1
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Park SH, Lee S. Selective Synthesis of ( Z)- and ( E)-β-Fluoro-α,β-Unsaturated Amides Using Palladium-Catalyzed Aminocarbonylation. Org Lett 2023; 25:6925-6930. [PMID: 37690119 DOI: 10.1021/acs.orglett.3c02809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
The selective synthesis of (Z)- and (E)-β-fluoro-α,β-unsaturated amides via the palladium-catalyzed aminocarbonylation of 1-fluoro-2,2-diiodovinylarenes is described in the present study. Using {Pd(allyl)Cl}2 as a catalyst and DBU as a base in DMF, the primary product is (Z)-isomers. Conversely, the use of a Xantphos ligand along with {Pd(allyl)Cl}2 and Et3N as the bases in 1,4-dioxane leads to the selective formation of (E)-isomers. Notably, 1-fluoro-2,2-diiodovinylarenes with various substituents on the phenyl ring react with various secondary amines, producing the corresponding (Z)-isomeric amides with a high yield and selectivity. In contrast, (E)-isomeric amides exhibit lower yields and restricted applicability.
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Affiliation(s)
- Su Hyeon Park
- Department of Chemistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Sunwoo Lee
- Department of Chemistry, Chonnam National University, Gwangju 61186, Republic of Korea
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2
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Su J, Guo W, Liu Y, Kong L, Zheng H, Zhu G. Cu-catalyzed cascade difluoroalkylation/5- endo cyclization/β-fluorine cleavage of ynones. Chem Commun (Camb) 2023; 59:1821-1824. [PMID: 36722869 DOI: 10.1039/d2cc06068j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A copper-catalyzed, redox-neutral cascade difluoroalkylation/5-endo annulation/β-fluorine cleavage of ynones is developed, providing a direct and stereoselective method to access synthetically important α-monofluoroalkenyl cyclopentanones. Mechanistic studies suggest an unprecedented CuII-assisted β-fluorine fragmentation, which may be valuable for the challenging but important C-F bond activation. Moreover, the in situ generated difluorocarbene was found to serve as an effective reductant for the regeneration of copper(I) catalyst, thus avoiding the addition of external reductants.
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Affiliation(s)
- Jingwen Su
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P. R. China.
| | - Wenbin Guo
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P. R. China.
| | - Yi Liu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P. R. China.
| | - Lichun Kong
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P. R. China.
| | - Hanliang Zheng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P. R. China.
| | - Gangguo Zhu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P. R. China.
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3
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Allylic substitution reactions with fluorinated nucleophiles. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214455] [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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Larnaud F, Calata C, Prunier A, Le Guen C, Legay R, Pfund E, Lequeux T. Convergent access to mono-fluoroalkene-based peptidomimetics. Org Biomol Chem 2022; 20:1205-1218. [PMID: 35075471 DOI: 10.1039/d1ob02441h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The convergent and selective preparation of (Z)-monofluoroalkene-based dipeptide isosteres from functionalized fluorosulfones as a cornerstone is described. In this approach, the N-terminal amino group is introduced by a conjugate addition reaction of phthalimide onto fluorinated vinylsulfones containing α-amino-acid side chains while the C-terminal motif is linked to the fluorovinylic peptide bond mimic via the Julia-Kocienski reaction between fluorosulfones and substituted aldehydes bearing α-amino-acid side chains.
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Affiliation(s)
- Florent Larnaud
- Normandie Université, Laboratoire de Chimie Moléculaire et Thioorganique LCMT UMR 6507, ENSICAEN, UNICAEN, CNRS, 6 Bd. du Maréchal Juin, 14050 Caen, France.
| | - Charlène Calata
- Normandie Université, Laboratoire de Chimie Moléculaire et Thioorganique LCMT UMR 6507, ENSICAEN, UNICAEN, CNRS, 6 Bd. du Maréchal Juin, 14050 Caen, France.
| | - Anaïs Prunier
- Normandie Université, Laboratoire de Chimie Moléculaire et Thioorganique LCMT UMR 6507, ENSICAEN, UNICAEN, CNRS, 6 Bd. du Maréchal Juin, 14050 Caen, France.
| | - Clothilde Le Guen
- Normandie Université, Laboratoire de Chimie Moléculaire et Thioorganique LCMT UMR 6507, ENSICAEN, UNICAEN, CNRS, 6 Bd. du Maréchal Juin, 14050 Caen, France.
| | - Rémi Legay
- Normandie Université, Laboratoire de Chimie Moléculaire et Thioorganique LCMT UMR 6507, ENSICAEN, UNICAEN, CNRS, 6 Bd. du Maréchal Juin, 14050 Caen, France.
| | - Emmanuel Pfund
- Normandie Université, Laboratoire de Chimie Moléculaire et Thioorganique LCMT UMR 6507, ENSICAEN, UNICAEN, CNRS, 6 Bd. du Maréchal Juin, 14050 Caen, France.
| | - Thierry Lequeux
- Normandie Université, Laboratoire de Chimie Moléculaire et Thioorganique LCMT UMR 6507, ENSICAEN, UNICAEN, CNRS, 6 Bd. du Maréchal Juin, 14050 Caen, France.
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6
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Patra SA, Das Pattanayak P, Mohapatra D, Dinda R. Recent Advancement on Decarbonylation Reactions Assisted by Ru-complexes: Synthetic and Mechanistic Approach. Dalton Trans 2022; 51:8571-8582. [DOI: 10.1039/d2dt00241h] [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
This frontier article covers the recent advancements in the ruthenium complex catalysed decarbonylation reactions of different types of carbonyl compounds and provides a direction towards the mechanistic understanding involved in...
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Hirai G, Kato M, Koshino H, Nishizawa E, Oonuma K, Ota E, Watanabe T, Hashizume D, Tamura Y, Okada M, Miyagi T, Sodeoka M. Ganglioside GM3 Analogues Containing Monofluoromethylene-Linked Sialoside: Synthesis, Stereochemical Effects, Conformational Behavior, and Biological Activities. JACS AU 2021; 1:137-146. [PMID: 34467279 PMCID: PMC8395706 DOI: 10.1021/jacsau.0c00058] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Indexed: 05/12/2023]
Abstract
Glycoconjugates are an important class of biomolecules that regulate numerous biological events in cells. However, these complex, medium-size molecules are metabolically unstable, which hampers detailed investigations of their functions as well as their potential application as pharmaceuticals. Here we report sialidase-resistant analogues of ganglioside GM3 containing a monofluoromethylene linkage instead of the native O-sialoside linkage. Stereoselective synthesis of CHF-linked disaccharides and kinetically controlled Au(I)-catalyzed glycosylation efficiently furnished both stereoisomers of CHF-linked as well as CF 2 - and CH 2 -linked GM3 analogues. Like native GM3, the C-linked GM3 analogues inhibited the autophosphorylation of epidermal growth factor (EGF) receptor induced by EGF in vitro. Assay of the proliferation-enhancing activity toward Had-1 cells together with NMR-based conformational analysis showed that the (S)-CHF-linked GM3 analogue with exo-gauche conformation is the most potent of the synthesized compounds. Our findings suggest that exo-anomeric conformation is important for the biological functions of GM3.
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Affiliation(s)
- Go Hirai
- Graduate
School of Pharmaceutical Sciences, Kyushu
University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
- RIKEN
Cluster for Pioneering Resaerch, Synthetic Organic Chemistry Laboratory, 2-1, Hirosawa, Wako, Saitama 351-0198, Japan
- RIKEN
Center for Sustainable Resource Science, 2-1, Hirosawa, Wako, Saitama 351-0198, Japan
| | - Marie Kato
- RIKEN
Cluster for Pioneering Resaerch, Synthetic Organic Chemistry Laboratory, 2-1, Hirosawa, Wako, Saitama 351-0198, Japan
- Tokyo
Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Hiroyuki Koshino
- RIKEN
Center for Sustainable Resource Science, 2-1, Hirosawa, Wako, Saitama 351-0198, Japan
| | - Eri Nishizawa
- RIKEN
Cluster for Pioneering Resaerch, Synthetic Organic Chemistry Laboratory, 2-1, Hirosawa, Wako, Saitama 351-0198, Japan
- Tokyo
Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Kana Oonuma
- RIKEN
Center for Sustainable Resource Science, 2-1, Hirosawa, Wako, Saitama 351-0198, Japan
| | - Eisuke Ota
- RIKEN
Cluster for Pioneering Resaerch, Synthetic Organic Chemistry Laboratory, 2-1, Hirosawa, Wako, Saitama 351-0198, Japan
| | - Toru Watanabe
- RIKEN
Cluster for Pioneering Resaerch, Synthetic Organic Chemistry Laboratory, 2-1, Hirosawa, Wako, Saitama 351-0198, Japan
| | - Daisuke Hashizume
- RIKEN
Center for Emergent Matter Science, 2-1, Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yuki Tamura
- RIKEN
Cluster for Pioneering Resaerch, Synthetic Organic Chemistry Laboratory, 2-1, Hirosawa, Wako, Saitama 351-0198, Japan
| | - Mitsuaki Okada
- RIKEN
Cluster for Pioneering Resaerch, Synthetic Organic Chemistry Laboratory, 2-1, Hirosawa, Wako, Saitama 351-0198, Japan
- Tokyo
Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Taeko Miyagi
- Miyagi Cancer
Center Research Institute, Natori 981-1293, Japan
| | - Mikiko Sodeoka
- RIKEN
Cluster for Pioneering Resaerch, Synthetic Organic Chemistry Laboratory, 2-1, Hirosawa, Wako, Saitama 351-0198, Japan
- RIKEN
Center for Sustainable Resource Science, 2-1, Hirosawa, Wako, Saitama 351-0198, Japan
- Tokyo
Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
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Zhang J, Liu L, Duan J, Gu L, Chen B, Sun T, Gong Y. Stereoselective One-Pot Sequential Dehydrochlorination/trans
-Hydrofluorination Reaction of β-Chloro-α,β-unsaturated Aldehydes or Ketones: Facile Access to (Z
)-β-Fluoro-β-arylenals/β-Fluoro-β-arylenones. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700981] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jingli Zhang
- School of Chemistry, Chemical Engineering and Life Science; Wuhan University of Technology; Wuhan 430070 People's Republic of China
- School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology; 1037 Luoyu Road Wuhan 430074 People's Republic of China
| | - Liran Liu
- School of Chemistry, Chemical Engineering and Life Science; Wuhan University of Technology; Wuhan 430070 People's Republic of China
| | - Junxin Duan
- School of Materials Science and Engineering; Wuhan University of Technology; Wuhan 430070 People's Republic of China
| | - Lianghu Gu
- School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology; 1037 Luoyu Road Wuhan 430074 People's Republic of China
| | - Bifeng Chen
- School of Chemistry, Chemical Engineering and Life Science; Wuhan University of Technology; Wuhan 430070 People's Republic of China
| | - Taolei Sun
- School of Chemistry, Chemical Engineering and Life Science; Wuhan University of Technology; Wuhan 430070 People's Republic of China
| | - Yuefa Gong
- School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology; 1037 Luoyu Road Wuhan 430074 People's Republic of China
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Lytkina MA, Eliseenkov EV, Boyarskii VP, Petrov AA. Sodium difluoromethanesulfinate—A difluoromethylating agent toward protonated heterocyclic bases. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2017. [DOI: 10.1134/s1070428017040066] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Gao B, Hu J, Zhao Y, Hu J. Carbonyl olefination of diaryl ketones with heteroaryl sulfoxides. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.05.034] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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He Z, Tan P, Ni C, Hu J. Fluoroalkylative Aryl Migration of Conjugated N-Arylsulfonylated Amides Using Easily Accessible Sodium Di- and Monofluoroalkanesulfinates. Org Lett 2015; 17:1838-41. [DOI: 10.1021/acs.orglett.5b00308] [Citation(s) in RCA: 144] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Zhengbiao He
- Key Laboratory of Organofluorine
Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Ping Tan
- Key Laboratory of Organofluorine
Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Chuanfa Ni
- Key Laboratory of Organofluorine
Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Jinbo Hu
- Key Laboratory of Organofluorine
Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
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12
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Laporte R, Prunier A, Pfund E, Roy V, Agrofoglio LA, Lequeux T. Synthesis of Fluorine-Containing 3,3-Disubstituted Oxetanes and Alkylidene Oxetanes. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500172] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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13
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Habib S, Gueyrard D. Modified Julia Olefination on Sugar-Derived Lactones: Synthesis of Difluoro-exo-glycals. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403175] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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14
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Sano S, Matsumoto T, Nanataki H, Tempaku S, Nakao M. Z-Selective Horner–Wadsworth–Emmons reaction of 2-TOM-cyclopentanone for the synthesis of rac-N-Cbz-Gly-Ψ[(Z)-CF C]-Pro-OH dipeptide isostere. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.09.077] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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15
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Larnaud F, Pfund E, Linclau B, Lequeux T. Stereoselective formation of (Z)-2-fluoroalkenoates via Julia–Kocienski reaction of aldehydes with pyrimidinyl-fluorosulfones. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.06.081] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Ni C, Hu M, Hu J. Good partnership between sulfur and fluorine: sulfur-based fluorination and fluoroalkylation reagents for organic synthesis. Chem Rev 2014; 115:765-825. [PMID: 25144886 DOI: 10.1021/cr5002386] [Citation(s) in RCA: 928] [Impact Index Per Article: 92.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Chuanfa Ni
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Ling-Ling Road, Shanghai City, Shanghai 200032, China
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Sano S, Matsumoto T, Nakao M. E-Selective Horner–Wadsworth–Emmons reaction of 2-OBO-cyclopentanone for the synthesis of rac-N-Cbz-Gly-Ψ[(E)-CFC]-Pro-OH dipeptide isostere. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.06.063] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Synthesis of regiospecifically fluorinated conjugated dienamides. Molecules 2014; 19:4418-32. [PMID: 24727415 PMCID: PMC4440806 DOI: 10.3390/molecules19044418] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2014] [Revised: 03/22/2014] [Accepted: 03/31/2014] [Indexed: 11/17/2022] Open
Abstract
Modular synthesis of regiospecifically fluorinated 2,4-diene Weinreb amides, with defined stereochemistry at both double bonds, was achieved via two sequential Julia-Kocienski olefinations. In the first step, a Z-α-fluorovinyl Weinreb amide unit with a benzothiazolylsulfanyl substituent at the allylic position was assembled. This was achieved via condensation of two primary building blocks, namely 2-(benzo[d]thiazol-2-ylsulfonyl)-2-fluoro-N-methoxy-N-methylacetamide (a Julia-Kocienski olefination reagent) and 2-(benzo[d]thiazol-2-ylthio)acetaldehyde (a bifunctional building block). This condensation was highly Z-selective and proceeded in a good 76% yield. Oxidation of benzothiazolylsulfanyl moiety furnished a second-generation Julia-Kocienski olefination reagent, which was used for the introduction of the second olefinic linkage via DBU-mediated condensations with aldehydes, to give (2Z,4E/Z)-dienamides in 50%–74% yield. Although olefinations were 4Z-selective, (2Z,4E/Z)-2-fluoro-2,4-dienamides could be readily isomerized to the corresponding 5-substituted (2Z,4E)-2-fluoro-N-methoxy-N-methylpenta-2,4-dienamides in the presence of catalytic iodine.
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Cao CR, Ou S, Jiang M, Liu JT. A practical route for the highly stereoselective synthesis of tetrasubstituted fluoroalkenes. Org Biomol Chem 2013; 12:467-73. [PMID: 24270666 DOI: 10.1039/c3ob42093k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of tetrasubstituted fluoroalkene derivatives were synthesized by the reaction of α-fluoro-β-carbonyl benzothiazol-2-yl sulfones with various nucleophiles in good yields with high stereoselectivities. The predominant cis configuration of fluorine and alkynyl groups was observed. A single isomer was obtained when a ketone, acetate or amide was used as the substrate in the presence of a base.
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Affiliation(s)
- Chun-Ru Cao
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Science, 345 Lingling Road, Shanghai 200032, China.
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Larnaud F, Malassis J, Pfund E, Linclau B, Lequeux T. Ready Synthetic Access to Enantiopure Allylic α(F)-Branched Fluoroalkenes. Org Lett 2013; 15:2450-3. [DOI: 10.1021/ol400917j] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Florent Larnaud
- Laboratoire de Chimie Moleculaire et Thioorganique, UMR CNRS 6507 & FR3038, ENSICAEN, Universite de Caen Basse-Normandie, 6 Boulevard du Marechal Juin, 14050 Caen, France, and Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Julien Malassis
- Laboratoire de Chimie Moleculaire et Thioorganique, UMR CNRS 6507 & FR3038, ENSICAEN, Universite de Caen Basse-Normandie, 6 Boulevard du Marechal Juin, 14050 Caen, France, and Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Emmanuel Pfund
- Laboratoire de Chimie Moleculaire et Thioorganique, UMR CNRS 6507 & FR3038, ENSICAEN, Universite de Caen Basse-Normandie, 6 Boulevard du Marechal Juin, 14050 Caen, France, and Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Bruno Linclau
- Laboratoire de Chimie Moleculaire et Thioorganique, UMR CNRS 6507 & FR3038, ENSICAEN, Universite de Caen Basse-Normandie, 6 Boulevard du Marechal Juin, 14050 Caen, France, and Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Thierry Lequeux
- Laboratoire de Chimie Moleculaire et Thioorganique, UMR CNRS 6507 & FR3038, ENSICAEN, Universite de Caen Basse-Normandie, 6 Boulevard du Marechal Juin, 14050 Caen, France, and Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
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Habib S, Larnaud F, Pfund E, Lequeux T, Fenet B, Goekjian PG, Gueyrard D. Synthesis of Fluorinatedexo-Glycals through Modified Julia Olefination. European J Org Chem 2013. [DOI: 10.1002/ejoc.201201719] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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22
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An Improved Protocol for the Aldehyde Olefination Reaction Using (bmim) () as Reaction Medium. J CHEM-NY 2013. [DOI: 10.1155/2013/439673] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
[Ru(COD)Cl2]/CuCl2·2H2O/LiCl catalytic system works efficiently in ionic liquid media for aldehyde olefination reaction. It offers good yield and selectivity with the added advantage of 5 times recyclability for [Ru(COD)Cl2] /CuCl2·2H2O/LiCl catalytic system. We also successfully reduced the reaction time from 12 hours to 9 hours for the aldehyde olefination reaction.
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Abstract
Metalation-electrophilic fluorination of TMS- and TIPS-protected 1,3-benzothiazol-2-yl (BT) propargyl sulfones gave corresponding BT fluoropropargyl sulfones, Julia-Kocienski reagents for the synthesis of fluoro enynes. Both reagents reacted with aldehydes under mild DBU- or LHMDS-mediated conditions, giving high yields of conjugated fluoro enynes with E-stereoselectivity. In comparison to DBU-mediated reactions, stereoselectivity was higher in low-temperature LHMDS-mediated reactions. Two ketones were shown to react as well, using LHMDS as base. In situ removal of the TMS group gave terminal conjugated 2-fluoro 1,3-enynes. Synthetic utility of the fluoro enynes was demonstrated by conversion to internal alkynes and to stereoisomeric fluoro dienes via Sonogashira and Heck couplings.
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Affiliation(s)
- Rakesh Kumar
- Department of Chemistry, The City College and The City University of New York, 160 Convent Avenue, New York, NY 10031
| | - Barbara Zajc
- Department of Chemistry, The City College and The City University of New York, 160 Convent Avenue, New York, NY 10031
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Abstract
A mild and efficient synthesis of 1-aryl-1-fluoroethenes from benzothiazolyl (aryl)fluoromethyl sulfones and paraformaldehyde, under DBU- or Cs(2)CO(3)-mediated conditions at room temperature, is described. A comparable diethyl fluoro(naphthalen-2-yl)methylphosphonate reagent does not react with paraformaldehyde under these mild conditions. The utility of the methodology for synthesis of terminal α-fluoroalkenes bearing electron-withdrawing functionalities is also shown.
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Affiliation(s)
- Samir K. Mandal
- Department of Chemistry, The City College and The City University of New York, New York, New York 10031-9198, U.S.A
| | - Arun K. Ghosh
- Department of Chemistry, The City College and The City University of New York, New York, New York 10031-9198, U.S.A
| | - Rakesh Kumar
- Department of Chemistry, The City College and The City University of New York, New York, New York 10031-9198, U.S.A
| | - Barbara Zajc
- Department of Chemistry, The City College and The City University of New York, New York, New York 10031-9198, U.S.A
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25
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Larnaud F, Pfund E, Linclau B, Lequeux T. Decarboxylation of fluorosulfones for the preparation fluoroalkylidene precursors. J Fluor Chem 2012. [DOI: 10.1016/j.jfluchem.2011.03.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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26
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Affiliation(s)
- Hikaru Yanai
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432‐1 Horinouchi, Hachioji, Tokyo 192‐0392, Japan, Fax: +81‐42‐676‐3257
| | - Takeo Taguchi
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432‐1 Horinouchi, Hachioji, Tokyo 192‐0392, Japan, Fax: +81‐42‐676‐3257
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Jacobsen CB, Nielsen M, Worgull D, Zweifel T, Fisker E, Jørgensen KA. Asymmetric organocatalytic monofluorovinylations. J Am Chem Soc 2011; 133:7398-404. [PMID: 21513324 DOI: 10.1021/ja110624k] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The development of highly enantio- and diastereoselective organocatalytic monofluorovinylations is presented. Based on the application of α-fluoro-β-keto-benzothiazolesulfones, the formal addition of a monofluorovinylic anion synthon to a range of acyclic and cyclic enones, as well as imines, is shown. These procedures give selective access to both E- and Z-isomers of the monofluorovinylated products, which are isolated as the pure diastereoisomers in good to excellent yields with up to 99% ee. Furthermore, the application of this concept for the formation of highly enantioenriched bicylic compounds containing a monofluorovinyl moiety is also described. In addition, a mechanistic rationale for the observed E:Z-selectivities is presented.
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Affiliation(s)
- Christian Borch Jacobsen
- Center for Catalysis, Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark
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28
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Kumar R, Pradhan P, Zajc B. Facile synthesis of 4-vinyl- and 4-fluorovinyl-1,2,3-triazoles via bifunctional "click-olefination" reagents. Chem Commun (Camb) 2011; 47:3891-3. [PMID: 21336351 DOI: 10.1039/c0cc05083k] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Modular synthesis of vinyl and fluorovinyl triazoles can be achieved from bifunctional propargyl and fluoropropargyl sulfones by Cu-catalyzed azide-alkyne ligation and Julia-Kocienski olefination. Competitive click reactions of the protio and fluoropropargyl sulfones show higher reactivity of the latter, and a preliminary DFT analysis was performed.
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Affiliation(s)
- Rakesh Kumar
- Department of Chemistry, The City College and The City University of New York, New York, New York 10031-9198, USA
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Landelle G, Bergeron M, Turcotte-Savard MO, Paquin JF. Synthetic approaches to monofluoroalkenes. Chem Soc Rev 2011; 40:2867-908. [DOI: 10.1039/c0cs00201a] [Citation(s) in RCA: 243] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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31
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Wang J, Guo X, Li CJ. Iridium as a general catalyst for the decarbonylative addition of aldehydes to alkynes. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2010.08.051] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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32
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Zhu L, Ni C, Zhao Y, Hu J. 1-tert-Butyl-1H-tetrazol-5-yl fluoromethyl sulfone (TBTSO2CH2F): a versatile fluoromethylidene synthon and its use in the synthesis of monofluorinated alkenes via Julia–Kocienski olefination. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.04.113] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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33
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Loghmani-Khouzani H, Hajiheidari D. Synthesis of difluorinated β-ketosulfones and novel gem-difluoromethylsulfone-containing heterocycles as fluorinated building blocks. J Fluor Chem 2010. [DOI: 10.1016/j.jfluchem.2009.12.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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34
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Efficient alkene synthesis on solid support using the Julia–Kocienski coupling. Mol Divers 2010; 14:847-53. [DOI: 10.1007/s11030-010-9251-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2010] [Accepted: 03/29/2010] [Indexed: 01/23/2023]
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35
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Guo X, Wang J, Li CJ. An olefination via ruthenium-catalyzed decarbonylative addition of aldehydes to terminal alkynes. J Am Chem Soc 2010; 131:15092-3. [PMID: 19919154 DOI: 10.1021/ja906265a] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A ruthenium-catalyzed olefination via decarbonylative addition of aldehydes and alkynes has been developed. A strong electronic effect and high chemoselectivity between aromatic and aliphatic aldehydes were observed in this reaction.
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Affiliation(s)
- Xiangyu Guo
- Department of Chemistry, McGill University, Montreal, QC, Canada H3A 2K6
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36
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Ghosh AK, Zajc B. Fluorinated 1-phenyl-1H-tetrazol-5-yl sulfone derivatives as general reagents for fluoroalkylidene synthesis. J Org Chem 2009; 74:8531-40. [PMID: 19831343 PMCID: PMC3045538 DOI: 10.1021/jo901313k] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Julia-Kocienski olefination reagents 1-fluoropropyl, (cyclopropyl)fluoromethyl, 1-fluoro-2-methyl-2-propenyl, and 1-fluoro-5-hexenyl 1-phenyl-1H-tetrazol-5-yl (PT) sulfones were prepared by metalation followed by electrophilic fluorination. Although metalation-fluorination of n-propyl, 5-hexenyl, and (cyclopropyl)methyl PT-sulfones proceeded under homogeneous conditions, fluorination of 2-methyl-2-propenyl PT-sulfone required heterogeneous fluorination conditions. Condensation reactions of fluoro PT-sulfones with aldehydes resulted in fluoroalkylidenes in high yields. Screening of olefination conditions showed that stereoselectivity depended on reagent and carbonyl structure and can in many cases be tuned either toward E- or Z-selectivity. For example, LHMDS-mediated condensations of 1-fluoropropyl PT-sulfone in the presence of MgBr(2) x OEt(2) were Z-selective with electron-rich aromatic aldehydes, a hindered aromatic aldehyde, and cinnamaldehyde. Low-temperature KHMDS-mediated condensations were E-selective with electron-rich and electron-deficient aromatic aldehydes and Z-selective with n-octanal. Dialkyl, aryl alkyl, and diaryl ketones reacted as well to give fluoro olefin products in 71-99% yields.
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Affiliation(s)
- Arun K. Ghosh
- Department of Chemistry, The City College and The City University of New York, 160 Convent Avenue, New York, NY 10031
| | - Barbara Zajc
- Department of Chemistry, The City College and The City University of New York, 160 Convent Avenue, New York, NY 10031
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37
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Calata C, Pfund E, Lequeux T. Toward the Synthesis of Benzothiazolyl Fluoroaminosulfones. J Org Chem 2009; 74:9399-405. [DOI: 10.1021/jo901540c] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Charlène Calata
- Laboratoire de Chimie Moléculaire et Thioorganique, UMR CNRS 6507 & FR3038, ENSICAEN Université de Caen Basse-Normandie, 6 Bd du Maréchal Juin 14050 Caen Cedex, France
| | - Emmanuel Pfund
- Laboratoire de Chimie Moléculaire et Thioorganique, UMR CNRS 6507 & FR3038, ENSICAEN Université de Caen Basse-Normandie, 6 Bd du Maréchal Juin 14050 Caen Cedex, France
| | - Thierry Lequeux
- Laboratoire de Chimie Moléculaire et Thioorganique, UMR CNRS 6507 & FR3038, ENSICAEN Université de Caen Basse-Normandie, 6 Bd du Maréchal Juin 14050 Caen Cedex, France
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