1
|
Lai YL, Yan SX, Zhang SL, Huang YH, Hu RX, Chen YC, Luo JM, Li J. Palladium-Catalyzed Cascade Cyclization/Alkylation of Oxime Ethers: Assembly of 4-Alkylisoxazoles by "Chain-Walking" Strategy. Chem Asian J 2022; 17:e202200806. [PMID: 36000512 DOI: 10.1002/asia.202200806] [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: 08/02/2022] [Revised: 08/23/2022] [Indexed: 11/08/2022]
Abstract
A reliable and efficient palladium-catalyzed cascade cyclization/alkylation of oxime ethers with unactivated alkenes is described, affording a whole variety of structurally diverse isoxazole derivatives in moderate to good yields with excellent functional group compatibility. Ionic liquid [Aeim]Br not only acts as an environmentally friendly solvent but also acts as an accelerating agent to provide excess bromine source to eliminate bromomethane from oxime ethers. More importantly, the use of "chain-walking" strategy provides a novel methodology in organic synthesis to rapid generation of molecular complexity from readily available starting materials.
Collapse
Affiliation(s)
- Yin-Long Lai
- Shaoguan University, School of Chemistry and Chemical Engineering, CHINA
| | - Shao-Xi Yan
- Shaoguan University, School of Chemistry and Chemical Engineering, CHINA
| | - Sheng-Ling Zhang
- Shaoguan University, School of Chemistry and Chemical Engineering, CHINA
| | - Yu-Hong Huang
- Shaoguan University, School of Chemistry and Chemical Engineering, CHINA
| | - Ru-Xin Hu
- Shaoguan University, School of Chemistry and Chemical Engineering, CHINA
| | - Yang-Chong Chen
- Shaoguan University, School of Chemistry and Chemical Engineering, CHINA
| | - Jian-Min Luo
- Shaoguan University, School of Chemistry and Chemical Engineering, CHINA
| | - Jianxiao Li
- South China University of Technology, School of Chemistry and Chemical Engineering, wushan road, 510640, Guangzhou, CHINA
| |
Collapse
|
2
|
Feng Q, Huang H, Sun J. Ru-Catalyzed [3 + 2] Cycloaddition of Nitrile Oxides and Electron-Rich Alkynes with Reversed Regioselectivity. Org Lett 2021; 23:2431-2436. [PMID: 33750136 DOI: 10.1021/acs.orglett.1c00273] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Polarity reversal ("umpolung") of a functional group can override its inherent reactivity and lead to distinct bond-forming modes. Herein we describe a rarely studied cycloaddition between nitrile oxides and electron-rich alkynes with reversed regioselectivity, leading to the useful 4-heterosubstituted isoxazoles. The use of a ruthenium catalyst completely overrides the inherent polarity of nitrile oxides. This reversed regioselectivity was also observed for their reactions with a range of electron-deficient alkynes.
Collapse
Affiliation(s)
- Qiang Feng
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China.,Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Hai Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Jianwei Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China.,Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| |
Collapse
|
3
|
Li J, Lin Z, He D, Lin Z, Zheng Z, Bi C, Wu W, Jiang H. Palladium-catalyzed aerobic oxyarylthiolation of alkynone O-methyloximes with arylhydrazines and elemental sulfur. Org Biomol Chem 2021; 19:3396-3403. [PMID: 33899902 DOI: 10.1039/d1ob00388g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A novel and practical palladium-catalyzed aerobic oxyarylthiolation of alkynone O-methyloximes for the assembly of 4-sulfenylisoxazole derivatives using S8 and arylhydrazines as the S-aryl sources is accomplished. In the presence of 0.1 mol% of IPr-Pd-allyl-Cl as the catalyst and O2 (1 atm) as the sole oxidant, both alkynone O-methyloximes and arylhydrazines are suitable substrates, delivering diverse 4-sulfenyl isoxazoles in moderate to good yields with good functional group tolerance. Notably, the phenyl diazonium salt and sodium phenyl sulfinate are also suitable arylation reagents, providing an alternative synthetic strategy to access structurally diverse 4-sulfenyl isoxazoles.
Collapse
Affiliation(s)
- Jianxiao Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China. and Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou 510640, China
| | - Zidong Lin
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China.
| | - Dan He
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China.
| | - Zhicong Lin
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China.
| | - Zhixiang Zheng
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China.
| | - Chunhui Bi
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China.
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China.
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China.
| |
Collapse
|
4
|
Li J, Lin Z, Wu W, Jiang H. Recent advances in metal catalyzed or mediated cyclization/functionalization of alkynes to construct isoxazoles. Org Chem Front 2020. [DOI: 10.1039/d0qo00609b] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review summarized the recent developments in metal catalyzed or mediated cyclization/functionalization of alkynes to construct isoxazoles.
Collapse
Affiliation(s)
- Jianxiao Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Zidong Lin
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| |
Collapse
|
5
|
Gao WC, Cheng YF, Chang HH, Li X, Wei WL, Yang P. Synthesis of 4-Sulfenyl Isoxazoles through AlCl3-Mediated Electrophilic Cyclization and Sulfenylation of 2-Alkyn-1-one O-Methyloximes. J Org Chem 2019; 84:4312-4317. [DOI: 10.1021/acs.joc.9b00256] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Wen-Chao Gao
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
| | - Yu-Fei Cheng
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
| | - Hong-Hong Chang
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
| | - Xing Li
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
| | - Wen-Long Wei
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
| | - Peng Yang
- College of Chemistry, Chemical Engineering and Material Science, Shandong Normal University, Jinan 250014, P. R. China
| |
Collapse
|
6
|
Czudor Z, Balogh M, Bánhegyi P, Boros S, Breza N, Dobos J, Fábián M, Horváth Z, Illyés E, Markó P, Sipos A, Szántai-Kis C, Szokol B, Őrfi L. Novel compounds with potent CDK9 inhibitory activity for the treatment of myeloma. Bioorg Med Chem Lett 2018; 28:769-773. [PMID: 29329658 DOI: 10.1016/j.bmcl.2018.01.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 12/14/2017] [Accepted: 01/01/2018] [Indexed: 12/17/2022]
Abstract
Cyclin-dependent kinases (CDKs) and Polo-like kinases (PLKs) play key role in the regulation of the cell cycle. The aim of our study was originally the further development of our recently discovered polo-like kinase 1 (PLK1) inhibitors. A series of new 2,4-disubstituted pyrimidine derivatives were synthesized around the original hit, but their PLK1 inhibitory activity was very poor. However the novel compounds showed nanomolar CDK9 inhibitory activity and very good antiproliferative effect on multiple myeloma cell lines (RPMI-8226).
Collapse
Affiliation(s)
- Zsófia Czudor
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre u. 9, 1092 Budapest, Hungary
| | - Mária Balogh
- Vichem Chemie Research Ltd., Herman Ottó u. 15., 1022 Budapest, Hungary
| | - Péter Bánhegyi
- Vichem Chemie Research Ltd., Herman Ottó u. 15., 1022 Budapest, Hungary
| | - Sándor Boros
- Vichem Chemie Research Ltd., Herman Ottó u. 15., 1022 Budapest, Hungary
| | - Nóra Breza
- Vichem Chemie Research Ltd., Herman Ottó u. 15., 1022 Budapest, Hungary
| | - Judit Dobos
- Vichem Chemie Research Ltd., Herman Ottó u. 15., 1022 Budapest, Hungary
| | - Márk Fábián
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre u. 9, 1092 Budapest, Hungary
| | - Zoltán Horváth
- Vichem Chemie Research Ltd., Herman Ottó u. 15., 1022 Budapest, Hungary
| | - Eszter Illyés
- Vichem Chemie Research Ltd., Herman Ottó u. 15., 1022 Budapest, Hungary
| | - Péter Markó
- Vichem Chemie Research Ltd., Herman Ottó u. 15., 1022 Budapest, Hungary
| | - Anna Sipos
- Vichem Chemie Research Ltd., Herman Ottó u. 15., 1022 Budapest, Hungary
| | - Csaba Szántai-Kis
- Vichem Chemie Research Ltd., Herman Ottó u. 15., 1022 Budapest, Hungary
| | - Bálint Szokol
- Vichem Chemie Research Ltd., Herman Ottó u. 15., 1022 Budapest, Hungary
| | - László Őrfi
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre u. 9, 1092 Budapest, Hungary; Vichem Chemie Research Ltd., Herman Ottó u. 15., 1022 Budapest, Hungary.
| |
Collapse
|
7
|
Boss C, Bolli MH, Gatfield J. From bosentan (Tracleer®) to macitentan (Opsumit®): The medicinal chemistry perspective. Bioorg Med Chem Lett 2016; 26:3381-94. [DOI: 10.1016/j.bmcl.2016.06.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 06/03/2016] [Accepted: 06/06/2016] [Indexed: 11/24/2022]
|
8
|
Chorley DF, Furkert DP, Brimble MA. Synthesis of the Spiroketal Core of the Pinnatifinoside Family of Natural Products. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501225] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
9
|
Kanda Y, Kawanishi Y, Oda K, Sakata T, Mihara SI, Asakura K, Kanemasa T, Ninomiya M, Fujimoto M, Konoike T. Synthesis and structure–activity relationships of potent and orally active sulfonamide ETB selective antagonists. Bioorg Med Chem 2001; 9:897-907. [PMID: 11354672 DOI: 10.1016/s0968-0896(00)00305-9] [Citation(s) in RCA: 31] [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
The synthesis and structure activity relationships of a series of N-pyrimidinyl benzenesulfonamides as ETB selective antagonists are described. N-Isoxazolyl benzenesulfonamide 1a, previously reported, (1) was selected as a lead compound, and isosteric replacement of the isoxazole ring of 1a with a pyrimidine ring led to the discovery of the highly potent ETB selective antagonist 6e with oral bioavailability. Modification of the terminal aldehyde group at the 6-position of the pyrimidine ring was investigated, and malonate 15b and acylhydrazone 16f were found to be equipotent to aldehyde 6e. Compound 6e showed ETB antagonistic activity on in vivo evaluation.
Collapse
Affiliation(s)
- Y Kanda
- Shionogi Research Laboratories, Shionogi & Co, Ltd, Osaka, Japan.
| | | | | | | | | | | | | | | | | | | |
Collapse
|