1
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Li Y, Wan TB, Guo B, Qi XW, Zhu C, Shen MH, Xu HD. Quaternization of azido-N-heteroarenes with Meerwein reagent: a straightforward synthesis of 2-azido(benzo)imidazolium and related azido-N-heteroarenium tetrafluoroborates. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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2
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Wang Y, Wang YJ, Liang XC, Shen MH, Xu HD, Xu D. An aryl thiol-vinyl azide coupling reaction and a thiol-vinyl azide coupling/cyclization cascade: efficient synthesis of β-ketosulfides and arene-fused 5-methylene-2-pyrrolidinone derivatives. Org Biomol Chem 2021; 19:5169-5176. [PMID: 34037057 DOI: 10.1039/d1ob00328c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The addition reaction of thiol to vinyl azide has been extensively studied. Variously substituted aryl thiols are all viable for this coupling process. The scope of the other partner is successfully expanded from α-aryl vinyl azide to α-alkyl vinyl azide. A thiol-vinyl azide coupling/cyclization cascade is realized with substituted aryl vinyl azides carrying a 2-methoxycarbonyl group. The value of β-ketosulfide products was demonstrated by its application in S-heterocycle synthesis.
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Affiliation(s)
- Yong Wang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmacy, Changzhou University, Changzhou, Jiangsu Province 213164, China.
| | - Yu-Jiao Wang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmacy, Changzhou University, Changzhou, Jiangsu Province 213164, China.
| | - Xian-Chen Liang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmacy, Changzhou University, Changzhou, Jiangsu Province 213164, China.
| | - Mei-Hua Shen
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmacy, Changzhou University, Changzhou, Jiangsu Province 213164, China.
| | - Hua-Dong Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmacy, Changzhou University, Changzhou, Jiangsu Province 213164, China.
| | - Defeng Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmacy, Changzhou University, Changzhou, Jiangsu Province 213164, China.
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3
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Fan P, Liu TT, Qu HY, Tao P, Liu CX, Liu XQ, Shen MH, Bao X, Xu HD. Intramolecular Alder-ene cycloisomerization of cyclopropenes with alkenes to access spirocycles. Org Chem Front 2021. [DOI: 10.1039/d1qo00299f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An Alder-ene cycloisomerization creates 3D-shaped spirocycles from cyclopropenes.
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Affiliation(s)
- Peng Fan
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmacy, Changzhou University, Changzhou, Jiangsu Province 213164, China
| | - Tian-Tian Liu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123, China
| | - Hong-Yu Qu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmacy, Changzhou University, Changzhou, Jiangsu Province 213164, China
| | - Peng Tao
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmacy, Changzhou University, Changzhou, Jiangsu Province 213164, China
| | - Chun-Xia Liu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmacy, Changzhou University, Changzhou, Jiangsu Province 213164, China
| | - Xiao-Qian Liu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmacy, Changzhou University, Changzhou, Jiangsu Province 213164, China
| | - Mei-Hua Shen
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmacy, Changzhou University, Changzhou, Jiangsu Province 213164, China
| | - Xiaoguang Bao
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123, China
| | - Hua-Dong Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmacy, Changzhou University, Changzhou, Jiangsu Province 213164, China
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4
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Zhu Z, Lin H, Liang B, Huang J, Liang W, Chen L, Huang Y, Chen X, Li Y. Copper-catalyzed [2+3]-annulation of N-H imines with vinyl azides: access to polyaryl 2H-imidazoles. Chem Commun (Camb) 2020; 56:5621-5624. [PMID: 32297887 DOI: 10.1039/c9cc10042c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A practical method for the synthesis of 2H-imidazoles via a [2+3] annulation of N-H imines with vinyl azides using a copper catalyst is developed. In this conversion, environmentally friendly oxygen is used as the sole oxidant and N2 and H2O are the only by-products. The catalytic transformation, operating under mild conditions, is operationally simple and is considered as a readily available catalytic system having good substrate and functional compatibility with high atom-efficiency without the need for additional ligands or additives.
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Affiliation(s)
- Zhongzhi Zhu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China.
| | - Hanze Lin
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China.
| | - Baihui Liang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China.
| | - Junjie Huang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China.
| | - Wanyi Liang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China.
| | - Lu Chen
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China.
| | - Yubing Huang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China.
| | - Xiuwen Chen
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China.
| | - Yibiao Li
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China.
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5
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Zhang Q, Li Y, Wang J, Yang C, Liu C, Li X, Cheng J. B(C
6
F
5
)
3
/Chiral Phosphoric Acid Catalyzed Ketimine–Ene Reaction of 2‐Aryl‐3
H
‐indol‐3‐ones and α‐Methylstyrenes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915226] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qing‐Xia Zhang
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
| | - Yao Li
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
| | - Jie Wang
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
| | - Chen Yang
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
| | - Cheng‐Jun Liu
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
| | - Xin Li
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
| | - Jin‐Pei Cheng
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
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6
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Zhang QX, Li Y, Wang J, Yang C, Liu CJ, Li X, Cheng JP. B(C 6 F 5 ) 3 /Chiral Phosphoric Acid Catalyzed Ketimine-Ene Reaction of 2-Aryl-3H-indol-3-ones and α-Methylstyrenes. Angew Chem Int Ed Engl 2020; 59:4550-4556. [PMID: 31943586 DOI: 10.1002/anie.201915226] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 12/30/2019] [Indexed: 11/05/2022]
Abstract
The enantioselective ketimine-ene reaction is one of the most challenging stereocontrolled reaction types in organic synthesis. In this work, catalytic enantioselective ketimine-ene reactions of 2-aryl-3H-indol-3-ones with α-methylstyrenes were achieved by utilizing a B(C6 F5 )3 /chiral phosphoric acid (CPA) catalyst. These ketimine-ene reactions proceed well with low catalyst loading (B(C6 F5 )3 /CPA=2 mol %/2 mol %) under mild conditions, providing rapid and facile access to a series of functionalized 2-allyl-indolin-3-ones with very good reactivity (up to 99 % yield) and excellent enantioselectivity (up to 99 % ee). Theoretical calculations reveal that enhancement of the acidity of the chiral phosphoric acid by B(C6 F5 )3 significantly reduces the activation free energy barrier. Furthermore, collective favorable hydrogen-bonding interactions, especially the enhanced N-H⋅⋅⋅O hydrogen-bonding interaction, differentiates the free energy of the transition states of CPA and B(C6 F5 )3 /CPA, thereby inducing the improvement of stereoselectivity.
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Affiliation(s)
- Qing-Xia Zhang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Yao Li
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Jie Wang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Chen Yang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Cheng-Jun Liu
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Xin Li
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Jin-Pei Cheng
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
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7
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Shen MH, Zhang YM, Jiang C, Xu HD, Xu D. Ag-Catalyzed cycloisomerization of 1,6-enynamide: an intramolecular type II Alder-ene reaction. Org Chem Front 2020. [DOI: 10.1039/c9qo01258c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An unusual type II Alder-ene cycloisomerization of 1,6-enynamide to fused bicyclic N-heterocycles is achieved by silver catalysis. 6-Endo-trig cyclization of a keteneiminium silver intermediate is proposed as the key step.
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Affiliation(s)
- Mei-Hua Shen
- School of Pharmaceutical Engineering and Life Science
- Changzhou University
- Changzhou 213164
- China
| | - Yu-Mei Zhang
- School of Pharmaceutical Engineering and Life Science
- Changzhou University
- Changzhou 213164
- China
| | - Chun Jiang
- School of Pharmaceutical Engineering and Life Science
- Changzhou University
- Changzhou 213164
- China
| | - Hua-Dong Xu
- School of Pharmaceutical Engineering and Life Science
- Changzhou University
- Changzhou 213164
- China
| | - Defeng Xu
- School of Pharmaceutical Engineering and Life Science
- Changzhou University
- Changzhou 213164
- China
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8
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Ashitha KT, Vinaya PP, Krishna A, Vincent DC, Jalaja R, Varughese S, Balappa Somappa S. I2/TBHP mediated diastereoselective synthesis of spiroaziridines. Org Biomol Chem 2020; 18:1588-1593. [DOI: 10.1039/c9ob02711d] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A simple metal free protocol for the diastereoselective synthesis of spiroaziridines using easily accessible substrates is disclosed.
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Affiliation(s)
- Kizhakkan Thiruthi Ashitha
- Organic Chemistry Section
- Chemical Sciences and Technology Division
- Council of Scientific and Industrial Research (CSIR)-National Institute for Interdisciplinary Science and Technology (NIIST)
- Thiruvananthapuram-695019
- India
| | - Puthiya Purayil Vinaya
- Organic Chemistry Section
- Chemical Sciences and Technology Division
- Council of Scientific and Industrial Research (CSIR)-National Institute for Interdisciplinary Science and Technology (NIIST)
- Thiruvananthapuram-695019
- India
| | - Ajay Krishna
- Organic Chemistry Section
- Chemical Sciences and Technology Division
- Council of Scientific and Industrial Research (CSIR)-National Institute for Interdisciplinary Science and Technology (NIIST)
- Thiruvananthapuram-695019
- India
| | - Deepthy Cheeran Vincent
- Organic Chemistry Section
- Chemical Sciences and Technology Division
- Council of Scientific and Industrial Research (CSIR)-National Institute for Interdisciplinary Science and Technology (NIIST)
- Thiruvananthapuram-695019
- India
| | - Renjitha Jalaja
- Organic Chemistry Section
- Chemical Sciences and Technology Division
- Council of Scientific and Industrial Research (CSIR)-National Institute for Interdisciplinary Science and Technology (NIIST)
- Thiruvananthapuram-695019
- India
| | - Sunil Varughese
- Organic Chemistry Section
- Chemical Sciences and Technology Division
- Council of Scientific and Industrial Research (CSIR)-National Institute for Interdisciplinary Science and Technology (NIIST)
- Thiruvananthapuram-695019
- India
| | - Sasidhar Balappa Somappa
- Organic Chemistry Section
- Chemical Sciences and Technology Division
- Council of Scientific and Industrial Research (CSIR)-National Institute for Interdisciplinary Science and Technology (NIIST)
- Thiruvananthapuram-695019
- India
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9
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Borra S, Borkotoky L, Newar UD, Kalwar A, Das B, Maurya RA. Visible light triggered photo-decomposition of vinyl azides to (E)-stilbene derivatives via 1,2-acyl migration. Org Biomol Chem 2019; 17:5971-5981. [PMID: 31165843 DOI: 10.1039/c9ob01035a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient photocatalyst-free visible light assisted synthetic route to various (E)-stilbene derivatives was developed. The reaction proceeds through a denitrogenative photo-decomposition of vinyl azides into 2H-azirines followed by neighboring amino group assisted ring opening, 1,2-acyl migration and enolization. The photochemical reaction offers light harvesting without any photocatalyst to access a wide variety of substituted (E)-stilbenes in moderate to high yields.
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Affiliation(s)
- Satheesh Borra
- Applied Organic Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology (NEIST), Jorhat-785006, Assam, India.
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10
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Khlebnikov AF, Novikov MS, Rostovskii NV. Advances in 2H-azirine chemistry: A seven-year update. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.03.040] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Shen MH, Qu HY, Dai P, Zhou H, Liu TS, Bao X, Xu D, Xu HD. Intramolecular Imino-ene Reaction of Azirines: Regioselectivity, Diastereoselectivity, and Computational Insights. J Org Chem 2019; 84:4095-4103. [PMID: 30808174 DOI: 10.1021/acs.joc.9b00087] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Intramolecular imino-ene reaction of 2 H-aziridine has been studied experimentally and computationally, demonstrating that (1) the concerted process takes place regioselectively on the alkene E-CH group; (2) the geometry of the N-linker impacts the reaction activation energy and diastereoselectivity significantly, with pyramidal alkyl amine as the linkage, an exclusive cis-product is achieved; (3) when the reaction has to occur with the Z-CH group, the cis-diastereoselectivity is solely observed regardless of the nature of the N-linkage.
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Affiliation(s)
- Mei-Hua Shen
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmaceutical Engineering & Life Science , Changzhou University , Changzhou 213164 , P. R. China
| | - Hong-Yu Qu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmaceutical Engineering & Life Science , Changzhou University , Changzhou 213164 , P. R. China
| | - Ping Dai
- College of Chemistry, Chemical Engineering and Materials Science , Soochow University , 199 Ren-Ai Road, Suzhou Industrial Park , Suzhou , Jiangsu 215123 , China
| | - Hao Zhou
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmaceutical Engineering & Life Science , Changzhou University , Changzhou 213164 , P. R. China
| | - Tai-Shang Liu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmaceutical Engineering & Life Science , Changzhou University , Changzhou 213164 , P. R. China
| | - Xiaoguang Bao
- College of Chemistry, Chemical Engineering and Materials Science , Soochow University , 199 Ren-Ai Road, Suzhou Industrial Park , Suzhou , Jiangsu 215123 , China
| | - Defeng Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmaceutical Engineering & Life Science , Changzhou University , Changzhou 213164 , P. R. China
| | - Hua-Dong Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmaceutical Engineering & Life Science , Changzhou University , Changzhou 213164 , P. R. China
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12
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Shen MH, Liang XC, Li C, Wu H, Qu HY, Wang FM, Xu HD. Rhodium promoted intramolecular [4 + 2] cycloaddition of 2-azidodiene with alkyne: A transition metal catalysis approach to challenging fused bicyclic vinyl azide. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.03.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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13
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Singh GS. Advances in synthesis and chemistry of aziridines. ADVANCES IN HETEROCYCLIC CHEMISTRY 2019. [DOI: 10.1016/bs.aihch.2018.12.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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