1
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He L, Liang C, Ouyang Y, Li L, Guo Y, Zhang P, Li W. α-Functionalization of ketones promoted by sunlight and heterogeneous catalysis in the aqueous phase. Org Biomol Chem 2022; 20:790-795. [PMID: 34994749 DOI: 10.1039/d1ob02249k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Herein, a protocol that combines heterogeneous catalysis and solar photocatalysis for the regioselective α-substitution of asymmetric ketones with quinoxalinones has been reported. The result indicates that the reaction is more likely to occur on the α-carbon. This strategy provides a green and efficient way for the α-functionalization of ketones. A singlet oxygen involved mechanism is suggested for the transformation.
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Affiliation(s)
- Lei He
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, China.
| | - Chenfeng Liang
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, China.
| | - Yani Ouyang
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, China.
| | - Lin Li
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, China.
| | - Yirui Guo
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, China.
| | - Pengfei Zhang
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, China.
| | - Wanmei Li
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, China.
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2
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Huang W, Zhang R, Zhang R, Yu J, Wang M. Radical hydrotrifluoromethylation of ynamides: a route toward β-CF 3 enamides. Org Chem Front 2022. [DOI: 10.1039/d2qo00045h] [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
We report here a radical hydrotrifluoromethylation of ynamides to provide an alternative route toward β-CF3 enamides.
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Affiliation(s)
- Wanqiao Huang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Ruzhong Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Ruxue Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Jianxin Yu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Mang Wang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
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3
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Motornov VA, Tabolin AA, Nelyubina YV, Nenajdenko VG, Ioffe SL. Copper-catalyzed [3 + 2]-cycloaddition of α-halonitroalkenes with azomethine ylides: facile synthesis of multisubstituted pyrrolidines and pyrroles. Org Biomol Chem 2021; 19:3413-3427. [PMID: 33899878 DOI: 10.1039/d1ob00146a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient route for the synthesis of multifunctionalized pyrrolidines based on copper-catalyzed diastereoselective [3 + 2]-cycloaddition of nitroalkenes with azomethine ylides was developed. Novel fluorinated heterocycles - β-fluoro-β-nitropyrrolidines - were accessed via this method. The products can be prepared in good to excellent yields and with high diastereoselectivity. Subsequent transformations of pyrrolidines including oxidative aromatization into fluorinated pyrrolines and medicinally attractive β-fluoro-NH-pyrroles as well as chemoselective reduction reactions were demonstrated. Application of the developed procedures for the non-fluorinated analogues was demonstrated to lead to various β-substituted pyrrole derivatives.
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Affiliation(s)
- Vladimir A Motornov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prosp. 47, Moscow, 119991, Russia.
| | - Andrey A Tabolin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prosp. 47, Moscow, 119991, Russia.
| | - Yulia V Nelyubina
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str. 28, Moscow, 119991, Russia
| | - Valentine G Nenajdenko
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991, Russia
| | - Sema L Ioffe
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prosp. 47, Moscow, 119991, Russia.
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4
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Trost BM, Hung CIJ, Mata G, Liu Y, Lu Y, Gnanamani E. Direct Enantio- and Diastereoselective Zn-ProPhenol-Catalyzed Mannich Reactions of CF 3- and SCF 3-Substituted Ketones. Org Lett 2020; 22:2437-2441. [PMID: 32142302 DOI: 10.1021/acs.orglett.0c00646] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Enantioselective incorporation of trifluoromethyl (-CF3) and trifuoromethylthio (-SCF3) groups in small molecules is of high interest to modulate the potency and pharmacological properties of drug candidates. Herein, we report a Zn-ProPhenol catalyzed diastereo- and enantioselective Mannich addition of α-trifluoromethyl- and α-trifuoromethylthio-substituted ketones. This transformation uses cyclic and acyclic ketones and generates quaternary trifluoromethyl and tetrasubstituted trifuoromethylthio stereogenic centers in excellent yields and selectivities.
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Affiliation(s)
- Barry M Trost
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Chao-I Joey Hung
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Guillaume Mata
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Ying Liu
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Yiye Lu
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Elumalai Gnanamani
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
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5
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Lou Y, Hu Y, Lu J, Guan F, Gong G, Yin Q, Zhang X. Dynamic Kinetic Asymmetric Reductive Amination: Synthesis of Chiral Primary β-Amino Lactams. Angew Chem Int Ed Engl 2018; 57:14193-14197. [DOI: 10.1002/anie.201809719] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Indexed: 12/22/2022]
Affiliation(s)
- Yazhou Lou
- Department of Chemistry and Shenzhen Grubbs Institute; Southern University of Science and Technology; Shenzhen Guangdong 518055 P. R. China
| | - Yutao Hu
- Department of Chemistry and Shenzhen Grubbs Institute; Southern University of Science and Technology; Shenzhen Guangdong 518055 P. R. China
| | - Jiaxiang Lu
- Department of Chemistry and Shenzhen Grubbs Institute; Southern University of Science and Technology; Shenzhen Guangdong 518055 P. R. China
| | - Fanfu Guan
- Department of Chemistry and Shenzhen Grubbs Institute; Southern University of Science and Technology; Shenzhen Guangdong 518055 P. R. China
| | - Gelin Gong
- Department of Chemistry and Shenzhen Grubbs Institute; Southern University of Science and Technology; Shenzhen Guangdong 518055 P. R. China
| | - Qin Yin
- Department of Chemistry and Shenzhen Grubbs Institute; Southern University of Science and Technology; Shenzhen Guangdong 518055 P. R. China
- Academy for Advanced Interdisciplinary Studies; Southern University of Science and Technology; Shenzhen Guangdong 518000 P. R. China
| | - Xumu Zhang
- Department of Chemistry and Shenzhen Grubbs Institute; Southern University of Science and Technology; Shenzhen Guangdong 518055 P. R. China
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6
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Lou Y, Hu Y, Lu J, Guan F, Gong G, Yin Q, Zhang X. Dynamic Kinetic Asymmetric Reductive Amination: Synthesis of Chiral Primary β-Amino Lactams. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201809719] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Yazhou Lou
- Department of Chemistry and Shenzhen Grubbs Institute; Southern University of Science and Technology; Shenzhen Guangdong 518055 P. R. China
| | - Yutao Hu
- Department of Chemistry and Shenzhen Grubbs Institute; Southern University of Science and Technology; Shenzhen Guangdong 518055 P. R. China
| | - Jiaxiang Lu
- Department of Chemistry and Shenzhen Grubbs Institute; Southern University of Science and Technology; Shenzhen Guangdong 518055 P. R. China
| | - Fanfu Guan
- Department of Chemistry and Shenzhen Grubbs Institute; Southern University of Science and Technology; Shenzhen Guangdong 518055 P. R. China
| | - Gelin Gong
- Department of Chemistry and Shenzhen Grubbs Institute; Southern University of Science and Technology; Shenzhen Guangdong 518055 P. R. China
| | - Qin Yin
- Department of Chemistry and Shenzhen Grubbs Institute; Southern University of Science and Technology; Shenzhen Guangdong 518055 P. R. China
- Academy for Advanced Interdisciplinary Studies; Southern University of Science and Technology; Shenzhen Guangdong 518000 P. R. China
| | - Xumu Zhang
- Department of Chemistry and Shenzhen Grubbs Institute; Southern University of Science and Technology; Shenzhen Guangdong 518055 P. R. China
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7
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Zhu CL, Wang C, Qin QX, Yruegas S, Martin CD, Xu H. Iron(II)-Catalyzed Azidotrifluoromethylation of Olefins and N-Heterocycles for Expedient Vicinal Trifluoromethyl Amine Synthesis. ACS Catal 2018; 8:5032-5037. [PMID: 29938121 DOI: 10.1021/acscatal.8b01253] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report herein an iron-catalyzed azidotrifluoromethylation method for expedient vicinal trifluoromethyl primary-amine synthesis. This method is effective for a broad range of olefins and N-heterocycles, and it facilitates efficient synthesis of a wide variety of vicinal trifluoromethyl primary amines, including those that prove difficult to synthesize with existing approaches. Our preliminary mechanistic studies revealed that the catalyst-promoted azido-group transfer proceeds through a carbo-radical instead of a carbocation species. Characterization of an active iron catalyst through X-ray crystallographic studies suggests that in situ generated, structurally novel iron-azide complexes promote the oxidant activation and selective azido-group transfer.
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Affiliation(s)
- Cheng-Liang Zhu
- Department of Chemistry, Georgia State University, 100 Piedmont Avenue SE, Atlanta, Georgia 30303, United States
| | - Cheng Wang
- Department of Chemistry, Georgia State University, 100 Piedmont Avenue SE, Atlanta, Georgia 30303, United States
| | - Qi-Xue Qin
- Department of Chemistry, Georgia State University, 100 Piedmont Avenue SE, Atlanta, Georgia 30303, United States
| | - Sam Yruegas
- Department of Chemistry and Biochemistry, Baylor University, 1 Bear Place, Waco, Texas 76798, United States
| | - Caleb D. Martin
- Department of Chemistry and Biochemistry, Baylor University, 1 Bear Place, Waco, Texas 76798, United States
| | - Hao Xu
- Department of Chemistry, Georgia State University, 100 Piedmont Avenue SE, Atlanta, Georgia 30303, United States
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8
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Wang Z, Yuan Z, Han X, Weng Z. Aluminium Chloride-Mediated Synthesis of 1-Chloro-2,2,2-Trifluoroethylidene-Substituted Pyrrolidones. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800275] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zeng Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry; Fuzhou University; Fujian 350108 People's Republic of China
| | - Zihang Yuan
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry; Fuzhou University; Fujian 350108 People's Republic of China
| | - Xiaoyan Han
- Testing and Analysis Center; Soochow University; Suzhou 215123 People's Republic of China
| | - Zhiqiang Weng
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry; Fuzhou University; Fujian 350108 People's Republic of China
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9
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Song T, Zhao X, Hu J, Dan W. Diastereoselective and Enantioselective Palladium-Catalyzed Allylic Substitution of Substituted Fluorinated Methylene Derivatives. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701739] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Tao Song
- Shanghai Key Lab of Chemical Assessment and Sustainability; School of Chemical Technology and Engineering; Tongji University; 1239 Siping Road 200092 Shanghai P.R. China
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 354 Fenglin Road 200032 Shanghai P R China
| | - Xiaoming Zhao
- Shanghai Key Lab of Chemical Assessment and Sustainability; School of Chemical Technology and Engineering; Tongji University; 1239 Siping Road 200092 Shanghai P.R. China
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 354 Fenglin Road 200032 Shanghai P R China
| | - Jiao Hu
- Shanghai Key Lab of Chemical Assessment and Sustainability; School of Chemical Technology and Engineering; Tongji University; 1239 Siping Road 200092 Shanghai P.R. China
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 354 Fenglin Road 200032 Shanghai P R China
| | - Wenyan Dan
- Shanghai Key Lab of Chemical Assessment and Sustainability; School of Chemical Technology and Engineering; Tongji University; 1239 Siping Road 200092 Shanghai P.R. China
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 354 Fenglin Road 200032 Shanghai P R China
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10
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Marciniak B, Walkowiak-Kulikowska J, Koroniak H. On the halofluorination reactions of olefins as selective, and an efficient methodology for the introduction of fluorine into organic molecules. J Fluor Chem 2017. [DOI: 10.1016/j.jfluchem.2017.09.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Chen J, Zhao X, Dan W. Diasteroselective and Enantioselective Ir-Catalyzed Allylic Substitutions of 1-Substituted 1-Fluoro-1-(arenesulfonyl)methylene Derivatives. J Org Chem 2017; 82:10693-10698. [DOI: 10.1021/acs.joc.7b01782] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jiteng Chen
- Shanghai
Key Lab of Chemical Assessment and Sustainability, School of Chemical
Technology and Engineering, Tongji University, 1239 Siping Road, 200092 Shanghai, P. R. China
- Key Laboratory of Organofluorine
Chemistry, Shanghai Institute
of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, P. R. China
| | - Xiaoming Zhao
- Shanghai
Key Lab of Chemical Assessment and Sustainability, School of Chemical
Technology and Engineering, Tongji University, 1239 Siping Road, 200092 Shanghai, P. R. China
- Key Laboratory of Organofluorine
Chemistry, Shanghai Institute
of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, P. R. China
| | - Wenyan Dan
- Shanghai
Key Lab of Chemical Assessment and Sustainability, School of Chemical
Technology and Engineering, Tongji University, 1239 Siping Road, 200092 Shanghai, P. R. China
- Key Laboratory of Organofluorine
Chemistry, Shanghai Institute
of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, P. R. China
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12
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Arimitsu S, Nakasone M. Stereoselective Organocatalytic Synthesis of α,α-Difluoro-γ,γ-Disubstituted Butenals. J Org Chem 2016; 81:6707-13. [DOI: 10.1021/acs.joc.6b01334] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Satoru Arimitsu
- Department of Chemistry,
Biology and Marine Science, University of the Ryukyus, Senbaru
1, Nishihara, Nakagami, Okinawa 903-0123, Japan
| | - Makoto Nakasone
- Department of Chemistry,
Biology and Marine Science, University of the Ryukyus, Senbaru
1, Nishihara, Nakagami, Okinawa 903-0123, Japan
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13
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Sankar U, Surya Kumar CV, Subramanian V, Balasubramanian KK, Mahalakshimi S. Stereo-, Regio-, and Chemoselective [3 + 2]-Cycloaddition of (2E,4E)-Ethyl 5-(Phenylsulfonyl)penta-2,4-dienoate with Various Azomethine Ylides, Nitrones, and Nitrile Oxides: Synthesis of Pyrrolidine, Isoxazolidine, and Isoxazoline Derivatives and a Computational Study. J Org Chem 2016; 81:2340-54. [PMID: 26886393 DOI: 10.1021/acs.joc.5b02845] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
One-pot chemo-, regio-, and stereoselective synthesis of series of heterocyclic and spiroheterocyclic compounds was accomplished through mono- and bis[3 + 2]-cycloaddition reactions of (2E,4E)-ethyl 5-(phenylsulfonyl)penta-2,4-dienoate as a dipolarophile with azomethine ylides, nitrones, and nitrile oxides in good yields. The structures of the products were established by spectroscopic techniques as well as by single-crystal XRD study, and DFT calculations were performed to further understand the mechanism of this [3 + 2]-cycloaddition reaction.
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Affiliation(s)
- Ulaganathan Sankar
- Department of Chemistry, Pachaiyappa's College, University of Madras , Chennai 600030, India
| | - Ch Venkata Surya Kumar
- Chemical Laboratory, CSIR-Central Leather Research Institute , Adyar, Chennai 600020, India
| | - V Subramanian
- Chemical Laboratory, CSIR-Central Leather Research Institute , Adyar, Chennai 600020, India
| | - K K Balasubramanian
- INSA Senior Scientist, Department of Chemistry, Indian Institute of Technology Madras , Chennai 600020, India
| | - S Mahalakshimi
- Department of Chemistry, Pachaiyappa's College, University of Madras , Chennai 600030, India
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14
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Zhang H, Chen J, Zhao XM. Enantioselective synthesis of fluorinated branched allylic compounds via Ir-catalyzed allylations of functionalized fluorinated methylene derivatives. Org Biomol Chem 2016; 14:7183-6. [DOI: 10.1039/c6ob01246a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Introduction of the functionalized monofluorinated methylenes into the allylic fragment under Ir catalysis gave the fluorinated branched allyl products in good to high yields with excellent regio- and enantioselectivities.
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Affiliation(s)
- Hongbo Zhang
- Shanghai Key Lab of Chemical Assessment and Sustainability
- Department of Chemistry
- Tongji University
- Shanghai 200092
- P. R. China
| | - Jiteng Chen
- Shanghai Key Lab of Chemical Assessment and Sustainability
- Department of Chemistry
- Tongji University
- Shanghai 200092
- P. R. China
| | - Xiao-Ming Zhao
- Shanghai Key Lab of Chemical Assessment and Sustainability
- Department of Chemistry
- Tongji University
- Shanghai 200092
- P. R. China
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15
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Rong M, Li D, Huang R, Huang Y, Han X, Weng Z. Synthesis of Allylic and Propargylic Trifluoromethyl Thioethers by Copper(I)-Catalyzed Trifluoromethylthiolation of Allylic Bromides and Propargylic Chlorides. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402480] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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16
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Yarmolchuk VS, Mykhalchuk VL, Mykhailiuk PK. Convenient synthesis of enantiopure (R-) and (S-)-3-fluoro-3-aminomethylpyrrolidines. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.03.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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Laurenson JAB, Parkinson JA, Percy JM, Rinaudo G, Roig R. Multigramme synthesis and asymmetric dihydroxylation of a 4-fluorobut-2E-enoate. Beilstein J Org Chem 2013; 9:2660-8. [PMID: 24367430 PMCID: PMC3869297 DOI: 10.3762/bjoc.9.301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Accepted: 11/08/2013] [Indexed: 11/29/2022] Open
Abstract
Esters of crotonic acid were brominated on a multigramme scale using a free radical procedure. A phase transfer catalysed fluorination transformed these species to the 4-fluorobut-2E-enoates reproducibly and at scale (48-53%, ca. 300 mmol). Asymmetric dihydroxylation reactions were then used to transform the butenoate, ultimately into all four diastereoisomers of a versatile fluorinated C4 building block at high enantiomeric-enrichment. The (DHQ)2AQN and (DHQD)2AQN ligands described by Sharpless were the most effective. The development and optimisation of a new and facile method for the determination of ee is also described; (19)F{(1)H} spectra recorded in d-chloroform/diisopropyl tartrate showed distinct baseline separated signals for different enantiomers.
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Affiliation(s)
- James A B Laurenson
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow G1 1XL, United Kingdom
- Carbosynth Ltd., 93 Innovation Drive, Milton Park, Abingdon, Oxfordshire OX14 4RZ, United Kingdom
| | - John A Parkinson
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow G1 1XL, United Kingdom
| | - Jonathan M Percy
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow G1 1XL, United Kingdom
| | - Giuseppe Rinaudo
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow G1 1XL, United Kingdom
| | - Ricard Roig
- Department of Chemistry, University of Leicester, University Road, Leicester LE1 7RH, United Kingdom
- Lallemand Gb Ingredients, Dock Road, Felixstowe, Suffolk IP11 3QW, United Kingdom
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18
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Zhang Z, Wang F, Mu X, Chen P, Liu G. Copper-Catalyzed Regioselective Fluorination of Allylic Halides. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201301891] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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19
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Zhang Z, Wang F, Mu X, Chen P, Liu G. Copper-catalyzed regioselective fluorination of allylic halides. Angew Chem Int Ed Engl 2013; 52:7549-53. [PMID: 23775917 DOI: 10.1002/anie.201301891] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Revised: 05/14/2013] [Indexed: 11/06/2022]
Abstract
Group activity: A novel copper-catalyzed fluorination of internal allylic bromides and chlorides has been developed by using Et3N⋅3 HF as the fluorine source. A functional group (FG) within the substrate is required to achieve the allylic fluorination, and a variety of secondary allylic fluoride compounds can be accessed in good yield with excellent regioselectivity.
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Affiliation(s)
- Zuxiao Zhang
- State Key Laboratory of Organometallic Chemistry, Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
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20
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Yarmolchuk VS, Shishkin OV, Starova VS, Zaporozhets OA, Kravchuk O, Zozulya S, Komarov IV, Mykhailiuk PK. Synthesis and Characterization of β-Trifluoromethyl-Substituted Pyrrolidines. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300121] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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21
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Fritz SP, Ali Z, Unthank MG, McGarrigle EM, Aggarwal VK. (2-Bromoethyl)sulfonium Trifluoromethanesulfonates in Stereoselective Annulation Reactions for the Formation of Fused Bicyclic Epoxides and Aziridines. Helv Chim Acta 2012. [DOI: 10.1002/hlca.201200455] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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22
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Al-Said MS, Ghorab MM, Nissan YM. Dapson in heterocyclic chemistry, part VIII: synthesis, molecular docking and anticancer activity of some novel sulfonylbiscompounds carrying biologically active 1,3-dihydropyridine, chromene and chromenopyridine moieties. Chem Cent J 2012; 6:64. [PMID: 22748424 PMCID: PMC3543391 DOI: 10.1186/1752-153x-6-64] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2012] [Accepted: 06/07/2012] [Indexed: 11/19/2022] Open
Abstract
Several new sulfonebiscompounds having a biologically active 1,2-dihydropyridine-2-one 3-19, acrylamide 20, chromene 21, 22 and chromenopyridine 23, 24 moieties were synthesized and evaluated as potential anticancer agents. The structures of the products were confirmed via elemental analyses and spectral data. The screening tests showed that many of the biscompounds obtained exhibited good anticancer activity against human breast cell line (MCF7) comparable to doxorubicin which was used as reference drug. Compounds 11, 17 and 24 showed IC50 values 35.40 μM, 29.86 μM and 30.99 μM, respectively. In order to elucidate the mechanism of action of the synthesized compounds as anticancer agents, docking on the active site of farnesyltransferase and arginine methyltransferase was also performed and good results were obtained.
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Affiliation(s)
- Mansour S Al-Said
- Medicinal, Aromatic and Poisonous Plants Research Center (MAPPRC), College of Pharmacy, King Saud University, 2457, Riyadh, 11451, Saudi Arabia
| | - Mostafa M Ghorab
- Medicinal, Aromatic and Poisonous Plants Research Center (MAPPRC), College of Pharmacy, King Saud University, 2457, Riyadh, 11451, Saudi Arabia
| | - Yassin M Nissan
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
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24
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Rajender Reddy L, Das SG, Liu Y, Prashad M. A facile asymmetric synthesis of either enantiomer of 2-substituted pyrrolidines. J Org Chem 2010; 75:2236-46. [PMID: 20201593 DOI: 10.1021/jo902710s] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new and general method for asymmetric synthesis of either enantiomer of 2-substituted pyrrolidines from a single starting material is described. Reductive cyclization of (S(S))-gamma-chloro-N-tert-butanesulfinyl ketimines with LiBHEt(3) in THF at -78 to 23 degrees C afforded (S(S),R)-N-tert-butanesulfinyl-2-substituted pyrrolidines in excellent yields (88-98%) and with high diastereoselectivity (99:1). The diastereoselectivity is controlled effectively by the choice of reducing agent. Thus, the corresponding epimers of (S(S),S)-2-substituted pyrrolidines were synthesized in good yields (87-98%) and with high diastereoslectivity (1:99) by simply switching the reducing agent from LiBHEt(3) to DIBAL-H/LiHMDS. Deprotection of N-tert-butanesulfinyl-2-substituted pyrrolidines using 4 N HCl in dioxane and MeOH gave the corresponding enantiomers of 2-substituted pyrrolidines in quantative yield. This method was found to be effective for a variety of substrates including aromatic, heteroaromatic, and aliphatic substituents. Extension of this methodology to the formation of 2-substituted piperidines is also illustrated. Reductive cyclization of (S(S))-delta-chloro-N-tert-butanesulfinyl ketimine with LiBHEt(3) in THF at -78 to 23 degrees C or DIBAL-H/LiHMDS in toluene at -78 to 0 degrees C afforded the (S(S),R)-N-tert-butanesulfinyl-2-substituted piperidines in excellent yield (98%) and with high diastereoselectivity (99:1) or (S(S),S)-N-tert-butanesulfinyl-2-substituted piperidines in good yield (98%) and with high diastereoselectivity (1:99), respectively.
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Affiliation(s)
- Leleti Rajender Reddy
- Chemical Research and Development, Novartis Pharmaceuticals Corporation, One Health Plaza, East Hanover, New Jersey 07936, USA.
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25
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Verniest G, Piron K, Van Hende E, Thuring JW, Macdonald G, Deroose F, De Kimpe N. Synthesis of aminomethylated 4-fluoropiperidines and 3-fluoropyrrolidines. Org Biomol Chem 2010; 8:2509-12. [DOI: 10.1039/c003380d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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27
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Davis BG, Maughan MAT, Chapman TM, Villard R, Courtney S. Novel cyclic sugar imines: carbohydrate mimics and easily elaborated scaffolds for aza-sugars. Org Lett 2002; 4:103-6. [PMID: 11772101 DOI: 10.1021/ol016970o] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] Representative simple or polyhydroxylated, pyrrolidine (e.g, DRAM) or piperidine (e.g., DNJ) imines not only are potential carbohydrate-processing enzyme inhibitors that may be formed as regioisomeric variants but also are scaffolds that may be rapidly elaborated to diversely functionalized aza-sugars through highly diastereoselective organometallic additions.
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Affiliation(s)
- Benjamin G Davis
- Dyson Perrins Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QY, UK.
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28
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Ling R, Ekhato I, Rubin J, Wustrow DJ. Synthesis of 4-alkyl-pyrrolidine-3-carboxylic acid stereoisomers. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00549-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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29
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Abstract
Many attempts have been made to prepare analogs of 4-quinolone antibacterial agents bearing novel ring systems, which might retain the favorable properties of these widely used antibacterial agents and at the same time increase activity against multidrug-resistant bacteria, streptococci, and anaerobic microorganisms. One such attempt involved bioisosteric exchange of the 1-N atom and 4a-C atom of naphthyridones, quinolones, and benzoxazines to produce a family of highly active pyridopyrimidines, quinolizines, and ofloxacin bioisosteres. These new antibacterial agents have been named collectively as the 2-pyridones. Many hundreds of 2-pyridones have been synthesized and evaluated in vitro and in vivo, and selected members are advancing toward human clinical trials. Preparation of these bioisosteres required the development of enabling chemistry, as previous methods were unsuccessful in producing the needed core structures. This review compares the structure-activity relationships of these agents with known trends among 4-quinolones, from which it is seen that there are many parallels, but also some significant departures as well. Generally, 2-pyridones are more highly active in vitro and in vivo and more water soluble than comparable 4-quinolones. These properties are posited to arise from electronic and conformational alternations in these new substances. Selected members show excellent pharmacodynamic properties, justifying the view that this is a very promising new class of totally synthetic antibacterial agents.
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Affiliation(s)
- Q Li
- Pharmaceutical Products Division, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, IL 60064-6101, USA.
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Li Q, Sowin T, Claiborne A, Lijewski L, Zhang X, Raye K, Mazdiyasni H, Arnold W, M. Melcher L, Wang W, Hasvold L, Fung A, T. W. Chu D, J. Plattner J. Practical Synthesis of 2-Pyridone Core: Ethyl 8-Chloro-1-cyclopropyl-7-fluoro-9-methyl-4-oxo-4H-quinolizinone-3-carboxylate. HETEROCYCLES 1999. [DOI: 10.3987/com-99-8500] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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31
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Fukui H, Shibata T, Naito T, Nakano J, Maejima T, Senda H, Iwatani W, Tatsumi Y, Suda M, Arika T. Synthesis and antibacterial activity of novel 7-(3-substituted-3 or 4-trifluoromethyl-1-pyrrolidinyl)-8-methoxyfluoroquinolones. Bioorg Med Chem Lett 1998; 8:2833-8. [PMID: 9873632 DOI: 10.1016/s0960-894x(98)00514-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The titled compounds were synthesized and evaluated for in vitro antibacterial activity. The (3R, 4S)-3-aminomethyl-4-trifluoromethyl derivative (S-34109) was confirmed to be optimal because of its superior activity against quinolone and methicillin-resistant Staphylococcus aureus and low side effect potential.
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Affiliation(s)
- H Fukui
- Central Research Institute, Kaken Pharmaceutical Co., Ltd., Kyoto, Japan
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