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Liu X, Pei J, Gao Z, Gao H. Synthesis of ortho-Phosphated (Hetero)Arylamines through Cascade Atherton-Todd Reaction/[3,3]-Rearrangement from Arylhydroxylamines and Dialkyl Phosphites. Org Lett 2022; 24:7690-7695. [PMID: 36222849 DOI: 10.1021/acs.orglett.2c03269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A practical and facile strategy for the synthesis of ortho-phosphated (hetero)arylamines from readily available arylhydroxylamines and dialkyl phosphites via cascade Atherton-Todd reaction/[3,3]-rearrangement was developed. This method is amenable to various arylhydroxylamines such as phenylhydroxylamines, naphthylhydroxylamines, and pyridylhydroxylamines, has mild reaction conditions, is oxidant-free, and has good functional-group compatibility and excellent regioselectivity.
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Affiliation(s)
- Xiao Liu
- School of Chemistry and Chemical Engineering, Shandong University, 27 South Shanda Road, Ji'nan 250100, Shandong, China
| | - Jingtai Pei
- School of Chemistry and Chemical Engineering, Shandong University, 27 South Shanda Road, Ji'nan 250100, Shandong, China
| | - Zhiwei Gao
- School of Chemistry and Chemical Engineering, Shandong University, 27 South Shanda Road, Ji'nan 250100, Shandong, China
| | - Hongyin Gao
- School of Chemistry and Chemical Engineering, Shandong University, 27 South Shanda Road, Ji'nan 250100, Shandong, China
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2
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Li Y, Cao Z, Wang Z, Xu L, Wei Y. Copper-Catalyzed Reactions of Alkenyl Boronic Esters via Chan-Evans-Lam Coupling/Annulation Cascades: Substrate Selective Synthesis of Dihydroquinazolin-4-ones and Polysubstituted Quinolines. Org Lett 2022; 24:6554-6559. [PMID: 36036773 DOI: 10.1021/acs.orglett.2c02522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Copper-catalyzed cascade cyclization reactions between alkenyl boronic esters and N-H-based nucleophiles have been established, providing new approaches for one-pot assembly of azacycles. Following the Chan-Evans-Lam C-N couplings, the cyclization processes occur via divergent pathways based on the utilized substrates, affording hydroamination product dihydroquinazolin-4-ones or aromatization product quinolines. Via this one-pot C-N coupling/annulation cascade, the target substituted azacycles can be obtained in moderate to good yields in each case.
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Affiliation(s)
- Yuge Li
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, P. R. China
| | - Zifeng Cao
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, P. R. China
| | - Zhijun Wang
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, P. R. China
| | - Liang Xu
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, P. R. China
| | - Yu Wei
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, P. R. China
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3
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Bi HY, Wu QY, Zhou XM, Xu HJ, Liang C, Mo DL, Ma XP. Chan-Lam Reaction and Lewis Acid Promoted 1,3-Rearrangement of N-O Bonds to Prepare N-(2-Hydroxyaryl)pyridin-2-ones. Org Lett 2022; 24:4675-4679. [PMID: 35713172 DOI: 10.1021/acs.orglett.2c01827] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We describe the difunctionalization of arylboronic acids to prepare various N-(2-hydroxyaryl)pyridin-2-ones in good yields using N-hydroxypyridin-2-ones as the oxygen and nitrogen sources through a copper(II)-catalyzed Chan-Lam reaction and subsequent BF3-promoted selective 1,3-rearrangement of N-O bond in a one-pot procedure. Mechanistic studies reveal that the 1,3-rearrangement selectivity is controlled by the formation of the key aryloxypyridinium salt. The obtained products are easily converted to various useful pyridin-2-one scaffolds.
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Affiliation(s)
- Hong-Yan Bi
- College of Pharmacy, Guilin Medical University, 1 Zhi Yuan Road, Guilin 541199, China.,State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
| | - Qing-Yan Wu
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
| | - Xiao-Mei Zhou
- College of Pharmacy, Guilin Medical University, 1 Zhi Yuan Road, Guilin 541199, China
| | - Hui-Juan Xu
- College of Pharmacy, Guilin Medical University, 1 Zhi Yuan Road, Guilin 541199, China
| | - Cui Liang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
| | - Dong-Liang Mo
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
| | - Xiao-Pan Ma
- College of Pharmacy, Guilin Medical University, 1 Zhi Yuan Road, Guilin 541199, China
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4
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Zhang G, Sun S, Hou S, Xu J. Diverse and chemoselective sigmatropic shift rearrangements of multisubstituted N, O-diarylhydroxylamines. Org Biomol Chem 2022; 20:5470-5480. [PMID: 35775435 DOI: 10.1039/d2ob00771a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
N,O-Diarylhydroxylamines generally favor the [3,3] sigmatropic shift rearrangement. Possible N/O[1,3] sigmatropic shift rearrangements of multisubstituted N,O-diarylhydroxylamines were investigated experimentally with rationally designed substrates, which were generally in situ prepared from suitable nitroaryl halides and N-arylhydroxylamines via aromatic nucleophilic substitution. The results indicate that both N- and O-(2,4,6-trimethylphenyl)hydroxylamines still favor the [3,3] sigmatropic shift followed by tautomerization rather than N[1,3] and O[1,3] sigmatropic shifts and the rearranged products of N-(2,4,6-trimethylphenyl)hydroxylamines further undergo an intramolecular nucleophilic addition to afford dibenzo[b,d]furan-4a(9bH)-amine derivatives, while N-(4-mono- and 3,5-disubstituted phenyl)-O-(2,4,6-trinitrophenyl)hydroxylamines favorably first undergo the O[1,3] sigmatropic shift followed by tandem Smiles rearrangement and amide/ester exchange reactions, generating 2-arylaminoaryl benzoate derivatives. N-Phenyl-O-(2,4,6-trinitrophenyl)hydroxylamines undergo tandem double O[1,3] sigmatropic shift rearrangement to produce formal O[1,5] shift products. However, O-(2,6-dinitrophenyl)-N-(4-substituted phenyl)hydroxylamines undergo tandem O[1,3] and double [3,3] sigmatropic shift rearrangements to give formal 3,5-shift products. The proposed mechanism is rationalized by density functional theory (DFT) calculations. The current investigation provides not only a comprehensive understanding of the chemoselective sigmatropic shift rearrangements of N,O-diarylhydroxylamines, but also some novel synthetic strategies for dibenzo[b,d]furanamines, diarylamines, diaryl ethers, 2'-amino-[1,1'-biphenyl]-2(1H)-one, and 2'-amino-[1,1'-biaryl]-4-ol derivatives.
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Affiliation(s)
- Guangyu Zhang
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Simin Sun
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Shili Hou
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guangxi 541004, China
| | - Jiaxi Xu
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China.
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5
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Liu Y, Bai S, Du Y, Qi X, Gao H. Expeditious and Efficient
ortho
‐Selective Trifluoromethane‐sulfonylation of Arylhydroxylamines. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202115611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yue Liu
- School of Chemistry and Chemical Engineering Shandong University 27 South Shanda Road Ji'nan 250100, Shandong China
| | - Songlin Bai
- National Institute of Biological Sciences Beijing 102206 China
- Tsinghua Institute of Multidisciplinary Biomedical Research Tsinghua University Beijing 100084 China
| | - Yuanbo Du
- School of Chemistry and Chemical Engineering Shandong University 27 South Shanda Road Ji'nan 250100, Shandong China
| | - Xiangbing Qi
- National Institute of Biological Sciences Beijing 102206 China
- Tsinghua Institute of Multidisciplinary Biomedical Research Tsinghua University Beijing 100084 China
| | - Hongyin Gao
- School of Chemistry and Chemical Engineering Shandong University 27 South Shanda Road Ji'nan 250100, Shandong China
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Liu Y, Bai S, Du Y, Qi X, Gao H. Expeditious and Efficient ortho-Selective Trifluoromethane-sulfonylation of Arylhydroxylamines. Angew Chem Int Ed Engl 2021; 61:e202115611. [PMID: 34904339 DOI: 10.1002/anie.202115611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Indexed: 12/14/2022]
Abstract
A metal- and oxidant-free, practical and efficient method for the synthesis of highly versatile and synthetically useful ortho-trifluoromethanesulfonylated anilines from arylhydroxylamines and trifluoromethanesulfinic chloride was developed. This rapid transformation proceeded smoothly with good yields and excellent ortho-selectivity in the absence of any metals or ligands. Mechanistically, the reaction comprised a noncanonical O-trifluoromethanesulfinylation of the arylhydroxylamine, and the subsequent [2,3]-sigmatropic rearrangement to afford ortho-trifluoromethanesulfonylated aniline derivatives. The practical application of this reaction was demonstrated by further conversion into a series of functional molecules under different reaction conditions.
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Affiliation(s)
- Yue Liu
- School of Chemistry and Chemical Engineering, Shandong University, 27 South Shanda Road, Ji'nan, 250100, Shandong, China
| | - Songlin Bai
- National Institute of Biological Sciences, Beijing, 102206, China.,Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing, 100084, China
| | - Yuanbo Du
- School of Chemistry and Chemical Engineering, Shandong University, 27 South Shanda Road, Ji'nan, 250100, Shandong, China
| | - Xiangbing Qi
- National Institute of Biological Sciences, Beijing, 102206, China.,Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing, 100084, China
| | - Hongyin Gao
- School of Chemistry and Chemical Engineering, Shandong University, 27 South Shanda Road, Ji'nan, 250100, Shandong, China
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7
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Zhang Z, Luo J, Gao H. Rapid Access to Fluorinated Anilides via DAST-Mediated Deoxyfluorination of Arylhydroxylamines. Org Lett 2021; 23:9332-9336. [PMID: 34797084 DOI: 10.1021/acs.orglett.1c03779] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new strategy for the synthesis of fluorinated anilides in the absence of metals and oxidants has been developed. This deoxyfluorination of N-arylhydroxylamines with diethylaminosulfur trifluoride (DAST) proceeded smoothly under mild conditions, and the ortho- or para-fluorinated aromatic amine products were prepared in moderate to good yields. Structurally diverse fluorinated anilides, including heterocyclic and pharmaceutically relevant molecules, can be efficiently constructed by this protocol.
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Affiliation(s)
- Zhuyong Zhang
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang 315211, China.,School of Chemistry and Chemical Engineering, Shandong University, Ji'nan, Shandong 250100, China
| | - Junfei Luo
- Institute of Mass Spectrometry, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang 315211, China
| | - Hongyin Gao
- School of Chemistry and Chemical Engineering, Shandong University, Ji'nan, Shandong 250100, China
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Liu F, Wang M, Qu J, Lu H, Gao H. Synthesis of non-C 2 symmetrical NOBIN-type biaryls through a cascade N-arylation and [3,3]-sigmatropic rearrangement from O-arylhydroxylamines and diaryliodonium salts. Org Biomol Chem 2021; 19:7246-7251. [PMID: 34387642 DOI: 10.1039/d1ob00636c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We developed herein a regioselective construction of non-C2 symmetrical NOBIN-type biaryls through a cascade N-arylation and [3,3]-sigmatropic rearrangement from O-arylhydroxylamines and diaryliodonium salts under mild conditions. The employment of copper salt could inhibit the further O-arylation of the newly formed biaryl products, otherwise, O-arylated NOBIN-type products were furnished in moderate to good isolated yields. The products of this protocol can be further converted into highly valuable functional molecules and heterocycles.
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Affiliation(s)
- Fengting Liu
- School of Chemistry and Chemical Engineering, Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Ji'nan 250100, China.
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9
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Chen K, Chen W, Chen F, Zhang H, Xu H, Zhou Z, Yi W. Synthesis of 2-aminobenzofurans via base-mediated [3 + 2] annulation of N-phenoxy amides with gem-difluoroalkenes. Org Chem Front 2021. [DOI: 10.1039/d1qo00709b] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Efficient metal-free [3 + 2] annulation of N-phenoxy amides with gem-difluoroalkenes has been realized for the assembly of 2-aminobenzofuran derivatives with potent cytotoxicity against cancer cell lines and application potential for DELs.
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Affiliation(s)
- Kaifeng Chen
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease
- School of Pharmaceutical Sciences & the Fifth Affiliated Hospital
- Guangzhou Medical University
- Guangzhou
- P. R. China
| | - Weijie Chen
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease
- School of Pharmaceutical Sciences & the Fifth Affiliated Hospital
- Guangzhou Medical University
- Guangzhou
- P. R. China
| | - Fangyuan Chen
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease
- School of Pharmaceutical Sciences & the Fifth Affiliated Hospital
- Guangzhou Medical University
- Guangzhou
- P. R. China
| | - Haiman Zhang
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease
- School of Pharmaceutical Sciences & the Fifth Affiliated Hospital
- Guangzhou Medical University
- Guangzhou
- P. R. China
| | - Huiying Xu
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease
- School of Pharmaceutical Sciences & the Fifth Affiliated Hospital
- Guangzhou Medical University
- Guangzhou
- P. R. China
| | - Zhi Zhou
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease
- School of Pharmaceutical Sciences & the Fifth Affiliated Hospital
- Guangzhou Medical University
- Guangzhou
- P. R. China
| | - Wei Yi
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease
- School of Pharmaceutical Sciences & the Fifth Affiliated Hospital
- Guangzhou Medical University
- Guangzhou
- P. R. China
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10
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Zhang G, Xu J. [3,3] Sigmatropic Shifts and Applications of Hydroxylamine Derivatives. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202103022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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