1
|
Kralova P, Žáková K, Pospíšilová L, Soural M. Synthesis of 2,3‐Disubstituted Quinoline‐4‐carbonitriles via Truce–Smiles Rearrangement of Phenacyl‐4‐nitrobenzenesulfonamides. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Petra Kralova
- Palacky University Olomouc: Univerzita Palackeho v Olomouci Organic chemistry CZECH REPUBLIC
| | - Kateřina Žáková
- Palacky University Olomouc: Univerzita Palackeho v Olomouci Organic chemistry CZECH REPUBLIC
| | - Lenka Pospíšilová
- Palacky University Olomouc: Univerzita Palackeho v Olomouci Organic chemistry CZECH REPUBLIC
| | - Miroslav Soural
- Palacky University Olomouc Organic Chemistry 17.listopadu 12 77146 Olomouc CZECH REPUBLIC
| |
Collapse
|
2
|
Abrams R, Clayden J. Photocatalytic Difunctionalization of Vinyl Ureas by Radical Addition Polar Truce–Smiles Rearrangement Cascades. Angew Chem Int Ed Engl 2020; 59:11600-11606. [DOI: 10.1002/anie.202003632] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Indexed: 02/03/2023]
Affiliation(s)
- Roman Abrams
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Jonathan Clayden
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| |
Collapse
|
3
|
Abrams R, Clayden J. Photocatalytic Difunctionalization of Vinyl Ureas by Radical Addition Polar Truce–Smiles Rearrangement Cascades. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003632] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Roman Abrams
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Jonathan Clayden
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| |
Collapse
|
4
|
Kurouchi H, Ohwada T. Synthesis of Medium-Ring-Sized Benzolactams by Using Strong Electrophiles and Quantitative Evaluation of Ring-Size Dependency of the Cyclization Reaction Rate. J Org Chem 2020; 85:876-901. [PMID: 31800245 DOI: 10.1021/acs.joc.9b02843] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Benzolactams with medium-sized rings were synthesized via the electrophilic aromatic substitution reaction of carbamoyl cations (R1R2N+═C═O) in good to high yields without dilution. These reactions were utilized to quantitatively examine the extent of retardation of medium-sized ring formation, compared to five- or six-membered ring formation. The order of reaction rates of formation of cyclic benzolactams is six- > five- > seven- > eight- > nine-membered ring at 25 °C. The present reaction provides a route to eight- and nine-membered benzolactams.
Collapse
Affiliation(s)
- Hiroaki Kurouchi
- Research Foundation Itsuu Laboratory , C1232, Kanagawa Science Park R&D Building, 3-2-1 Sakado , Takatsu-ku, Kawasaki , Kanagawa 213-0012 , Japan.,Graduate School of Pharmaceutical Sciences , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan
| | - Tomohiko Ohwada
- Graduate School of Pharmaceutical Sciences , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan
| |
Collapse
|
5
|
Johnson S, Kovács E, Greaney MF. Arylation and alkenylation of activated alkyl halides using sulfonamides. Chem Commun (Camb) 2020; 56:3222-3224. [DOI: 10.1039/d0cc00220h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A variety of quaternary aryl amino acid derivatives can be synthesised using tandem SN2/Smiles rearrangement chemistry involving aryl sulfonamides and α-chloro carbonyl compounds.
Collapse
Affiliation(s)
- Stuart Johnson
- School of Chemistry
- University of Manchester
- Manchester M13 9PL
- UK
| | - Ervin Kovács
- School of Chemistry
- University of Manchester
- Manchester M13 9PL
- UK
| | | |
Collapse
|
6
|
Abstract
Traceless solid-phase synthesis represents an ultimate sophisticated synthetic strategy on insoluble supports. Compounds synthesized on solid supports can be released without a trace of the linker that was used to tether the intermediates during the synthesis. Thus, the target products are composed only of the components (atoms, functional groups) inherent to the target core structure. A wide variety of synthetic strategies have been developed to prepare products in a traceless manner, and this review is dedicated to all aspects of traceless solid-phase organic synthesis. Importantly, the synthesis does not need to be carried out on a linker designed for traceless synthesis; most of the synthetic approaches described herein were developed using standard, commercially available linkers (originally devised for solid-phase peptide synthesis). The type of structure prepared in a traceless fashion is not restricted. The individual synthetic approaches are divided into eight sections, each devoted to a different methodology for traceless synthesis. Each section consists of a brief outline of the synthetic strategy followed by a description of individual reported syntheses.
Collapse
Affiliation(s)
- Naděžda Cankařová
- Department of Organic Chemistry, Faculty of Science , Palacky University , 17. Listopadu 12 , Olomouc , 771 46 , Czech Republic
| | - Eva Schütznerová
- Department of Organic Chemistry, Faculty of Science , Palacky University , 17. Listopadu 12 , Olomouc , 771 46 , Czech Republic
| | - Viktor Krchňák
- Department of Organic Chemistry, Faculty of Science , Palacky University , 17. Listopadu 12 , Olomouc , 771 46 , Czech Republic.,Department of Chemistry and Biochemistry , University of Notre Dame , 251 Nieuwland Science Center , Notre Dame , Indiana 46556 , United States
| |
Collapse
|
7
|
Gonçalves CR, Lemmerer M, Teskey CJ, Adler P, Kaiser D, Maryasin B, González L, Maulide N. Unified Approach to the Chemoselective α-Functionalization of Amides with Heteroatom Nucleophiles. J Am Chem Soc 2019; 141:18437-18443. [PMID: 31714077 PMCID: PMC6879173 DOI: 10.1021/jacs.9b06956] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
Functionalization
at the α-position of carbonyl compounds
has classically relied on enolate chemistry. As a result, the generation
of a new C–X bond, where X is more electronegative than carbon
requires an oxidation event. Herein we show that, by rendering the
α-position of amides electrophilic through a mild and chemoselective
umpolung transformation, a broad range of widely available oxygen,
nitrogen, sulfur, and halogen nucleophiles can be used to generate
α-functionalized amides. More than 60 examples are presented
to establish the generality of this process, and calculations of the
mechanistic aspects underline a fragmentation pathway that accounts
for the broadness of this methodology.
Collapse
Affiliation(s)
- Carlos R Gonçalves
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria
| | - Miran Lemmerer
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria
| | - Christopher J Teskey
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria
| | - Pauline Adler
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria
| | - Daniel Kaiser
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria
| | - Boris Maryasin
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria.,Institute of Theoretical Chemistry , University of Vienna , Währinger Strasse 17 , 1090 Vienna , Austria
| | - Leticia González
- Institute of Theoretical Chemistry , University of Vienna , Währinger Strasse 17 , 1090 Vienna , Austria
| | - Nuno Maulide
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria
| |
Collapse
|
8
|
Pospíšilová J, Krchňák V, Schütznerová E. Traceless Solid-Phase Synthesis of 1' H-Spiro[Pyrrolidine-3,2'-quinazolin]-2-ones and 1' H-Spiro[Piperidine-3,2'-quinazolin]-2-ones via Lactamization of 1,2-Dihydroquinazoline-2-carboxylates. ACS COMBINATORIAL SCIENCE 2019; 21:1-5. [PMID: 30485058 DOI: 10.1021/acscombsci.8b00145] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We present the solid-phase synthesis of 1,2-dihydroquinazoline-2-carboxylate derivatives with a quaternary carbon in position 2 and their subsequent cyclization in solution into compounds with unique 3D architectures and pharmacological relevance-spiroquinazolines, namely, 1' H-spiro[pyrrolidine-3,2'-quinazolin]-2-ones and 1' H-spiro[piperidine-3,2'-quinazolin]-2-ones. Acyclic precursors were prepared from commercially available building blocks: protected amino acids (2,4-diaminobutyric acid and ornithine), 2-nitrobenzensulfonyl chlorides and α-bromoacetophenones. The crucial step of the synthesis was a base-mediated tandem reaction including C-arylation followed by cyclization into indazole oxides, and the formation of a 5-membered heterocycle was accomplished by ring expansion into quinazolines. These derivatives were cyclized into spiro compounds in solution after cleavage from the resin.
Collapse
Affiliation(s)
- Jana Pospíšilová
- Department of Organic Chemistry, Faculty of Science, Palacký University, 17 listopadu 12, 771 46 Olomouc, Czech Republic
| | - Viktor Krchňák
- Department of Organic Chemistry, Faculty of Science, Palacký University, 17 listopadu 12, 771 46 Olomouc, Czech Republic
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Center, Notre Dame, Indiana 46556, United States
| | - Eva Schütznerová
- Department of Organic Chemistry, Faculty of Science, Palacký University, 17 listopadu 12, 771 46 Olomouc, Czech Republic
| |
Collapse
|
9
|
Holden CM, Greaney MF. Modern Aspects of the Smiles Rearrangement. Chemistry 2017; 23:8992-9008. [DOI: 10.1002/chem.201700353] [Citation(s) in RCA: 114] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 04/07/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Catherine M. Holden
- School of Chemistry; University of Manchester; Oxford Rd Manchester M13 9PL UK
| | - Michael F. Greaney
- School of Chemistry; University of Manchester; Oxford Rd Manchester M13 9PL UK
| |
Collapse
|
10
|
Králová P, Fülöpová V, Maloň M, Volná T, Popa I, Soural M. Stereoselective Polymer-Supported Synthesis of Morpholine- and Thiomorpholine-3-carboxylic Acid Derivatives. ACS COMBINATORIAL SCIENCE 2017; 19:173-180. [PMID: 28085245 DOI: 10.1021/acscombsci.6b00178] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Herein we report the polymer-supported synthesis of 3,4-dihydro-2H-1,4-oxazine-3-carboxylic acid derivatives using immobilized Fmoc-Ser(tBu)-OH and Fmoc-Thr(tBu)-OH as the starting materials. After the solid-phase-synthesis of N-alkyl-N-sulfonyl/acyl intermediates, the target dihydrooxazines were obtained using trifluoroacetic acid-mediated cleavage from the resin. This approach was also studied for the preparation of dihydrothiazines from immobilized Fmoc-Cys(Trt)-OH. Inclusion of triethylsilane in the cleavage cocktail resulted in the stereoselective formation of the corresponding morpholine/thiomorpholine-3-carboxylic acids. Stereochemical studies revealed the specific configuration of the newly formed stereocenter and also the formation of stable N-acylmorpholine rotamers.
Collapse
Affiliation(s)
- Petra Králová
- Department
of Organic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Veronika Fülöpová
- Institute
of Molecular and Translation Medicine, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 5, 779 00 Olomouc, Czech Republic
| | - Michal Maloň
- JEOL Resonance Inc., Musashino
3-1-2, Akishima, Tokyo 196-8558, Japan
| | - Tereza Volná
- Department
of Organic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Igor Popa
- Department
of Organic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Miroslav Soural
- Institute
of Molecular and Translation Medicine, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 5, 779 00 Olomouc, Czech Republic
| |
Collapse
|
11
|
Schütznerová E, Krchňák V. N-Oxide as an Intramolecular Oxidant in the Baeyer-Villiger Oxidation: Synthesis of 2-Alkyl-2H-indazol-3-yl Benzoates and 2-Alkyl-1,2-dihydro-3H-indazol-3-ones. J Org Chem 2016; 81:3585-96. [PMID: 27035416 DOI: 10.1021/acs.joc.6b00251] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this study, we describe the intramolecular Baeyer-Villiger oxidation of ketones to esters using N-oxide. 2-Nitro-N-alkyl-N-(2-oxo-2-phenylethyl)benzenesulfonamide compounds are known to undergo base-mediated C-arylation followed by N-N bond formation, producing unstable five-membered ring intermediates that spontaneously dehydrate to indazole oxides. We identified the reaction conditions under which the cyclic intermediate undergoes acid-mediated intramolecular Baeyer-Villiger oxidation of the ketone in which N-oxide serves as the intramolecular oxidizing agent. The solid-phase synthesis plays a critical role in the successful transformation, allowing rapid access to the unstable but Baeyer-Villiger oxidation-prone intermediate. This synthetic route provides practical access to 2-alkyl-2H-indazol-3-yl benzoates and 2-alkyl-1,2-dihydro-3H-indazol-3-ones, which are known privileged structures possessing remarkable diverse pharmacologically relevant activities.
Collapse
Affiliation(s)
- Eva Schütznerová
- Department of Organic Chemistry, Faculty of Science, Palacký University , 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Viktor Krchňák
- Department of Organic Chemistry, Faculty of Science, Palacký University , 17. listopadu 12, 771 46 Olomouc, Czech Republic.,Department of Chemistry and Biochemistry, 251 Nieuwland Science Center, University of Notre Dame , Notre Dame, Indiana 46556, United States
| |
Collapse
|
12
|
Carbain B, Schütznerová E, Přibylka A, Krchňák V. Solid-Phase Synthesis of 3,4-Dihydroquinoxalin-2(1H
)-ones via
the Cyclative Cleavage of N
-Arylated Carboxamides. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201500826] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
13
|
Fülöpová V, Soural M. Mining the Chemical Space: Application of 2/4-Nitrobenzenesulfonamides in Solid-Phase Synthesis. ACS COMBINATORIAL SCIENCE 2015; 17:570-91. [PMID: 26325251 DOI: 10.1021/acscombsci.5b00089] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Polymer-supported benzenesulfonamides prepared from various immobilized primary amines and 2/4-nitrobenzenesulfonyl chloride have been used as key intermediates in different chemical transformations, including unusual rearrangements to yield a number of diverse privileged scaffolds. This review summarizes individual strategies in their application to date.
Collapse
Affiliation(s)
- Veronika Fülöpová
- Department of Organic Chemistry,
Institute of Molecular and Translational Medicine, Faculty of Science, Palacky University, 17 listopadu 12, 771 46 Olomouc, Czech Republic
| | - Miroslav Soural
- Department of Organic Chemistry,
Institute of Molecular and Translational Medicine, Faculty of Science, Palacky University, 17 listopadu 12, 771 46 Olomouc, Czech Republic
| |
Collapse
|
14
|
Giménez-Navarro V, Volná T, Krchňák V. 3-Alkyl-3-(alkylamino)indolin-2-ones via Base-Mediated C-Arylation of 2-Nitrobenzenesulfonamides. ACS COMBINATORIAL SCIENCE 2015; 17:433-6. [PMID: 26181142 DOI: 10.1021/acscombsci.5b00068] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Resin-bound intermediates prepared from polymer-supported amino acid esters, 2-nitrobenezenesulfonyl chlorides, and alcohols were used to synthesize 3-alkyl-3-(alkylamino) indolin-2-ones. The key step of the reaction sequence was the formation of a quaternary carbon via the base-mediated C-arylation of 2-nitrobenzenesulfonamides. The cleavage of the acyclic precursors from the resin and subsequent reduction of the nitro group by Zn in acetic acid triggered the spontaneous cyclization of the arylated compounds to indolinones. The synthesis was carried out using simple commercially available building blocks under mild conditions and provided the 3,3-disubstituted indolinone derivatives with good overall yields however, the arylation reaction resulted in the epimerization of the quaternary carbon.
Collapse
Affiliation(s)
- Vanesa Giménez-Navarro
- Department
of Organic Chemistry, Institute of Molecular and Translational Medicine,
Faculty of Science, Palacky University, 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Tereza Volná
- Department
of Organic Chemistry, Institute of Molecular and Translational Medicine,
Faculty of Science, Palacky University, 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Viktor Krchňák
- Department
of Organic Chemistry, Institute of Molecular and Translational Medicine,
Faculty of Science, Palacky University, 17. listopadu 12, 771 46 Olomouc, Czech Republic
- Department
of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland
Science Center, Notre Dame, Indiana 46556, United States
| |
Collapse
|
15
|
Rasheed OK, Hardcastle IR, Raftery J, Quayle P. Aryne generation vs. Truce-Smiles and fries rearrangements during the Kobayashi fragmentation reaction: a new bi-aryl synthesis. Org Biomol Chem 2015; 13:8048-52. [DOI: 10.1039/c5ob01239b] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Treatment of (ortho-trimethysilyl)aryl phenylsulfonates with fluoride anion initiates a Truce-Smiles rearrangement leading to the formation of bi-aryls.
Collapse
Affiliation(s)
- O. K. Rasheed
- School of Chemistry
- University of Manchester
- Manchester M13 9PL
- UK
| | - I. R. Hardcastle
- School of Chemistry
- Newcastle University
- Newcastle upon Tyne NE1 7RU
- UK
| | - J. Raftery
- School of Chemistry
- University of Manchester
- Manchester M13 9PL
- UK
| | - P. Quayle
- School of Chemistry
- University of Manchester
- Manchester M13 9PL
- UK
| |
Collapse
|