1
|
Ryan MR, Lynch D, Collins SG, Maguire AR. Selective Thermal Deprotection of N-Boc Protected Amines in Continuous Flow. Org Process Res Dev 2024; 28:1946-1963. [PMID: 38783851 PMCID: PMC11110071 DOI: 10.1021/acs.oprd.3c00498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 03/06/2024] [Accepted: 03/28/2024] [Indexed: 05/25/2024]
Abstract
Thermal N-Boc deprotection of a range of amines is readily effected in continuous flow, in the absence of an acid catalyst. While the optimum results were obtained in methanol or trifluoroethanol, deprotection can be effected in a range of solvents of different polarities. Sequential selective deprotection of N-Boc groups has been demonstrated through temperature control, as exemplified by effective removal of an aryl N-Boc group in the presence of an alkyl N-Boc group. As a proof of principle, a telescoped sequence involving selective deprotection of an aryl N-Boc group from 9h followed by benzoylation and deprotection of the remaining alkyl N-Boc group to form amide 13 proved successful.
Collapse
Affiliation(s)
- Michelle-Rose Ryan
- School
of Chemistry, Analytical and Biological Chemistry Research Facility, University College Cork, Cork T12 YN60, Ireland
| | - Denis Lynch
- School
of Chemistry, Analytical and Biological Chemistry Research Facility, University College Cork, Cork T12 YN60, Ireland
| | - Stuart G. Collins
- School
of Chemistry, Analytical and Biological Chemistry Research Facility,
SSPC, The SFI Research Centre for Pharmaceuticals, University College Cork, Cork T12 YN60, Ireland
| | - Anita R. Maguire
- School
of Chemistry and School of Pharmacy, Analytical and Biological Chemistry
Research Facility, SSPC, The SFI Research Centre for Pharmaceuticals, University College Cork, Cork T12 YN60, Ireland
| |
Collapse
|
2
|
Synthesis of Sulfoximines and Sulfonimidamides Using Hypervalent Iodine Mediated NH Transfer. Molecules 2023; 28:molecules28031120. [PMID: 36770787 PMCID: PMC9920176 DOI: 10.3390/molecules28031120] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/03/2023] [Accepted: 01/12/2023] [Indexed: 01/24/2023] Open
Abstract
The development of NH transfer reactions using hypervalent iodine and simple sources of ammonia has facilitated the synthesis of sulfoximines and sulfonimidamides for applications across the chemical sciences. Perhaps most notably, the methods have been widely applied in medicinal chemistry and in the preparation of biologically active compounds, including in the large-scale preparation of an API intermediate. This review provides an overview of the development of these synthetic methods involving an intermediate iodonitrene since our initial report in 2016 on the conversion of sulfoxides into sulfoximines. This review covers the NH transfer to sulfoxides and sulfinamides, and the simultaneous NH/O transfer to sulfides and sulfenamides to form sulfoximines and sulfonimidamides, respectively. The mechanism of the reactions and the identification of key intermediates are discussed. Developments in the choice of reagents, and in the reaction conditions and setups used are described.
Collapse
|
3
|
Chen Y, Kollback J, Aurell C. An Improved Synthesis of 1λ
6
,2,4,6‐Thiatriazine‐1,3,5‐trione Derivatives – the Sulfonimidamide‐featured Triazinones. ChemistrySelect 2022. [DOI: 10.1002/slct.202201284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yantao Chen
- Medicinal Chemistry Research and Early Development, Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca Gothenburg Sweden
| | - Johanna Kollback
- Early Chemical Development, Pharmaceutical Sciences, BioPharmaceuticals R&D, AstraZeneca Gothenburg Sweden
| | - Carl‐Johan Aurell
- Early Chemical Development, Pharmaceutical Sciences, BioPharmaceuticals R&D, AstraZeneca Gothenburg Sweden
| |
Collapse
|
4
|
Thomas Passia M, Schöbel JH, Julian Lentelink N, Truong KN, Rissanen K, Bolm C. Synthesis of trifluoromethyl-substituted 1,2,6-thiadiazine 1-oxides from sulfonimidamides under mechanochemical conditions. Org Biomol Chem 2021; 19:9470-9475. [PMID: 34708226 DOI: 10.1039/d1ob01912k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
TBS-protected or NH-sulfonimidamides react with β-alkoxyvinyl trifluoromethylketones under solvent-free mechanochemical conditions to give 3-trifluoromethyl-substituted three-dimensional 1,2,6-thiadiazine 1-oxides. C4-Functionalized products can be obtained by starting from cyclic enones and brominations of the initially formed heterocycles. The stability of the products was investigated by varying the pH value and storage under aerobic conditions.
Collapse
Affiliation(s)
- Marco Thomas Passia
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany.
| | - Jan-Hendrik Schöbel
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany.
| | - Niklas Julian Lentelink
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany.
| | - Khai-Nghi Truong
- University of Jyvaskyla, Department of Chemistry, P.O. Box. 35, Survontie 9 B, 40014 Jyväskylä, Finland
| | - Kari Rissanen
- University of Jyvaskyla, Department of Chemistry, P.O. Box. 35, Survontie 9 B, 40014 Jyväskylä, Finland
| | - Carsten Bolm
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany.
| |
Collapse
|
5
|
Benediktsdottir A, Lu L, Cao S, Zamaratski E, Karlén A, Mowbray SL, Hughes D, Sandström A. Antibacterial sulfonimidamide-based oligopeptides as type I signal peptidase inhibitors: Synthesis and biological evaluation. Eur J Med Chem 2021; 224:113699. [PMID: 34352713 DOI: 10.1016/j.ejmech.2021.113699] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 06/18/2021] [Accepted: 07/10/2021] [Indexed: 10/20/2022]
Abstract
Oligopeptide boronates with a lipophilic tail are known to inhibit the type I signal peptidase in E. coli, which is a promising drug target for developing novel antibiotics. Antibacterial activity depends on these oligopeptides having a cationic modification to increase their permeation. Unfortunately, this modification is associated with cytotoxicity, motivating the need for novel approaches. The sulfonimidamide functionality has recently gained much interest in drug design and discovery, as a means of introducing chirality and an imine-handle, thus allowing for the incorporation of additional substituents. This in turn can tune the chemical and biological properties, which are here explored. We show that introducing the sulfonimidamide between the lipophilic tail and the peptide in a series of signal peptidase inhibitors resulted in antibacterial activity, while the sulfonamide isostere and previously known non-cationic analogs were inactive. Additionally, we show that replacing the sulfonamide with a sulfonimidamide resulted in decreased cytotoxicity, and similar results were seen by adding a cationic sidechain to the sulfonimidamide motif. This is the first report of incorporation of the sulfonimidamide functional group into bioactive peptides, more specifically into antibacterial oligopeptides, and evaluation of its biological effects.
Collapse
Affiliation(s)
- Andrea Benediktsdottir
- Department of Medicinal Chemistry, BMC, Uppsala University, Box 574, SE-75123, Uppsala, Sweden
| | - Lu Lu
- Department of Cell and Molecular Biology, BMC, Uppsala University, Box 596, SE-75123, Uppsala, Sweden
| | - Sha Cao
- Department of Medical Biochemistry and Microbiology, BMC, Box 582, SE-75123, Uppsala, Sweden
| | - Edouard Zamaratski
- Department of Medicinal Chemistry, BMC, Uppsala University, Box 574, SE-75123, Uppsala, Sweden
| | - Anders Karlén
- Department of Medicinal Chemistry, BMC, Uppsala University, Box 574, SE-75123, Uppsala, Sweden
| | - Sherry L Mowbray
- Department of Cell and Molecular Biology, BMC, Uppsala University, Box 596, SE-75123, Uppsala, Sweden; Uppsala University, Science for Life Laboratory, Department of Cell and Molecular Biology, Box 596, SE-751 24, Uppsala, Sweden
| | - Diarmaid Hughes
- Department of Medical Biochemistry and Microbiology, BMC, Box 582, SE-75123, Uppsala, Sweden
| | - Anja Sandström
- Department of Medicinal Chemistry, BMC, Uppsala University, Box 574, SE-75123, Uppsala, Sweden.
| |
Collapse
|
6
|
Krauskopf F, Truong KN, Rissanen K, Bolm C. 2,3-Dihydro-1,2,6-thiadiazine 1-Oxides by Biginelli-Type Reactions with Sulfonimidamides under Mechanochemical Conditions. Org Lett 2021; 23:2699-2703. [PMID: 33739844 DOI: 10.1021/acs.orglett.1c00596] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Biginelli-type multicomponent reactions (MCRs) with NH-free sulfonimidamides provide 2,3-dihydro-1,2,6-thiadiazine 1-oxides in high yields. The couplings are performed in a planetary ball mill under solvent-free mechanochemical conditions. Acetic acid or ytterbium triflate are used as catalysts. A representative product was characterized by X-ray single crystal structure analysis revealing molecular details of the highly functionalized three-dimensional heterocycle. Further product modifications lead to additional structural scaffolds.
Collapse
Affiliation(s)
- Felix Krauskopf
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Khai-Nghi Truong
- University of Jyvaskyla, Department of Chemistry, P.O. Box 35, Survontie 9B, FI-40014 Jyväskylä, Finland
| | - Kari Rissanen
- University of Jyvaskyla, Department of Chemistry, P.O. Box 35, Survontie 9B, FI-40014 Jyväskylä, Finland
| | - Carsten Bolm
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| |
Collapse
|
7
|
Schöbel JH, Liang W, Wöll D, Bolm C. Mechanochemical Synthesis of 1,2,6-Thiadiazine 1-Oxides from Sulfonimidamides and the Fluorescence Properties of the Products. J Org Chem 2020; 85:15760-15766. [PMID: 33225705 DOI: 10.1021/acs.joc.0c02599] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A solvent-free mechanochemical synthesis for 1,2,6-thiadiazine 1-oxides starting from NH-sulfonimidamides and propargyl ketones has been developed. Lewis acids affect these one-pot aza-Michael-addition/cyclization/dehydration reaction sequences. The photophysical properties of the resulting heterocyclic sulfonimidamide derivatives were characterized.
Collapse
Affiliation(s)
- Jan-Hendrik Schöbel
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Wenjing Liang
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, D-52074 Aachen, Germany
| | - Dominik Wöll
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, D-52074 Aachen, Germany
| | - Carsten Bolm
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| |
Collapse
|
8
|
Chen Y, Aurell CJ, Rae R. Oligomerization: An Inherent Property of Sulfonimidamides? European J Org Chem 2020. [DOI: 10.1002/ejoc.202000802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yantao Chen
- Medicinal Chemistry Department; Research and Early Development; AstraZeneca; Gothenburg Sweden
| | - Carl-Johan Aurell
- Early Chemical Development; Pharmaceutical Sciences; AstraZeneca; Gothenburg Sweden
| | - Rebecca Rae
- Medicinal Chemistry Department; Research and Early Development; Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D; AstraZeneca; Gothenburg Sweden
| |
Collapse
|
9
|
Wojaczyńska E, Wojaczyński J. Modern Stereoselective Synthesis of Chiral Sulfinyl Compounds. Chem Rev 2020; 120:4578-4611. [PMID: 32347719 PMCID: PMC7588045 DOI: 10.1021/acs.chemrev.0c00002] [Citation(s) in RCA: 107] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Indexed: 12/22/2022]
Abstract
Chiral sulfinyl compounds, sulfoxides, sulfoximines, sulfinamides, and other derivatives, play an important role in asymmetric synthesis as versatile auxiliaries, ligands, and catalysts. They are also recognized as pharmacophores found in already marketed and well-sold drugs (e.g., esomeprazole) and used in drug design. This review is devoted to the modern methods of preparation of sulfinyl derivatives in enantiopure or enantiomerically enriched form. Selected new approaches leading to racemic products for which the asymmetric variant can be developed in the future are mentioned as well.
Collapse
Affiliation(s)
- Elżbieta Wojaczyńska
- Faculty
of Chemistry, Wrocław University of
Science and Technology, Wybrzeże Wyspiańskiego
27, 50 370 Wrocław, Poland
| | - Jacek Wojaczyński
- Faculty
of Chemistry, University of Wrocław 14 F. Joliot-Curie St., 50 383 Wrocław, Poland
| |
Collapse
|
10
|
Synthesis of N-substituted sulfonamides containing perhalopyridine moiety as bio-active candidates. J Fluor Chem 2020. [DOI: 10.1016/j.jfluchem.2020.109507] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
11
|
Chinthakindi PK, Benediktsdottir A, Arvidsson PI, Chen Y, Sandström A. Solid Phase Synthesis of Sulfonimidamide Pseudopeptides and Library Generation. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000108] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Praveen K. Chinthakindi
- The Beijer Laboratory; Department of Medicinal Chemistry; Uppsala University; Box 574 75123 Uppsala Sweden
| | - Andrea Benediktsdottir
- The Beijer Laboratory; Department of Medicinal Chemistry; Uppsala University; Box 574 75123 Uppsala Sweden
| | - Per I. Arvidsson
- Science for Life Laboratory; Drug Discovery and Development Platform and Division of Translational Medicine and Chemical Biology; Karolinska Institutet; 17177 Stockholm Sweden
- Catalysis and Peptide Research Unit; Drug Discovery and Development Platform and Division of Translational Medicine and Chemical Biology; University of KwaZulu-Natal; 4000 Durban South Africa
| | - Yantao Chen
- Medicinal Chemistry; Research and Early Development, Cardiovascular, Renal and Metabolism; AstraZeneca; 43183 Gothenburg Sweden
| | - Anja Sandström
- The Beijer Laboratory; Department of Medicinal Chemistry; Uppsala University; Box 574 75123 Uppsala Sweden
| |
Collapse
|
12
|
Schöbel JH, Passia MT, Wolter NA, Puttreddy R, Rissanen K, Bolm C. 1,2,6-Thiadiazine 1-Oxides: Unsaturated Three-Dimensional S,N-Heterocycles from Sulfonimidamides. Org Lett 2020; 22:2702-2706. [DOI: 10.1021/acs.orglett.0c00666] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jan-Hendrik Schöbel
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Marco Thomas Passia
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Nadja Anna Wolter
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Rakesh Puttreddy
- University of Jyvaskyla, Department of Chemistry, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - Kari Rissanen
- University of Jyvaskyla, Department of Chemistry, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - Carsten Bolm
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| |
Collapse
|
13
|
Küçükbay H, Buğday N, Küçükbay FZ, Ageli A, Bartolucci G, Supuran CT. Synthesis and human carbonic anhydrase I, II, VA, and XII inhibition with novel amino acid-sulphonamide conjugates. J Enzyme Inhib Med Chem 2020; 35:489-497. [PMID: 31914827 PMCID: PMC6968503 DOI: 10.1080/14756366.2019.1710503] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
A series of amino acid-sulphonamide conjugates was prepared through benzotriazole mediated coupling reactions and characterised by 1H-NMR, 13C-NMR, MS, and FTIR spectroscopic techniques as well as elemental analysis. The carbonic anhydrase (CA, EC 4.2.1.1) inhibitory activity of the new compounds was determined against four human (h) isoforms, hCA I, hCA II, hCA VA, and hCA XII. Most of the synthesised compounds showed effective in vitro CA inhibitory properties. The new amino acid-sulphonamide conjugates showed potent inhibitory activity against hCA II, some of them at subnanomolar levels, exhibiting more effective inhibitory activity compared to the standard drug acetazolamide. Some of these sulphonamides were also found to be effective inhibitors of hCA I, hCA VA, and hCA XII, with activity from the low to high nanomolar range.
Collapse
Affiliation(s)
- Hasan Küçükbay
- Department of Chemistry, Faculty of Arts and Sciences, İnönü University, Malatya, Turkey
| | - Nesrin Buğday
- Department of Chemistry, Faculty of Arts and Sciences, İnönü University, Malatya, Turkey
| | - F Zehra Küçükbay
- Department of Basic Pharmaceutical Sciences, Faculty of Pharmacy, İnönü University, Malatya, Turkey
| | - Andrea Ageli
- Dipartimento Neurofarba, Sezione Di Scienze Farmaceutiche E Nutraceutiche, Università degli Studi di Firenze, Florence, Italy
| | - Gianluca Bartolucci
- Dipartimento Neurofarba, Sezione Di Scienze Farmaceutiche E Nutraceutiche, Università degli Studi di Firenze, Florence, Italy
| | - Claudiu T Supuran
- Dipartimento Neurofarba, Sezione Di Scienze Farmaceutiche E Nutraceutiche, Università degli Studi di Firenze, Florence, Italy
| |
Collapse
|
14
|
Shamout F, Fischer L, Snyder NL, Hartmann L. Recovery, Purification, and Reusability of Building Blocks for Solid Phase Synthesis. Macromol Rapid Commun 2019; 41:e1900473. [PMID: 31794100 DOI: 10.1002/marc.201900473] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 10/30/2019] [Indexed: 12/29/2022]
Abstract
Solid phase synthesis (SPS) is well established for the synthesis of biomacromolecules such as peptides, oligonucelotides, and oligosaccharides, and today is also used for the synthesis of synthetic macromolecules and polymers. The key feature of this approach is the stepwise assembly of building blocks on solid support, enabling monodispersity and monomer sequence control. However, in order to achieve such control, a high excess of building blocks is required during the reaction. Herein, the recovery, purification, and reusability of building blocks used in SPS, including representative examples of tailor-made building blocks, Fmoc-protected amino acids, and functionalized carbohydrate ligands, are reported for the first time. Results demonstrate the general applicability with recovery in high yields and high purity. Furthermore, the described recovery process can be applied in both manual and automated synthesis using a standard peptide synthesizer. Overall, this process is envisioned to be applicable for a large variety of building blocks used in the SPS of different types of molecules, and to contribute to more resourceful SPS syntheses.
Collapse
Affiliation(s)
- Fadi Shamout
- Heinrich-Heine-Universität, Department for Organic Chemistry and Macromolecular Chemistry, Universitätsstraße 1, 40225, Düsseldorf, Germany
| | - Lukas Fischer
- Heinrich-Heine-Universität, Department for Organic Chemistry and Macromolecular Chemistry, Universitätsstraße 1, 40225, Düsseldorf, Germany
| | - Nicole L Snyder
- Davidson College, Department of Chemistry, Davidson, NC, 28035, USA
| | - Laura Hartmann
- Heinrich-Heine-Universität, Department for Organic Chemistry and Macromolecular Chemistry, Universitätsstraße 1, 40225, Düsseldorf, Germany
| |
Collapse
|
15
|
Briggs EL, Tota A, Colella M, Degennaro L, Luisi R, Bull JA. Synthesis of Sulfonimidamides from Sulfenamides via an Alkoxy‐amino‐λ
6
‐sulfanenitrile Intermediate. Angew Chem Int Ed Engl 2019; 58:14303-14310. [DOI: 10.1002/anie.201906001] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 07/26/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Edward L. Briggs
- Department of Chemistry Imperial College London Molecular Sciences Research Hub White City Campus Wood Lane W12 0BZ UK
| | - Arianna Tota
- Department of Pharmacy-Drug Sciences University of Bari “A. Moro” Via E. Orabona 4 Bari 70125 Italy
| | - Marco Colella
- Department of Pharmacy-Drug Sciences University of Bari “A. Moro” Via E. Orabona 4 Bari 70125 Italy
| | - Leonardo Degennaro
- Department of Pharmacy-Drug Sciences University of Bari “A. Moro” Via E. Orabona 4 Bari 70125 Italy
| | - Renzo Luisi
- Department of Pharmacy-Drug Sciences University of Bari “A. Moro” Via E. Orabona 4 Bari 70125 Italy
| | - James A. Bull
- Department of Chemistry Imperial College London Molecular Sciences Research Hub White City Campus Wood Lane W12 0BZ UK
| |
Collapse
|
16
|
Briggs EL, Tota A, Colella M, Degennaro L, Luisi R, Bull JA. Synthesis of Sulfonimidamides from Sulfenamides via an Alkoxy‐amino‐λ
6
‐sulfanenitrile Intermediate. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Edward L. Briggs
- Department of Chemistry Imperial College London Molecular Sciences Research Hub White City Campus Wood Lane W12 0BZ UK
| | - Arianna Tota
- Department of Pharmacy-Drug Sciences University of Bari “A. Moro” Via E. Orabona 4 Bari 70125 Italy
| | - Marco Colella
- Department of Pharmacy-Drug Sciences University of Bari “A. Moro” Via E. Orabona 4 Bari 70125 Italy
| | - Leonardo Degennaro
- Department of Pharmacy-Drug Sciences University of Bari “A. Moro” Via E. Orabona 4 Bari 70125 Italy
| | - Renzo Luisi
- Department of Pharmacy-Drug Sciences University of Bari “A. Moro” Via E. Orabona 4 Bari 70125 Italy
| | - James A. Bull
- Department of Chemistry Imperial College London Molecular Sciences Research Hub White City Campus Wood Lane W12 0BZ UK
| |
Collapse
|
17
|
Bachon AK, Hermann A, Bolm C. 3D Heterocycles from Sulfonimidamides by Sequential C-H Bond Alkenylation/Aza-Michael Cyclization. Chemistry 2019; 25:5889-5892. [PMID: 30875444 DOI: 10.1002/chem.201900920] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Indexed: 12/29/2022]
Abstract
Starting from NH-sulfonimidamides, rhodium-catalyzed C-H bond alkenylation followed by aza-Michael cyclization leads to unprecedented benzoisothiazole 1-oxides. The applicability and robustness of the method is demonstrated in 25 examples with yields up to 95 %. The resulting scaffolds are partly saturated, 3D heterocycles with potential significance for medicinal and agricultural chemistry.
Collapse
Affiliation(s)
- Anne-Katrin Bachon
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Alina Hermann
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Carsten Bolm
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| |
Collapse
|