51
|
García-Carrillo MA, Guzmán Á, Díaz E. Metal free coupling of heteroaryl N -tosylhydrazones and thiols: Efficient synthesis of sulfides. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.04.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
52
|
Zhang WM, Dai JJ, Xu J, Xu HJ. Visible-Light-Induced C2 Alkylation of Pyridine N-Oxides. J Org Chem 2017; 82:2059-2066. [DOI: 10.1021/acs.joc.6b02891] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Wen-Man Zhang
- School of Biological and
Medical Engineering, Hefei University of Technology, Hefei 230009, China
| | - Jian-Jun Dai
- School of Biological and
Medical Engineering, Hefei University of Technology, Hefei 230009, China
| | - Jun Xu
- School of Biological and
Medical Engineering, Hefei University of Technology, Hefei 230009, China
| | - Hua-Jian Xu
- School of Biological and
Medical Engineering, Hefei University of Technology, Hefei 230009, China
| |
Collapse
|
53
|
Parisotto S, Garreffa G, Canepa C, Diana E, Pellegrino F, Priola E, Prandi C, Maurino V, Deagostino A. Visible-Light-Driven Photocatalytic Transformation of α,β-Unsaturated-N-Tosylhydrazones: A Novel Route to Allylic Sulfones. CHEMPHOTOCHEM 2017. [DOI: 10.1002/cptc.201600037] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Stefano Parisotto
- Department of Chemistry; University of Torino; Via Giuria, 7 10125 Torino Italy
| | - Gabriele Garreffa
- Department of Chemistry; University of Torino; Via Giuria, 7 10125 Torino Italy
| | - Carlo Canepa
- Department of Chemistry; University of Torino; Via Giuria, 7 10125 Torino Italy
| | - Eliano Diana
- Department of Chemistry; University of Torino; Via Giuria, 7 10125 Torino Italy
| | | | - Emanuele Priola
- Department of Chemistry; University of Torino; Via Giuria, 7 10125 Torino Italy
| | - Cristina Prandi
- Department of Chemistry; University of Torino; Via Giuria, 7 10125 Torino Italy
| | - Valter Maurino
- Department of Chemistry; University of Torino; Via Giuria, 7 10125 Torino Italy
| | | |
Collapse
|
54
|
Transition Metal-Catalyzed C–H Functionalization of Heterocyclic N-Oxides. TOPICS IN HETEROCYCLIC CHEMISTRY 2017. [DOI: 10.1007/7081_2017_1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
55
|
Hwang C, Jo W, Cho SH. Base-promoted, deborylative secondary alkylation of N-heteroaromatic N-oxides with internal gem-bis[(pinacolato)boryl]alkanes: a facile derivatization of 2,2′-bipyridyl analogues. Chem Commun (Camb) 2017. [DOI: 10.1039/c7cc03731g] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A base-promoted, secondary alkylation of N-heteroaromatic N-oxides using internal gem-bis[(pinacolato)boryl]alkanes as alkylation reagents is achieved to form deoxygenated secondary alkylated N-heteroarenes.
Collapse
Affiliation(s)
- Chiwon Hwang
- Department of Chemistry
- Pohang University of Science and Technology (POSTECH)
- Pohang
- Republic of Korea
| | - Woohyun Jo
- Department of Chemistry
- Pohang University of Science and Technology (POSTECH)
- Pohang
- Republic of Korea
| | - Seung Hwan Cho
- Department of Chemistry
- Pohang University of Science and Technology (POSTECH)
- Pohang
- Republic of Korea
| |
Collapse
|
56
|
Qiu D, Mo F, Zhang Y, Wang J. Recent Advances in Transition-Metal-Catalyzed Cross-Coupling Reactions With N -Tosylhydrazones. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2017. [DOI: 10.1016/bs.adomc.2017.04.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
57
|
Castillo JC, Estupiñan D, Nogueras M, Cobo J, Portilla J. 6-(Aryldiazenyl)pyrazolo[1,5-a]pyrimidines as Strategic Intermediates for the Synthesis of Pyrazolo[5,1-b]purines. J Org Chem 2016; 81:12364-12373. [PMID: 27978735 DOI: 10.1021/acs.joc.6b02431] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A microwave-assisted approach for the regioselective synthesis of functionalized 6-(aryldiazenyl)pyrazolo[1,5-a]pyrimidin-7-amines from the cyclization of 3-oxo-2-(2-arylhydrazinylidene)butanenitriles with 5-amino-1H-pyrazoles under solvent-free conditions has been developed. This methodology was distinguished by its broad substrate scope, operational simplicity, high atom economy, and high-yielding without requiring chromatographic purification. In addition, an efficient and versatile palladium-catalyzed reductive azo cleavage is disclosed for the synthesis of diverse heteroaromatic 1,2-diamines, a valuable synthetic building block to develop new fused heteroaromatic systems. As synthetic example, several substituted pyrazolo[5,1-b]purines were synthesized in yields up to 96% by using microwave irradiation in the cyclocondensation of these 1,2-diamines with orthoesters.
Collapse
Affiliation(s)
- Juan-Carlos Castillo
- Bioorganic Compounds Research Group, Department of Chemistry, Universidad de los Andes , Carrera 1 No. 18A-10, Bogotá 111711, Colombia
| | - Diego Estupiñan
- Bioorganic Compounds Research Group, Department of Chemistry, Universidad de los Andes , Carrera 1 No. 18A-10, Bogotá 111711, Colombia
| | - Manuel Nogueras
- Departamento de Química Inorgánica y Orgánica, Universidad de Jaén , Jaén 23071, Spain
| | - Justo Cobo
- Departamento de Química Inorgánica y Orgánica, Universidad de Jaén , Jaén 23071, Spain
| | - Jaime Portilla
- Bioorganic Compounds Research Group, Department of Chemistry, Universidad de los Andes , Carrera 1 No. 18A-10, Bogotá 111711, Colombia
| |
Collapse
|
58
|
Srivastava A, Patel SS, Chandna N, Jain N. Copper-Catalyzed anti-Markovnikov Hydroindolation of Terminal Alkynes: Regioselective Synthesis of Bis(indolyl)alkanes. J Org Chem 2016; 81:11664-11670. [DOI: 10.1021/acs.joc.6b02058] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ananya Srivastava
- Department
of Chemistry, Indian Institute of Technology, Delhi 110016, India
| | - Shyam Sunder Patel
- Department
of Chemistry, Indian Institute of Technology, Delhi 110016, India
| | - Nisha Chandna
- Department
of Chemistry, Indian Institute of Technology, Delhi 110016, India
| | - Nidhi Jain
- Department
of Chemistry, Indian Institute of Technology, Delhi 110016, India
| |
Collapse
|
59
|
Cu6Se4.5 Nanoparticles from a single source precursor: Recyclable and efficient catalyst for cross-dehydrogenative coupling of tertiary amines with terminal alkynes. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcata.2016.06.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
60
|
Peng X, Huang P, Jiang L, Zhu J, Liu L. Palladium-catalyzed highly regioselective oxidative homocoupling of 1,2,3-triazole N-oxides. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.10.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
|
61
|
Biswas A, Karmakar U, Pal A, Samanta R. Copper-Catalyzed Regioselective Cascade Alkylation and Cyclocondensation of Quinoline N
-Oxides with Diazo Esters: Direct Access to Conjugated π-Systems. Chemistry 2016; 22:13826-13830. [DOI: 10.1002/chem.201602493] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Indexed: 02/03/2023]
Affiliation(s)
- Aniruddha Biswas
- Department of Chemistry; Indian Institute of Technology Kharagpur; Kharagpur 721302 India
| | - Ujjwal Karmakar
- Department of Chemistry; Indian Institute of Technology Kharagpur; Kharagpur 721302 India
| | - Arun Pal
- Department of Chemistry; Indian Institute of Technology Kharagpur; Kharagpur 721302 India
| | - Rajarshi Samanta
- Department of Chemistry; Indian Institute of Technology Kharagpur; Kharagpur 721302 India
| |
Collapse
|
62
|
Du B, Qian P, Wang Y, Mei H, Han J, Pan Y. Cu-Catalyzed Deoxygenative C2-Sulfonylation Reaction of Quinoline N-Oxides with Sodium Sulfinate. Org Lett 2016; 18:4144-7. [DOI: 10.1021/acs.orglett.6b02289] [Citation(s) in RCA: 120] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bingnan Du
- School of Chemistry and Chemical
Engineering, State Key laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, China
| | - Ping Qian
- School of Chemistry and Chemical
Engineering, State Key laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, China
| | - Yang Wang
- School of Chemistry and Chemical
Engineering, State Key laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, China
| | - Haibo Mei
- School of Chemistry and Chemical
Engineering, State Key laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, China
| | - Jianlin Han
- School of Chemistry and Chemical
Engineering, State Key laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, China
| | - Yi Pan
- School of Chemistry and Chemical
Engineering, State Key laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, China
| |
Collapse
|