1
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Liu TT, Chen Y, Mei GJ, Hua YZ, Jia SK, Wang MC. Zinc-Catalyzed Enantioselective [3 + 3] Annulation for Synthesis of Chiral Spiro[indoline-3,4'-thiopyrano[2,3- b]indole] Derivatives. Molecules 2023; 28:molecules28031056. [PMID: 36770723 PMCID: PMC9920981 DOI: 10.3390/molecules28031056] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/12/2023] [Accepted: 01/16/2023] [Indexed: 01/24/2023] Open
Abstract
With a dinuclear zinc-ProPhenol complex as a catalyst, an efficient and novel [3 + 3] annulation of indoline-2-thiones and isatylidene malononitriles has been successfully developed via the Brønsted base and Lewis acid cooperative activation model. This practical methodology gives access to a broad range of chiral spiro[indoline-3,4'-thiopyrano[2,3-b]indole] derivatives in good yields with excellent levels of enantioselectivities (up to 88% yield and 99% ee).
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Affiliation(s)
| | | | | | | | - Shi-Kun Jia
- Correspondence: (Y.-Z.H.); (S.-K.J.); (M.-C.W.)
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2
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GaCl3 catalyzed the cascade Michael/ketalization of o-hydroxychalcones with indoline-2-thiones: For the construction of indole-annulated 2-oxa-8-thiabicyclo[3.3.1]nonane derivatives. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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3
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Chen KG, Lu H, Zhou YM, Wan XL, Wang HY, Xu ZJ, Guo HM, Che CM. Fe-BPsalan Complex-Catalyzed Asymmetric [4 + 2] Cycloaddition of Cyclopentadiene with α,β-Unsaturated Heterocycles. J Org Chem 2022; 87:8289-8302. [PMID: 35726727 DOI: 10.1021/acs.joc.1c02798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient iron-catalyzed asymmetric [4 + 2] cycloaddition of cyclopentadiene with α,β-unsaturated acyl imidazoles or 2-cinnamoylisoindoline-1,3-dione derivatives was developed to afford the addition products in high yield and selectivity. Interestingly, the absolute structures of the addition products were controlled by the auxiliaries via different coordination modes with the same type of catalyst.
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Affiliation(s)
- Kai-Ge Chen
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.,Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, 345 Lingling Road, Shanghai 200032, China
| | - Hao Lu
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.,Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, 345 Lingling Road, Shanghai 200032, China
| | - Yi-Ming Zhou
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, 345 Lingling Road, Shanghai 200032, China
| | - Xiao-Long Wan
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, 345 Lingling Road, Shanghai 200032, China
| | - Hao-Yang Wang
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, 345 Lingling Road, Shanghai 200032, China
| | - Zhen-Jiang Xu
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, 345 Lingling Road, Shanghai 200032, China
| | - Hai-Ming Guo
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Chi-Ming Che
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, 345 Lingling Road, Shanghai 200032, China.,State Key Laboratory of Synthetic Chemistry, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, SAR, China.,HKU Shenzhen Institute of Research and Innovation, Shenzhen, Guangdong 518057, China
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4
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4-Dimethylaminopyridine-catalyzed [3 + 3] spiroannulation reactions of isatin-derived Morita-Baylis-Hillman carbonates with indoline-2-thiones. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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5
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Suresh A, Lal S, Namboothiri INN. Regio- and stereoselective synthesis of functionalized and fused heterocycles from Morita-Baylis-Hillman adducts of dicyclopentadienone. Org Biomol Chem 2022; 20:2271-2281. [PMID: 35234778 DOI: 10.1039/d1ob02505h] [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
An efficient protocol for the Morita-Baylis-Hillman (MBH) reaction of dicyclopentadienone using CTAB has been developed. The MBH adduct was subsequently transformed to its acetate and bromide derivatives. The 1,3-bielectrophilic character of the MBH acetate and bromide was further explored with various 1,3-binucleophiles to construct various oxa-, thia- and aza-heterocycles. These reactions proceed through a cascade double Michael addition of 1,3-binucleophiles to the MBH acetate/bromide under basic conditions. Amenability of these reactions to scale-up and applications of the products in the synthesis of cyclopentenone-fused chromenones and thiopyranoindoles have been demonstrated.
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Affiliation(s)
- Alati Suresh
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400 076, India.
| | - Sohan Lal
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400 076, India.
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6
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Wang W, Bao X, Wei S, Nawaz S, Qu J, Wang B. Asymmetric sequential annulation/aldol process of 4-isothiocyanato pyrazolones and allenones: access to novel spiro[pyrrole-pyrazolones] and spiro[thiopyranopyrrole-pyrazolones]. Chem Commun (Camb) 2021; 57:363-366. [PMID: 33319884 DOI: 10.1039/d0cc07113g] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A catalytic asymmetric sequential annulation/aldol reaction of 4-isothiocyanato pyrazolones and allenyl ketones has been developed, which furnished a series of spiro[pyrrole-pyrazolone] heterocycles and structurally novel spiro[thiopyranopyrrole-pyrazolone] derivatives in good yields with high to excellent enantioselectivities. Notably, parallel resolution of racemic spiro[pyrrole-pyrazolones] was achieved by a catalyst-controlled asymmetric intramolecular vinylogous aldol process. Structure diversity of the product was further enhanced by ready transformations.
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Affiliation(s)
- Wenyao Wang
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, People's Republic of China.
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7
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Basu P, Hazra C, Baiju TV, Namboothiri INN. Synthesis of tetrahydrothiopyrano[2,3-b]indoles via [3+3] annulation of nitroallylic acetates with indoline-2-thiones. NEW J CHEM 2020. [DOI: 10.1039/c9nj04754a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
[3+3] annulation of 1,3-binucleophilic indolin-2-thione with 1,3-bielectrophilic nitroallylic acetate via an SN2-reaction-6-endo-trig cyclization takes place with high regio- and stereoselectivity to afford tetrahydrothiopyranoindoles.
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Affiliation(s)
- Pallabita Basu
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076
- India
| | - Chiranjit Hazra
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076
- India
| | - Thekke V. Baiju
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076
- India
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8
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Sanz-Novo M, Alonso ER, León I, Alonso JL. The Shape of the Archetypical Oxocarbon Squaric Acid and Its Water Clusters. Chemistry 2019; 25:10748-10755. [PMID: 31283059 DOI: 10.1002/chem.201901916] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Indexed: 12/15/2022]
Abstract
Herein, a full structural description is presented for the archetypical supramolecular synthone squaric acid (3,4-dihydroxy-3-cyclobutene-1,2-dione), placed in the gas phase by laser ablation and characterized by chirped pulse Fourier transform microwave technique. Free from natural environmental disturbances, two different anti-anti and syn-anti planar forms and the corresponding water clusters have been revealed in a supersonic expansion. The substitution structure of the most stable anti-anti conformer has also been extracted from the analysis of the rotational spectra of the 13 C and 18 O isotopic species in their natural abundance. The interplay between inter- and intramolecular interactions involving hydroxy and carbonyl groups has been analyzed by QTAIM (quantum theory of atoms in molecules) methods for squaric acid and its water clusters to understand their chemical behavior and further rationalize their role in the stabilization of these molecular systems.
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Affiliation(s)
- Miguel Sanz-Novo
- Grupo de Espectroscopía Molecular (GEM), Edificio Quifima Laboratorios de EspectroscopíayBioespectroscopía, Unidad Asociada CSIC, Parque Científico Uva, Universidad de Valladolid, Paseo de Belén 5, 47011, Valladolid, Spain
| | - Elena R Alonso
- Grupo de Espectroscopía Molecular (GEM), Edificio Quifima Laboratorios de EspectroscopíayBioespectroscopía, Unidad Asociada CSIC, Parque Científico Uva, Universidad de Valladolid, Paseo de Belén 5, 47011, Valladolid, Spain
| | - Iker León
- Grupo de Espectroscopía Molecular (GEM), Edificio Quifima Laboratorios de EspectroscopíayBioespectroscopía, Unidad Asociada CSIC, Parque Científico Uva, Universidad de Valladolid, Paseo de Belén 5, 47011, Valladolid, Spain
| | - J L Alonso
- Grupo de Espectroscopía Molecular (GEM), Edificio Quifima Laboratorios de EspectroscopíayBioespectroscopía, Unidad Asociada CSIC, Parque Científico Uva, Universidad de Valladolid, Paseo de Belén 5, 47011, Valladolid, Spain
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9
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Hou M, Lin L, Chai X, Zhao X, Qiao B, Jiang Z. Enantioselective photoredox dehalogenative protonation. Chem Sci 2019; 10:6629-6634. [PMID: 31367315 PMCID: PMC6625487 DOI: 10.1039/c9sc02000d] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 05/29/2019] [Indexed: 12/13/2022] Open
Abstract
We report an enantioselective photoredox dehalogenative protonation as a new type of asymmetric protonation. As a paradigm, with a cooperative catalytic system consisting of a chiral H-bonding catalyst and a dicyanopyrazine-derived chromophore (DPZ) photosensitizer that is irradiated with visible light, a range of cyclic and acyclic ketones with labile chiral secondary C-F, C-Cl and C-Br bonds at the α-position were obtained in high yields with good to excellent enantioselectivities (up to >99% ee) by using a secondary amine as the terminal reductant. Given the ready accessibility of halides, the success of this work should provide inspiration for constructing diverse chiral α-tertiary carbonyls and their variants.
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Affiliation(s)
- Meimei Hou
- Henan University , Jinming Campus , Kaifeng , Henan 475004 , China . ;
| | - Lu Lin
- Henan University , Jinming Campus , Kaifeng , Henan 475004 , China . ;
| | - Xiangpei Chai
- Henan University , Jinming Campus , Kaifeng , Henan 475004 , China . ;
| | - Xiaowei Zhao
- Henan University , Jinming Campus , Kaifeng , Henan 475004 , China . ;
| | - Baokun Qiao
- Henan University , Jinming Campus , Kaifeng , Henan 475004 , China . ;
| | - Zhiyong Jiang
- Henan University , Jinming Campus , Kaifeng , Henan 475004 , China . ;
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation , Key Laboratory of Green Chemical Media and Reactions , Ministry of Education , Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals , School of Chemistry and Chemical Engineering , Henan Normal University , Xinxiang , Henan 453007 , China
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10
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Mane V, Baiju TV, Namboothiri INN. Synthesis of Functionalized Thieno[2,3- b]indoles via One-Pot Reaction of Indoline-2-thiones with Morita-Baylis-Hillman and Rauhut-Currier Adducts of Nitroalkenes. ACS OMEGA 2018; 3:17617-17628. [PMID: 31458362 PMCID: PMC6643647 DOI: 10.1021/acsomega.8b02147] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 11/07/2018] [Indexed: 06/10/2023]
Abstract
A straightforward protocol for the synthesis of functionalized thieno[2,3-b]indoles by base-mediated [3 + 2]-annulation of indoline-2-thione with Morita-Baylis-Hillman and Rauhut-Currier adducts of nitroalkenes is described. Complete regioselectivity, broad substrate scope, and mild reaction conditions make this strategy very valuable. Moreover, the thieno[2,3-b]indoles comprising functional groups such as hydrazine and ketoalkyl moieties are amenable for further synthetic elaboration.
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11
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Abstract
The use of small organic molecules as catalysts has gained increasing importance recently. These substances, the so-called organocatalysts, present a lot of advantages, like being less toxic, less polluting, and more economically viable than the organometallic catalysts that dominate asymmetric synthesis. This work intends to briefly show some classic works and recent publications, explaining the advantages of organocatalysis and the different types of compounds used in this field, as well as their course of action.
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12
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Enantioselective synthesis of indolo[2,3-b]-dihydrothiopyranones via [3+3] cycloaddition of chiral α,β-unsaturated acylammonium salts. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.09.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Andrés JM, Losada J, Maestro A, Rodríguez-Ferrer P, Pedrosa R. Supported and Unsupported Chiral Squaramides as Organocatalysts for Stereoselective Michael Additions: Synthesis of Enantiopure Chromenes and Spirochromanes. J Org Chem 2017; 82:8444-8454. [PMID: 28738149 DOI: 10.1021/acs.joc.7b01177] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Novel supported chiral bifunctional squaramides have been easily prepared starting from diamines derived from natural amino acids and commercially available aminoalkyl polystyrene resins. These squaramides behave as excellent stereoselective recoverable organocatalysts in different Michael additions, in neat conditions at room temperature. The reaction on 2-(2-nitrovinyl) phenol as electrophile lead, in excellent yields and enantioselectivities, to intermediates that can be easily transformed into 4H-chromenes, and spirochromanones.
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Affiliation(s)
- José M Andrés
- Instituto CINQUIMA and Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Valladolid , Paseo de Belén 7, 47011 Valladolid, Spain
| | - Jorge Losada
- Instituto CINQUIMA and Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Valladolid , Paseo de Belén 7, 47011 Valladolid, Spain
| | - Alicia Maestro
- Instituto CINQUIMA and Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Valladolid , Paseo de Belén 7, 47011 Valladolid, Spain
| | - Patricia Rodríguez-Ferrer
- Instituto CINQUIMA and Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Valladolid , Paseo de Belén 7, 47011 Valladolid, Spain
| | - Rafael Pedrosa
- Instituto CINQUIMA and Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Valladolid , Paseo de Belén 7, 47011 Valladolid, Spain
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14
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Ni C, Zhang Y, Hou Y, Tong X. Access to thiopyrano[2,3-b]indole via tertiary amine-catalyzed formal (3+3) annulations of β′-acetoxy allenoates with indoline-2-thiones. Chem Commun (Camb) 2017; 53:2567-2570. [DOI: 10.1039/c6cc09788j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Amine-catalyzed formal (3+3) annulations of β′-acetoxy allenoates with indoline-2-thiones are described, which provide facile access to thiopyrano[2,3-b]indole.
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Affiliation(s)
- Chunjie Ni
- College of Chemistry and Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Yuwen Zhang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology
- School of Petrochemical Engineering, Changzhou University
- Changzhou 213164
- China
| | - Yading Hou
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology
- School of Petrochemical Engineering, Changzhou University
- Changzhou 213164
- China
| | - Xiaofeng Tong
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology
- School of Petrochemical Engineering, Changzhou University
- Changzhou 213164
- China
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15
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Yi L, Chen KQ, Liang ZQ, Sun DQ, Ye S. N-Heterocyclic Carbene-Catalyzed [3+3] Annulation of Indoline-2-thiones with Bromoenals: Synthesis of Indolo[2,3-b]dihydrothiopyranones. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600726] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Liang Yi
- Marine College; Shandong University at Weihai; 180 Wenhua West Road Weihai 264209 People's Republic of China
- Beijing National Laboratory for Molecular Science, Key Laboratory of Molecular Recognition and Functional, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 People's Republic of China
| | - Kun-Quan Chen
- Beijing National Laboratory for Molecular Science, Key Laboratory of Molecular Recognition and Functional, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 People's Republic of China
- University of Chinese Academy of Sciences; Beijing 100049 People's Republic of China
| | - Zhi-Qin Liang
- Beijing National Laboratory for Molecular Science, Key Laboratory of Molecular Recognition and Functional, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 People's Republic of China
- University of Chinese Academy of Sciences; Beijing 100049 People's Republic of China
| | - De-Qun Sun
- Marine College; Shandong University at Weihai; 180 Wenhua West Road Weihai 264209 People's Republic of China
| | - Song Ye
- Beijing National Laboratory for Molecular Science, Key Laboratory of Molecular Recognition and Functional, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 People's Republic of China
- University of Chinese Academy of Sciences; Beijing 100049 People's Republic of China
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16
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Liu W, Lai X, Zha G, Xu Y, Sun P, Xia T, Shen Y. The squaramide-catalyzed asymmetric Michael/cyclization tandem reaction for the synthesis of chiral trifluoromethylated hydroxyimino tetrahydrobenzofuranones. Org Biomol Chem 2016; 14:3603-7. [PMID: 26978187 DOI: 10.1039/c6ob00119j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
An enantioselective synthesis of trifluoromethylated hydroxyimino tetrahydrobenzofuranones has been developed. 1,3-Dicarbonyl carbocyclic compounds react with β-CF3-β-disubstituted nitroalkenes in the presence of a chiral squaramide catalyst, providing efficient access to diverse hydroxyimino tetrahydrobenzofuranones featuring a trifluoromethyl group at the C3-position of an all-carbon quaternary stereocenter with good yields (up to 81%) and enantioselectivities (up to 89% ee).
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Affiliation(s)
- Wei Liu
- Department of Pharmacy, School of chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, People's Republic of China.
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17
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Han X, Zhou HB, Dong C. Applications of Chiral Squaramides: From Asymmetric Organocatalysis to Biologically Active Compounds. CHEM REC 2016; 16:897-906. [DOI: 10.1002/tcr.201500266] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Indexed: 12/18/2022]
Affiliation(s)
- Xin Han
- State Key Laboratory of Virology; Laboratory of Combinatorial Biosynthesis and Drug Discovery Ministry of Education Wuhan University School of Pharmaceutical Sciences; Wuhan 430071 P. R. China
| | - Hai-Bing Zhou
- State Key Laboratory of Virology; Laboratory of Combinatorial Biosynthesis and Drug Discovery Ministry of Education Wuhan University School of Pharmaceutical Sciences; Wuhan 430071 P. R. China
| | - Chune Dong
- State Key Laboratory of Virology; Laboratory of Combinatorial Biosynthesis and Drug Discovery Ministry of Education Wuhan University School of Pharmaceutical Sciences; Wuhan 430071 P. R. China
- Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences; Shanghai 200032 P. R. China
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18
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Pan J, Wang Y, Chen S, Zhang X, Wang Y, Zhou Z. Stereocontrolled construction of 2-(3-indolyl)chromane scaffolds via organocatalyzed cascade Michael addition-hemiketalization followed by Friedel–Crafts alkylation reaction. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.11.042] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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19
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Wu LL, Zheng Y, Wang YM, Zhou ZH. Organocatalyzed enantioselective [3 + 3] annulation for the direct synthesis of conformationally constrained cyclic tryptophan derivatives. RSC Adv 2016. [DOI: 10.1039/c5ra24288f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Synthesis of optically active conformationally strained β-branched cyclic tryptophan derivatives has been realized via chiral squaramide catalyzed enantioselective formal [3 + 3] annulation of indolin-2-thiones and 4-arylmethylideneoxazolin-5(4H)-ones.
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Affiliation(s)
- L.-L. Wu
- Institute and State Key Laboratory of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
| | - Y. Zheng
- Institute and State Key Laboratory of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
| | - Y.-M. Wang
- Institute and State Key Laboratory of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
| | - Z.-H. Zhou
- Institute and State Key Laboratory of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
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20
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Singh S, Samanta S. Efficient One-Pot Access to 2,9-Dihydrothiopyrano[2,3-b]indole Scaffolds Showing Large Stokes Shifts. CHINESE J CHEM 2015. [DOI: 10.1002/cjoc.201500572] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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21
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Amireddy M, Chen K. Organocatalytic synthesis of spirocyclohexane indane-1,3-diones via a chiral squaramide-catalyzed Michael/aldol cascade reaction of γ-nitro ketones and 2-arylideneindane-1,3-diones. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.08.061] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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22
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Chauhan P, Mahajan S, Kaya U, Hack D, Enders D. Bifunctional Amine-Squaramides: Powerful Hydrogen-Bonding Organocatalysts for Asymmetric Domino/Cascade Reactions. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201401003] [Citation(s) in RCA: 412] [Impact Index Per Article: 45.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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23
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Wang HX, Wu LL, Wang YM, Zhou ZH. Organocatalyzed asymmetric tandem Michael-cyclization reaction of 4-benzylidene-3-methylpyrazol-5-ones and malononitrile: stereocontrolled construction of pyrano[2,3-c]pyrazole scaffold. RSC Adv 2015. [DOI: 10.1039/c5ra04356e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Stereocontrolled construction of pyrano[2,3-c]pyrazole scaffold has been realized via chiral squaramide catalyzed asymmetric tandem Michael addition/cyclization reaction of 4-benzylidenepyrazol-5(4H)-ones and malononitrile.
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Affiliation(s)
- H.-X. Wang
- State Key Laboratory of Elemento-Organic Chemistry
- Institute of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071
| | - L.-L. Wu
- State Key Laboratory of Elemento-Organic Chemistry
- Institute of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071
| | - Y.-M. Wang
- State Key Laboratory of Elemento-Organic Chemistry
- Institute of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071
| | - Z.-H. Zhou
- State Key Laboratory of Elemento-Organic Chemistry
- Institute of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071
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Zheng Y, Wang Y, Zhou Z. Organocatalytic multicomponent synthesis of polysubstituted pyrroles from 1,2-diones, aldehydes and arylamines. Chem Commun (Camb) 2015; 51:16652-5. [DOI: 10.1039/c5cc05624a] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We have developed an organocatalyzed three-component reaction of 1,2-diones, aldehydes and arylamines, which provides an efficient approach to access polysubstituted pyrroles.
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Affiliation(s)
- Yin Zheng
- Institute and State Key Laboratory of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering Nankai University
- Tianjin 300071
- P. R. China
| | - Youming Wang
- Institute and State Key Laboratory of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering Nankai University
- Tianjin 300071
- P. R. China
| | - Zhenghong Zhou
- Institute and State Key Laboratory of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering Nankai University
- Tianjin 300071
- P. R. China
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25
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26
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Cui LY, Wang YH, Chen SR, Wang YM, Zhou ZH. Stereocontrolled construction of 3H-furo[3,4-b]chromen-1(9H)-one scaffolds via organocatalyzed Michael addition and the following intramolecular dehydration. RSC Adv 2015. [DOI: 10.1039/c5ra17503h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Stereocontrolled construction of 3H-furo[3,4-b]chromen-1(9H)-one scaffolds has been realized via chiral squaramide catalyzed asymmetric Michael addition of tetronic acid to 2-((E)-2-nitrovinyl)phenols and the subsequent intramolecular dehydration.
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Affiliation(s)
- L.-Y. Cui
- Institute and State Key Laboratory of Elemento-Organic Chemistry
- P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071
| | - Y.-H. Wang
- Institute and State Key Laboratory of Elemento-Organic Chemistry
- P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071
| | - S.-R. Chen
- Institute and State Key Laboratory of Elemento-Organic Chemistry
- P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071
| | - Y.-M. Wang
- Institute and State Key Laboratory of Elemento-Organic Chemistry
- P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071
| | - Z.-H. Zhou
- Institute and State Key Laboratory of Elemento-Organic Chemistry
- P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071
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