1
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Padder AH, Bhat MY, Prakash Rao HS, Gupta R, Ahmed QN. Microwave‐Assisted PEG‐400 Medaited Synthesis of 4,5‐dihydro‐1
H
‐benzo[
g
]indazole Derivatives: An Enaminone Approach. ChemistrySelect 2023. [DOI: 10.1002/slct.202204951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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2
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Chen Y, Li H, Yen R, Heckrodt TJ, McMurtrie D, Singh R, Taylor V, Masuda ES, Park G, Payan DG. Optimization of Pyrimidine Compounds as Potent JAK1 Inhibitors and the Discovery of R507 as a Clinical Candidate. ACS Med Chem Lett 2022; 13:1805-1811. [PMID: 36385926 PMCID: PMC9661703 DOI: 10.1021/acsmedchemlett.2c00411] [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: 09/02/2022] [Accepted: 10/21/2022] [Indexed: 11/30/2022] Open
Abstract
Janus kinases (JAK) play a critical role in JAK/signal transducer and activator of transcription (STAT) signaling pathways that mediate immune response and cell growth. From high-throughput screening (HTS) hit to lead optimization, a series of pyrimidine compounds has been discovered as potent JAK1 inhibitors with selectivity over JAK2. Cell-based assays were used as primary screening methods for evaluating potency and selectivity, the results were further assessed and confirmed by biochemical and additional cellular assays for lead molecules. Also discussed is the unique correlation between a trifluomethyl group and CYP3A4 inhibition in the presence of NADPH, the activity of which was successfully decreased with the reduction of fluoro-atoms, increasing IC50 from 0.5 μM to >10 μM. The development of novel and scalable synthetic routes for amino-phenyl intermediates was essential for the discovery of late-stage lead molecules, including clinical candidate R507 (33). In preclinical studies, 33 exhibited great efficacy in mouse studies by inhibiting IFNγ expression induced by IL-2 and in a rat collagen-induced arthritis disease model.
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Affiliation(s)
- Yan Chen
- Rigel Pharmaceuticals Inc., South San Francisco, California 94080, United States
| | - Hui Li
- Rigel Pharmaceuticals Inc., South San Francisco, California 94080, United States
| | - Rose Yen
- Rigel Pharmaceuticals Inc., South San Francisco, California 94080, United States
| | - Thilo J. Heckrodt
- Rigel Pharmaceuticals Inc., South San Francisco, California 94080, United States
| | - Darren McMurtrie
- Rigel Pharmaceuticals Inc., South San Francisco, California 94080, United States
| | - Rajinder Singh
- Rigel Pharmaceuticals Inc., South San Francisco, California 94080, United States
| | - Vanessa Taylor
- Rigel Pharmaceuticals Inc., South San Francisco, California 94080, United States
| | - Esteban S. Masuda
- Rigel Pharmaceuticals Inc., South San Francisco, California 94080, United States
| | - Gary Park
- Rigel Pharmaceuticals Inc., South San Francisco, California 94080, United States
| | - Donald G. Payan
- Rigel Pharmaceuticals Inc., South San Francisco, California 94080, United States
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3
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Ueda M, Yasui M, Hasegawa M, Konishi K, Takeda N. Dihalogenative Cyclization for the Synthesis of 4-Bromo-1-bromoalkyl-5-aryl/alkyl/alkenyl-pyrazoles. HETEROCYCLES 2021. [DOI: 10.3987/com-20-s(k)43] [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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4
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Chauhan PS, Brettell S, Ramakotaiah M, Diarra S, Nguyen AMT, Wei X, Hamdane Y, Yongo-Luwawa CD, Lubell WD. Hydrazine derivative synthesis by trifluoroacetyl hydrazide alkylation. CAN J CHEM 2020. [DOI: 10.1139/cjc-2020-0052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
N′-Alkyl hydrazides were effectively synthesized by routes featuring installation, alkylation, and removal of a trifluoroacetyl group. A set of amino acid derived hydrazides were acylated using trifluoroacetic anhydride, and the resulting trifluoroacetyl hydrazides were alkylated with alcohols in Mitsunobu reactions and with alkyl halides under alkaline conditions. Removal of the trifluoroacetyl group was affected under reductive and hydrolytic conditions to provide the respective N′-alkyl hydrazides. This three-step process may be performed without isolation of intermediates to yield N′-alkyl hydrazide after a single chromatographic purification.
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Affiliation(s)
- Pradeep S. Chauhan
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Skye Brettell
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Mulamreddy Ramakotaiah
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Sitan Diarra
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Anh Minh Thao Nguyen
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Xiaozheng Wei
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Yousra Hamdane
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Charity Deborah Yongo-Luwawa
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - William D. Lubell
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
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5
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Smith D, Krishnananthan S, Meanwell NA, Mathur A, Li J. Multigram Synthesis of BMS-929075, an Allosteric, Palm Site Inhibitor of HCV NS5B Replicase, Involving the Synthesis of a Highly Functionalized Benzofuran through a Telescoped Process. Org Process Res Dev 2020. [DOI: 10.1021/acs.oprd.0c00198] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daniel Smith
- Small Molecule Drug Discovery, Bristol Myers Squibb Research and Early Development, P.O. Box 4000, Princeton, New Jersey 08543-4000, United States
| | - Subramaniam Krishnananthan
- Small Molecule Drug Discovery, Bristol Myers Squibb Research and Early Development, P.O. Box 4000, Princeton, New Jersey 08543-4000, United States
| | - Nicholas A. Meanwell
- Small Molecule Drug Discovery, Bristol Myers Squibb Research and Early Development, P.O. Box 4000, Princeton, New Jersey 08543-4000, United States
| | - Arvind Mathur
- Small Molecule Drug Discovery, Bristol Myers Squibb Research and Early Development, P.O. Box 4000, Princeton, New Jersey 08543-4000, United States
| | - Jianqing Li
- Small Molecule Drug Discovery, Bristol Myers Squibb Research and Early Development, 100 Binney Street, Cambridge, Massachusetts 02142, United States
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6
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Ikawa T, Masuda S, Akai S. One‐Pot Generation of Benzynes from Phenols: Formation of Primary Anilines by the Deoxyamination of Phenols. Chemistry 2020; 26:4320-4332. [DOI: 10.1002/chem.201904987] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Indexed: 12/19/2022]
Affiliation(s)
- Takashi Ikawa
- Graduate School of Pharmaceutical Sciences Osaka University Yamadaoka 1–6 Suita Osaka 565-0871 Japan
| | - Shigeaki Masuda
- Graduate School of Pharmaceutical Sciences Osaka University Yamadaoka 1–6 Suita Osaka 565-0871 Japan
| | - Shuji Akai
- Graduate School of Pharmaceutical Sciences Osaka University Yamadaoka 1–6 Suita Osaka 565-0871 Japan
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7
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Liu C, Chen Z, Yan H, Xi S, Yam KM, Gao J, Du Y, Li J, Zhao X, Xie K, Xu H, Li X, Leng K, Pennycook SJ, Liu B, Zhang C, Koh MJ, Loh KP. Expedient synthesis of E-hydrazone esters and 1 H-indazole scaffolds through heterogeneous single-atom platinum catalysis. SCIENCE ADVANCES 2019; 5:eaay1537. [PMID: 31840074 PMCID: PMC6897547 DOI: 10.1126/sciadv.aay1537] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Accepted: 10/21/2019] [Indexed: 05/24/2023]
Abstract
Unprotected E-hydrazone esters are prized building blocks for the preparation of 1H-indazoles and countless other N-containing biologically active molecules. Despite previous advances, efficient and stereoselective synthesis of these compounds remains nontrivial. Here, we show that Pt single atoms anchored on defect-rich CeO2 nanorods (Pt1/CeO2), in conjunction with the alcoholysis of ammonia borane, promotes exceptionally E-selective hydrogenation of α-diazoesters to afford a wide assortment of N-H hydrazone esters with an overall turnover frequency of up to 566 hours-1 upon reaction completion. The α-diazoester substrates could be generated in situ from readily available carboxylic esters in one-pot hydrogenation reaction. Utility is demonstrated through concise, scalable synthesis of 1H-indazole-derived pharmaceuticals and their 15N-labeled analogs. The present protocol highlights a key mechanistic nuance wherein simultaneous coordination of a Pt site with the diazo N═N and ester carbonyl motifs plays a central role in controlling stereoselectivity, which is supported by density functional theory calculations.
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Affiliation(s)
- Cuibo Liu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Zhongxin Chen
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Huan Yan
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Shibo Xi
- Institute of Chemical and Engineering Sciences, Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, Singapore 627833, Singapore
| | - Kah Meng Yam
- Department of Physics, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Jiajian Gao
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Yonghua Du
- Institute of Chemical and Engineering Sciences, Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, Singapore 627833, Singapore
| | - Jing Li
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Xiaoxu Zhao
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117575, Singapore
| | - Keyu Xie
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, Northwestern Polytechnical University, Xi’an 710072, China
| | - Haisen Xu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Xing Li
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Kai Leng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Stephen J. Pennycook
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117575, Singapore
| | - Bin Liu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Chun Zhang
- Department of Physics, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Ming Joo Koh
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Kian Ping Loh
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
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8
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Heckrodt TJ, Chen Y, Singh R. Synthesis of the isotopically labeled JAK1/3 inhibitor [D]-R545 and its oxidative metabolite [D]-R935: Protecting group-directed regioselective bromination to access 3,4,5-substituted anilines. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.02.059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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9
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Janardhanan JC, Mishra RK, Das G, Sini S, Jayamurthy P, Suresh CH, Praveen VK, Manoj N, Babu BP. Functionalizable 1H
-Indazoles by Palladium Catalyzed Aza-Nenitzescu Reaction: Pharmacophores to Donor-Acceptor Type Multi-Luminescent Fluorophores. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800413] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Jith C. Janardhanan
- Department of Applied Chemistry; Cochin University of Science and Technology (CUSAT); Cochin 682022 India
| | - Rakesh K. Mishra
- Chemical Science and Technology Division; CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST); Thiruvanathapuram 695019 India
- Department of Sciences and Humanities; National Institute of Technology, Uttarakhand (NITUK); Srinagar (Garhwal) 246174 India
| | - Gourab Das
- Chemical Science and Technology Division; CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST); Thiruvanathapuram 695019 India
- Academy of Scientific and Innovative Research (AcSIR); CSIR-NIIST Campus; Thiruvanathapuram 695019 India
| | - Suresh Sini
- Agroprocessing and Technology Division; CSIR-NIIST; Thiruvanathapuram 695019 India
| | - Purushothaman Jayamurthy
- Academy of Scientific and Innovative Research (AcSIR); CSIR-NIIST Campus; Thiruvanathapuram 695019 India
- Agroprocessing and Technology Division; CSIR-NIIST; Thiruvanathapuram 695019 India
| | - Cherumuttathu H. Suresh
- Chemical Science and Technology Division; CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST); Thiruvanathapuram 695019 India
- Academy of Scientific and Innovative Research (AcSIR); CSIR-NIIST Campus; Thiruvanathapuram 695019 India
| | - Vakayil K. Praveen
- Chemical Science and Technology Division; CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST); Thiruvanathapuram 695019 India
- Academy of Scientific and Innovative Research (AcSIR); CSIR-NIIST Campus; Thiruvanathapuram 695019 India
| | - Narayanapillai Manoj
- Department of Applied Chemistry; Cochin University of Science and Technology (CUSAT); Cochin 682022 India
| | - Beneesh P. Babu
- Department of Chemistry; National Institute of Technology, Karnataka (NITK); Surathkal 575025 India
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10
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Ning Y, Kawahata M, Yamaguchi K, Otani Y, Ohwada T. Synthesis, structure and N-N bonding character of 1,1-disubstituted indazolium hexafluorophosphate. Chem Commun (Camb) 2018; 54:1881-1884. [PMID: 29392251 DOI: 10.1039/c8cc00183a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
1,1-Disubstituted indazolium hexafluorophosphates were synthesized via intramolecular electrophilic amination reactions under mild conditions. The crystal structures were determined and are consistent with the presence of a stable N-N bond, which can be cleaved by hydrogenation. Both experimental and computational studies suggest a covalent bonding character of the N-N bond, with diminished aromaticity of the newly formed pyrazolium ring due to the quaternary ammonium atom (N1), in contrast to the aromatic character of the parent indazole.
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Affiliation(s)
- Yingtang Ning
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
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11
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Jayanthi M, Rajakumar P. Synthesis, Cell Viability, and Flow Cytometric Fluorescence Pulse Width Analysis of Dendrimers with Indazoles Surface Unit. J Heterocycl Chem 2017. [DOI: 10.1002/jhet.2913] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mani Jayanthi
- Department of Organic Chemistry; University of Madras; Guindy Chennai 600 025 India
| | - Perumal Rajakumar
- Department of Organic Chemistry; University of Madras; Guindy Chennai 600 025 India
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12
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Akram Khan M, Afzal M. Chemical composition of Nigella sativa Linn: Part 2 Recent advances. Inflammopharmacology 2016; 24:67-79. [PMID: 27068721 PMCID: PMC4883276 DOI: 10.1007/s10787-016-0262-7] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 03/15/2016] [Indexed: 01/15/2023]
Abstract
The black cumin or Nigella sativa L. seeds have many acclaimed medicinal properties such as bronchodilatory, hypotensive, antibacterial, antifungal, analgesic, anti-inflammatory and immunopotentiating. This review article is an update on the previous article published on Nigella sativa L. in this journal in 1999. It covers the medicinal properties and chemical syntheses of the alkaloids isolated from the seeds of the herb.
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Affiliation(s)
- M Akram Khan
- Biomolecular Science Centre, Sheffield Hallam University, Howard Street, Sheffield, S1 1WB, UK.
| | - M Afzal
- Department of Biological Sciences, Faculty of Science, Kuwait University, Kuwait City, Kuwait
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13
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Cyr P, Régnier S, Bechara WS, Charette AB. Rapid Access to 3-Aminoindazoles from Tertiary Amides. Org Lett 2015; 17:3386-9. [DOI: 10.1021/acs.orglett.5b00765] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Patrick Cyr
- Centre in Green Chemistry and Catalysis, Department of Chemistry,
Faculty of Arts and Science, Université de Montréal, Station Downtown, Québec H3C 3J7, Canada
| | - Sophie Régnier
- Centre in Green Chemistry and Catalysis, Department of Chemistry,
Faculty of Arts and Science, Université de Montréal, Station Downtown, Québec H3C 3J7, Canada
| | - William S. Bechara
- Centre in Green Chemistry and Catalysis, Department of Chemistry,
Faculty of Arts and Science, Université de Montréal, Station Downtown, Québec H3C 3J7, Canada
| | - André B. Charette
- Centre in Green Chemistry and Catalysis, Department of Chemistry,
Faculty of Arts and Science, Université de Montréal, Station Downtown, Québec H3C 3J7, Canada
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14
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Liu YC, Zhang R, Wu QY, Chen Q, Yang GF. Recent Developments in the Synthesis and Applications of Isatins. ORG PREP PROCED INT 2014. [DOI: 10.1080/00304948.2014.922378] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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15
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Ye M, Edmunds AJF, Morris JA, Sale D, Zhang Y, Yu JQ. A Robust Protocol for Pd(II)-catalyzed C-3 Arylation of ( 1H) Indazoles and Pyrazoles: Total Synthesis of Nigellidine Hydrobromide. Chem Sci 2013; 4:2374-2379. [PMID: 23691269 DOI: 10.1039/c3sc50184a] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
C3-arylated indazole and pyrazoles are privileged structural motifs in agrochemicals and pharmaceuticals. C-3 C-H arylation of (1H) indazole and pyrazole has been a significant challenge due to the poor reactivity of the C-3 position. Herein, we report a practical Pd(II)/Phen catalyst and conditions for direct C-3 arylation of indazole and pyrazole with ArI or ArBr without using Ag additives as halide scavengers. The use of toluene, chlorobenzene, trifluoromethylbenzene and mesitylene as the solvent was found to be crucial for the selectivity and reactivity. We further demonstrate the robustness of this protocol through the first total synthesis of Nigellidine hydrobromide as well as expedient preparation of heterocycles structurally related to pesticides and drug molecules.
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Affiliation(s)
- Mengchun Ye
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, CA, 92037, USA
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16
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Laulhé S, Gori SS, Nantz MH. A Chemoselective, One-Pot Transformation of Aldehydes to Nitriles. J Org Chem 2012; 77:9334-7. [DOI: 10.1021/jo301133y] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Sébastien Laulhé
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Sadakatali S. Gori
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Michael H. Nantz
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
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17
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Büchel GE, Stepanenko IN, Hejl M, Jakupec MA, Keppler BK, Heffeter P, Berger W, Arion VB. Osmium(IV) complexes with 1H- and 2H-indazoles: tautomer identity versus spectroscopic properties and antiproliferative activity. J Inorg Biochem 2012; 113:47-54. [PMID: 22687494 PMCID: PMC3400055 DOI: 10.1016/j.jinorgbio.2012.04.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 04/02/2012] [Accepted: 04/02/2012] [Indexed: 11/29/2022]
Abstract
A one-pot synthesis of osmium(IV) complexes with two different tautomers of indazole, 1H-indazole and 2H-indazole, namely (H2ind)[OsIVCl5(2H-ind)] (1) and (H2ind)[OsIVCl5(1H-ind)] (2) is reported. Both compounds have been comprehensively characterized by NMR spectroscopy, ESI (electrospray ionization) mass spectrometry, electronic absorption spectroscopy, IR spectroscopy, cyclic voltammetry and tested for antiproliferative activity in vitro in three human cancer cell lines, CH1 (ovarian carcinoma), A549 (non-small cell lung cancer) and SW480 (colon carcinoma), as well as in vivo in a Hep3B SCID mouse xeno-transplantation model. 2H-Indazole tautomer stabilization in 1 has been confirmed by X-ray diffraction.
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Affiliation(s)
- Gabriel E Büchel
- University of Vienna, Institute of Inorganic Chemistry, Währinger Strasse 42, A-1090 Vienna, Austria
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18
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Sather AC, Berryman OB, Rebek J. Synthesis of fused indazole ring systems and application to nigeglanine hydrobromide. Org Lett 2012; 14:1600-3. [PMID: 22385299 PMCID: PMC3324311 DOI: 10.1021/ol300303s] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The single-step synthesis of fused tricyclic pyridazino[1,2-a]indazolium ring systems is described. Structural details revealed by crystallography explain the unexpected reactivity. The method is applied to the gram scale synthesis of nigeglanine hydrobromide.
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Affiliation(s)
- Aaron C. Sather
- The Scripps Research Institute Mail MB-26, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Orion B. Berryman
- The Scripps Research Institute Mail MB-26, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Julius Rebek
- The Scripps Research Institute Mail MB-26, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
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19
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20
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Cankařová N, Hlaváč J, Krchňák V. Recent Synthetic Approaches to 1H- and 2H-Indazoles. A Review. ORG PREP PROCED INT 2010. [DOI: 10.1080/00304948.2010.513898] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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21
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Kitson SL, Jones S, Watters W, Chan F, Madge D. Carbon-14 radiosynthesis of 4-(5-chloro-2-hydroxyphenyl)-3-(2-hydroxyethyl)-6-(trifluoromethyl)-[4-14C]quinolin-2(1H)-one (XEN-D0401), A novel BK channel activator. J Labelled Comp Radiopharm 2010. [DOI: 10.1002/jlcr.1740] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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22
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Silva VLM, Silva AMS, Pinto DCGA, Elguero J, Cavaleiro JAS. Synthesis of New 1H-Indazoles through Diels-Alder Transformations of 4-Styrylpyrazoles under Microwave Irradiation Conditions. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900513] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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23
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Affiliation(s)
- Andreas Schmidt
- Clausthal University of Technology, Institute of Organic Chemistry, Leibnizstrasse 6, 38678 Clausthal‐Zellerfeld, Germany, Fax: +49‐5323‐722858
| | - Ariane Beutler
- Clausthal University of Technology, Institute of Organic Chemistry, Leibnizstrasse 6, 38678 Clausthal‐Zellerfeld, Germany, Fax: +49‐5323‐722858
| | - Bohdan Snovydovych
- Clausthal University of Technology, Institute of Organic Chemistry, Leibnizstrasse 6, 38678 Clausthal‐Zellerfeld, Germany, Fax: +49‐5323‐722858
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Inamoto K. [Novel access to indazoles based on palladium-catalyzed amination chemistry]. YAKUGAKU ZASSHI 2008; 128:997-1005. [PMID: 18591867 DOI: 10.1248/yakushi.128.997] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Two efficient methods to construct the indazole nucleus have been developed, both of which utilize palladium-catalyzed intramolecular carbon-nitrogen bond formation. One is based on intramolecular Buchwald-Hartwig amination reaction of 2-halobenzophenone tosylhydrazones. The catalyst system we developed for this reaction allows the cyclization to proceed under very mild conditions and thus could be applied to a wide range of substrates with acid- or base-sensitive functional groups. Furthermore, this methodology could be applied for the construction of benzoisoxazole ring system. In addition, catalytic C-H activation with palladium followed by intramolecular amination of benzophenone tosylhydrazones was also accomplished with the aid of the catalyst system such as Pd(OAc)(2)/Cu(OAc)(2)/AgOCOCF(3), which gave another route to indazoles. Using this combination, indazoles with various functional groups could be obtained in good to high yields, especially in the case of substrates having electron donating group such as methoxy group on benzene ring. Interesting chemo- and regioselectivity were also observed in this reaction.
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Affiliation(s)
- Kiyofumi Inamoto
- Graduate School of Pharmaceutical Sciences, Tohoku University, Japan.
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Inamoto K, Katsuno M, Yoshino T, Arai Y, Hiroya K, Sakamoto T. Synthesis of 3-substituted indazoles and benzoisoxazoles via Pd-catalyzed cyclization reactions: application to the synthesis of nigellicine. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.01.010] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Cravotto G, Giovenzana GB, Palmisano G, Penoni A, Pilati T, Sisti M, Stazi F. Convolutamydine A: the first authenticated absolute configuration and enantioselective synthesis. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.tetasy.2006.11.021] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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