1
|
Maity S, Szpilman AM. 2-Fluoroenones via an Umpolung Morita-Baylis-Hillman Reaction of Enones. Org Lett 2023; 25:1218-1222. [PMID: 36779928 PMCID: PMC9972470 DOI: 10.1021/acs.orglett.3c00313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
Several methods have been reported for the formation of 2-fluoroenones. However, all these methods involve laborious multiple-step sequences with resulting low overall yields. In this paper, we report the first formal enone-α-H to F substitution, leading to 2-fluoroenones in a single step from ubiquitous enones in 63-90% yield. The reaction is applicable to a wide range of aromatic and alkenyl enones and is carried out at room temperature using HF-pyridine complex as the fluoride source. Mechanistic investigations support that the reaction takes place through a rare umpolung Morita-Baylis-Hillman-type mechanism.
Collapse
|
2
|
Huang X, David E, Jubault P, Besset T, Couve-Bonnaire S. Organocatalyzed Sulfa-Michael Addition of Thiophenols on Trisubstituted α-Fluoroacrylates, a Straightforward Access to Chiral Fluorinated Compounds. J Org Chem 2020; 85:14055-14067. [PMID: 33054226 DOI: 10.1021/acs.joc.0c02081] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this manuscript, a simple and efficient sulfa-Michael addition reaction of aryl thiols to trisubstituted α-fluoro-α,β-unsaturated esters both in racemic and, for the first time, in enantioselective version is reported. The commercially available dimer of cinchona derivatives (DHQ)2PYR was used as a catalyst. This strategy showed a great tolerance for various substrates and substituents, providing fair to excellent yields, moderate to excellent diastereoselectivities (2:1 to >99:1), and low to good enantioselectivities (2 to 87%). The reaction has been applied to the synthesis of fluorinated analogues of diltiazem and tiazesim, both therapeutic agents.
Collapse
Affiliation(s)
- Xin Huang
- Normandie Université, COBRA, UMR 6014 et FR 3038, Université de Rouen, INSA Rouen, CNRS, 1 rue Tesnière, 76821 Mont Saint-Aignan Cedex, France
| | - Emilie David
- Normandie Université, COBRA, UMR 6014 et FR 3038, Université de Rouen, INSA Rouen, CNRS, 1 rue Tesnière, 76821 Mont Saint-Aignan Cedex, France
| | - Philippe Jubault
- Normandie Université, COBRA, UMR 6014 et FR 3038, Université de Rouen, INSA Rouen, CNRS, 1 rue Tesnière, 76821 Mont Saint-Aignan Cedex, France
| | - Tatiana Besset
- Normandie Université, COBRA, UMR 6014 et FR 3038, Université de Rouen, INSA Rouen, CNRS, 1 rue Tesnière, 76821 Mont Saint-Aignan Cedex, France
| | - Samuel Couve-Bonnaire
- Normandie Université, COBRA, UMR 6014 et FR 3038, Université de Rouen, INSA Rouen, CNRS, 1 rue Tesnière, 76821 Mont Saint-Aignan Cedex, France
| |
Collapse
|
3
|
Naruse A, Kitahara K, Iwasa S, Shibatomi K. Synthesis of α‐Fluoroenones by Elimination of α‐Chloro‐α‐fluoroketones. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900072] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Atsushi Naruse
- Department of Applied Chemistry and Life ScienceToyohashi University of Technology 1-1 Hibarigaoka, Tempaku-cho Toyohashi 441-8580 Japan
| | - Kazumasa Kitahara
- Department of Applied Chemistry and Life ScienceToyohashi University of Technology 1-1 Hibarigaoka, Tempaku-cho Toyohashi 441-8580 Japan
| | - Seiji Iwasa
- Department of Applied Chemistry and Life ScienceToyohashi University of Technology 1-1 Hibarigaoka, Tempaku-cho Toyohashi 441-8580 Japan
| | - Kazutaka Shibatomi
- Department of Applied Chemistry and Life ScienceToyohashi University of Technology 1-1 Hibarigaoka, Tempaku-cho Toyohashi 441-8580 Japan
| |
Collapse
|
4
|
Li Y, Liu J, Zhao S, Du X, Guo M, Zhao W, Tang X, Wang G. Copper-Catalyzed Fluoroolefination of Silyl Enol Ethers and Ketones toward the Synthesis of β-Fluoroenones. Org Lett 2018; 20:917-920. [DOI: 10.1021/acs.orglett.7b03700] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Yanlin Li
- Tianjin
Key Laboratory of Molecular Optoelectronic Science, Department of
Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Jing Liu
- Tianjin
Key Laboratory of Molecular Optoelectronic Science, Department of
Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Shuang Zhao
- Tianjin
Key Laboratory of Molecular Optoelectronic Science, Department of
Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Xuzhao Du
- Tianjin
Key Laboratory of Molecular Optoelectronic Science, Department of
Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Minjie Guo
- Institute
for Molecular Design and Synthesis, Health and Science Platform, Tianjin University, Tianjin 300072, P. R. China
| | - Wentao Zhao
- Tianjin
Key Laboratory of Molecular Optoelectronic Science, Department of
Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Xiangyang Tang
- Tianjin
Key Laboratory of Molecular Optoelectronic Science, Department of
Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Guangwei Wang
- Tianjin
Key Laboratory of Molecular Optoelectronic Science, Department of
Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| |
Collapse
|
5
|
Affiliation(s)
- Wu Li
- Leibniz Institute for Catalysis at the University of Rostock, Albert-Einstein-Straße 29a, 18059 Rostock, Germany
| | - Thomas Werner
- Leibniz Institute for Catalysis at the University of Rostock, Albert-Einstein-Straße 29a, 18059 Rostock, Germany
| |
Collapse
|