Facile iodine-promoted synthesis of bis(1-imidazo[1,5- a]pyridyl)arylmethanes and exploration of applications. Chem Commun (Camb) 2023; 59:1947-1950. [PMID: 36637415 DOI: 10.1039/d2cc05419a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A practical strategy for the iodine-promoted synthesis of bis(1-imidazo[1,5-a]pyridyl)arylmethane and its derivatives has been developed. These compounds exhibit high cytotoxicity toward various cancer cell lines and moreover they are promising ligands for the Cu-catalysed synthesis of quinolines.
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Affiliation(s)
- Ban Van Phuc
- Institute of Chemistry, Vietnamese Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Hanoi, Vietnam.
| | - Nina Thi Nguyen
- Faculty of Chemistry, VNU-Hanoi University of Science, 19 Le Thanh Tong, Hanoi, Vietnam.
| | - Nguyen Thi Hong Van
- Faculty of Chemistry, VNU-Hanoi University of Science, 19 Le Thanh Tong, Hanoi, Vietnam.
| | - Thanh Luan Nguyen
- Faculty of Chemistry, VNU-Hanoi University of Science, 19 Le Thanh Tong, Hanoi, Vietnam.
| | - Van Ha Nguyen
- Faculty of Chemistry, VNU-Hanoi University of Science, 19 Le Thanh Tong, Hanoi, Vietnam.
| | - Cong Minh Tran
- Faculty of Chemistry, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi, Vietnam
| | - Hien Nguyen
- Faculty of Chemistry, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi, Vietnam
| | - Minh Tho Nguyen
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven B-3001, Belgium
| | - Tran Quang Hung
- Institute of Chemistry, Vietnamese Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Hanoi, Vietnam. .,Graduate University of Science and Technology, Vietnamese Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Hanoi, Vietnam
| | - Tuan Thanh Dang
- Faculty of Chemistry, VNU-Hanoi University of Science, 19 Le Thanh Tong, Hanoi, Vietnam.
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8
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Meanwell NA, Loiseleur O. Applications of Isosteres of Piperazine in the Design of Biologically Active Compounds: Part 2. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:10972-11004. [PMID: 35675052 DOI: 10.1021/acs.jafc.2c00729] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Applications of piperazine and homopiperazine in drug design are well-established, and these heterocycles have found use as both scaffolding and terminal elements and also as a means of introducing a water-solubilizing element into a molecule. In the accompanying review (10.1021/acs.jafc.2c00726), we summarized applications of piperazine and homopiperazine and their fused ring homologues in bioactive compound design along with illustrations of the use of 4-substituted piperidines and a sulfoximine-based mimetic. In this review, we discuss applications of pyrrolidine- and fused-pyrrolidine-based mimetics of piperazine and homopiperazine and illustrate derivatives of azetidine that include stretched and spirocyclic motifs, along with applications of a series of diaminocycloalkanes.
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Affiliation(s)
- Nicholas A Meanwell
- Small Molecule Drug Discovery, Bristol Myers Squibb Research and Early Development, Post Office Box 4000, Princeton, New Jersey 08543, United States
| | - Olivier Loiseleur
- Syngenta Crop Protection Research, Schaffhauserstrasse, CH-4332 Stein, Switzerland
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9
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Cheng D, Meng XZ, Tian F, Yan D, Wang X, Qian X, Wang J. Crystal structure and Hirshfeld surface analysis of 4-(3-methoxyphenyl)-2,6-diphenylpyridine. Acta Crystallogr E Crystallogr Commun 2022; 78:932-935. [PMID: 36072513 PMCID: PMC9443808 DOI: 10.1107/s2056989022007812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 08/03/2022] [Indexed: 11/17/2022]
Abstract
The title compound was obtained via the reaction of (1E,2E)-3-(3-methoxyphenyl)-1-phenylprop-2-en-1-one with ethyl 2-oxopropanoate, using NH4I as a catalyst. In the molecule, the four rings are not in the same plane, the pyridine ring being inclined to the benzene rings by 17.26 (6), 56.16 (3) and 24.50 (6)°. In the crystal, molecules are linked by C—H⋯π interactions into a three-dimensional network. The title compound, C24H19NO, was obtained via the reaction of (1E,2E)-3-(3-methoxyphenyl)-1-phenylprop-2-en-1-one with ethyl 2-oxopropanoate, using NH4I as a catalyst. The compound crystallizes in the monoclinic space group I2/a. In the molecule, the four rings are not in the same plane, the pyridine ring being inclined to the benzene rings by 17.26 (6), 56.16 (3) and 24.50 (6)°. In the crystal, molecules are linked by C—H⋯π interactions into a three-dimensional network. To further analyse the intermolecular interactions, a Hirshfeld surface analysis was performed. Hirshfeld surface analysis indicates that the most abundant contributions to the crystal packing are from H⋯H (50.4%), C⋯H/H⋯C (37.9%) and O⋯H/H⋯O (5.1%) interactions.
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10
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Srilaxmi D, Reddy AG, Sireesha R, Rao PV, Kiran MR, Kolli D, Rao MVB. Design and Synthesis of Different Aryl Substituted 1,3,4-Oxadiazole-imidazo[1,5-a]pyridine Derivatives as Anticancer Agents. RUSS J GEN CHEM+ 2022. [DOI: 10.1134/s107036322205019x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Volpi G. Luminescent imidazo[1,5‐a] pyridine scaffold: synthetic heterocyclization strategies overview and promising applications. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200171] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Giorgio Volpi
- University of Turin: Universita degli Studi di Torino Chemistry ITALY
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12
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Colombo G, Attilio Ardizzoia G, Brenna S. Imidazo[1,5-a]pyridine-based derivatives as highly fluorescent dyes. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.120849] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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13
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Bori J, Manivannan V. A New Synthetic Route for Synthesis of
3‐Substituted
Imidazo[1,5‐
a
]pyridines. J Heterocycl Chem 2022. [DOI: 10.1002/jhet.4449] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jugal Bori
- Department of Chemistry Indian Institute of Technology Guwahati Guwahati Assam India
| | - Vadivelu Manivannan
- Department of Chemistry Indian Institute of Technology Guwahati Guwahati Assam India
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Zhu S, Chen X, Chen W, Ma Q, Li M, Fan W, Zhang J, Guo L. Multicomponent synthesis of novel β-carboline-fused imidazolium derivatives via the Mannich reaction: cytotoxicity, molecular docking, and mechanistic studies as angiogenesis inhibitors. NEW J CHEM 2022. [DOI: 10.1039/d1nj05471f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Herein we report novel multicomponent reactions for the synthesis of β-carboline-fused imidazolium derivatives via the Mannich-type reaction.
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Affiliation(s)
- Siyu Zhu
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of XinJiang Bingtuan, Shihezi University, Shihezi, China
| | - Xiaofei Chen
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of XinJiang Bingtuan, Shihezi University, Shihezi, China
| | - Wei Chen
- XinJiang Huashidan Pharmaceutical Research Co. Ltd., Urumqi, China
| | - Qin Ma
- XinJiang Huashidan Pharmaceutical Research Co. Ltd., Urumqi, China
| | - Meng Li
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of XinJiang Bingtuan, Shihezi University, Shihezi, China
| | - Wenxi Fan
- XinJiang Huashidan Pharmaceutical Research Co. Ltd., Urumqi, China
| | - Jie Zhang
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of XinJiang Bingtuan, Shihezi University, Shihezi, China
| | - Liang Guo
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of XinJiang Bingtuan, Shihezi University, Shihezi, China
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15
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Meng X, Cheng D, Wang S, Zhao X, Chen J. NH4I-Catalyzed Formal [4+2] Cycloaddition of α,β-Unsaturated O-Acetyl Oxime with Alkyl Pyruvate for Rapid Substituted Pyridine Formation. HETEROCYCLES 2022. [DOI: 10.3987/com-22-14688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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16
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Nirogi R, Mohammed AR, Shinde AK, Gagginapally SR, Kancharla DM, Ravella SR, Bogaraju N, Middekadi VR, Subramanian R, Palacharla RC, Benade V, Muddana N, Abraham R, Medapati RB, Thentu JB, Mekala VR, Petlu S, Lingavarapu BB, Yarra S, Kagita N, Goyal VK, Pandey SK, Jasti V. Discovery and Preclinical Characterization of Usmarapride (SUVN-D4010): A Potent, Selective 5-HT 4 Receptor Partial Agonist for the Treatment of Cognitive Deficits Associated with Alzheimer's Disease. J Med Chem 2021; 64:10641-10665. [PMID: 34251799 DOI: 10.1021/acs.jmedchem.1c00703] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of oxadiazole derivatives were synthesized and evaluated as 5-hydroxytryptamine-4 receptor (5-HT4R) partial agonists for the treatment of cognitive deficits associated with Alzheimer's disease. Starting from a reported 5-HT4R antagonist, a systematic structure-activity relationship was conducted, which led to the discovery of potent and selective 5-HT4R partial agonist 1-isopropyl-3-{5-[1-(3-methoxypropyl) piperidin-4-yl]-[1,3,4]oxadiazol-2-yl}-1H-indazole oxalate (Usmarapride, 12l). It showed balanced physicochemical-pharmacokinetic properties with robust nonclinical efficacy in cognition models. It also showed disease-modifying potential, as it increased neuroprotective soluble amyloid precursor protein alpha levels, and dose-dependent target engagement and correlation of efficacy with oral exposures. Phase 1 clinical studies have been completed and projected efficacious concentration was achieved without any major safety concerns. Phase 2 enabling long-term safety studies have been completed with no concerns for further development.
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Affiliation(s)
- Ramakrishna Nirogi
- Suven Life Sciences Limited, Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad 500 034, India
| | - Abdul Rasheed Mohammed
- Suven Life Sciences Limited, Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad 500 034, India
| | - Anil Karbhari Shinde
- Suven Life Sciences Limited, Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad 500 034, India
| | | | | | - Srinivasa Rao Ravella
- Suven Life Sciences Limited, Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad 500 034, India
| | - Narsimha Bogaraju
- Suven Life Sciences Limited, Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad 500 034, India
| | - Vanaja Reddy Middekadi
- Suven Life Sciences Limited, Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad 500 034, India
| | - Ramkumar Subramanian
- Suven Life Sciences Limited, Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad 500 034, India
| | | | - Vijay Benade
- Suven Life Sciences Limited, Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad 500 034, India
| | - Nageswararao Muddana
- Suven Life Sciences Limited, Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad 500 034, India
| | - Renny Abraham
- Suven Life Sciences Limited, Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad 500 034, India
| | - Rajesh Babu Medapati
- Suven Life Sciences Limited, Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad 500 034, India
| | - Jagadeesh Babu Thentu
- Suven Life Sciences Limited, Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad 500 034, India
| | - Venkat Reddy Mekala
- Suven Life Sciences Limited, Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad 500 034, India
| | - Surendra Petlu
- Suven Life Sciences Limited, Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad 500 034, India
| | - Bujji Babu Lingavarapu
- Suven Life Sciences Limited, Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad 500 034, India
| | - Sivasekhar Yarra
- Suven Life Sciences Limited, Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad 500 034, India
| | - Narendra Kagita
- Suven Life Sciences Limited, Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad 500 034, India
| | - Vinod Kumar Goyal
- Suven Life Sciences Limited, Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad 500 034, India
| | - Santosh Kumar Pandey
- Suven Life Sciences Limited, Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad 500 034, India
| | - Venkat Jasti
- Suven Life Sciences Limited, Serene Chambers, Road-5, Avenue-7, Banjara Hills, Hyderabad 500 034, India
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17
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Mennie KM, Reutershan MH, White C, Adams B, Becker B, Deng J, Katz JD, LaBlue E, Margrey K, Saurí J. Divergent and Regioselective Synthesis of Pyrazolo[1,5- a]pyridines and Imidazo[1,5- a]pyridines. Org Lett 2021; 23:4694-4698. [PMID: 34037404 DOI: 10.1021/acs.orglett.1c01431] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Nitrogenous heterocycles are ubiquitous in pharmaceuticals and drug-like compounds; however, regioselective synthesis has proved challenging. Herein we report our efforts to develop a regioselective method for the synthesis of pyrazolo[1,5-a]pyridines and the serendipitous discovery of a protocol for the regioselective formation of imidazo[1,5-a]pyridines. Together, these transformations allow for the rapid and selective formation of two important heterocyclic motifs from a common intermediate.
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Affiliation(s)
| | | | - Catherine White
- Merck & Co., Inc., Boston, Massachusetts 02115, United States
| | - Bruce Adams
- Merck & Co., Inc., Boston, Massachusetts 02115, United States
| | - Bridget Becker
- Merck & Co., Inc., Boston, Massachusetts 02115, United States
| | - James Deng
- Merck & Co., Inc., Boston, Massachusetts 02115, United States
| | - Jason D Katz
- Merck & Co., Inc., Boston, Massachusetts 02115, United States
| | | | - Kaila Margrey
- Merck & Co., Inc., Boston, Massachusetts 02115, United States
| | - Josep Saurí
- Merck & Co., Inc., Boston, Massachusetts 02115, United States
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18
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Understanding the Molecular Basis of 5-HT 4 Receptor Partial Agonists through 3D-QSAR Studies. Int J Mol Sci 2021; 22:ijms22073602. [PMID: 33808456 PMCID: PMC8036435 DOI: 10.3390/ijms22073602] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 03/23/2021] [Accepted: 03/26/2021] [Indexed: 12/15/2022] Open
Abstract
Alzheimer's disease (AD) is a neurodegenerative disorder whose prevalence has an incidence in senior citizens. Unfortunately, current pharmacotherapy only offers symptom relief for patients with side effects such as bradycardia, nausea, and vomiting. Therefore, there is a present need to provide other therapeutic alternatives for treatments for these disorders. The 5-HT4 receptor is an attractive therapeutic target since it has a potential role in central and peripheral nervous system disorders such as AD, irritable bowel syndrome, and gastroparesis. Quantitative structure-activity relationship analysis of a series of 62 active compounds in the 5-HT4 receptor was carried out in the present work. The structure-activity relationship was estimated using three-dimensional quantitative structure-activity relationship (3D-QSAR) techniques based on these structures' field molecular (force and Gaussian field). The best force-field QSAR models achieve a value for the coefficient of determination of the training set of R2training = 0.821, and for the test set R2test = 0.667, while for Gaussian-field QSAR the training and the test were R2training = 0.898 and R2test = 0.695, respectively. The obtained results were validated using a coefficient of correlation of the leave-one-out cross-validation of Q2LOO = 0.804 and Q2LOO = 0.886 for force- and Gaussian-field QSAR, respectively. Based on these results, novel 5-HT4 partial agonists with potential biological activity (pEC50 8.209-9.417 for force-field QSAR and 9.111-9.856 for Gaussian-field QSAR) were designed. In addition, for the new analogues, their absorption, distribution, metabolism, excretion, and toxicity properties were also analyzed. The results show that these new derivatives also have reasonable pharmacokinetics and drug-like properties. Our findings suggest novel routes for the design and development of new 5-HT4 partial agonists.
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19
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Volpi G, Rabezzana R. Imidazo[1,5- a]pyridine derivatives: useful, luminescent and versatile scaffolds for different applications. NEW J CHEM 2021. [DOI: 10.1039/d1nj00322d] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In the last few years, imidazo[1,5-a]pyridine nuclei and derivatives have attracted growing attention due to their unique chemical structure and versatility, optical behaviours, and biological properties.
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Affiliation(s)
- Giorgio Volpi
- Department of Chemistry
- University of Turin
- 7 - 10125 Turin
- Italy
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20
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Aksenov DA, Arutiunov NA, Maliuga VV, Aksenov AV, Rubin M. Synthesis of imidazo[1,5- a]pyridines via cyclocondensation of 2-(aminomethyl)pyridines with electrophilically activated nitroalkanes. Beilstein J Org Chem 2020; 16:2903-2910. [PMID: 33299488 PMCID: PMC7705866 DOI: 10.3762/bjoc.16.239] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 11/19/2020] [Indexed: 12/21/2022] Open
Abstract
Imidazo[1,5-a]pyridines were efficiently prepared via the cyclization of 2-picolylamines with nitroalkanes electrophilically activated in the presence of phosphorous acid in polyphosphoric acid (PPA) medium.
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Affiliation(s)
- Dmitrii A Aksenov
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin St., Stavropol 355017, Russian Federation
| | - Nikolai A Arutiunov
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin St., Stavropol 355017, Russian Federation
| | - Vladimir V Maliuga
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin St., Stavropol 355017, Russian Federation
| | - Alexander V Aksenov
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin St., Stavropol 355017, Russian Federation
| | - Michael Rubin
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin St., Stavropol 355017, Russian Federation
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, KS 66045, USA
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21
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Kulkarni MR, Lad NP, Patil SM, Gaikwad ND. Thionyl chloride‐mediated synthesis of 2‐azaindolizine sulfur‐bridged dimers by CH bond direct chalcogenation of imidazo[1,5‐
a
]pyridines. J CHIN CHEM SOC-TAIP 2020. [DOI: 10.1002/jccs.201900516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mahesh R. Kulkarni
- Department of Chemistry Organic Chemistry Research Centre, K.R.T. Arts, B.H. Commerce and A.M. Science College Nashik India
- Department of Medicinal Chemistry Piramal Enterprises Ltd. Mumbai India
| | - Nitin P. Lad
- Department of Chemistry Organic Chemistry Research Centre, K.R.T. Arts, B.H. Commerce and A.M. Science College Nashik India
- Department of Medicinal Chemistry Piramal Enterprises Ltd. Mumbai India
| | | | - Nitin D. Gaikwad
- Department of Chemistry Organic Chemistry Research Centre, K.R.T. Arts, B.H. Commerce and A.M. Science College Nashik India
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22
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Ramírez-Gómez A, Gutiérrez-Hernández AI, Alvarado-Castillo MA, Toscano RA, Ortega-Alfaro MC, López-Cortés JG. Selenoamides as powerful scaffold to build imidazo[1,5-a]pyridines using a grinding protocol. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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23
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Vanda D, Zajdel P, Soural M. Imidazopyridine-based selective and multifunctional ligands of biological targets associated with psychiatric and neurodegenerative diseases. Eur J Med Chem 2019; 181:111569. [DOI: 10.1016/j.ejmech.2019.111569] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 06/26/2019] [Accepted: 07/28/2019] [Indexed: 12/18/2022]
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24
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Herr JM, Rössiger C, Albrecht G, Yanagi H, Göttlich R. Solvent-free microwave-assisted synthesis of imidazo[1,5- a]pyridine and –quinoline derivatives. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1650188] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Jasmin Martha Herr
- Institute of Organic Chemistry, Justus-Liebig-University Giessen, Giessen, Germany
- Center for Materials Research (LaMa), Justus-Liebig-University Giessen, Giessen, Germany
| | - Carina Rössiger
- Institute of Organic Chemistry, Justus-Liebig-University Giessen, Giessen, Germany
- Center for Materials Research (LaMa), Justus-Liebig-University Giessen, Giessen, Germany
| | - Georg Albrecht
- Center for Materials Research (LaMa), Justus-Liebig-University Giessen, Giessen, Germany
- Institute of Applied Physics, Justus-Liebig-University Giessen, Giessen, Germany
| | - Hisao Yanagi
- Department of Materials Science, NAIST, Nara, Japan
| | - Richard Göttlich
- Institute of Organic Chemistry, Justus-Liebig-University Giessen, Giessen, Germany
- Center for Materials Research (LaMa), Justus-Liebig-University Giessen, Giessen, Germany
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25
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Kurhade S, Konstantinidou M, Sutanto F, Kurpiewska K, Kalinowska-Tłuścik J, Dömling A. Sequential Multicomponent Synthesis of 2-(Imidazo[1,5-α]pyridin-1-yl)-1,3,4-Oxadiazoles. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801880] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Santosh Kurhade
- Drug Design; University of Groningen; Address Deusinglaan 1 9713 AV Groningen The Netherlands
| | - Markella Konstantinidou
- Drug Design; University of Groningen; Address Deusinglaan 1 9713 AV Groningen The Netherlands
| | - Fandi Sutanto
- Drug Design; University of Groningen; Address Deusinglaan 1 9713 AV Groningen The Netherlands
| | - Katarzyna Kurpiewska
- Faculty of Chemistry; Jagiellonian University; Gronostajowa 2 30-387 Krakow Poland
| | | | - Alexander Dömling
- Drug Design; University of Groningen; Address Deusinglaan 1 9713 AV Groningen The Netherlands
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26
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Yagishita F, Kinouchi T, Hoshi K, Tezuka Y, Jibu Y, Karatsu T, Uemura N, Yoshida Y, Mino T, Sakamoto M, Kawamura Y. Highly efficient blue emission from boron complexes of 1-(o-hydroxyphenyl)imidazo[1,5-a]pyridine. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.05.048] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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27
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A study on the reaction of 3-alkyl(aryl)imidazo[1,5- a]pyridines with ninhydrin. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2018. [DOI: 10.1515/znb-2018-0039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Abstract
The reaction of 3-alkyl(aryl)imidazo[1,5-a]pyridines (1) with ninhydrin in dichloromethane at room temperature delivered good yields of the respective 2-hydroxy-2-(imidazo[1,5-a]pyridine-1-yl)indene-1,3-diones. In the presence of dimethyl acetylenedicarboxylate (DMAD), this uncatalyzed electrophilic substitution reaction, involving C-1 (in 1) and the central C=O (in ninhydrin), takes precedence over the three-component 1,4-dipolar cycloaddition reaction. This selectivity is probably due to the higher electrophilicity of the carbonyl carbon-2 in ninhydrin as compared to that of the sp-carbon atoms in DMAD, augmented with the high nucleophilicity of carbon-1 in 1.
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28
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Kurhade S, Diekstra E, Sutanto F, Kurpiewska K, Kalinowska-Tłuścik J, Dömling A. Multicomponent Reaction Based Synthesis of 1-Tetrazolylimidazo[1,5- a]pyridines. Org Lett 2018; 20:3871-3874. [PMID: 29943994 PMCID: PMC6038091 DOI: 10.1021/acs.orglett.8b01452] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
A series
of unprecedented tetrazole-linked imidazo[1,5-a]pyridines
are synthesized from simple and readily available
building blocks. The reaction sequence involves an azido-Ugi-deprotection
reaction followed by an acetic anhydride-mediated N-acylation–cyclization process to afford the target heterocycle.
Furthermore, the scope of the methodology was extended to diverse
R3-substitutions by employing commercial anhydrides, acid
chlorides, and acids as an acyl component. The scope for the postmodification
reactions are explored and the usefulness of the synthesis is exemplified
by an improved three-step synthesis of a guanylate cyclase stimulator.
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Affiliation(s)
- Santosh Kurhade
- Department of Drug Design , University of Groningen , A. Deusinglaan 1 , 9713 AV Groningen , The Netherlands
| | - Elmar Diekstra
- Department of Drug Design , University of Groningen , A. Deusinglaan 1 , 9713 AV Groningen , The Netherlands
| | - Fandi Sutanto
- Department of Drug Design , University of Groningen , A. Deusinglaan 1 , 9713 AV Groningen , The Netherlands
| | - Katarzyna Kurpiewska
- Jagiellonian University , Faculty of Chemistry , Gronostajowa 2 , 30-387 Krakow , Poland
| | | | - Alexander Dömling
- Department of Drug Design , University of Groningen , A. Deusinglaan 1 , 9713 AV Groningen , The Netherlands
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29
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Yagishita F, Nii C, Tezuka Y, Tabata A, Nagamune H, Uemura N, Yoshida Y, Mino T, Sakamoto M, Kawamura Y. Fluorescent N-Heteroarenes Having Large Stokes Shift and Water Solubility Suitable for Bioimaging. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800250] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Fumitoshi Yagishita
- Department of Applied Chemistry; Graduate School of Science and Technology; Tokushima University; Tokushima 770-8506 Japan
| | - Chiho Nii
- Department of Applied Chemistry; Graduate School of Science and Technology; Tokushima University; Tokushima 770-8506 Japan
| | - Yoshihiko Tezuka
- Department of Optical Science and Technology; Graduate School of Science and Technology; Tokushima University; Tokushima 770-8506 Japan
| | - Atsushi Tabata
- Faculty of Bioscience and Bioindustry; Tokushima University; Tokushima 770-8506 Japan
| | - Hideaki Nagamune
- Faculty of Bioscience and Bioindustry; Tokushima University; Tokushima 770-8506 Japan
| | - Naohiro Uemura
- Graduate School of Engineering; Chiba University; Chiba 263-8522 Japan
| | - Yasushi Yoshida
- Graduate School of Engineering; Chiba University; Chiba 263-8522 Japan
| | - Takashi Mino
- Graduate School of Engineering; Chiba University; Chiba 263-8522 Japan
| | - Masami Sakamoto
- Graduate School of Engineering; Chiba University; Chiba 263-8522 Japan
| | - Yasuhiko Kawamura
- Department of Applied Chemistry; Graduate School of Science and Technology; Tokushima University; Tokushima 770-8506 Japan
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30
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Nirogi R, Mohammed AR, Shinde AK, Gagginapally SR, Kancharla DM, Middekadi VR, Bogaraju N, Ravella SR, Singh P, Birangal SR, Subramanian R, Palacharla RC, Benade V, Muddana N, Jayarajan P. Synthesis, Structure-Activity Relationships, and Preclinical Evaluation of Heteroaromatic Amides and 1,3,4-Oxadiazole Derivatives as 5-HT 4 Receptor Partial Agonists. J Med Chem 2018; 61:4993-5008. [PMID: 29763304 DOI: 10.1021/acs.jmedchem.8b00457] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Alzheimer's disease (AD) is a neurodegenerative disorder that has a higher prevalence and incidence in people older than 60 years. The need for improved AD therapies is unmet as the current therapies are symptomatic with modest efficacy. Partial agonists of the 5-HT4 receptor (5-HT4R) offer both symptomatic and disease-modifying treatments as they shift amyloid-precursor-protein (APP) processing from the amyloidogenic pathway to the nonamyloidogenic pathway by activating the α-secretase enzyme. In addition, they also offer symptomatic treatment by increasing levels of the neurotransmitter acetylcholine in the brain. Because of this fascinating dual mechanism of action, several chemical scaffolds having 5-HT4R pharmacophores were designed and evaluated. Most of the synthesized compounds showed potent in vitro affinities and in vivo efficacies. Upon analysis of focused structure-activity relationships, compound 4o was identified as a potent 5-HT4R partial agonist with favorable ADME properties and good in vivo efficacy. GR-125487, a selective 5-HT4R antagonist, attenuated the activity of compound 4o in the novel-object-recognition-test cognition model.
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Affiliation(s)
- Ramakrishna Nirogi
- Discovery Research , Suven Life Sciences Limited , Serene Chambers, Road-5, Avenue-7, Banjara Hills , Hyderabad 500 034 , India
| | - Abdul Rasheed Mohammed
- Discovery Research , Suven Life Sciences Limited , Serene Chambers, Road-5, Avenue-7, Banjara Hills , Hyderabad 500 034 , India
| | - Anil K Shinde
- Discovery Research , Suven Life Sciences Limited , Serene Chambers, Road-5, Avenue-7, Banjara Hills , Hyderabad 500 034 , India
| | - Shankar Reddy Gagginapally
- Discovery Research , Suven Life Sciences Limited , Serene Chambers, Road-5, Avenue-7, Banjara Hills , Hyderabad 500 034 , India
| | - Durga Malleshwari Kancharla
- Discovery Research , Suven Life Sciences Limited , Serene Chambers, Road-5, Avenue-7, Banjara Hills , Hyderabad 500 034 , India
| | - Vanaja Reddy Middekadi
- Discovery Research , Suven Life Sciences Limited , Serene Chambers, Road-5, Avenue-7, Banjara Hills , Hyderabad 500 034 , India
| | - Narsimha Bogaraju
- Discovery Research , Suven Life Sciences Limited , Serene Chambers, Road-5, Avenue-7, Banjara Hills , Hyderabad 500 034 , India
| | - Srinivasa Rao Ravella
- Discovery Research , Suven Life Sciences Limited , Serene Chambers, Road-5, Avenue-7, Banjara Hills , Hyderabad 500 034 , India
| | - Pooja Singh
- Discovery Research , Suven Life Sciences Limited , Serene Chambers, Road-5, Avenue-7, Banjara Hills , Hyderabad 500 034 , India
| | - Sumit Raosaheb Birangal
- Discovery Research , Suven Life Sciences Limited , Serene Chambers, Road-5, Avenue-7, Banjara Hills , Hyderabad 500 034 , India
| | - Ramkumar Subramanian
- Discovery Research , Suven Life Sciences Limited , Serene Chambers, Road-5, Avenue-7, Banjara Hills , Hyderabad 500 034 , India
| | - Raghava Choudary Palacharla
- Discovery Research , Suven Life Sciences Limited , Serene Chambers, Road-5, Avenue-7, Banjara Hills , Hyderabad 500 034 , India
| | - Vijay Benade
- Discovery Research , Suven Life Sciences Limited , Serene Chambers, Road-5, Avenue-7, Banjara Hills , Hyderabad 500 034 , India
| | - Nageswararao Muddana
- Discovery Research , Suven Life Sciences Limited , Serene Chambers, Road-5, Avenue-7, Banjara Hills , Hyderabad 500 034 , India
| | - Pradeep Jayarajan
- Discovery Research , Suven Life Sciences Limited , Serene Chambers, Road-5, Avenue-7, Banjara Hills , Hyderabad 500 034 , India
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31
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Hu Z, Hou J, Liu J, Yu W, Chang J. Synthesis of imidazo[1,5-a]pyridines via I2-mediated sp3 C–H amination. Org Biomol Chem 2018; 16:5653-5660. [DOI: 10.1039/c8ob01501e] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A transition-metal-free sp3 C–H amination reaction has been developed employing molecular iodine for imidazo[1,5-a]pyridine synthesis.
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Affiliation(s)
- Zhiyuan Hu
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- China
| | - Jiao Hou
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- China
| | - Jie Liu
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- China
| | - Wenquan Yu
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- China
| | - Junbiao Chang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- China
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32
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Volpi G, Magistris C, Garino C. Natural aldehyde extraction and direct preparation of new blue light-emitting imidazo[1,5-a]pyridine fluorophores. Nat Prod Res 2017; 32:2304-2311. [PMID: 29224381 DOI: 10.1080/14786419.2017.1410803] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
This work describes the extraction of natural aldehydes and the use of extracts to synthesise new fluorescent imidazo[1,5-a]pyridine derivatives. The characterisation of the extracted aldehydes by different techniques and the optical study of the fluorescent products allow the design of new compounds suitable for pharmaceutical, down-shifting, microscopy and electronic applications. The fluorophores are generated by an easy one-pot cyclisation reaction in mild conditions without catalyst and with only water as by-product.
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Affiliation(s)
- Giorgio Volpi
- a Department of Chemistry , University of Turin , Torino , Italy
| | | | - Claudio Garino
- a Department of Chemistry , University of Turin , Torino , Italy
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33
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Yagishita F, Kozai N, Nii C, Tezuka Y, Uemura N, Yoshida Y, Mino T, Sakamoto M, Kawamura Y. Synthesis of Dimeric Imidazo[1, 5-a
]pyridines and Their Photophysical Properties. ChemistrySelect 2017. [DOI: 10.1002/slct.201702277] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Fumitoshi Yagishita
- Department of Applied Chemistry; Graduate School of Science and Technology; Tokushima University; Tokushima 770-8506 Japan
| | - Natsumi Kozai
- Department of Applied Chemistry; Graduate School of Science and Technology; Tokushima University; Tokushima 770-8506 Japan
| | - Chiho Nii
- Department of Applied Chemistry; Graduate School of Science and Technology; Tokushima University; Tokushima 770-8506 Japan
| | - Yoshihiko Tezuka
- Department of Optical Science and Technology; Graduate School of Science and Technology; Tokushima University; Tokushima 770-8506 Japan
| | - Naohiro Uemura
- Graduate School of Engineering; Chiba University; Chiba 263-8522 Japan
| | - Yasushi Yoshida
- Graduate School of Engineering; Chiba University; Chiba 263-8522 Japan
| | - Takashi Mino
- Graduate School of Engineering; Chiba University; Chiba 263-8522 Japan
| | - Masami Sakamoto
- Graduate School of Engineering; Chiba University; Chiba 263-8522 Japan
| | - Yasuhiko Kawamura
- Department of Applied Chemistry; Graduate School of Science and Technology; Tokushima University; Tokushima 770-8506 Japan
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34
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Wang T, Yang Z, Zhou N, Sun L, Lv Z, Wu C. Identification and functional characterisation of 5-HT4 receptor in sea cucumber Apostichopus japonicus (Selenka). Sci Rep 2017; 7:40247. [PMID: 28059140 PMCID: PMC5216381 DOI: 10.1038/srep40247] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Accepted: 12/05/2016] [Indexed: 02/07/2023] Open
Abstract
Serotonin (5-HT) is an important neurotransmitter and neuromodulator that controls a variety of sensory and motor functions through 5-HT receptors (5-HTRs). The 5-HT4R subfamily is linked to Gs proteins, which activate adenylyl cyclases (ACs), and is involved in many responses in peripheral organs. In this study, the 5-HT4R from Apostichopus japonicus (Aj5-HT4R) was identified and characterised. The cloned full-length Aj5-HT4R cDNA is 1,544 bp long and contains an open reading frame 1,011 bp in length encoding 336 amino acid proteins. Bioinformatics analysis of the Aj5-HT4R protein indicated this receptor was a member of class A G protein coupled receptor (GPCR) family. Further experiments using Aj5-HT4R-transfected HEK293 cells demonstrated that treatment with 5-HT triggered a significant increase in intracellular cAMP level in a dose-dependent manner and induced a rapid internalisation of Aj5-HT4R fused with enhanced green fluorescent protein (Aj5-HT4R-EGFP) from the cell surface into the cytoplasm. In addition, the transcriptional profiles of Aj5-HT4R in aestivating A. japonicas and phosphofructokinase (AjPFK) in 5-HT administrated A. japonicus have been analysed by real-time PCR assays. Results have led to a basic understanding of Aj5-HT4R in A. japonicus, and provide a foundation for further exploration of the cell signaling and regulatory functions of this receptor.
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Affiliation(s)
- Tianming Wang
- National Engineering Research Center of Marine Facilities Aquaculture, Marine Science College, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, People's Republic of China
| | - Zhen Yang
- National Engineering Research Center of Marine Facilities Aquaculture, Marine Science College, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, People's Republic of China
| | - Naiming Zhou
- Institute of Biochemistry, College of LifeSciences, Zijingang Campus, Zhejiang University, Hangzhou, Zhejiang 310058, People's Republic of China
| | - Lina Sun
- Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, Shandong 266071, People's Republic of China
| | - Zhenming Lv
- National Engineering Research Center of Marine Facilities Aquaculture, Marine Science College, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, People's Republic of China
| | - Changwen Wu
- National Engineering Research Center of Marine Facilities Aquaculture, Marine Science College, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, People's Republic of China
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35
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Yagishita F, Nomura K, Shiono S, Nii C, Mino T, Sakamoto M, Kawamura Y. Palladium-catalyzed Mizoroki-Heck Reaction Using Imidazo[1,5-a]pyridines. ChemistrySelect 2016. [DOI: 10.1002/slct.201601185] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Fumitoshi Yagishita
- Department of Applied Chemistry, Graduate School of Science and Technology; Tokushima University; Tokushima 770-8506 Japan
| | - Koh Nomura
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering; Chiba University; Chiba 263-8522 Japan
| | - Saki Shiono
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering; Chiba University; Chiba 263-8522 Japan
| | - Chiho Nii
- Department of Applied Chemistry, Graduate School of Science and Technology; Tokushima University; Tokushima 770-8506 Japan
| | - Takashi Mino
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering; Chiba University; Chiba 263-8522 Japan
| | - Masami Sakamoto
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering; Chiba University; Chiba 263-8522 Japan
| | - Yasuhiko Kawamura
- Department of Applied Chemistry, Graduate School of Science and Technology; Tokushima University; Tokushima 770-8506 Japan
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Hagena H, Manahan-Vaughan D. The serotonergic 5-HT4 receptor: A unique modulator of hippocampal synaptic information processing and cognition. Neurobiol Learn Mem 2016; 138:145-153. [PMID: 27317942 DOI: 10.1016/j.nlm.2016.06.014] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 06/06/2016] [Accepted: 06/14/2016] [Indexed: 01/10/2023]
Abstract
Serotonin (5-hydroxytryptamine, 5-HT) contributes in multifarious ways to the regulation of brain function, spanning key aspects such as the sleep-wake cycle, appetite, mood and mental health. The 5-HT receptors comprise seven receptor families (5-HT1-7) that are further subdivided into 14 receptor subtypes. The role of the 5-HT receptor in the modulation of neuronal excitability has been well documented. Recently, however, it has become apparent that the 5-HT4 receptor may contribute significantly to cognition and regulates less ostensible aspects of brain function: it engages in metaplastic regulation of synaptic responsiveness in key brain structures such as the hippocampus, thereby specifically promoting persistent forms of synaptic plasticity, and influences the direction of change in synaptic strength in selected hippocampal subfields. This highly specific neuromodulatory control by the 5-HT4 receptor may in turn explain the reported role for this receptor in hippocampus-dependent cognition. In this review article, we describe the role of the 5-HT4 receptor in hippocampal function, and describe how this receptor plays a unique and highly specialised role in synaptic information storage and cognition.
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Affiliation(s)
- Hardy Hagena
- Department of Neurophysiology, Medical Faculty, Ruhr University Bochum, Germany
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