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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3
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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] [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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4
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Erdeljac N, Mück‐Lichtenfeld C, Daniliuc CG, Gilmour R. Conformational Analysis of Acyclic α-Fluoro Sulfur Motifs. Chemistry 2020; 26:13704-13715. [PMID: 32735052 PMCID: PMC7702044 DOI: 10.1002/chem.202003361] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 07/29/2020] [Indexed: 12/04/2022]
Abstract
Bioactive small molecules containing α-fluoro sulfur motifs [RS(O)n CH2 F] are appearing with increasing frequency in the pharmaceutical and agrochemical sectors. Prominent examples include the anti-asthma drug Flovent® and the phenylpyrazole insecticide pyrafluprole. Given the popularity of these structural units in bioactive small molecule design, together with the varying oxidation states of sulfur, a conformational analysis of α-fluoro sulfides, sulfoxides, and sulfones, would be instructive in order to delineate the non-covalent interactions that manifest themselves in structure. A combined crystallographic and computational analysis demonstrates the importance of hyperconjugative donor-acceptor interactions in achieving acyclic conformational control. The conformational disparity in the syn- and anti-diastereoisomers of α-fluorosulfoxides is particularly noteworthy.
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Affiliation(s)
- Nathalie Erdeljac
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität MünsterCorrensstraße 3648149MünsterGermany
| | - Christian Mück‐Lichtenfeld
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität MünsterCorrensstraße 3648149MünsterGermany
| | - Constantin G. Daniliuc
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität MünsterCorrensstraße 3648149MünsterGermany
| | - Ryan Gilmour
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität MünsterCorrensstraße 3648149MünsterGermany
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5
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Upare AA, Gadekar PK, Jadhav K, Sivaramakrishnan H, Roopan SM. Chlorotrifluoroethylidenes: an efficient and convenient approach to their synthesis. RSC Adv 2020; 10:17427-17431. [PMID: 35515602 PMCID: PMC9053503 DOI: 10.1039/d0ra02481c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 04/15/2020] [Indexed: 11/26/2022] Open
Abstract
A convenient one step synthesis of chlorotrifluoroalkyl olefins starting from aldehydes was developed. The stable reagent 2-((1-chloro-2,2,2-trifluoroethyl)sulfonyl)benzothiazole was prepared from readily available benzothiazole-2-thiol and halothane. This method comprises using stable 2-((1-chloro-2,2,2-trifluoroethyl)sulfonyl)benzothiazole according to the Julia procedure and presents new opportunities for the synthesis of trifluoroalkylidene derivatives. A convenient one step synthesis of chlorotrifluoroalkyl olefins starting from aldehydes was developed.![]()
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Affiliation(s)
- Abhay Atmaram Upare
- Chemistry of Heterocycles and Natural Product Research Lab
- Department of Chemistry
- School of Advanced Science
- Vellore Institute of Technology
- Vellore – 632014
| | - Pradip K. Gadekar
- Department of Process Development
- Piramal Enterprises Ltd
- Mumbai 400072
- India
| | - Kiran Jadhav
- Department of Process Development
- Piramal Enterprises Ltd
- Mumbai 400072
- India
| | | | - Selvaraj Mohana Roopan
- Chemistry of Heterocycles and Natural Product Research Lab
- Department of Chemistry
- School of Advanced Science
- Vellore Institute of Technology
- Vellore – 632014
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6
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Li C, Cao YX, Jin RX, Bian KJ, Qin ZY, Lan Q, Wang XS. Highly stereoselective nickel-catalyzed difluoroalkylation of aryl ketones to tetrasubstituted monofluoroalkenes and quaternary alkyl difluorides. Chem Sci 2019; 10:9285-9291. [PMID: 32055314 PMCID: PMC7003883 DOI: 10.1039/c9sc02806d] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 08/17/2019] [Indexed: 12/19/2022] Open
Abstract
A nickel-catalyzed difluoroalkylation of α-C-H bonds of aryl ketones to furnish highly stereo-defined tetrasubstituted monofluoroalkenes or quaternary alkyl difluorides from secondary or tertiary ketones, respectively, has been established. Mechanistic investigations indicated that these C-H fluoroalkylations proceed via a Ni(i)/Ni(iii) catalytic cycle. An obvious fluorine effect was observed in the reaction, and this reaction has demonstrated high stereoselectivity, mild conditions, and broad substrate scopes, thus enabling the late-stage fluoroalkylation of bioactive molecules. This method offers a solution for expedient construction of monofluoroalkenes from readily available materials, and provides an efficient approach for the synthesis of bioactive fluorinated compounds for the discovery of lead compounds in medicinal chemistry.
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Affiliation(s)
- Chao Li
- Hefei National Laboratory for Physical Sciences at the Microscale , Department of Chemistry , Center for Excellence in Molecular Synthesis of CAS , University of Science and Technology of China , Hefei , Anhui 230026 , China .
| | - Yi-Xuan Cao
- Hefei National Laboratory for Physical Sciences at the Microscale , Department of Chemistry , Center for Excellence in Molecular Synthesis of CAS , University of Science and Technology of China , Hefei , Anhui 230026 , China .
| | - Ruo-Xing Jin
- Hefei National Laboratory for Physical Sciences at the Microscale , Department of Chemistry , Center for Excellence in Molecular Synthesis of CAS , University of Science and Technology of China , Hefei , Anhui 230026 , China .
| | - Kang-Jie Bian
- Hefei National Laboratory for Physical Sciences at the Microscale , Department of Chemistry , Center for Excellence in Molecular Synthesis of CAS , University of Science and Technology of China , Hefei , Anhui 230026 , China .
| | - Zi-Yang Qin
- Hefei National Laboratory for Physical Sciences at the Microscale , Department of Chemistry , Center for Excellence in Molecular Synthesis of CAS , University of Science and Technology of China , Hefei , Anhui 230026 , China .
| | - Quan Lan
- Hefei National Laboratory for Physical Sciences at the Microscale , Department of Chemistry , Center for Excellence in Molecular Synthesis of CAS , University of Science and Technology of China , Hefei , Anhui 230026 , China .
| | - Xi-Sheng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale , Department of Chemistry , Center for Excellence in Molecular Synthesis of CAS , University of Science and Technology of China , Hefei , Anhui 230026 , China .
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Thierry T, Lebargy C, Pfund E, Lequeux T. Photoinduced Nonstabilized Azomethine Ylide Formation for the Preparation of Fluorine Containing Pyrrolidines. J Org Chem 2019; 84:5877-5885. [DOI: 10.1021/acs.joc.9b00244] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Thibault Thierry
- Laboratoire de Chimie Moléculaire et Thioorganique UMR 6507, ENSICAEN, UNICAEN, CNRS, Normandie Université, 6 Bd. du Maréchal Juin, 14050 Caen, France
| | - Cyril Lebargy
- Laboratoire de Chimie Moléculaire et Thioorganique UMR 6507, ENSICAEN, UNICAEN, CNRS, Normandie Université, 6 Bd. du Maréchal Juin, 14050 Caen, France
| | - Emmanuel Pfund
- Laboratoire de Chimie Moléculaire et Thioorganique UMR 6507, ENSICAEN, UNICAEN, CNRS, Normandie Université, 6 Bd. du Maréchal Juin, 14050 Caen, France
| | - Thierry Lequeux
- Laboratoire de Chimie Moléculaire et Thioorganique UMR 6507, ENSICAEN, UNICAEN, CNRS, Normandie Université, 6 Bd. du Maréchal Juin, 14050 Caen, France
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8
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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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9
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Wu YB, Lu GP, Yuan T, Xu ZB, Wan L, Cai C. Oxidative trifluoromethylation and fluoroolefination of unactivated olefins. Chem Commun (Camb) 2016; 52:13668-13670. [DOI: 10.1039/c6cc08178a] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fluorine-containing organic compounds are gaining increasing importance in medicinal chemistry.
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Affiliation(s)
- Ye-bin Wu
- Chemical Engineering College
- Nanjing University of Science and Technology
- Nanjing
- People's Republic of China
| | - Guo-ping Lu
- Chemical Engineering College
- Nanjing University of Science and Technology
- Nanjing
- People's Republic of China
| | - Tao Yuan
- Chemical Engineering College
- Nanjing University of Science and Technology
- Nanjing
- People's Republic of China
| | - Zhu-bing Xu
- Chemical Engineering College
- Nanjing University of Science and Technology
- Nanjing
- People's Republic of China
| | - Li Wan
- Biotechnology and Pharmaceutical Engineering College
- Nanjing Tech University
- Nanjing 211816
- People's Republic of China
| | - Chun Cai
- Chemical Engineering College
- Nanjing University of Science and Technology
- Nanjing
- People's Republic of China
- Key Laboratory of Organofluorine Chemistry
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11
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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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12
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Okoromoba O, Han J, Hammond GB, Xu B. Designer HF-based fluorination reagent: highly regioselective synthesis of fluoroalkenes and gem-difluoromethylene compounds from alkynes. J Am Chem Soc 2014; 136:14381-4. [PMID: 25260170 PMCID: PMC4210154 DOI: 10.1021/ja508369z] [Citation(s) in RCA: 144] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Indexed: 01/19/2023]
Abstract
Hydrogen fluoride (HF) and selected nonbasic and weakly coordinating (toward cationic metal) hydrogen-bond acceptors (e.g., DMPU) can form stable complexes through hydrogen bonding. The DMPU/HF complex is a new nucleophilic fluorination reagent that has high acidity and is compatible with cationic metal catalysts. The gold-catalyzed mono- and dihydrofluorination of alkynes using the DMPU/HF complex yields synthetically important fluoroalkenes and gem-difluoromethlylene compounds regioselectively.
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Affiliation(s)
- Otome
E. Okoromoba
- Department of Chemistry, University of
Louisville, Louisville, Kentucky 40292, United
States
| | - Junbin Han
- Department of Chemistry, University of
Louisville, Louisville, Kentucky 40292, United
States
| | - Gerald B. Hammond
- Department of Chemistry, University of
Louisville, Louisville, Kentucky 40292, United
States
| | - Bo Xu
- Department of Chemistry, University of
Louisville, Louisville, Kentucky 40292, United
States
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13
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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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14
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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: 918] [Impact Index Per Article: 91.8] [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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15
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Gao B, Zhao Y, Hu M, Ni C, Hu J. gem
‐Difluoroolefination of Diaryl Ketones and Enolizable Aldehydes with Difluoromethyl 2‐Pyridyl Sulfone: New Insights into the Julia–Kocienski Reaction. Chemistry 2014; 20:7803-10. [DOI: 10.1002/chem.201402183] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 03/10/2014] [Indexed: 11/05/2022]
Affiliation(s)
- Bing Gao
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling‐Ling Road, Shanghai 200032 (P.R. China), Fax: (+86) 21‐6416‐6128
| | - Yanchuan Zhao
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling‐Ling Road, Shanghai 200032 (P.R. China), Fax: (+86) 21‐6416‐6128
| | - Mingyou Hu
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling‐Ling Road, Shanghai 200032 (P.R. China), Fax: (+86) 21‐6416‐6128
| | - Chuanfa Ni
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling‐Ling Road, Shanghai 200032 (P.R. China), Fax: (+86) 21‐6416‐6128
| | - Jinbo Hu
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling‐Ling Road, Shanghai 200032 (P.R. China), Fax: (+86) 21‐6416‐6128
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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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Xiong Y, Zhang X, Huang T, Cao S. Synthesis of N-(α-fluorovinyl)azoles by the reaction of difluoroalkenes with azoles. J Org Chem 2014; 79:6395-402. [PMID: 24702255 DOI: 10.1021/jo5005845] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A mild and versatile method for the construction of C-N bonds by the reaction of (2,2-difluorovinyl)arenes with various N-H-containing heterocycles in the presence of K3PO4 has been developed. The reaction proceeded efficiently at room temperature (25 °C) affording the (E)-N-α-fluorovinyl derivatives of azoles 3 in good to excellent yields with relatively high stereoselectivity.
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Affiliation(s)
- Yang Xiong
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology , Shanghai 200237, China
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18
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David E, Couve-Bonnaire S, Jubault P, Pannecoucke X. Ethyl dibromofluoroacetate: a versatile reagent for the synthesis of fluorinated molecules. Tetrahedron 2013; 69:11039-11055. [PMID: 32287427 PMCID: PMC7126840 DOI: 10.1016/j.tet.2013.10.048] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2013] [Indexed: 02/01/2023]
Affiliation(s)
- Emilie David
- INSA de Rouen and Université de Rouen, CNRS, UMR 6014 & FR 3038, COBRA, IRCOF, 1 rue Tesnière, 76821 Mont-Saint-Aignan Cedex, France
| | - Samuel Couve-Bonnaire
- INSA de Rouen and Université de Rouen, CNRS, UMR 6014 & FR 3038, COBRA, IRCOF, 1 rue Tesnière, 76821 Mont-Saint-Aignan Cedex, France
| | - Philippe Jubault
- INSA de Rouen and Université de Rouen, CNRS, UMR 6014 & FR 3038, COBRA, IRCOF, 1 rue Tesnière, 76821 Mont-Saint-Aignan Cedex, France
| | - Xavier Pannecoucke
- INSA de Rouen and Université de Rouen, CNRS, UMR 6014 & FR 3038, COBRA, IRCOF, 1 rue Tesnière, 76821 Mont-Saint-Aignan Cedex, France
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Yang MH, Matikonda SS, Altman RA. Preparation of Fluoroalkenes via the Shapiro Reaction: Direct Access to Fluorinated Peptidomimetics. Org Lett 2013; 15:3894-7. [DOI: 10.1021/ol401637n] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Ming-Hsiu Yang
- Department of Medicinal Chemistry, The University of Kansas, Lawrence, Kansas 66045, United States
| | - Siddharth S. Matikonda
- Department of Medicinal Chemistry, The University of Kansas, Lawrence, Kansas 66045, United States
| | - Ryan A. Altman
- Department of Medicinal Chemistry, The University of Kansas, Lawrence, Kansas 66045, United States
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20
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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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21
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Yang J, Yin W, Liu R, Chu C. Ti(Oi-Pr)4Mediated Olefination between Julia Reagent and Aldehydes under Mild Conditions: Facile Synthesis of Vinyl Sulfones. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201200466] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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22
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Abstract
Recent developments in the stereoselective synthesis of fluoroalkenes, which include hydrofluorination of alkyne, fluorination of alkenylmetal, condensation methods, dehydrofluorination of gem-difluoro compounds, and a cross-coupling reaction using fluorohaloalkenes or fluoroalkenylmetal, are described in this chapter.
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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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Shao YD, Wu XS, Tian SK. Stereoselective Olefination and Regiospecific Vicinal Difunctionalization of Imines with α-(Benzothiazol-2-ylsulfonyl) Carbonyl Compounds. European J Org Chem 2012. [DOI: 10.1002/ejoc.201101684] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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27
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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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28
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Notsu K, Zushi Y, Ota S, Kawasaki-Takasuka T, Yamazaki T. Synthetic Utilization of 2-Chloro-1,1,1,2-tetrafluoroethane. Chemistry 2011; 17:9200-8. [DOI: 10.1002/chem.201100900] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2011] [Indexed: 11/11/2022]
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29
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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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30
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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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Kumar A, Sharma S, Tripathi VD, Srivastava S. Synthesis of chalcones and flavanones using Julia–Kocienski olefination. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.09.089] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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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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Zhao Y, Huang W, Zhu L, Hu J. Difluoromethyl 2-Pyridyl Sulfone: A New gem-Difluoroolefination Reagent for Aldehydes and Ketones. Org Lett 2010; 12:1444-7. [DOI: 10.1021/ol100090r] [Citation(s) in RCA: 188] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yanchuan Zhao
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Weizhou Huang
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Lingui Zhu
- 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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34
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Abstract
The Julia-Kocienski olefination provides a versatile platform for the synthesis of fluorovinyl compounds. This review describes our efforts as well as those of others in the synthesis of various fluorinated aryl and heteroaryl sulfones and their utility as olefination reagents for the modular assembly of fluoroalkenes. Where data is available, the influence of the fluorine atom on the reactivity of the olefination reagents and the stereochemical outcome of the olefination are described.
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Affiliation(s)
- 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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35
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Zhang W, Huang W, Hu J. Highly Stereoselective Synthesis of Monofluoroalkenes from α-Fluorosulfoximines and Nitrones. Angew Chem Int Ed Engl 2009; 48:9858-61. [DOI: 10.1002/anie.200905077] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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36
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Zhang W, Huang W, Hu J. Highly Stereoselective Synthesis of Monofluoroalkenes from α-Fluorosulfoximines and Nitrones. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200905077] [Citation(s) in RCA: 31] [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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37
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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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38
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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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39
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Ghosh AK, Banerjee S, Sinha S, Kang SB, Zajc B. Alpha-fluorovinyl Weinreb amides and alpha-fluoroenones from a common fluorinated building block. J Org Chem 2009; 74:3689-97. [PMID: 19361189 DOI: 10.1021/jo802784w] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Synthesis and reactivity of N-methoxy-N-methyl-(1,3-benzothiazol-2-ylsulfonyl)fluoroacetamide, a building block for Julia olefination, is reported. This reagent undergoes condensation reactions with aldehydes and cyclic ketones to give alpha-fluorovinyl Weinreb amides. Olefination reactions proceed under mild, DBU-mediated conditions, or in the presence of NaH. DBU-mediated condensations proceed with either E- or Z-selectivity, depending upon reaction conditions, whereas NaH-mediated reactions are > or = 98% Z-stereoselective. Conversion of the Weinreb amide moiety in N-methoxy-N-methyl-(1,3-benzothiazol-2-ylsulfanyl)fluoroacetamide to ketones, followed by oxidation, resulted in another set of olefination reagents, namely (1,3-benzothiazol-2-ylsulfonyl)fluoromethyl phenyl and propyl ketones. In the presence of DBU, these compounds react with aldehydes tested to give alpha-fluoroenones with high Z-selectivity. The use of N-methoxy-N-methyl-(1,3-benzothiazol-2-ylsulfanyl)fluoroacetamide as a common fluorinated intermediate in the synthesis of alpha-fluorovinyl Weinreb amides and alpha-fluoroenones has been demonstrated. Application of the Weinreb amide to alpha-fluoro allyl amine synthesis is also shown.
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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, New York 10031, USA
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40
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Ni C, Zhang L, Hu J. Synthesis of fluorinated beta-ketosulfones and gem-disulfones by nucleophilic fluoroalkylation of esters and sulfinates with di- and monofluoromethyl sulfones. J Org Chem 2009; 74:3767-71. [PMID: 19374333 DOI: 10.1021/jo900320b] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient and practically useful method for the preparation of alpha-functionalized mono- and difluoro(phenylsulfonyl)methanes by using a nucleophilic fluoroalkylation methodology was developed. Alpha,alpha-difluoro-beta-ketosulfones, alpha-monofluoro-beta-ketosulfones, and alpha-fluoro disulfones were successfully prepared in excellent yields by nucleophilic fluoroalkylation of esters and sulfinates with PhSO(2)CF(2)H and PhSO(2)CH(2)F reagents.
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Affiliation(s)
- Chuanfa Ni
- 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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41
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Lemonnier G, Zoute L, Dupas G, Quirion JC, Jubault P. Diethylzinc-Mediated One-Step Stereoselective Synthesis of α-Fluoroacrylates from Aldehydes and Ketones. Two Different Pathways Depending on the Carbonyl Partner. J Org Chem 2009; 74:4124-31. [DOI: 10.1021/jo900422m] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- G. Lemonnier
- INSA de Rouen et Université de Rouen, CNRS UMR 6014 C.O.B.R.A & FR 3038, IRCOF, 1 rue Tesnière, 76821 Mont-Saint-Aignan Cedex, France
| | - L. Zoute
- INSA de Rouen et Université de Rouen, CNRS UMR 6014 C.O.B.R.A & FR 3038, IRCOF, 1 rue Tesnière, 76821 Mont-Saint-Aignan Cedex, France
| | - G. Dupas
- INSA de Rouen et Université de Rouen, CNRS UMR 6014 C.O.B.R.A & FR 3038, IRCOF, 1 rue Tesnière, 76821 Mont-Saint-Aignan Cedex, France
| | - J.-C. Quirion
- INSA de Rouen et Université de Rouen, CNRS UMR 6014 C.O.B.R.A & FR 3038, IRCOF, 1 rue Tesnière, 76821 Mont-Saint-Aignan Cedex, France
| | - P. Jubault
- INSA de Rouen et Université de Rouen, CNRS UMR 6014 C.O.B.R.A & FR 3038, IRCOF, 1 rue Tesnière, 76821 Mont-Saint-Aignan Cedex, France
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42
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Calata C, Catel JM, Pfund E, Lequeux T. Scope and limitations of the Julia–Kocienski reaction with fluorinated sulfonylesters. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.03.041] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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43
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Affiliation(s)
- Christophe Aïssa
- Department of Chemistry, University of Liverpool, Crown Street, L69 7ZD, Liverpool, England
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44
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Diastereocontrolled addition of organometallic reagents to S-chiral N-(tert-butanesulfinyl)-α-fluoroenimines. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2008.10.140] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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del Solar M, Ghosh AK, Zajc B. Fluoro-Julia olefination as a mild, high-yielding route to alpha-fluoro acrylonitriles. J Org Chem 2008; 73:8206-11. [PMID: 18841918 PMCID: PMC2771215 DOI: 10.1021/jo801235x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Synthesis of a novel, stable reagent (1,3-benzothiazol-2-ylsulfonyl)fluoroacetonitrile from readily synthesized ethyl alpha-(1,3-benzothiazol-2-ylsulfanyl)-alpha-fluoroacetate is reported. Aldehydes undergo condensations with (1,3-benzothiazol-2-ylsulfonyl)fluoroacetonitrile in the presence of DBU leading to alpha-fluoro acrylonitriles in high yields and with good Z-stereoselectivity. Lowering of reaction temperature increases the Z selectivity.
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Affiliation(s)
- Maria del Solar
- Department of Chemistry, The City College and The City University of New York, 160 Convent Avenue, New York, New York 10031-9198, USA
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46
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Michida M, Mukaiyama T. A Convenient Method for the Synthesis of (Z)-α-Fluoroacrylates: Lewis Base-catalyzed Carbonyl Fluoroolefination Using Fluoro(trimethylsilyl)ketene Ethyl Trimethylsilyl Acetal. CHEM LETT 2008. [DOI: 10.1246/cl.2008.890] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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47
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Alonso D, Fuensanta M, Gómez-Bengoa E, Nájera C. Highly Efficient and Stereoselective Julia-Kocienski Protocol for the Synthesis of α-Fluoro-α,β-unsaturated Esters and Weinreb Amides Employing 3,5-Bis(trifluoromethyl)phenyl (BTFP) Sulfones. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200800194] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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48
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Alonso DA, Fuensanta M, Gómez-Bengoa E, Nájera C. 3,5-Bis(trifluoromethyl)phenyl Sulfones for the Highly Stereoselective Julia–Kocienski Synthesis of α,β-Unsaturated Esters and Weinreb Amides. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800041] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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49
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He M, Ghosh AK, Zajc B. Julia Olefination as a General Route to Phenyl (alpha-Fluoro)vinyl Sulfones. Synlett 2008; 2008:999-1004. [PMID: 19888442 PMCID: PMC2771386 DOI: 10.1055/s-2008-1072513] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Mild and efficient synthesis of phenyl (alpha-fluoro)vinyl sulfones via condensation of aldehydes and a ketone with a novel benzothiazolyl based bis-sulfone reagent is reported and this proceeds with moderate to good Z-stereoselectivity.
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Affiliation(s)
| | | | - Barbara Zajc
- Department of Chemistry, The City College and The City University of New York, 160 Convent Avenue, New York, NY 10031, USA
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