1
|
Piringer M, Stockhammer L, Vogl L, Weinzierl D, Zebrowski P, Waser M. Enantioselective α-heterofunctionalization reactions of catalytically generated C1-Lewis base enolates. TETRAHEDRON CHEM 2024; 9:100063. [PMID: 38846753 PMCID: PMC7616070 DOI: 10.1016/j.tchem.2024.100063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/09/2024]
Abstract
Chiral Lewis base (LB) organocatalysis has emerged as a powerful covalent catalysis concept which allows for highly selective asymmetric C-C and C-heteroatom bond formations. Considering significant recent progress in the development of strategies to access α-heterofunctionalized carboxylic acid derivatives under chiral LB catalysis, we wish to summarize the most significant concepts and advances in this field within this mini review now.
Collapse
Affiliation(s)
| | | | | | | | | | - Mario Waser
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria
| |
Collapse
|
2
|
Popov AV, Kobelevskaya VA, Borodin NI, Zinchenko SV. α,β-Unsaturated CF3-ketones via secondary amine salts-catalyzed aldol condensation of 1,1,1-trufluoroacetone with aromatic and heteroaromatic aldehydes. J Fluor Chem 2023. [DOI: 10.1016/j.jfluchem.2023.110108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
|
3
|
Abdelhamid Y, Kasten K, Dunne J, Hartley WC, Young CM, Cordes DB, Slawin AMZ, Ng S, Smith AD. Isothiourea-Catalyzed [2 + 2] Cycloaddition of C(1)-Ammonium Enolates and N-Alkyl Isatins. Org Lett 2022; 24:5444-5449. [PMID: 35848722 PMCID: PMC9490795 DOI: 10.1021/acs.orglett.2c02170] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Enantioselective [2 + 2] cycloaddition of C(1)-ammonium
enolates
generated catalytically using the isothiourea HyperBTM with N-alkyl isatins gives spirocyclic β-lactones. In situ ring opening with an amine nucleophile generates
isolable highly enantioenriched products in up to 92:8 dr and in >99:1
er.
Collapse
Affiliation(s)
- Yusra Abdelhamid
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, U.K., KY16 9ST
| | - Kevin Kasten
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, U.K., KY16 9ST
| | - Joanne Dunne
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, U.K., KY16 9ST
| | - Will C Hartley
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, U.K., KY16 9ST
| | - Claire M Young
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, U.K., KY16 9ST
| | - David B Cordes
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, U.K., KY16 9ST
| | - Alexandra M Z Slawin
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, U.K., KY16 9ST
| | - Sean Ng
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, U.K
| | | |
Collapse
|
4
|
Ke C, Cao Q, Luo Y, Liu X, Feng X. Catalytic asymmetric amination of azlactones with azobenzenes. Chem Commun (Camb) 2022; 58:5881-5884. [PMID: 35470829 DOI: 10.1039/d2cc01656g] [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
We reported an efficient asymmetric amination of azlactones with N-aryl-N-aroyldiazenes through a chiral N,N'-dioxide-based Lewis acid catalyst. The multicoordination ability of Nd(III) enabled it to simultaneously activate and to locate the two reactants for N-selective addition. Hydrazine-bearing azlactone derivatives were obtained in moderate to good yields with high enantioselectivity.
Collapse
Affiliation(s)
- Chaoqi Ke
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China.
| | - Qiuhui Cao
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China.
| | - Yao Luo
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China.
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China.
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China.
| |
Collapse
|
5
|
McLaughlin C, Bitai J, Barber LJ, Slawin AMZ, Smith AD. Catalytic enantioselective synthesis of 1,4-dihydropyridines via the addition of C(1)-ammonium enolates to pyridinium salts. Chem Sci 2021; 12:12001-12011. [PMID: 34667566 PMCID: PMC8457386 DOI: 10.1039/d1sc03860e] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 08/05/2021] [Indexed: 12/30/2022] Open
Abstract
The regio- and stereoselective addition of C(1)-ammonium enolates - generated in situ from aryl esters and the isothiourea catalyst (R)-BTM - to pyridinium salts bearing an electron withdrawing substituent in the 3-position allows the synthesis of a range of enantioenriched 1,4-dihydropyridines. This represents the first organocatalytic approach to pyridine dearomatisation using pronucleophiles at the carboxylic acid oxidation level. Optimisation studies revealed a significant solvent dependency upon product enantioselectivity, with only toluene providing significant asymmetric induction. Using DABCO as a base also proved beneficial for product enantioselectivity, while investigations into the nature of the counterion showed that co-ordinating bromide or chloride substrates led to higher product er than the corresponding tetrafluoroborate or hexafluorophosphate. The scope and limitations of this process are developed, with enantioselective addition to 3-cyano- or 3-sulfonylpyridinium salts giving the corresponding 1,4-dihydropyridines (15 examples, up to 95 : 5 dr and 98 : 2 er).
Collapse
Affiliation(s)
- Calum McLaughlin
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - Jacqueline Bitai
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - Lydia J Barber
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - Alexandra M Z Slawin
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| |
Collapse
|
6
|
Li Y, Li Z, Zhang Z. Mechanism and regio- and stereoselectivity in an NHC-catalyzed Mannich/lactamization domino reaction. Phys Chem Chem Phys 2021; 23:6204-6212. [PMID: 33687420 DOI: 10.1039/d1cp00369k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Density functional theory (DFT) calculations (M06-2X) have been employed to disclose the mechanisms and regio- and stereo-selectivities of the N-heterocyclic carbene (NHC)-catalyzed reaction of 2-benzothiazolimines and α-chloroaldehydes. The preferred mechanism is initiated by the nucleophilic attack of NHC on α-chloroaldehyde (first step), followed by 1,2-proton transfer which was assisted by the Brønsted acid DABCO·H+ to generate the Breslow intermediate (second step). The cleavage of the C-Cl bond (third step) and deprotonation (fourth step) form the enolate intermediate. This further reacts with 2-benzothiazolimine which leads to the formation of a new C-C bond (fifth step). Subsequent cyclization takes place via the formation of a new C-N bond (sixth step). Catalyst regeneration completes the whole catalytic cycle and affords the final product (seventh step). The DFT results indicate that the fifth step determines the stereochemistry of the reaction and leads to benzothiazolopyrimidinone with the SS configuration, which agrees well with experimental observations. Intramolecular cyclization is found to be the regioselectivity-determining step, for which the [4+2] annulation pathway is more preferred than that via [2+2] annulation, which again agrees well with experimental observations. Based on the mechanism proposed, the origins of regio- and stereoselectivities have also been investigated by performing distortion/interaction, natural bond orbital (NBO) and non-covalent interaction (NCI) analyses. The mechanistic insights gained in this work should be helpful in the rational design of potential catalysts for analogous reactions.
Collapse
Affiliation(s)
- Yan Li
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, P. R. China.
| | - Zhilin Li
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, P. R. China.
| | - Zhiqiang Zhang
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, P. R. China.
| |
Collapse
|
7
|
Guo X, Chen X, Cheng Y, Chang X, Li X, Li P. Organocatalytic enantioselective [2 + 4]-annulation of γ-substituted allenoates with N-acyldiazenes for the synthesis of optically active 1,3,4-oxadiazines. Org Biomol Chem 2021; 19:1727-1731. [PMID: 33538742 DOI: 10.1039/d0ob02508a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An enantioselective [2 + 4]-annulation of γ-substituted allenoates with N-acyldiazenes has been developed for the first time. In the presence of an l-proline-derived DMAP analogue, the annulation proceeded smoothly to afford a broad range of 1,3,4-oxadiazine derivatives in good to excellent yields with high stereoselectivities.
Collapse
Affiliation(s)
- Xing Guo
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, College of Science, Southern University of Science and Technology, Shenzhen 518055, China. and Department of Chemistry, State Key Lab of Synthetic Chemistry, The University of Hong Kong, Hong Kong, China.
| | - Xuling Chen
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, College of Science, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Yuyu Cheng
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, College of Science, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Xiaoyong Chang
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, College of Science, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Xuechen Li
- Department of Chemistry, State Key Lab of Synthetic Chemistry, The University of Hong Kong, Hong Kong, China.
| | - Pengfei Li
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, College of Science, Southern University of Science and Technology, Shenzhen 518055, China.
| |
Collapse
|
8
|
McLaughlin C, Smith AD. Generation and Reactivity of C(1)-Ammonium Enolates by Using Isothiourea Catalysis. Chemistry 2021; 27:1533-1555. [PMID: 32557875 PMCID: PMC7894297 DOI: 10.1002/chem.202002059] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Indexed: 12/17/2022]
Abstract
C(1)-Ammonium enolates are powerful, catalytically generated synthetic intermediates applied in the enantioselective α-functionalisation of carboxylic acid derivatives. This minireview describes the recent developments in the generation and application of C(1)-ammonium enolates from various precursors (carboxylic acids, anhydrides, acyl imidazoles, aryl esters, α-diazoketones, alkyl halides) using isothiourea Lewis base organocatalysts. Their synthetic utility in intra- and intermolecular enantioselective C-C and C-X bond forming processes on reaction with various electrophiles will be showcased utilising two distinct catalyst turnover approaches.
Collapse
Affiliation(s)
- Calum McLaughlin
- EaStCHEMSchool of ChemistryUniversity of St AndrewsNorth HaughFifeKY16 9STScotland
| | - Andrew D. Smith
- EaStCHEMSchool of ChemistryUniversity of St AndrewsNorth HaughFifeKY16 9STScotland
| |
Collapse
|
9
|
Felicetti T, Burali MS, Gwee CP, Ki Chan KW, Alonso S, Massari S, Sabatini S, Tabarrini O, Barreca ML, Cecchetti V, Vasudevan SG, Manfroni G. Sustainable, three-component, one-pot procedure to obtain active anti-flavivirus agents. Eur J Med Chem 2020; 210:112992. [PMID: 33208235 DOI: 10.1016/j.ejmech.2020.112992] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 10/30/2020] [Accepted: 11/02/2020] [Indexed: 10/23/2022]
Abstract
The mosquito-borne viruses belonging to the genus Flavivirus such as Dengue virus (DENV) and Zika virus (ZIKV) cause human infections ranging from mild flu-like symptoms to hemorrhagic fevers, hepatitis, and neuropathies. To date, there are vaccines only for few flaviviruses while no effective treatments are available. Pyridobenzothiazole (PBTZ) derivatives are a class of compounds endowed with a promising broad-spectrum anti-flavivirus activity and most of them have been reported as potent inhibitors of the flaviviral NS5 polymerase. However, synthesis of PBTZ analogues entails a high number of purification steps, the use of hazardous reagents and environmentally unsustainable generation of waste. Considering the promising antiviral activity of PBTZ analogues which require further exploration, in this work, we report the development of a new and sustainable three-component reaction (3CR) that can be combined with a basic hydrolysis in a one-pot procedure to obtain the PBTZ scaffold, thus reducing the number of synthetic steps, improving yields and saving time. 3CR was significantly explored in order to demonstrate its wide scope by using different starting materials. In addition, taking advantage of these procedures, we next designed and synthesized a new set of PBTZ analogues that were tested as anti-DENV-2 and anti-ZIKV agents. Compound 22 inhibited DENV-2 NS5 polymerase with an IC50 of 10.4 μM and represented the best anti-flavivirus compound of the new series by inhibiting DENV-2- and ZIKV-infected cells with EC50 values of 1.2 and 5.0 μM, respectively, that translates into attractive selectivity indexes (SI - 83 and 20, respectively). These results strongly reaffirm PBTZ derivatives as promising anti-flavivirus agents that now can be synthesized through a convenient and sustainable 3CR in order to obtain more potent compounds for further pre-clinical development studies.
Collapse
Affiliation(s)
- Tommaso Felicetti
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via Del Liceo, 1-06123, Perugia, Italy
| | - Maria Sole Burali
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via Del Liceo, 1-06123, Perugia, Italy
| | - Chin Piaw Gwee
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, 169857, Singapore; Infectious Diseases Translational Research Programme, Department of Microbiology & Immunology, Yong Loo Lin School of Medicine, Singapore
| | - Kitti Wing Ki Chan
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, 169857, Singapore
| | - Sylvie Alonso
- Infectious Diseases Translational Research Programme, Department of Microbiology & Immunology, Yong Loo Lin School of Medicine, Singapore; Immunology Programme, Life Sciences Institute, National University of Singapore, 117545, Singapore
| | - Serena Massari
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via Del Liceo, 1-06123, Perugia, Italy
| | - Stefano Sabatini
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via Del Liceo, 1-06123, Perugia, Italy
| | - Oriana Tabarrini
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via Del Liceo, 1-06123, Perugia, Italy
| | - Maria Letizia Barreca
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via Del Liceo, 1-06123, Perugia, Italy
| | - Violetta Cecchetti
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via Del Liceo, 1-06123, Perugia, Italy
| | - Subhash G Vasudevan
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, 169857, Singapore; Infectious Diseases Translational Research Programme, Department of Microbiology & Immunology, Yong Loo Lin School of Medicine, Singapore; Institute for Glycomics, Griffith University, Queensland, 4222, Australia
| | - Giuseppe Manfroni
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via Del Liceo, 1-06123, Perugia, Italy.
| |
Collapse
|
10
|
Zhang S, Hartley WC, Greenhalgh MD, Ng S, Slawin AMZ, Smith AD. Isothiourea‐Catalyzed Synthesis of Pyrrole‐ and Indole‐Functionalized Tetrasubstituted Pyridines. ChemCatChem 2020. [DOI: 10.1002/cctc.202000882] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Shuyue Zhang
- EaStCHEM, School of Chemistry University of St Andrews North Haugh St Andrews Fife, KY16 9ST UK
| | - Will C. Hartley
- EaStCHEM, School of Chemistry University of St Andrews North Haugh St Andrews Fife, KY16 9ST UK
| | - Mark D. Greenhalgh
- EaStCHEM, School of Chemistry University of St Andrews North Haugh St Andrews Fife, KY16 9ST UK
| | - Sean Ng
- Syngenta Jealott's Hill International Research Centre Bracknell Berkshire, RG42 6EY UK
| | - Alexandra M. Z. Slawin
- EaStCHEM, School of Chemistry University of St Andrews North Haugh St Andrews Fife, KY16 9ST UK
| | - Andrew D. Smith
- EaStCHEM, School of Chemistry University of St Andrews North Haugh St Andrews Fife, KY16 9ST UK
| |
Collapse
|
11
|
Shi L, Liu Y, Wang C, Yuan X, Liu X, Wu L, Pan Z, Yu Q, Xu C, Yang G. Synthesis of 1-(β-coumarinyl)-1-(β-indolyl)trifluoroethanols through regioselective Friedel-Crafts alkylation of indoles with β-(trifluoroacetyl)coumarins catalyzed by Sc(OTf) 3. RSC Adv 2020; 10:13929-13935. [PMID: 35498470 PMCID: PMC9051918 DOI: 10.1039/d0ra01237h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 03/20/2020] [Indexed: 11/22/2022] Open
Abstract
A highly efficient Friedel-Crafts alkylation of indole derivatives with β-(trifluoroacetyl)coumarins using Sc(OTf)3 as a catalyst has been developed, which gives regioselective 1,2-adducts to afford 1-(β-coumarinyl)-1-(β-indolyl)trifluoroethanols. A series of tertiary trifluoroethanols containing different indole and coumarin groups were synthesized in moderate to excellent yields (up to 95%) in the presence of 5 mol% catalyst in a short time (only 2 minutes at least). A mechanism of the reaction, in which the trace amount of water plays the role of proton transfer in catalyzing circulation was proposed and confirmed.
Collapse
Affiliation(s)
- Lijun Shi
- School of Science, Henan Agricultural University Zhengzhou 450002 P. R. China
| | - Ying Liu
- School of Science, Henan Agricultural University Zhengzhou 450002 P. R. China
| | - Caixia Wang
- School of Science, Henan Agricultural University Zhengzhou 450002 P. R. China
| | - Xinxin Yuan
- College of Resource and Environment, Henan Agricultural University Zhengzhou 450002 P. R. China
| | - Xiaobiao Liu
- School of Science, Henan Agricultural University Zhengzhou 450002 P. R. China
| | - Lulu Wu
- School of Science, Henan Agricultural University Zhengzhou 450002 P. R. China
| | - Zhenliang Pan
- School of Science, Henan Agricultural University Zhengzhou 450002 P. R. China
| | - Qicheng Yu
- College of Animal Science and Veterinary Medicine, Henan Agricultural University Zhengzhou 450002 P. R. China
| | - Cuilian Xu
- School of Science, Henan Agricultural University Zhengzhou 450002 P. R. China
| | - Guoyu Yang
- School of Science, Henan Agricultural University Zhengzhou 450002 P. R. China
| |
Collapse
|
12
|
Zhang S, Greenhalgh MD, Slawin AMZ, Smith AD. Tandem sequential catalytic enantioselective synthesis of highly-functionalised tetrahydroindolizine derivatives. Chem Sci 2020; 11:3885-3892. [PMID: 34122857 PMCID: PMC8152628 DOI: 10.1039/d0sc00432d] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
An isothiourea-catalysed enantioselective synthesis of novel tetrahydroindolizine derivatives is reported through a one-pot tandem sequential process. The application of 2-(pyrrol-1-yl)acetic acid in combination with either a trifluoromethyl enone or an α-keto-β,γ-unsaturated ester in an enantioselective Michael addition–lactonisation process, followed by in situ ring-opening and cyclisation, led to a range of 24 tetrahydroindolizine derivatives containing three stereocentres in up to >95 : 5 dr and >99 : 1 er. The isothiourea-catalysed enantioselective synthesis of tetrahydroindolizine derivatives containing three stereocentres is reported through a one-pot tandem sequential process.![]()
Collapse
Affiliation(s)
- Shuyue Zhang
- EaStCHEM, School of Chemistry, University of St Andrews North Haugh St Andrews KY16 9ST UK
| | - Mark D Greenhalgh
- EaStCHEM, School of Chemistry, University of St Andrews North Haugh St Andrews KY16 9ST UK
| | - Alexandra M Z Slawin
- EaStCHEM, School of Chemistry, University of St Andrews North Haugh St Andrews KY16 9ST UK
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St Andrews North Haugh St Andrews KY16 9ST UK
| |
Collapse
|
13
|
Fan T, Zhang ZJ, Zhang YC, Song J. Construction of All-Carbon Quaternary Stereocenters via Sequential Photoactivation/Isothiourea Catalysis. Org Lett 2019; 21:7897-7901. [DOI: 10.1021/acs.orglett.9b02892] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Tao Fan
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Zi-Jing Zhang
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Yu-Chen Zhang
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Jin Song
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| |
Collapse
|
14
|
Broad spectrum anti-flavivirus pyridobenzothiazolones leading to less infective virions. Antiviral Res 2019; 167:6-12. [DOI: 10.1016/j.antiviral.2019.03.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 02/27/2019] [Accepted: 03/04/2019] [Indexed: 11/22/2022]
|
15
|
Jarrige L, Glavač D, Levitre G, Retailleau P, Bernadat G, Neuville L, Masson G. Chiral phosphoric acid-catalyzed enantioselective construction of structurally diverse benzothiazolopyrimidines. Chem Sci 2019; 10:3765-3769. [PMID: 31015920 PMCID: PMC6461124 DOI: 10.1039/c8sc05581e] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 02/06/2019] [Indexed: 11/24/2022] Open
Abstract
A highly efficient catalytic enantioselective [4+2] cycloaddition was developed between 2-benzothiazolimines and enecarbamates. A wide range of benzothiazolopyrimidines bearing three contiguous stereogenic centers was obtained in high to excellent yields and with excellent diastereo- and enantioselectivities (d.r. > 98 : 2 and up to >99% ee). Furthermore, this chiral phosphoric acid-catalyzed strategy was scalable and enabled access to a new class of optically pure Lewis base isothiourea derivatives.
Collapse
Affiliation(s)
- Lucie Jarrige
- Institut de Chimie des Substances Naturelles , CNRS UPR 2301 , Université Paris-Sud , Université Paris-Saclay , 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex , France .
| | - Danijel Glavač
- Institut de Chimie des Substances Naturelles , CNRS UPR 2301 , Université Paris-Sud , Université Paris-Saclay , 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex , France .
- Ruđer Bošković Institute , Division of Organic Chemistry and Biochemistry , Bijenička cesta 54 , 10000 Zagreb , Croatia
| | - Guillaume Levitre
- Institut de Chimie des Substances Naturelles , CNRS UPR 2301 , Université Paris-Sud , Université Paris-Saclay , 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex , France .
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles , CNRS UPR 2301 , Université Paris-Sud , Université Paris-Saclay , 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex , France .
| | - Guillaume Bernadat
- Laboratoire Chimie Thérapeutique , Faculté de Pharmacie Biocis 8076 , LabEx LERMIT , 5, rue J. B. Clément, 92296 Châtenay Malabry , France
| | - Luc Neuville
- Institut de Chimie des Substances Naturelles , CNRS UPR 2301 , Université Paris-Sud , Université Paris-Saclay , 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex , France .
| | - Géraldine Masson
- Institut de Chimie des Substances Naturelles , CNRS UPR 2301 , Université Paris-Sud , Université Paris-Saclay , 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex , France .
| |
Collapse
|
16
|
Zhao Q, Ren L, Hou J, Yu W, Chang J. Annulation Reactions of In-Situ-Generated N-(Het)aroyldiazenes with Isothiocyanates Leading to 2-Imino-1,3,4-oxadiazolines. Org Lett 2019; 21:210-213. [PMID: 30547596 DOI: 10.1021/acs.orglett.8b03663] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A novel annulation reaction of N-(het)aroyldiazenes and isothiocyanates has been established. This transformation involves a sequential cyclization and desulfurization/intramolecular rearrangement to produce 2-imino-1,3,4-oxadiazolines. The less-stable N-(het)aroyldiazenes can be conveniently generated in situ by I2-mediated oxidation of hydrazides, which allows a one-pot synthesis of the products directly from readily accessible hydrazide and isothiocyanate substrates. This operationally simple synthetic process requires no use of malodorous isocyanides and can be conveniently conducted on a gram scale.
Collapse
Affiliation(s)
- Qiongli Zhao
- College of Chemistry and Molecular Engineering; Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province; School of Pharmaceutical Sciences , Zhengzhou University , Zhengzhou , Henan Province 450001 , China
| | - Linning Ren
- College of Chemistry and Molecular Engineering; Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province; School of Pharmaceutical Sciences , Zhengzhou University , Zhengzhou , Henan Province 450001 , China
| | - Jiao Hou
- College of Chemistry and Molecular Engineering; Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province; School of Pharmaceutical Sciences , Zhengzhou University , Zhengzhou , Henan Province 450001 , China
| | - Wenquan Yu
- College of Chemistry and Molecular Engineering; Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province; School of Pharmaceutical Sciences , Zhengzhou University , Zhengzhou , Henan Province 450001 , China
| | - Junbiao Chang
- College of Chemistry and Molecular Engineering; Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province; School of Pharmaceutical Sciences , Zhengzhou University , Zhengzhou , Henan Province 450001 , China
| |
Collapse
|
17
|
Young CM, Taylor JE, Smith AD. Evaluating aryl esters as bench-stable C(1)-ammonium enolate precursors in catalytic, enantioselective Michael addition–lactonisations. Org Biomol Chem 2019; 17:4747-4752. [DOI: 10.1039/c9ob00703b] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
An evaluation of a range of aryl, alkyl and vinyl esters as prospective C(1)-ammonium enolate precursors in enantioselective Michael addition–lactonisation processes with (E)-trifluoromethylenones using isothiourea catalysis is reported.
Collapse
Affiliation(s)
- Claire M. Young
- EaStCHEM
- School of Chemistry
- University of St Andrews
- North Haugh
- UK
| | - James E. Taylor
- EaStCHEM
- School of Chemistry
- University of St Andrews
- North Haugh
- UK
| | - Andrew D. Smith
- EaStCHEM
- School of Chemistry
- University of St Andrews
- North Haugh
- UK
| |
Collapse
|
18
|
Bortolamiol E, Chiminazzo A, Sperni L, Borsato G, Fabris F, Scarso A. Functional bisphosphonate synthesis for the development of new anti-resorption bone drug candidates. NEW J CHEM 2019. [DOI: 10.1039/c9nj02504a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Widening the bisphosphonate toolbox: new bisphosphonate scaffolds enable new functionalizations.
Collapse
Affiliation(s)
- Enrica Bortolamiol
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari di Venezia
- Mestre
- Italy
| | - Andrea Chiminazzo
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari di Venezia
- Mestre
- Italy
| | - Laura Sperni
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari di Venezia
- Mestre
- Italy
| | - Giuseppe Borsato
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari di Venezia
- Mestre
- Italy
| | - Fabrizio Fabris
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari di Venezia
- Mestre
- Italy
| | - Alessandro Scarso
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari di Venezia
- Mestre
- Italy
| |
Collapse
|
19
|
Zhang S, Taylor JE, Slawin AMZ, Smith AD. Isothiourea-Catalyzed Enantioselective Functionalization of 2-Pyrrolyl Acetic Acid: Two-Step Synthesis of Stereodefined Dihydroindolizinones. Org Lett 2018; 20:5482-5485. [DOI: 10.1021/acs.orglett.8b02423] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shuyue Zhang
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife, KY16 9ST, U.K
| | - James E. Taylor
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife, KY16 9ST, U.K
| | - Alexandra M. Z. Slawin
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife, KY16 9ST, U.K
| | - Andrew D. Smith
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife, KY16 9ST, U.K
| |
Collapse
|
20
|
Arokianathar JN, Frost AB, Slawin AMZ, Stead D, Smith AD. Isothiourea-Catalyzed Enantioselective Addition of 4-Nitrophenyl Esters to Iminium Ions. ACS Catal 2018. [DOI: 10.1021/acscatal.7b02697] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Jude N. Arokianathar
- EaStCHEM,
School of Chemistry, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, United Kingdom
| | - Aileen B. Frost
- EaStCHEM,
School of Chemistry, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, United Kingdom
| | - Alexandra M. Z. Slawin
- EaStCHEM,
School of Chemistry, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, United Kingdom
| | - Darren Stead
- Medicinal Chemistry, Oncology, IMED Biotech Unit, AstraZeneca, Cambridge, United Kingdom
| | - Andrew D. Smith
- EaStCHEM,
School of Chemistry, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, United Kingdom
| |
Collapse
|
21
|
Shi Q, Zhang W, Wang Y, Qu L, Wei D. Insights into the isothiourea-catalyzed asymmetric [4 + 2] annulation of phenylacetic acid with alkylidene pyrazolone. Org Biomol Chem 2018. [DOI: 10.1039/c7ob03142d] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A computational study on the isothiourea-catalyzed asymmetric [4 + 2] annulation of phenylacetic acid with alkylidene pyrazolone was performed using the DFT method.
Collapse
Affiliation(s)
- Qianqian Shi
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Wei Zhang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Yang Wang
- Department of Material and Chemical Engineering
- Zhengzhou University of Light Industry
- Zhengzhou
- P.R. China
| | - Lingbo Qu
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Donghui Wei
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| |
Collapse
|
22
|
Duan J, Cheng Y, Cheng J, Li R, Li P. Organocatalytic Asymmetric Benzylation and Aldol-Hemiacetalization of α,β-Unsaturated Trifluoromethyl Ketones: Efficient Enantioselective Construction of 3,4-Dihydroisocoumarins. Chemistry 2016; 23:519-523. [DOI: 10.1002/chem.201604920] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Jindian Duan
- Department of Chemistry; South University of Science and Technology of China; 1088 Xueyuan Blvd., Nanshan District Shenzhen, Guangdong 518055 P. R. China
| | - Yuyu Cheng
- Department of Chemistry; South University of Science and Technology of China; 1088 Xueyuan Blvd., Nanshan District Shenzhen, Guangdong 518055 P. R. China
| | - Jing Cheng
- Department of Chemistry; South University of Science and Technology of China; 1088 Xueyuan Blvd., Nanshan District Shenzhen, Guangdong 518055 P. R. China
| | - Rou Li
- Department of Chemistry; South University of Science and Technology of China; 1088 Xueyuan Blvd., Nanshan District Shenzhen, Guangdong 518055 P. R. China
| | - Pengfei Li
- Department of Chemistry; South University of Science and Technology of China; 1088 Xueyuan Blvd., Nanshan District Shenzhen, Guangdong 518055 P. R. China
| |
Collapse
|
23
|
Young CM, Stark DG, West TH, Taylor JE, Smith AD. Exploiting the Imidazolium Effect in Base-free Ammonium Enolate Generation: Synthetic and Mechanistic Studies. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608046] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Claire M. Young
- EaStCHEM, School of Chemistry; University of St Andrews; North Haugh St Andrews Fife KY16 9ST UK
| | - Daniel G. Stark
- EaStCHEM, School of Chemistry; University of St Andrews; North Haugh St Andrews Fife KY16 9ST UK
| | - Thomas H. West
- EaStCHEM, School of Chemistry; University of St Andrews; North Haugh St Andrews Fife KY16 9ST UK
| | - James E. Taylor
- EaStCHEM, School of Chemistry; University of St Andrews; North Haugh St Andrews Fife KY16 9ST UK
| | - Andrew D. Smith
- EaStCHEM, School of Chemistry; University of St Andrews; North Haugh St Andrews Fife KY16 9ST UK
| |
Collapse
|
24
|
Young CM, Stark DG, West TH, Taylor JE, Smith AD. Exploiting the Imidazolium Effect in Base-free Ammonium Enolate Generation: Synthetic and Mechanistic Studies. Angew Chem Int Ed Engl 2016; 55:14394-14399. [DOI: 10.1002/anie.201608046] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 09/22/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Claire M. Young
- EaStCHEM, School of Chemistry; University of St Andrews; North Haugh St Andrews Fife KY16 9ST UK
| | - Daniel G. Stark
- EaStCHEM, School of Chemistry; University of St Andrews; North Haugh St Andrews Fife KY16 9ST UK
| | - Thomas H. West
- EaStCHEM, School of Chemistry; University of St Andrews; North Haugh St Andrews Fife KY16 9ST UK
| | - James E. Taylor
- EaStCHEM, School of Chemistry; University of St Andrews; North Haugh St Andrews Fife KY16 9ST UK
| | - Andrew D. Smith
- EaStCHEM, School of Chemistry; University of St Andrews; North Haugh St Andrews Fife KY16 9ST UK
| |
Collapse
|
25
|
Stark DG, Williamson P, Gayner ER, Musolino SF, Kerr RWF, Taylor JE, Slawin AMZ, O'Riordan TJC, Macgregor SA, Smith AD. Isothiourea-catalysed enantioselective pyrrolizine synthesis: synthetic and computational studies. Org Biomol Chem 2016; 14:8957-65. [PMID: 27489030 PMCID: PMC5314687 DOI: 10.1039/c6ob01557c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 07/21/2016] [Indexed: 11/21/2022]
Abstract
The catalytic enantioselective synthesis of a range of cis-pyrrolizine carboxylate derivatives with outstanding stereocontrol (14 examples, >95 : 5 dr, >98 : 2 er) through an isothiourea-catalyzed intramolecular Michael addition-lactonisation and ring-opening approach from the corresponding enone acid is reported. An optimised and straightforward three-step synthetic route to the enone acid starting materials from readily available pyrrole-2-carboxaldehydes is delineated, with benzotetramisole (5 mol%) proving the optimal catalyst for the enantioselective process. Ring-opening of the pyrrolizine dihydropyranone products with either MeOH or a range of amines leads to the desired products in excellent yield and enantioselectivity. Computation has been used to probe the factors leading to high stereocontrol, with the formation of the observed cis-steroisomer predicted to be kinetically and thermodynamically favoured.
Collapse
Affiliation(s)
- Daniel G. Stark
- EaStCHEM , School of Chemistry , University of St Andrews , North Haugh , St Andrews , Fife KY16 9ST , UK .
| | - Patrick Williamson
- EaStCHEM , School of Chemistry , University of St Andrews , North Haugh , St Andrews , Fife KY16 9ST , UK .
| | - Emma R. Gayner
- Institute of Chemical Sciences , Heriot-Watt University , Edinburgh , EH14 4AS , UK .
| | - Stefania F. Musolino
- EaStCHEM , School of Chemistry , University of St Andrews , North Haugh , St Andrews , Fife KY16 9ST , UK .
| | - Ryan W. F. Kerr
- EaStCHEM , School of Chemistry , University of St Andrews , North Haugh , St Andrews , Fife KY16 9ST , UK .
| | - James E. Taylor
- EaStCHEM , School of Chemistry , University of St Andrews , North Haugh , St Andrews , Fife KY16 9ST , UK .
| | - Alexandra M. Z. Slawin
- EaStCHEM , School of Chemistry , University of St Andrews , North Haugh , St Andrews , Fife KY16 9ST , UK .
| | | | - Stuart A. Macgregor
- Institute of Chemical Sciences , Heriot-Watt University , Edinburgh , EH14 4AS , UK .
| | - Andrew D. Smith
- EaStCHEM , School of Chemistry , University of St Andrews , North Haugh , St Andrews , Fife KY16 9ST , UK .
| |
Collapse
|
26
|
Zhang ML, Wu ZJ, Zhao JQ, Luo Y, Xu XY, Zhang XM, Yuan WC. Michael Addition–Lactonization of Arylacetyl Phosphonate to β,γ-Unsaturated α-Keto Esters for the Synthesis of Chiral syn-3,4-Dihydropyranones and 5,6-Dihydropyranones. Org Lett 2016; 18:5110-5113. [DOI: 10.1021/acs.orglett.6b02558] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Ming-Liang Zhang
- University of Chinese Academy of Sciences, Beijing 100049, China
| | | | - Jian-Qiang Zhao
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuan Luo
- University of Chinese Academy of Sciences, Beijing 100049, China
| | | | | | | |
Collapse
|
27
|
Stark DG, Young CM, O'Riordan TJC, Slawin AMZ, Smith AD. Enantioselective isothiourea-catalysed trans-dihydropyridinone synthesis using saccharin-derived ketimines: scope and limitations. Org Biomol Chem 2016; 14:8068-73. [PMID: 27492887 DOI: 10.1039/c6ob01473a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The catalytic enantioselective synthesis of a range of trans-dihydropyridinones from aryl-, heteroaryl- and alkenylacetic acids and saccharin-derived ketimines with good to excellent stereocontrol (15 examples, up to >95 : 5 dr, up to >99 : 1 er) is reported. After extensive optimisation, HyperBTM proved the optimal isothiourea catalyst for this transformation at -78 °C, giving trans-dihydropyridones with generally excellent levels of diastereo- and enantioselectivity.
Collapse
Affiliation(s)
- Daniel G Stark
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, UK.
| | | | | | | | | |
Collapse
|
28
|
Izquierdo J, Pericàs MA. A Recyclable, Immobilized Analogue of Benzotetramisole for Catalytic Enantioselective Domino Michael Addition/Cyclization Reactions in Batch and Flow. ACS Catal 2015. [DOI: 10.1021/acscatal.5b02121] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Javier Izquierdo
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avinguda Paı̈sos Catalans 16, 43007 Tarragona, Spain
| | - Miquel A. Pericàs
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avinguda Paı̈sos Catalans 16, 43007 Tarragona, Spain
- Departament
de Quı́mica Orgànica, Universitat de Barcelona (UB), 08028 Barcelona, Spain
| |
Collapse
|
29
|
Stark DG, Morrill LC, Cordes DB, Slawin AMZ, O'Riordan TJC, Smith AD. Enantioselective Synthesis of 3,5,6-Substituted Dihydropyranones and Dihydropyridinones using Isothiourea-Mediated Catalysis. Chem Asian J 2015; 11:395-400. [PMID: 26471245 PMCID: PMC4755233 DOI: 10.1002/asia.201500907] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Indexed: 02/02/2023]
Abstract
The scope of dihydropyranone and dihydropyridinone products accessible by isothiourea-catalyzed processes has been expanded and explored through the use of 2-N-tosyliminoacrylates and 2-aroylacrylates in a Michael addition-lactonization/lactamization cascade reaction. Notably, to ensure reproducibility it is essential to use homoanhydrides as ammonium enolate precursors with 2-aroyl acrylates, while carboxylic acids can be used with 2-N-tosyliminoacrylates, delivering a range of 3,5,6-substituted dihydropyranones and dihydropyridinones with high enantioselectivity (typically >90 % ee). The derivatization of the heterocyclic core of a 3,5,6-substituted dihydropyranone through hydrogenation is also reported.
Collapse
Affiliation(s)
- Daniel G Stark
- School of Chemistry, University of St Andrews, North Haugh, St Andrews Fife, KY16 9ST, UK
| | - Louis C Morrill
- School of Chemistry, University of St Andrews, North Haugh, St Andrews Fife, KY16 9ST, UK
| | - David B Cordes
- School of Chemistry, University of St Andrews, North Haugh, St Andrews Fife, KY16 9ST, UK
| | - Alexandra M Z Slawin
- School of Chemistry, University of St Andrews, North Haugh, St Andrews Fife, KY16 9ST, UK
| | - Timothy J C O'Riordan
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire, RG42 6EY, UK
| | - Andrew D Smith
- School of Chemistry, University of St Andrews, North Haugh, St Andrews Fife, KY16 9ST, UK.
| |
Collapse
|
30
|
Ni Q, Song X, Xiong J, Raabe G, Enders D. Regio- and stereoselective synthesis of benzothiazolo-pyrimidinones via an NHC-catalyzed Mannich/lactamization domino reaction. Chem Commun (Camb) 2015; 51:1263-6. [PMID: 25476422 PMCID: PMC4612130 DOI: 10.1039/c4cc08594a] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
An NHC-catalyzed regio- and stereoselective Mannich/lactamization domino reaction of N-(benzothiazolyl)imines with α-chloroaldehydes has been developed.
An NHC-catalyzed regio- and stereoselective Mannich/lactamization domino reaction of N-(benzothiazolyl)imines with α-chloroaldehydes has been developed. This new protocol provides a facile approach for the asymmetric synthesis of benzothiazolo-pyrimidinones and a pyrrolo[1,2-a]indolone in moderate to good yields (34–78%) and excellent stereoselectivities (87–99% ee, up to >20 : 1 d.r.).
Collapse
Affiliation(s)
- Qijian Ni
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany.
| | | | | | | | | |
Collapse
|
31
|
Smith SR, Fallan C, Taylor JE, McLennan R, Daniels DSB, Morrill LC, Slawin AMZ, Smith AD. Asymmetric Isothiourea-Catalysed Formal [3+2] Cycloadditions of Ammonium Enolates with Oxaziridines. Chemistry 2015; 21:10530-6. [PMID: 26073559 PMCID: PMC4531819 DOI: 10.1002/chem.201501271] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Indexed: 11/07/2022]
Abstract
A highly enantioselective Lewis base-catalysed formal [3+2] cycloaddition of ammonium enolates and oxaziridines to give stereodefined oxazolidin-4-ones in high yield is described. Employing an enantioenriched oxaziridine in this process leads to a matched/mis-matched effect with the isothiourea catalyst and allowed the synthesis of either syn- or anti-stereodefined oxazolidin-4-ones in high d.r., yield and ee. Additionally, the oxazolidin-4-one products have been derivatised to afford functionalised enantioenriched building blocks.
Collapse
Affiliation(s)
- Siobhan R Smith
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
| | - Charlene Fallan
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
| | - James E Taylor
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
| | - Ross McLennan
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
| | - David S B Daniels
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
| | - Louis C Morrill
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
| | - Alexandra M Z Slawin
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK).
| |
Collapse
|
32
|
Morrill LC, Smith AD. Organocatalytic Lewis base functionalisation of carboxylic acids, esters and anhydrides via C1-ammonium or azolium enolates. Chem Soc Rev 2015; 43:6214-26. [PMID: 24867308 DOI: 10.1039/c4cs00042k] [Citation(s) in RCA: 148] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This tutorial review highlights the organocatalytic Lewis base functionalisation of carboxylic acids, esters and anhydrides via C1-ammonium/azolium enolates. The generation and synthetic utility of these powerful intermediates is highlighted through their application in various methodologies including aldol-lactonisations, Michael-lactonisations/lactamisations and [2,3]-rearrangements.
Collapse
Affiliation(s)
- Louis C Morrill
- EastCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife, UKKY16 9ST.
| | | |
Collapse
|
33
|
Campbell CD, Joannesse C, Morrill LC, Philp D, Smith AD. Regiodivergent Lewis base-promoted O- to C-carboxyl transfer of furanyl carbonates. Org Biomol Chem 2015; 13:2895-900. [DOI: 10.1039/c4ob02629b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Triazolinylidenes promote γ-selective C-carboxylation (up to 99 : 1 regioselectivity) in the O- to C-carboxyl transfer of furanyl carbonates in contrast to DMAP that promotes preferential α-C-carboxylation with moderate regiocontrol (typically 60 : 40 regioselectivity).
Collapse
Affiliation(s)
| | | | | | - Douglas Philp
- EaStCHEM
- School of Chemistry
- University of St Andrews
- St Andrews
- UK
| | - Andrew D. Smith
- EaStCHEM
- School of Chemistry
- University of St Andrews
- St Andrews
- UK
| |
Collapse
|
34
|
Yeh PP, Daniels DSB, Fallan C, Gould E, Simal C, Taylor JE, Slawin AMZ, Smith AD. Exploring the scope of the isothiourea-mediated synthesis of dihydropyridinones. Org Biomol Chem 2015; 13:2177-91. [DOI: 10.1039/c4ob02408g] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The exploration and expansion of the scope of the isothiourea-mediated synthesis of dihydropyridinones is presented.
Collapse
Affiliation(s)
- Pei-Pei Yeh
- EaStCHEM
- School of Chemistry
- University of St Andrews
- North Haugh
- UK
| | | | - Charlene Fallan
- EaStCHEM
- School of Chemistry
- University of St Andrews
- North Haugh
- UK
| | - Eoin Gould
- EaStCHEM
- School of Chemistry
- University of St Andrews
- North Haugh
- UK
| | - Carmen Simal
- EaStCHEM
- School of Chemistry
- University of St Andrews
- North Haugh
- UK
| | - James E. Taylor
- EaStCHEM
- School of Chemistry
- University of St Andrews
- North Haugh
- UK
| | | | - Andrew D. Smith
- EaStCHEM
- School of Chemistry
- University of St Andrews
- North Haugh
- UK
| |
Collapse
|
35
|
Stark DG, O’Riordan TJC, Smith AD. Synthesis of Di-, Tri-, and Tetrasubstituted Pyridines from (Phenylthio)carboxylic Acids and 2-[Aryl(tosylimino)methyl]acrylates. Org Lett 2014; 16:6496-9. [DOI: 10.1021/ol503360q] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Daniel G. Stark
- EaStCHEM,
School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife, KY16 9ST, United Kingdom
| | - Timothy J. C. O’Riordan
- Syngenta, Jealott’s
Hill International Research Centre, Bracknell, RG42, 6EY, United Kingdom
| | - Andrew D. Smith
- EaStCHEM,
School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife, KY16 9ST, United Kingdom
| |
Collapse
|
36
|
Morrill LC, Stark DG, Taylor JE, Smith SR, Squires JA, D'Hollander ACA, Simal C, Shapland P, O'Riordan TJC, Smith AD. Organocatalytic Michael addition–lactonisation of carboxylic acids using α,β-unsaturated trichloromethyl ketones as α,β-unsaturated ester equivalents. Org Biomol Chem 2014; 12:9016-27. [DOI: 10.1039/c4ob01788a] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
37
|
Jin Z, Chen S, Wang Y, Zheng P, Yang S, Chi YR. β-Functionalization of Carboxylic Anhydrides with β-Alkyl Substituents through Carbene Organocatalysis. Angew Chem Int Ed Engl 2014; 53:13506-9. [DOI: 10.1002/anie.201408604] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Indexed: 11/05/2022]
|
38
|
Jin Z, Chen S, Wang Y, Zheng P, Yang S, Chi YR. β-Functionalization of Carboxylic Anhydrides with β-Alkyl Substituents through Carbene Organocatalysis. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408604] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
39
|
Belmessieri D, de la Houpliere A, Calder EDD, Taylor JE, Smith AD. Stereodivergent organocatalytic intramolecular Michael addition/lactonization for the asymmetric synthesis of substituted dihydrobenzofurans and tetrahydrofurans. Chemistry 2014; 20:9762-9. [PMID: 24989672 PMCID: PMC4517160 DOI: 10.1002/chem.201402684] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Indexed: 11/19/2022]
Abstract
A stereodivergent asymmetric Lewis base catalyzed Michael addition/lactonization of enone acids into substituted dihydrobenzofuran and tetrahydrofuran derivatives is reported. Commercially available (S)-(-)-tetramisole hydrochloride gives products with high syn diastereoselectivity in excellent enantioselectivity (up to 99:1 d.r.syn/anti , 99 % eesyn ), whereas using a cinchona alkaloid derived catalyst gives the corresponding anti-diastereoisomers as the major product (up to 10:90 d.r.syn/anti , 99 % eeanti ).
Collapse
Affiliation(s)
- Dorine Belmessieri
- EaStCHEM, School of Chemistry, University of St. AndrewsNorth Haugh, St. Andrews, KY16 9ST (UK) E-mail:
| | - Alix de la Houpliere
- EaStCHEM, School of Chemistry, University of St. AndrewsNorth Haugh, St. Andrews, KY16 9ST (UK) E-mail:
| | - Ewen D D Calder
- EaStCHEM, School of Chemistry, University of St. AndrewsNorth Haugh, St. Andrews, KY16 9ST (UK) E-mail:
| | - James E Taylor
- EaStCHEM, School of Chemistry, University of St. AndrewsNorth Haugh, St. Andrews, KY16 9ST (UK) E-mail:
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St. AndrewsNorth Haugh, St. Andrews, KY16 9ST (UK) E-mail:
| |
Collapse
|
40
|
Jiang S, Hu B, Yu X, Deng W. Fc-PIP Catalyzed Asymmetric Synthesis ofcis-2,3-Dihydrobenzofurans. CHINESE J CHEM 2014. [DOI: 10.1002/cjoc.201400186] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
41
|
Smith SR, Leckie SM, Holmes R, Douglas J, Fallan C, Shapland P, Pryde D, Slawin AMZ, Smith AD. α-Ketophosphonates as ester surrogates: isothiourea-catalyzed asymmetric diester and lactone synthesis. Org Lett 2014; 16:2506-9. [PMID: 24734989 DOI: 10.1021/ol500873s] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Isothiourea HBTM-2.1 catalyzes the asymmetric Michael addition/lactonization of aryl- and alkenylacetic acids using α-keto-β,γ-unsaturated phosphonates as α,β-unsaturated ester surrogates, giving access to a diverse range of stereodefined lactones or enantioenriched functionalized diesters upon ring-opening.
Collapse
Affiliation(s)
- Siobhan R Smith
- EaStCHEM, School of Chemistry, University of St. Andrews , North Haugh, St. Andrews KY16 9ST, U.K
| | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Smith SR, Douglas J, Prevet H, Shapland P, Slawin AMZ, Smith AD. Isothiourea-Catalyzed Asymmetric Synthesis of β-Lactams and β-Amino Esters from Arylacetic Acid Derivatives and N-Sulfonylaldimines. J Org Chem 2014; 79:1626-39. [DOI: 10.1021/jo402590m] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Siobhan R. Smith
- EaStCHEM,
School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, U.K
| | - James Douglas
- EaStCHEM,
School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, U.K
| | - Hugues Prevet
- EaStCHEM,
School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, U.K
| | - Peter Shapland
- GSK, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Alexandra M. Z. Slawin
- EaStCHEM,
School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, U.K
| | - Andrew D. Smith
- EaStCHEM,
School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, U.K
| |
Collapse
|
43
|
Morrill LC, Smith SM, Slawin AMZ, Smith AD. Isothiourea-mediated asymmetric functionalization of 3-alkenoic acids. J Org Chem 2014; 79:1640-55. [PMID: 24498850 DOI: 10.1021/jo402591v] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Isothiourea HBTM-2.1 promotes the catalytic asymmetric α-functionalization of 3-alkenoic acids through formal [2 + 2] cycloadditions with N-tosyl aldimines and formal [4 + 2] cycloadditions with either 4-aryltrifluoromethyl enones or N-aryl-N-aroyl diazenes, providing useful synthetic building blocks in good yield and with excellent enantiocontrol (up to >99% ee). Stereodefined products are amenable to further synthetic elaboration through manipulation of the olefinic functionality.
Collapse
Affiliation(s)
- Louis C Morrill
- EaStCHEM, School of Chemistry, University of St Andrews , North Haugh, St Andrews, KY16 9ST, U.K
| | | | | | | |
Collapse
|