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1
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Miao H, Wang ZX. Ruthenium‐Catalyzed Oxidative Cross Coupling of Alkenes with Triisopropylsilylacetylene. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200172] [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)
- Hong Miao
- University of Science and Technology of China Department of Chemistry 96 Jinzhai Road 230026 Hefei CHINA
| | - Zhong-Xia Wang
- University of Science & Technology of China Chemistry 96 Jinzhai Road 230026 Hefei CHINA
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2
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Muragishi K, Asahara H, Nishiwaki N. Hydrohalogenation of Ethynylpyridines Involving Nucleophilic Attack of a Halide Ion. ACS OMEGA 2017; 2:1265-1272. [PMID: 31457502 PMCID: PMC6640932 DOI: 10.1021/acsomega.7b00133] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Accepted: 03/23/2017] [Indexed: 06/10/2023]
Abstract
Efficient hydrochlorination of 2-ethynylpyridines was achieved without the use of special reagents. Ethynylpyridine readily reacts with hydrochloric acid to form a pyridinium salt. The salt formation considerably enhances the electrophilicity of the ethynyl group and attracts a chloride ion as the counteranion. The spatial proximity facilitates the nucleophilic addition of the halide anion to the ethynyl group, producing 2-(2-chloroethenyl)pyridine in high yields. This protocol could also be applied for hydrobromination and hydroiodination using hydrobromic and hydroiodic acids, respectively. In the case of acetic acid, the reaction did not proceed because of the low acidity and lack of salt formation. This problem was overcome by exchanging the counteranion using silver acetate; the resultant pyridinium acetate underwent hydroacetoxylation.
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Affiliation(s)
- Kengo Muragishi
- School
of Environmental Science and Engineering and Research Center for Material Science
and Engineering, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan
| | - Haruyasu Asahara
- School
of Environmental Science and Engineering and Research Center for Material Science
and Engineering, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan
| | - Nagatoshi Nishiwaki
- School
of Environmental Science and Engineering and Research Center for Material Science
and Engineering, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan
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3
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Álvarez CM, Álvarez‐Miguel L, García‐Rodríguez R, Martín‐Álvarez JM, Miguel D. 3‐(Pyridin‐2‐yl)imidazo[1,5‐
a
]pyridine (Pyridylindolizine) as Ligand in Complexes of Transition and Main‐Group Metals. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500776] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Celedonio M. Álvarez
- GIR MIOMET‐IU CINQUIMA, Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Paseo de Belén 7, 47011 Valladolid, Spain, http://danielmiguel.blogs.uva.es/
| | - Lucía Álvarez‐Miguel
- GIR MIOMET‐IU CINQUIMA, Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Paseo de Belén 7, 47011 Valladolid, Spain, http://danielmiguel.blogs.uva.es/
| | - Raúl García‐Rodríguez
- GIR MIOMET‐IU CINQUIMA, Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Paseo de Belén 7, 47011 Valladolid, Spain, http://danielmiguel.blogs.uva.es/
| | - Jose M. Martín‐Álvarez
- GIR MIOMET‐IU CINQUIMA, Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Paseo de Belén 7, 47011 Valladolid, Spain, http://danielmiguel.blogs.uva.es/
| | - Daniel Miguel
- GIR MIOMET‐IU CINQUIMA, Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Paseo de Belén 7, 47011 Valladolid, Spain, http://danielmiguel.blogs.uva.es/
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4
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Zhai LH, Guo LH, Sun BW. Copper-catalyzed intramolecular dehydrogenative cyclization: direct access to sensitive formyl-substituted imidazo[1,2-a]pyridines. RSC Adv 2015. [DOI: 10.1039/c5ra19085a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
A direct method for the synthesis of formyl-substituted imidazo[1,2-a]pyridines was achieved easily from cyclization of aminopyridines and cinnamaldehydes via copper catalysis.
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Affiliation(s)
- Li-Hai Zhai
- School of Chemistry and Chemical Engineering
- Southeast University
- Nanjing
- China
- Lunan Pharmaceutical Co. Ltd
| | | | - Bai-Wang Sun
- School of Chemistry and Chemical Engineering
- Southeast University
- Nanjing
- China
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5
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Rajanarendar E, Reddy KG, Krishna SR, Srinivas M. A Facile One-pot Synthesis of Highly Functionalized Isoxazolyl Imidazo[1,2-a] Pyridines Through CuI-Promoted Cyclization. J Heterocycl Chem 2014. [DOI: 10.1002/jhet.2146] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- E. Rajanarendar
- Department of chemistry; Kakatiya University; Warangal 506009 Andhra Pradesh India
| | - K. G. Reddy
- Department of chemistry; Kakatiya University; Warangal 506009 Andhra Pradesh India
| | - S. R. Krishna
- Department of chemistry; Kakatiya University; Warangal 506009 Andhra Pradesh India
| | - M. Srinivas
- Department of chemistry; Kakatiya University; Warangal 506009 Andhra Pradesh India
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6
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Monir K, Kumar Bagdi A, Mishra S, Majee A, Hajra A. Copper(II)-Catalyzed Aerobic Oxidative Coupling between Chalcone and 2-AminopyridineviaCH Amination: An Expedient Synthesis of 3-Aroylimidazo[1,2-a]pyridines. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201300900] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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7
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Koszarna B, Matczak R, Krzeszewski M, Vakuliuk O, Klajn J, Tasior M, Nowicki JT, Gryko DT. Direct arylation of electron-poor indolizines. Tetrahedron 2014. [DOI: 10.1016/j.tet.2013.11.088] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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8
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Affiliation(s)
- Robert S. Sheridan
- Department of Chemistry, University of Nevada, Reno, Nevada 89557, United States
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9
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Santra S, Bagdi AK, Majee A, Hajra A. Iron(III)-Catalyzed Cascade Reaction between Nitroolefins and 2-Aminopyridines: Synthesis of Imidazo[1,2-a]pyridines and Easy Access towards Zolimidine. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201201112] [Citation(s) in RCA: 146] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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10
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Yan RL, Yan H, Ma C, Ren ZY, Gao XA, Huang GS, Liang YM. Cu(I)-Catalyzed Synthesis of Imidazo[1,2-a]pyridines from Aminopyridines and Nitroolefins Using Air as the Oxidant. J Org Chem 2012; 77:2024-8. [DOI: 10.1021/jo202447p] [Citation(s) in RCA: 171] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Ru-Long Yan
- State Key Laboratory of Applied Organic
Chemistry, Lanzhou University, Key Laboratory
of Nonferrous Metal
Chemistry and Resources Utilization of Gansu Province, Lanzhou 730000,
P. R. of China
| | - Hao Yan
- State Key Laboratory of Applied Organic
Chemistry, Lanzhou University, Key Laboratory
of Nonferrous Metal
Chemistry and Resources Utilization of Gansu Province, Lanzhou 730000,
P. R. of China
| | - Chao Ma
- State Key Laboratory of Applied Organic
Chemistry, Lanzhou University, Key Laboratory
of Nonferrous Metal
Chemistry and Resources Utilization of Gansu Province, Lanzhou 730000,
P. R. of China
| | - Zhi-Yong Ren
- State Key Laboratory of Applied Organic
Chemistry, Lanzhou University, Key Laboratory
of Nonferrous Metal
Chemistry and Resources Utilization of Gansu Province, Lanzhou 730000,
P. R. of China
| | - Xi-Ai Gao
- State Key Laboratory of Applied Organic
Chemistry, Lanzhou University, Key Laboratory
of Nonferrous Metal
Chemistry and Resources Utilization of Gansu Province, Lanzhou 730000,
P. R. of China
| | - Guo-Sheng Huang
- State Key Laboratory of Applied Organic
Chemistry, Lanzhou University, Key Laboratory
of Nonferrous Metal
Chemistry and Resources Utilization of Gansu Province, Lanzhou 730000,
P. R. of China
| | - Yong-Min Liang
- State Key Laboratory of Applied Organic
Chemistry, Lanzhou University, Key Laboratory
of Nonferrous Metal
Chemistry and Resources Utilization of Gansu Province, Lanzhou 730000,
P. R. of China
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11
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Álvarez CM, Álvarez-Miguel L, García-Rodríguez R, Miguel D. Complexes with 3-(pyridin-2-yl)imidazo[1,5-a]pyridine ligands by spontaneous dimerization of pyridine-2-carboxaldehyde within the coordination sphere of manganese(ii) in a one-pot reaction. Dalton Trans 2012; 41:7041-6. [DOI: 10.1039/c2dt30453h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Singh GS, Mmatli EE. Recent progress in synthesis and bioactivity studies of indolizines. Eur J Med Chem 2011; 46:5237-57. [DOI: 10.1016/j.ejmech.2011.08.042] [Citation(s) in RCA: 199] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Revised: 08/25/2011] [Accepted: 08/26/2011] [Indexed: 10/17/2022]
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13
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McClintock SP, Zakharov LN, Herges R, Haley MM. Coarctate versus Pericyclic Reactivity in Naphthalene-Fused Azo-Ene-Ynes: Synthesis of Benzocinnolines and Benzoisoindazoles. Chemistry 2011; 17:6798-806. [PMID: 21542030 DOI: 10.1002/chem.201002936] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Revised: 02/16/2011] [Indexed: 11/08/2022]
Affiliation(s)
- Sean P McClintock
- Department of Chemistry and Materials Science Institute, University of Oregon, Eugene, Oregon 97403-1253, USA
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14
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Zhu H, Stöckigt J, Yu Y, Zou H. “One-Pot” Multicomponent Approach to Indolizines and Pyrido[1,2-a]indoles. Org Lett 2011; 13:2792-4. [DOI: 10.1021/ol200883w] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Huajian Zhu
- Institute of Materia Medica, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P. R. China
| | - Joachim Stöckigt
- Institute of Materia Medica, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P. R. China
| | - Yongping Yu
- Institute of Materia Medica, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P. R. China
| | - Hongbin Zou
- Institute of Materia Medica, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P. R. China
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15
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Lahoz IR, López CS, Navarro-Vázquez A, Cid MM. Experimental and Computational Exploration of Indolizinyl Carbene Generation. A Route to Biindolizines. J Org Chem 2011; 76:3266-73. [DOI: 10.1021/jo200157q] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Inmaculada R Lahoz
- Departamento de Química Orgánica, Universidade de Vigo, Campus Lagoas-Marcosende, 36310 Vigo, Spain
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