1
|
Zhang Y, Raugh N, Koert U. Fluorotrifluoromethyl Group Installation: Tetrasubstituted Tertiary Stereocenters Containing C-F and C-CF 3 Bonds via Copper-Mediated Allylic Substitution. Org Lett 2023. [PMID: 37478001 DOI: 10.1021/acs.orglett.3c02032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/23/2023]
Abstract
Tetrasubstituted tertiary centers containing a fluorotrifluoromethyl (FTF) motif were obtained from secondary 3-fluoro-3-trifluoromethyl allylic phosphates by a copper(I)-mediated allylic substitution reaction using Grignard reagents. The reaction features a broad substrate scope, high γ-regioselectivity, and excellent (E)-stereoselectivity. Two examples of chirality transfer from enantiopure secondary fluorine-substituted allylic phosphates to the corresponding scalemic products indicate the stereoselective potential of the method to install FTF stereocenters.
Collapse
Affiliation(s)
- Yingling Zhang
- Department of Chemistry, Philipps University of Marburg, Hans-Meerwein-Straße 4, D-35043 Marburg, Germany
| | - Nils Raugh
- Department of Chemistry, Philipps University of Marburg, Hans-Meerwein-Straße 4, D-35043 Marburg, Germany
| | - Ulrich Koert
- Department of Chemistry, Philipps University of Marburg, Hans-Meerwein-Straße 4, D-35043 Marburg, Germany
| |
Collapse
|
2
|
Fernandes AJ, Michelet B, Panossian A, Martin-Mingot A, Leroux FR, Thibaudeau S. Exploring F/CF 3 substituted oxocarbenium ions for the diastereoselective assembly of highly substituted tetrahydrofurans. Chem Commun (Camb) 2023; 59:4083-4086. [PMID: 36938713 DOI: 10.1039/d2cc06521e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
Abstract
Understanding the influence of emerging fluorinated motifs is of a crucial importance in the context of the exponentially growing exploitation of fluorine in many fields. Herein, we report on the dramatic effect of a local partial charge inversion by replacing a CHCH3 group by a CFCF3. This strategy allows the diastereoselective reduction of 5-membered ring oxocarbenium ions to access highly substituted tetrahydrofurans.
Collapse
Affiliation(s)
- Anthony J Fernandes
- Université de Strasbourg, Université de Haute-Alsace, CNRS, UMR 7042-LIMA, ECPM, 25 Rue Becquerel, Strasbourg 67087, France.
| | - Bastien Michelet
- Université de Poitiers, CNRS, IC2MP, UMR 7285, Equipe "Synthèse Organique", 4 Rue Michel Brunet, Poitiers Cedex 9 86073, France.
| | - Armen Panossian
- Université de Strasbourg, Université de Haute-Alsace, CNRS, UMR 7042-LIMA, ECPM, 25 Rue Becquerel, Strasbourg 67087, France.
| | - Agnès Martin-Mingot
- Université de Poitiers, CNRS, IC2MP, UMR 7285, Equipe "Synthèse Organique", 4 Rue Michel Brunet, Poitiers Cedex 9 86073, France.
| | - Frédéric R Leroux
- Université de Strasbourg, Université de Haute-Alsace, CNRS, UMR 7042-LIMA, ECPM, 25 Rue Becquerel, Strasbourg 67087, France.
| | - Sébastien Thibaudeau
- Université de Poitiers, CNRS, IC2MP, UMR 7285, Equipe "Synthèse Organique", 4 Rue Michel Brunet, Poitiers Cedex 9 86073, France.
| |
Collapse
|
3
|
Commare B, Schmitt E, Aribi F, Panossian A, Vors JP, Pazenok S, Leroux FR. Fluoroalkyl Amino Reagents (FARs): A General Approach towards the Synthesis of Heterocyclic Compounds Bearing Emergent Fluorinated Substituents. Molecules 2017; 22:molecules22060977. [PMID: 28604633 PMCID: PMC6152730 DOI: 10.3390/molecules22060977] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Revised: 06/06/2017] [Accepted: 06/07/2017] [Indexed: 01/05/2023] Open
Abstract
Fluorinated heterocycles are important building blocks in pharmaceutical, agrochemical and material sciences. Therefore, organofluorine chemistry has witnessed high interest in the development of efficient methods for the introduction of emergent fluorinated substituents (EFS) onto heterocycles. In this context, fluoroalkyl amino reagents (FARs)—a class of chemicals that was slightly forgotten over the last decades—has emerged again recently and proved to be a powerful tool for the introduction of various fluorinated groups onto (hetero)aromatic derivatives.
Collapse
Affiliation(s)
- Bruno Commare
- University of Strasbourg, CNRS, LCM UMR 7509, 67000 Strasbourg, France.
| | - Etienne Schmitt
- University of Strasbourg, CNRS, LCM UMR 7509, 67000 Strasbourg, France.
| | - Fallia Aribi
- University of Strasbourg, CNRS, LCM UMR 7509, 67000 Strasbourg, France.
| | - Armen Panossian
- University of Strasbourg, CNRS, LCM UMR 7509, 67000 Strasbourg, France.
| | - Jean-Pierre Vors
- Bayer S.A.S., 14 Impasse Pierre Baizet, BP 99163, 69263 Lyon CEDEX 09, France.
| | - Sergiy Pazenok
- Bayer AG, Alfred-Nobel-Strasse 50, 40789 Monheim, Germany.
| | - Frédéric R Leroux
- University of Strasbourg, CNRS, LCM UMR 7509, 67000 Strasbourg, France.
| |
Collapse
|
4
|
Brewitz L, Arteaga FA, Yin L, Alagiri K, Kumagai N, Shibasaki M. Direct Catalytic Asymmetric Mannich-Type Reaction of α- and β-Fluorinated Amides. J Am Chem Soc 2015; 137:15929-39. [PMID: 26652911 DOI: 10.1021/jacs.5b11064] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The last two decades have witnessed the emergence of direct enolization protocols providing atom-economical and operationally simple methods to use enolates for stereoselective C-C bond-forming reactions, eliminating the inherent drawback of the preformation of enolates using stoichiometric amounts of reagents. In its infancy, direct enolization relied heavily on the intrinsic acidity of the latent enolates, and the reaction scope was limited to readily enolizable ketones and aldehydes. Recent advances in this field enabled the exploitation of carboxylic acid derivatives for direct enolization, offering expeditious access to synthetically versatile chiral building blocks. Despite the growing demand for enantioenriched fluorine-containing small molecules, α- and β-fluorinated carbonyl compounds have been neglected in direct enolization chemistry because of the competing and dominating defluorination pathway. Herein we present a comprehensive study on direct and highly stereoselective Mannich-type reactions of α- and β-fluorine-functionalized 7-azaindoline amides that rely on a soft Lewis acid/hard Brønsted base cooperative catalytic system to guarantee an efficient enolization while suppressing undesired defluorination. This protocol contributes to provide a series of fluorinated analogs of enantioenriched β-amino acids for medicinal chemistry.
Collapse
Affiliation(s)
| | | | - Liang Yin
- Institute of Microbial Chemistry (BIKAKEN) , Tokyo, Kamiosaki 3-14-23, Shinagawa-ku, Tokyo 141-0021, Japan
| | | | | | | |
Collapse
|
5
|
Bilska-Markowska M, Rapp M, Siodła T, Katrusiak A, Hoffmann M, Koroniak H. Tri- and tetrafluoropropionamides derived from chiral secondary amines – synthesis and the conformational studies. NEW J CHEM 2014. [DOI: 10.1039/c4nj00317a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The trifluoromethyl group placed in the α position to the CO group impacts the conformation around F–C–CO bond.
Collapse
Affiliation(s)
| | - Magdalena Rapp
- Faculty of Chemistry
- Adam Mickiewicz University in Poznań
- 61-614 Poznań, Poland
| | - Tomasz Siodła
- Faculty of Chemistry
- Adam Mickiewicz University in Poznań
- 61-614 Poznań, Poland
| | - Andrzej Katrusiak
- Faculty of Chemistry
- Adam Mickiewicz University in Poznań
- 61-614 Poznań, Poland
| | - Marcin Hoffmann
- Faculty of Chemistry
- Adam Mickiewicz University in Poznań
- 61-614 Poznań, Poland
| | - Henryk Koroniak
- Faculty of Chemistry
- Adam Mickiewicz University in Poznań
- 61-614 Poznań, Poland
| |
Collapse
|
6
|
Synthesis of α-trifluoromethylated amides by Eschenmoser–Claisen-type rearrangement of allylic alcohols. J Fluor Chem 2012. [DOI: 10.1016/j.jfluchem.2012.07.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|