1
|
Luo Z, Liao M, Li W, Zhao S, Tang K, Zheng P, Chi YR, Zhang X, Wu X. Ionic Hydrogen Bond-Assisted Catalytic Construction of Nitrogen Stereogenic Center via Formal Desymmetrization of Remote Diols. Angew Chem Int Ed Engl 2024; 63:e202404979. [PMID: 38745374 DOI: 10.1002/anie.202404979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 04/23/2024] [Accepted: 05/14/2024] [Indexed: 05/16/2024]
Abstract
The control of noncarbon stereogenic centers is of profound importance owing to their enormous interest in bioactive compounds and chiral catalyst or ligand design for enantioselective synthesis. Despite various elegant approaches have been achieved for construction of S-, P-, Si- and B-stereocenters over the past decades, the catalyst-controlled strategies to govern the formation of N-stereogenic compounds have garnered less attention. Here, we disclose the first organocatalytic approach for efficient access to a wide range of nitrogen-stereogenic compounds through a desymmetrization approach. Intriguingly, the pro-chiral remote diols, which are previously not well addressed with enantiocontrol, are well differentiated by potent chiral carbene-bound acyl azolium intermediates. Preliminary studies shed insights on the critical importance of the ionic hydrogen bond (IHB) formed between the dimer aggregate of diols to afford the chiral N-oxide products that feature a tetrahedral nitrogen as the sole stereogenic element with good yields and excellent enantioselectivities. Notably, the chiral N-oxide products could offer an attractive strategy for chiral ligand design and discovery of potential antibacterial agrochemicals.
Collapse
Grants
- National Natural Science Fund for Excellent Young Scientists Fund Program (Overseas)-YQHW
- the starting grant of Guizhou University [(2022)47)]
- National Natural Science Foundation of China (21732002, 22061007, 22071036, and 22207022)
- Frontiers Science Center for Asymmetric Synthesis and Medicinal Molecules
- Department of Education, Science and Technology Department of Guizhou Province [Qiankehe-jichu-ZK[2022]zhongdian024]
- Program of Introducing Talents of Discipline to Universities of China (111 Program, D20023) at Guizhou University
- Singapore National Research Foundation under its NRF Investigatorship (NRF-NRFI2016-06) and Competitive Research Program (NRF-CRP22-2019-0002)
- Ministry of Education, Singapore, under its MOE AcRF Tier 1 Award (RG7/20, RG70/21), MOE AcRF Tier 2 (MOE2019-T2-2-117)
- a Chair Professorship Grant, and Nanyang Technological University
- (2022)47 starting grant of Guizhou University
- 21732002 National Natural Science Foundation of China
- 22061007 National Natural Science Foundation of China
- 22071036 National Natural Science Foundation of China
- 22207022 National Natural Science Foundation of China
- Qiankehe-jichu-ZK[2022]zhongdian024 Department of Education, Science and Technology Department of Guizhou Province
- Qiankehejichu-ZK[2024]yiban030 Department of Education, Science and Technology Department of Guizhou Province
- NRF-NRFI2016-06 Singapore National Research Foundation under its NRF Investigatorship and Competitive Research Program
- NRF-CRP22-2019-0002 Singapore National Research Foundation under its NRF Investigatorship and Competitive Research Program
- RG7/20, RG70/21 Ministry of Education, Singapore, under its MOE AcRF Tier 1 Award, MOE AcRF Tier 2
- MOE2019-T2-2-117 Ministry of Education, Singapore, under its MOE AcRF Tier 1 Award, MOE AcRF Tier 2
- Chair Professorship Grant, and Nanyang Technological University
- C210812008 Agency for Science, Technology and Research (A*STAR) under its Career Development Fund
- M22K3c0091 Manufacturing, TradeConnectivity (MTC) Young Individual Research Grants.
Collapse
Affiliation(s)
- Zhongfu Luo
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Minghong Liao
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Wei Li
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Sha Zhao
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Kun Tang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Pengcheng Zheng
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Yonggui Robin Chi
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
- School of Chemistry, Chemical Engineering, and Biotechnology, Nanyang Technological University, Singapore, 637371, Singapore
| | - Xinglong Zhang
- Institute of High Performance Computing (IHPC), A*STAR, Singapore, 138632, Singapore
| | - Xingxing Wu
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| |
Collapse
|
2
|
Yang Q, Huang S, Yin L, Wang Z, Chen X, Huang C. NBS-Promoted Synthesis of Thiocyanated Aminomaleimides and Site-Selective Intramolecular Cyclization Access to 1,4-Benzothiazepines via S-CN Bond Cleavage. J Org Chem 2024; 89:5266-5276. [PMID: 38592168 DOI: 10.1021/acs.joc.3c02607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/10/2024]
Abstract
A transition metal-free concise and efficient protocol for the synthesis of thiocyanated aminomaleimides and benzo[e][1,4]thiazepine derivatives has been developed. The method involves an initial α-C-H thiocyanation of aminomaleimides with KSCN and TEMPO-mediated tandem S-CN bond cleavage/intramolecular cyclization substitution processes, which enables the formation of seven-membered S/N-heterocycles. This synthetic strategy provides a reliable method for the synthesis of biologically interesting benzo[e][1,4]thiazepine derivatives by using KSCN as sulfur sources as well as expands the application of enaminones thiocyanation reactions in heterocycles synthesis.
Collapse
Affiliation(s)
- Qi Yang
- National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, School of Chemistry and Environment, Yunnan Minzu University, Kunming 650500, P.R. China
- School of Chemistry and Resource Engineering, Honghe University, Mengzi 661199, P.R. China
| | - Shuntao Huang
- National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, School of Chemistry and Environment, Yunnan Minzu University, Kunming 650500, P.R. China
| | - Lu Yin
- National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, School of Chemistry and Environment, Yunnan Minzu University, Kunming 650500, P.R. China
| | - Zhuoyu Wang
- National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, School of Chemistry and Environment, Yunnan Minzu University, Kunming 650500, P.R. China
| | - Xuebing Chen
- School of Chemistry and Resource Engineering, Honghe University, Mengzi 661199, P.R. China
| | - Chao Huang
- National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, School of Chemistry and Environment, Yunnan Minzu University, Kunming 650500, P.R. China
| |
Collapse
|
3
|
Yuan D, Goodfellow AS, Kasten K, Duan Z, Kang T, Cordes DB, McKay AP, Bühl M, Boyce GR, Smith AD. Understanding divergent substrate stereoselectivity in the isothiourea-catalysed conjugate addition of cyclic α-substituted β-ketoesters to α,β-unsaturated aryl esters. Chem Sci 2023; 14:14146-14156. [PMID: 38098722 PMCID: PMC10717594 DOI: 10.1039/d3sc05470e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Accepted: 11/20/2023] [Indexed: 12/17/2023] Open
Abstract
The development of enantioselective synthetic methods capable of generating vicinal stereogenic centres, where one is tetrasubstituted (such as either an all-carbon quaternary centre or where one or more substituents are heteroatoms), is a recognised synthetic challenge. Herein, the enantioselective conjugate addition of a range of carbo- and heterocyclic α-substituted β-ketoesters to α,β-unsaturated aryl esters using the isothiourea HyperBTM as a Lewis base catalyst is demonstrated. Notably, divergent diastereoselectivity is observed through the use of either cyclopentanone-derived or indanone-derived substituted β-ketoesters with both generating the desired stereodefined products with high selectivity (>95 : 5 dr, up to 99 : 1 er). The scope and limitations of these processes are demonstrated, alongside application on gram scale. The origin of the divergent substrate selectivity has been probed through the use of DFT-analysis, with preferential orientation driven by dual stabilising CH⋯O interactions. The importance of solvation with strongly polar transition-states is highlighted and the SMD solvation model is demonstrated to capture solvation effects reliably.
Collapse
Affiliation(s)
- Ding Yuan
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
- School of Biological and Chemical Engineering, Panzhihua University Panzhihua 617000 China
| | - Alister S Goodfellow
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - Kevin Kasten
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - Zhuan Duan
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - Tengfei Kang
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - David B Cordes
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - Aidan P McKay
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - Michael Bühl
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - Gregory R Boyce
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
- Department of Chemistry and Physics, Florida Gulf Coast University Fort Myers Florida 33965 USA
- Department of Chemistry and Biochemistry, East Stroudsburg University East Stroudsburg Pennsylvania 18301 USA
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| |
Collapse
|
4
|
Guo F, Young JA, Perez MS, Hankerson HA, Chavez AM. Progress on the Cu-Catalyzed 1,4-Conjugate Addition to Thiochromones. Catalysts 2023; 13:713. [PMID: 37293477 PMCID: PMC10249614 DOI: 10.3390/catal13040713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023] Open
Abstract
Carbon-carbon bond formation is one of the most important tools in synthetic organic chemists' toolbox. It is a fundamental transformation that allows synthetic chemists to synthesize the carbon framework of complex molecules from inexpensive simple starting materials. Among the many synthetic methodologies developed for the construction of carbon-carbon bonds, organocopper reagents are one of the most reliable organometallic reagents for this purpose. The versatility of organocuprate reagents or the reactions catalyzed by organocopper reagents were demonstrated by their applications in a variety of synthetic transformations including the 1,4-conjugate addition reactions. Sulfur-containing heterocyclic compounds are a much less studied area compared to oxygen-containing heterocycles but have gained more and more attention in recent years due to their rich biological activities and widespread applications in pharmaceuticals, agrochemicals, and material science. This paper will provide a brief review on recent progress on the synthesis of an important class of sulfur-heterocycles-2-alkylthiochroman-4-ones and thioflavanones via the conjugate additions of Grignard reagents to thiochromones catalyzed by copper catalysts. Recent progress on the synthesis of 2-substituted thiochroman-4-ones via alkynylation and alkenylation of thiochromones will also be covered in this review.
Collapse
Affiliation(s)
- Fenghai Guo
- Department of Chemistry, Winston-Salem State University, 601 S. Martin Luther King Jr. Dr., Winston-Salem, NC 27110, USA
- Biomedical Research Infrastructure Center, Winston-Salem State University, Winston-Salem, NC 27110, USA
| | - Jayla A. Young
- Department of Chemistry, Winston-Salem State University, 601 S. Martin Luther King Jr. Dr., Winston-Salem, NC 27110, USA
| | - Mina S. Perez
- Department of Chemistry, Winston-Salem State University, 601 S. Martin Luther King Jr. Dr., Winston-Salem, NC 27110, USA
| | - Holden A. Hankerson
- Department of Chemistry, Winston-Salem State University, 601 S. Martin Luther King Jr. Dr., Winston-Salem, NC 27110, USA
| | - Alex M. Chavez
- Department of Chemistry, Winston-Salem State University, 601 S. Martin Luther King Jr. Dr., Winston-Salem, NC 27110, USA
| |
Collapse
|
5
|
Progress in organocatalytic asymmetric (4+3) cycloadditions for the enantioselective construction of seven-membered rings. Sci China Chem 2023. [DOI: 10.1007/s11426-022-1471-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
|
6
|
Farah AO, Garcia J, Borg C, Beng TK. Serendipitous synthesis of cross-conjugated dienes by cascade deconstructive esterification of thiomorpholinone-tethered alkenoic acids. RSC Adv 2023; 13:3181-3185. [PMID: 36756410 PMCID: PMC9868895 DOI: 10.1039/d2ra07916j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Accepted: 01/10/2023] [Indexed: 01/25/2023] Open
Abstract
Functionalized 1,3-dienes are ubiquitous structural motifs in biologically pertinent molecules. They are frequently employed as precursors for a broad range of chemical transformations, including Diels-Alder reactions. The stereoselective construction of highly decorated 1,3-dienes therefore represents an important research objective. Medicinal chemists are becoming increasingly interested in synthetic methodologies that not only achieve expedient construction and peripheral editing of heterocycles, but also seek to modify their core framework in order to achieve skeletal remodeling. In a succinct manifestation of this 'scaffold hopping' concept, we herein describe a cascade reaction, which converts thiomorpholinone-tethered alkenoic acids to 1,1-disubstituted amino-1,3-dienes. This domino process involves esterification of the acid, base-assisted ring-opening, and concomitant 1,2-migration of the α-amino alkenyl group. Several control experiments have revealed that the alkenyl substituent is necessary for deconstruction to occur. Inherently more activated N-aryl-substituted thiomorpholinone acids react significantly faster than their less activated N-alkyl congeners.
Collapse
Affiliation(s)
- Abdikani Omar Farah
- Department of Chemistry, Central Washington University Ellensburg WA 98926 USA
| | - Jorge Garcia
- Department of Chemistry, Central Washington University Ellensburg WA 98926 USA
| | - Claire Borg
- Department of Chemistry, Central Washington University Ellensburg WA 98926 USA
| | - Timothy K. Beng
- Department of Chemistry, Central Washington UniversityEllensburgWA 98926USA
| |
Collapse
|
7
|
Niu C, Du DM. Recent Advances in Organocatalyzed Asymmetric sulfa-Michael Addition Triggered Cascade Reactions. CHEM REC 2023:e202200258. [PMID: 36594608 DOI: 10.1002/tcr.202200258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 12/14/2022] [Indexed: 01/04/2023]
Abstract
The sulfa-Michael addition reaction is a crucial subset of the Michael addition reaction, and aroused the interest of numerous synthetic biologists and chemists. In particular, sulfa-Michael addition triggered cascade reaction has developed quickly in recent years because it offers an efficient method to construct C-S bonds and other bonds in one approach, which is widely applicable for building chiral pharmaceuticals, their intermediates, and natural compounds. This review emphasizes the recent advancements in sulfa-Michael addition-triggered cascade reactions for the stereoselective synthesis of sulfur-containing compounds, including sulfa-Michael/aldol, sulfa-Michael/Henry, sulfa-Michael/Michael, sulfa-Michael/Mannich and some sulfa-Michael triggered multi-step processes. Moreover, some reaction mechanisms and derivatization experiments are introduced appropriately.
Collapse
Affiliation(s)
- Cheng Niu
- Key Laboratory of Medical Molecule Science & Pharmaceutics Engineering (Ministry of Industry and Information Technology), School of Chemistry and Chemical Engineering, Beijing Institute of Technology, No. 5 Zhongguancun South Street, Beijing, 100081, People's Republic of China
| | - Da-Ming Du
- Key Laboratory of Medical Molecule Science & Pharmaceutics Engineering (Ministry of Industry and Information Technology), School of Chemistry and Chemical Engineering, Beijing Institute of Technology, No. 5 Zhongguancun South Street, Beijing, 100081, People's Republic of China
| |
Collapse
|
8
|
Chalcogen bond-guided conformational isomerization enables catalytic dynamic kinetic resolution of sulfoxides. Nat Commun 2022; 13:4793. [PMID: 35970848 PMCID: PMC9378665 DOI: 10.1038/s41467-022-32428-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 08/01/2022] [Indexed: 11/29/2022] Open
Abstract
Conformational isomerization can be guided by weak interactions such as chalcogen bonding (ChB) interactions. Here we report a catalytic strategy for asymmetric access to chiral sulfoxides by employing conformational isomerization and chalcogen bonding interactions. The reaction involves a sulfoxide bearing two aldehyde moieties as the substrate that, according to structural analysis and DFT calculations, exists as a racemic mixture due to the presence of an intramolecular chalcogen bond. This chalcogen bond formed between aldehyde (oxygen atom) and sulfoxide (sulfur atom), induces a conformational locking effect, thus making the symmetric sulfoxide as a racemate. In the presence of N–heterocyclic carbene (NHC) as catalyst, the aldehyde moiety activated by the chalcogen bond selectively reacts with an alcohol to afford the corresponding chiral sulfoxide products with excellent optical purities. This reaction involves a dynamic kinetic resolution (DKR) process enabled by conformational locking and facile isomerization by chalcogen bonding interactions. Conformational isomerization of organic molecules can be guided by noncovalent interactions. Here, the authors report the synthesis of chiral sulfoxides catalyzed by N-heterocyclic carbenes; intramolecular chalcogen bonding interactions are key for conformational locking.
Collapse
|
9
|
Hansen ME, Yasmin SO, Wolfrum S, Carreira EM. Total Synthesis of Mutanobactins A, B from the Human Microbiome: Macrocyclization and Thiazepanone Assembly in a Single Step. Angew Chem Int Ed Engl 2022; 61:e202203051. [PMID: 35593892 PMCID: PMC9400992 DOI: 10.1002/anie.202203051] [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] [Received: 02/25/2022] [Indexed: 11/30/2022]
Abstract
We report the first total syntheses of tricyclic mutanobactins A and B, lipopeptides incorporating a thiazepanone, isolated from Streptococcus mutans, a member of the human oral microbiome. A rapid, solid‐phase peptide synthesis (SPPS) based route delivers these natural products from a cascade of cyclization reactions. This versatile process was also employed in a streamlined synthesis of mutanobactin D. Additionally, we provide an independent synthesis of a truncated mutanobactin A analog, utilizing a novel thiazepanone amino acid building block.
Collapse
Affiliation(s)
- Moritz E. Hansen
- Laboratorium für Organische Chemie ETH Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Samuel O. Yasmin
- Laboratorium für Organische Chemie ETH Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Susanne Wolfrum
- Laboratorium für Organische Chemie ETH Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Erick M. Carreira
- Laboratorium für Organische Chemie ETH Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| |
Collapse
|
10
|
Yoshino T. Enantioselective C–H Functionalization Using High-Valent Group 9 Metal Catalysts. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2022. [DOI: 10.1246/bcsj.20220168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tatsuhiko Yoshino
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo 060-0812
- Global Station for Biosurfaces and Drug Discovery, Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo 060-0812
| |
Collapse
|
11
|
Organocatalysis in Synthetic Heterocyclic Chemistry. HETEROCYCLES 2022. [DOI: 10.1002/9783527832002.ch4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
12
|
Hansen ME, Yasmin SO, Wolfrum S, Carreira EM. Total Synthesis of Mutanobactins A, B from the Human Microbiome: Macrocyclization and Thiazepanone Assembly in a Single Step. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202203051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Moritz E. Hansen
- Laboratorium für Organische Chemie ETH Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Samuel O. Yasmin
- Laboratorium für Organische Chemie ETH Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Susanne Wolfrum
- Laboratorium für Organische Chemie ETH Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Erick M. Carreira
- Laboratorium für Organische Chemie ETH Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| |
Collapse
|
13
|
Kurihara T, Kojima M, Yoshino T, Matsunaga S. Achiral Cp*Rh(III)/Chiral Lewis Base Cooperative Catalysis for Enantioselective Cyclization via C–H Activation. J Am Chem Soc 2022; 144:7058-7065. [DOI: 10.1021/jacs.2c01223] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Takumaru Kurihara
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Masahiro Kojima
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Tatsuhiko Yoshino
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
- Global Station for Biosurfaces and Drug Discovery, Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo 060-0812, Japan
| | - Shigeki Matsunaga
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
- Global Station for Biosurfaces and Drug Discovery, Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo 060-0812, Japan
| |
Collapse
|
14
|
Beng TK, Sax M, Borg C. Serendipitous synthesis of 2-alkenyl- and 2-aryl-4-thiazolidinones using dithiodiglycolic anhydride. NEW J CHEM 2022. [DOI: 10.1039/d2nj03719j] [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
Dithiodiglycolic anhydride undergoes an efficient formal cycloaddition with imines to afford functionalized 4-thiazolidinones, without complications arising from the anhydride-imine reaction or the sulfa-Michael reaction (in the case of 1,3-azadienes).
Collapse
Affiliation(s)
- Timothy K. Beng
- Department of Chemistry, Central Washington University, Ellensburg, WA 98926, USA
| | - Mckenna Sax
- Department of Chemistry, Central Washington University, Ellensburg, WA 98926, USA
| | - Claire Borg
- Department of Chemistry, Central Washington University, Ellensburg, WA 98926, USA
| |
Collapse
|
15
|
Zhang L, Fang L, Huang H, Wang C, Gao F, Wang Z. Synthesis of Benzo[ e][1,4]thiazepines by Base-Induced Formal [4+3] Annulation Reaction of Aza- o-quinone Methides and Pyridinium 1,4-Zwitterionic Thiolates. J Org Chem 2021; 86:18156-18163. [PMID: 34866383 DOI: 10.1021/acs.joc.1c02433] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The base-induced formal [4+3] annulation reaction of in situ-formed aza-o-quinone methides and pyridinium 1,4-zwitterionic thiolates is reported. This protocol provides a novel and reliable method for the synthesis of biologically interesting benzo[e][1,4]thiazepine derivatives in synthetically useful yields. In addition, postsynthetic modification results in the formation of its sulfoxide and sulfone derivatives.
Collapse
Affiliation(s)
- Lijie Zhang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, P. R. China
| | - Ling Fang
- College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, P. R. China
| | - Hao Huang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, P. R. China
| | - Chaofan Wang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, P. R. China
| | - Fang Gao
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, P. R. China
| | - Zhiyong Wang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, P. R. China
| |
Collapse
|
16
|
Wang C, Liu X, Wang X, Cui H, Ma Z, Ding D, Liu J, Meng L, Chen Y. Synthesis of Functionalized 4,1‐Benzothiazepines via a [4+3] Annulation between Aza‐
o‐
Quinone Methides and Pyridinium 1,4‐Zwitterionic Thiolates. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101034] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Chuan‐Chuan Wang
- Faculty of Science Henan University of Animal Husbandry and Economy No. 146 Yingcai Street Zhengzhou 450044 Henan People's Republic of China
| | - Xue‐Hua Liu
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education of China Zhengzhou University 100 Science Avenue Zhengzhou 450001 Henan People's Republic of China
| | - Xin‐Lu Wang
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education of China Zhengzhou University 100 Science Avenue Zhengzhou 450001 Henan People's Republic of China
| | - Hua‐Peng Cui
- Zhengzhou Tobacco Research Institute of CNTC No. 2 Fengyang Street Zhengzhou 450001 Henan People's Republic of China
| | - Zhi‐Wei Ma
- Faculty of Science Henan University of Animal Husbandry and Economy No. 146 Yingcai Street Zhengzhou 450044 Henan People's Republic of China
| | - Degang Ding
- Faculty of Science Henan University of Animal Husbandry and Economy No. 146 Yingcai Street Zhengzhou 450044 Henan People's Republic of China
| | - Jun‐Tao Liu
- Faculty of Science Henan University of Animal Husbandry and Economy No. 146 Yingcai Street Zhengzhou 450044 Henan People's Republic of China
| | - Lei Meng
- Henan Institute of Veterinary Drug and Feed Control No. 91 Jingsan Road Zhengzhou 450008 Henan People's Republic of China
| | - Ya‐Jing Chen
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education of China Zhengzhou University 100 Science Avenue Zhengzhou 450001 Henan People's Republic of China
| |
Collapse
|
17
|
Bitai J, Westwood MT, Smith AD. α,β-Unsaturated acyl ammonium species as reactive intermediates in organocatalysis: an update. Org Biomol Chem 2021; 19:2366-2384. [PMID: 33650626 DOI: 10.1039/d0ob02208j] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
α,β-Unsaturated acyl ammonium species are versatile intermediates that have been applied in a variety of transformations including Michael additions, domino reactions and cycloadditions. Many of these transformations are promoted by chiral Lewis base catalysts, enabling the rapid generation of molecular complexity with high stereochemical control. This review highlights recent developments in the generation and application of α,β-unsaturated acyl ammonium intermediates reported since a previous review of this area in 2016. Particular emphasis will be placed on reports providing mechanistic insight into catalytic transformations and observed selectivities. A perspective on current challenges and potential future developments in the field of α,β-unsaturated acyl ammonium catalysis is also provided.
Collapse
Affiliation(s)
- Jacqueline Bitai
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, Fife, Scotland, KY16 9ST, UK.
| | | | | |
Collapse
|
18
|
Meninno S, Franco F, Benaglia M, Lattanzi A. Pyrazoleamides in Catalytic Asymmetric Reactions: Recent Advances. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Sara Meninno
- Dipartimento di Chimica e Biologia “A. Zambelli” Università di Salerno Via Giovanni Paolo II 132 84084 Fisciano Italy
| | - Francesca Franco
- Dipartimento di Chimica e Biologia “A. Zambelli” Università di Salerno Via Giovanni Paolo II 132 84084 Fisciano Italy
| | - Maurizio Benaglia
- Dipartimento di Chimica Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
| | - Alessandra Lattanzi
- Dipartimento di Chimica e Biologia “A. Zambelli” Università di Salerno Via Giovanni Paolo II 132 84084 Fisciano Italy
| |
Collapse
|
19
|
Lam H, Lautens M, Abel-Snape X, Köllen MF. Recent Advances in Transition-Metal-Free (4+3)-Annulations. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/s-0040-1706023] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Abstract(4+3)-Annulations are incredibly versatile reactions which combine a 4-atom synthon and a 3-atom synthon to form both 7-membered carbocycles as well as heterocycles. We have previously reviewed transition-metal-catalyzed (4+3)-annulations. In this review, we will cover examples involving bases, NHCs, phosphines, Lewis and Brønsted acids as well as some rare examples of boronic acid catalysis and photocatalysis. In analogy to our previous review, we exclude annulations involving cyclic dienes like furan, pyrrole, cyclohexadiene or cyclopentadiene, as Chiu, Harmata, Fernándes and others have recently published reviews encompassing such substrates. We will however discuss the recent additions (2010–2020) to the literature on (4+3)-annulations involving other types of 4-atom-synthons.1 Introduction2 Bases3 Annulations Using N-Heterocyclic Carbenes3.1 N-Heterocyclic Carbenes (NHCs)3.2 N-Heterocyclic Carbenes and Base Dual-Activation4 Phosphines5 Acids5.1 Lewis Acids5.2 Brønsted Acids6 Boronic Acid Catalysis and Photocatalysis7 Conclusion
Collapse
Affiliation(s)
- Heather Lam
- Davenport Research Laboratories, Department of Chemistry, University of Toronto
| | - Mark Lautens
- Davenport Research Laboratories, Department of Chemistry, University of Toronto
| | - Xavier Abel-Snape
- Davenport Research Laboratories, Department of Chemistry, University of Toronto
| | - Martin F. Köllen
- Ludwig-Maximilians-Universität München, Department Chemie und Biochemie
| |
Collapse
|
20
|
Asano K. Multipoint Recognition of Molecular Conformations with Organocatalysts for Asymmetric Synthetic Reactions. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200343] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Keisuke Asano
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| |
Collapse
|
21
|
Gurbanov AV, Kuznetsov ML, Mahmudov KT, Pombeiro AJL, Resnati G. Resonance Assisted Chalcogen Bonding as a New Synthon in the Design of Dyes. Chemistry 2020; 26:14833-14837. [PMID: 32567710 DOI: 10.1002/chem.202002518] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Indexed: 12/31/2022]
Abstract
Intramolecular chalcogen bonding in arylhydrazones of sulfamethizole is strengthened by conjugation in the π-system of a noncovalent five-membered ring. The S⋅⋅⋅O distance in the sulfamethizole moiety of these compounds ranges from 2.698(3) to 2.806(15) Å, which indicates its strong dependence on the attached arylhydrazone fragments. Information on the nature of the intramolecular chalcogen bond was afforded by DFT calculations.
Collapse
Affiliation(s)
- Atash V Gurbanov
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal.,Department of Chemistry, Baku State University, Z. Xalilov Str. 23, Az, 1148, Baku, Azerbaijan
| | - Maxim L Kuznetsov
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
| | - Kamran T Mahmudov
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal.,Department of Chemistry, Baku State University, Z. Xalilov Str. 23, Az, 1148, Baku, Azerbaijan
| | - Armando J L Pombeiro
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
| | - Giuseppe Resnati
- Laboratory of Nanostructured Fluorinated Materials (NFMLab), Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Via L. Mancinelli 7, 20131, Milano, Italy
| |
Collapse
|
22
|
Biswas A, Mondal H, Maji MS. Synthesis of Heterocycles by isothiourea organocatalysis. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.4119] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Anup Biswas
- Department of Chemistry Hooghly Women's College Hooghly India
| | - Haripriyo Mondal
- Department of Chemistry Indian Institute of Technology Kharagpur India
| | - Modhu S. Maji
- Department of Chemistry Indian Institute of Technology Kharagpur India
| |
Collapse
|
23
|
Devi V, Singh G, Monga V. Recent advances in the synthetic chemistry of 1,5
‐benzothiazepines
: A minireview. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.4062] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Varsha Devi
- Department of Pharmaceutical ChemistryISF College of Pharmacy Moga Punjab India
| | - Gurpreet Singh
- Department of Pharmaceutical ChemistryISF College of Pharmacy Moga Punjab India
| | - Vikramdeep Monga
- Department of Pharmaceutical ChemistryISF College of Pharmacy Moga Punjab India
| |
Collapse
|
24
|
Li D, Wang S, Ge S, Dong S, Feng X. Asymmetric Synthesis of Axially Chiral Anilides via Organocatalytic Atroposelective N-Acylation. Org Lett 2020; 22:5331-5336. [DOI: 10.1021/acs.orglett.0c01581] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Dawei Li
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Sijing Wang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Shulin Ge
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Shunxi Dong
- 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
|
25
|
Wang H, Gu S, Yan Q, Ding L, Chen FE. Asymmetric catalysis in synthetic strategies for chiral benzothiazepines. GREEN SYNTHESIS AND CATALYSIS 2020. [DOI: 10.1016/j.gresc.2020.05.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
|
26
|
Pandey AK, Kirberger SE, Johnson JA, Kimbrough JR, Partridge DKD, Pomerantz WCK. Efficient Synthesis of 1,4-Thiazepanones and 1,4-Thiazepanes as 3D Fragments for Screening Libraries. Org Lett 2020; 22:3946-3950. [PMID: 32347732 PMCID: PMC8324318 DOI: 10.1021/acs.orglett.0c01230] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
1,4-Thiazepanes and 1,4-thiazepanones represent seven-membered ring systems with highly 3D character and are currently underrepresented in fragment screening libraries. A nuclear magnetic resonance (NMR) fragment screen identified 1,4-acylthiazepanes as new BET (bromodomain and extraterminal domain) bromodomain ligands; however, an efficient and readily diversified synthesis for library development has not been reported. Here we report a one-pot synthesis using α,β-unsaturated esters and 1,2-amino thiols to form 1,4-thiazepanones as precursors to 1,4-thiazepanes with high 3D character. This reaction proceeds in reasonable time (0.5-3 h) and in good yield and tolerates a broad scope of α,β-unsaturated esters. Several 1,4-thiazepanes were synthesized by a two-step transformation and were characterized as new BET bromodomain ligands using protein-observed 19F NMR. This synthesis should provide ready access to diverse 3D fragments for screening libraries.
Collapse
Affiliation(s)
- Anil K Pandey
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Steven E Kirberger
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Jorden A Johnson
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Jennifer R Kimbrough
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Danika K D Partridge
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - William C K Pomerantz
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| |
Collapse
|
27
|
Hayama N, Kobayashi Y, Sekimoto E, Miyazaki A, Inamoto K, Kimachi T, Takemoto Y. A solvent-dependent chirality-switchable thia-Michael addition to α,β-unsaturated carboxylic acids using a chiral multifunctional thiourea catalyst. Chem Sci 2020; 11:5572-5576. [PMID: 32874501 PMCID: PMC7444369 DOI: 10.1039/d0sc01729a] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 05/14/2020] [Indexed: 01/19/2023] Open
Abstract
An asymmetric thia-Michael addition of arylthiols to α,β-unsaturated carboxylic acids using a thiourea catalyst that bears arylboronic acid and tertiary amine moieties is reported.
An asymmetric thia-Michael addition of arylthiols to α,β-unsaturated carboxylic acids using a thiourea catalyst that bears arylboronic acid and tertiary amine moieties is reported. Both enantiomers of the Michael adducts can be obtained in high enantioselectivity and good yield merely by changing the solvent. The origin of the chirality switch in the products was examined in each solvent via spectroscopic analyses.
Collapse
Affiliation(s)
- Noboru Hayama
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku , Kyoto 606-8501 , Japan . .,School of Pharmacy and Pharmaceutical Sciences , Mukogawa Women's University , 11-68, 9-Bancho, Koshien , Nishinomiya , Hyogo 663-8179 , Japan
| | - Yusuke Kobayashi
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku , Kyoto 606-8501 , Japan .
| | - Eriko Sekimoto
- School of Pharmacy and Pharmaceutical Sciences , Mukogawa Women's University , 11-68, 9-Bancho, Koshien , Nishinomiya , Hyogo 663-8179 , Japan
| | - Anna Miyazaki
- School of Pharmacy and Pharmaceutical Sciences , Mukogawa Women's University , 11-68, 9-Bancho, Koshien , Nishinomiya , Hyogo 663-8179 , Japan
| | - Kiyofumi Inamoto
- School of Pharmacy and Pharmaceutical Sciences , Mukogawa Women's University , 11-68, 9-Bancho, Koshien , Nishinomiya , Hyogo 663-8179 , Japan
| | - Tetsutaro Kimachi
- School of Pharmacy and Pharmaceutical Sciences , Mukogawa Women's University , 11-68, 9-Bancho, Koshien , Nishinomiya , Hyogo 663-8179 , Japan
| | - Yoshiji Takemoto
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku , Kyoto 606-8501 , Japan .
| |
Collapse
|
28
|
Bellinger TJ, Harvin T, Pickens-Flynn T, Austin N, Whitaker SH, Tang Yuk Tutein MLC, Hukins DT, Deese N, Guo F. Conjugate Addition of Grignard Reagents to Thiochromones Catalyzed by Copper Salts: A Unified Approach to Both 2-Alkylthiochroman-4-One and Thioflavanone. Molecules 2020; 25:E2128. [PMID: 32370080 PMCID: PMC7248974 DOI: 10.3390/molecules25092128] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 04/28/2020] [Accepted: 04/29/2020] [Indexed: 11/16/2022] Open
Abstract
Grignard reagents undergo conjugate addition to thiochromones catalyzed by copper salts to afford 2-substituted-thiochroman-4-ones, both 2-alkylthiochroman-4-ones and thioflavanones (2-arylthiochroman-4-ones), in good yields with trimethylsilyl chloride (TMSCl) as an additive. The best yields of 1,4-adducts can be attained with CuCN∙2LiCl as the copper source. Excellent yields of 2-alkyl-substituted thiochroman-4-ones and thioflavanones (2-aryl substituted) are attained with a broad range of Grignard reagents. This approach works well with both alkyl and aromatic Grignard reagents, thus providing a unified synthetic approach to privileged 2-substituted thiochroman-4-ones and a potential valuable precursor for further synthetic applications towards many pharmaceutically active molecules. The use of commercially available and/or readily prepared Grignard reagents will expedite the synthesis of a large library of both 2-alkyl substituted thiochroman-4-ones and thioflavanones for additional synthetic applications.
Collapse
Affiliation(s)
- Tania J. Bellinger
- Department of Chemistry, Winston Salem State University, 601 S. Martin Luther King Jr. Dr., Winston Salem, NC 27110, USA; (T.J.B.); (T.H.); (T.P.-F.); (N.A.); (S.H.W.); (M.L.C.T.Y.T.); (D.T.H.); (N.D.)
| | - Teavian Harvin
- Department of Chemistry, Winston Salem State University, 601 S. Martin Luther King Jr. Dr., Winston Salem, NC 27110, USA; (T.J.B.); (T.H.); (T.P.-F.); (N.A.); (S.H.W.); (M.L.C.T.Y.T.); (D.T.H.); (N.D.)
| | - Ti’Bran Pickens-Flynn
- Department of Chemistry, Winston Salem State University, 601 S. Martin Luther King Jr. Dr., Winston Salem, NC 27110, USA; (T.J.B.); (T.H.); (T.P.-F.); (N.A.); (S.H.W.); (M.L.C.T.Y.T.); (D.T.H.); (N.D.)
| | - Nataleigh Austin
- Department of Chemistry, Winston Salem State University, 601 S. Martin Luther King Jr. Dr., Winston Salem, NC 27110, USA; (T.J.B.); (T.H.); (T.P.-F.); (N.A.); (S.H.W.); (M.L.C.T.Y.T.); (D.T.H.); (N.D.)
| | - Samuel H. Whitaker
- Department of Chemistry, Winston Salem State University, 601 S. Martin Luther King Jr. Dr., Winston Salem, NC 27110, USA; (T.J.B.); (T.H.); (T.P.-F.); (N.A.); (S.H.W.); (M.L.C.T.Y.T.); (D.T.H.); (N.D.)
| | - Mai Ling C. Tang Yuk Tutein
- Department of Chemistry, Winston Salem State University, 601 S. Martin Luther King Jr. Dr., Winston Salem, NC 27110, USA; (T.J.B.); (T.H.); (T.P.-F.); (N.A.); (S.H.W.); (M.L.C.T.Y.T.); (D.T.H.); (N.D.)
| | - Dabria T. Hukins
- Department of Chemistry, Winston Salem State University, 601 S. Martin Luther King Jr. Dr., Winston Salem, NC 27110, USA; (T.J.B.); (T.H.); (T.P.-F.); (N.A.); (S.H.W.); (M.L.C.T.Y.T.); (D.T.H.); (N.D.)
| | - Nichele Deese
- Department of Chemistry, Winston Salem State University, 601 S. Martin Luther King Jr. Dr., Winston Salem, NC 27110, USA; (T.J.B.); (T.H.); (T.P.-F.); (N.A.); (S.H.W.); (M.L.C.T.Y.T.); (D.T.H.); (N.D.)
| | - Fenghai Guo
- Department of Chemistry, Winston Salem State University, 601 S. Martin Luther King Jr. Dr., Winston Salem, NC 27110, USA; (T.J.B.); (T.H.); (T.P.-F.); (N.A.); (S.H.W.); (M.L.C.T.Y.T.); (D.T.H.); (N.D.)
- Biomedical Research Infrastructure Center, Winston Salem State University, Winston Salem, NC 27110, USA
| |
Collapse
|
29
|
Zhang YC, Geng RL, Song J, Gong LZ. Isothiourea and Brønsted Acid Cooperative Catalysis: Enantioselective Construction of Dihydropyridinones. Org Lett 2020; 22:2261-2265. [DOI: 10.1021/acs.orglett.0c00461] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yu-Chen Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Rui-Long Geng
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Jin Song
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Liu-Zhu Gong
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| |
Collapse
|
30
|
Meng L, Ngai KY, Chang X, Lin Z, Wang J. Cu(I)-Catalyzed Enantioselective Alkynylation of Thiochromones. Org Lett 2020; 22:1155-1159. [PMID: 31961693 DOI: 10.1021/acs.orglett.0c00005] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A highly efficient asymmetric synthesis of chiral thiochromanones is developed via Cu(I)/phosphoramidite catalyzed asymmetric alkynylation of thiochromones under mild reaction conditions. The catalyst system is tolerant of various thiochromone precursors and terminal alkynes. The established asymmetric transformation provides different enatiomeric-enriched thiochromanones with more molecular complexity and enables access to chiral thioflavanones, a subgroup of flavonoid by further functionalization.
Collapse
Affiliation(s)
- Ling Meng
- Shenzhen Grubbs Institute and Department of Chemistry , Southern University of Science and Technology , Shenzhen 518055 , China.,Department of Chemistry , The Hong Kong University of Science & Technology , Clear Water Bay, Kowloon , Hong Kong
| | - Ka Yan Ngai
- Shenzhen Grubbs Institute and Department of Chemistry , Southern University of Science and Technology , Shenzhen 518055 , China
| | - Xiaoyong Chang
- Shenzhen Grubbs Institute and Department of Chemistry , Southern University of Science and Technology , Shenzhen 518055 , China
| | - Zhenyang Lin
- Department of Chemistry , The Hong Kong University of Science & Technology , Clear Water Bay, Kowloon , Hong Kong
| | - Jun Wang
- Shenzhen Grubbs Institute and Department of Chemistry , Southern University of Science and Technology , Shenzhen 518055 , China
| |
Collapse
|
31
|
Yin C, Yang T, Pan Y, Wen J, Zhang X. Rh-Catalyzed Asymmetric Hydrogenation of Unsaturated Medium-Ring NH Lactams: Highly Enantioselective Synthesis of N-Unprotected 2,3-Dihydro-1,5-benzothiazepinones. Org Lett 2020; 22:920-923. [PMID: 31916777 DOI: 10.1021/acs.orglett.9b04478] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A straightforward method to prepare 1,5-benzothiazepines was reported. Catalyzed by a Rh/Zhaophos complex, unsaturated cyclic NH lactams with a medium-size ring were hydrogenated smoothly, giving remarkably high enantioselectivities. The sulfur atom in the substrates did not bring an inhibition which was observed with commercially available bisphosphine ligands. This method was successfully applied in the scale-up synthesis of (R)-(-)-thiazesim.
Collapse
Affiliation(s)
- Congcong Yin
- Shenzhen Grubbs Institute and Department of Chemistry , Southern University of Science and Technology , Shenzhen , Guangdong 518055 , China
| | - Tao Yang
- Shenzhen Grubbs Institute and Department of Chemistry , Southern University of Science and Technology , Shenzhen , Guangdong 518055 , China
| | - Yingmin Pan
- Shenzhen Grubbs Institute and Department of Chemistry , Southern University of Science and Technology , Shenzhen , Guangdong 518055 , China
| | - Jialin Wen
- Shenzhen Grubbs Institute and Department of Chemistry , Southern University of Science and Technology , Shenzhen , Guangdong 518055 , China.,Academy for Advanced Interdisciplinary Studies , Southern University of Science and Technology , Shenzhen , Guangdong 518055 , China
| | - Xumu Zhang
- Shenzhen Grubbs Institute and Department of Chemistry , Southern University of Science and Technology , Shenzhen , Guangdong 518055 , China
| |
Collapse
|
32
|
Liu H, Slawin AMZ, Smith AD. Isothiourea-Catalyzed Enantioselective Synthesis of Tetrahydro-α-carbolinones. Org Lett 2020; 22:1301-1305. [DOI: 10.1021/acs.orglett.9b04615] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Honglei Liu
- 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
|
33
|
Unravelling the Importance of H bonds, σ–hole and π–hole-Directed Intermolecular Interactions in Nature. J Indian Inst Sci 2019. [DOI: 10.1007/s41745-019-00144-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|
34
|
Liu C, Wu S, Xu J, Chen L, Zheng P, Chi YR. Carbene-Catalyzed Enantioselective Addition of Thioamides to Bromoenals for Access to Thiazinone Heterocycles. Org Lett 2019; 21:9493-9496. [PMID: 31742417 DOI: 10.1021/acs.orglett.9b03685] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A carbene-catalyzed reaction between α-bromoenals and thioamides was developed. Key steps include enantioselective 1,4-addition of thioamide sulfur atoms to α,β-unsaturated acyl azolium intermediate. Subsequent intramolecular annulation eventually affords thiazinone heterocycles with high optical purities. The introduction of Lewis acid additives such as Cu(OTf)2 to this NHC catalytic reaction could provide small but consistent improvements to reaction enantioselectivities.
Collapse
Affiliation(s)
- Changyi Liu
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education , Guizhou University , Huaxi District , Guiyang 550025 , China
| | - Shuquan Wu
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education , Guizhou University , Huaxi District , Guiyang 550025 , China
| | - Jun Xu
- Guizhou University of Traditional Chinese Medicine , Guiyang 550025 , China.,Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore
| | - Lingzhu Chen
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education , Guizhou University , Huaxi District , Guiyang 550025 , China
| | - Pengcheng Zheng
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education , Guizhou University , Huaxi District , Guiyang 550025 , China
| | - Yonggui Robin Chi
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education , Guizhou University , Huaxi District , Guiyang 550025 , China.,Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore
| |
Collapse
|
35
|
Bamberger J, Ostler F, Mancheño OG. Frontiers in Halogen and Chalcogen-Bond Donor Organocatalysis. ChemCatChem 2019; 11:5198-5211. [PMID: 31894187 PMCID: PMC6919929 DOI: 10.1002/cctc.201901215] [Citation(s) in RCA: 124] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Indexed: 01/01/2023]
Abstract
Non-covalent molecular interactions on the basis of halogen and chalcogen bonding represent a promising, powerful catalytic activation mode. However, these "unusual" non-covalent interactions are typically employed in the solid state and scarcely exploited in catalysis. In recent years, an increased interest in halogen and chalcogen bonding has been awaken, as they provide profound characteristics that make them an appealing alternative to the well-explored hydrogen bonding. Being particularly relevant in the binding of "soft" substrates, the similar strength to hydrogen bonding interactions and its higher directionality allows for solution-phase applications with halogen and chalcogen bonding as the key interaction. In this mini-review, the special features, state-of-the-art and key examples of these so-called σ-hole interactions in the field of organocatalysis are presented.
Collapse
Affiliation(s)
- Julia Bamberger
- Organic Chemistry InstituteMünster UniversityCorrensstraße 40MünsterD-48149Germany
| | - Florian Ostler
- Organic Chemistry InstituteMünster UniversityCorrensstraße 40MünsterD-48149Germany
| | - Olga García Mancheño
- Organic Chemistry InstituteMünster UniversityCorrensstraße 40MünsterD-48149Germany
| |
Collapse
|
36
|
Shu C, Liu H, Slawin AMZ, Carpenter-Warren C, Smith AD. Isothiourea-catalysed enantioselective Michael addition of N-heterocyclic pronucleophiles to α,β-unsaturated aryl esters. Chem Sci 2019; 11:241-247. [PMID: 34040717 PMCID: PMC8133005 DOI: 10.1039/c9sc04303a] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The isothiourea-catalysed enantioselective Michael addition of 3-aryloxindole and 4-substituted-dihydropyrazol-3-one pronucleophiles to α,β-unsaturated p-nitrophenyl esters is reported. This process generates products containing two contiguous stereocentres, one quaternary, in good yields and excellent enantioselectivities (>30 examples, up to > 95 : 5 dr and 99 : 1 er). This protocol harnesses the multifunctional ability of p-nitrophenoxide to promote effective catalysis. In contrast to previous methodologies using tertiary amine Lewis bases, in which the pronucleophile was used as the solvent, this work allows bespoke pronucleophiles to be used in stoichiometric quantities. The isothiourea-catalysed enantioselective Michael addition of 3-aryloxindole and 4-substituted-dihydropyrazol-3-one pronucleophiles to α,β-unsaturated p-nitrophenyl esters is reported.![]()
Collapse
Affiliation(s)
- Chang Shu
- EaStCHEM, School of Chemistry, University of St Andrews North Haugh, St Andrews Fife KY16 9ST UK
| | - Honglei Liu
- 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
| | - Cameron Carpenter-Warren
- 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
|
37
|
Li L, Ding D, Song J, Han Z, Gong L. Catalytic Generation of C1 Ammonium Enolates from Halides and CO for Asymmetric Cascade Reactions. Angew Chem Int Ed Engl 2019; 58:7647-7651. [DOI: 10.1002/anie.201901501] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Revised: 03/10/2019] [Indexed: 01/02/2023]
Affiliation(s)
- Lu‐Lu Li
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Du Ding
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Jin Song
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Zhi‐Yong Han
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Liu‐Zhu Gong
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
- Collaborative Innovation Center of Chemical Science, and Engineering Tianjin China
| |
Collapse
|
38
|
Li L, Ding D, Song J, Han Z, Gong L. Catalytic Generation of C1 Ammonium Enolates from Halides and CO for Asymmetric Cascade Reactions. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901501] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Lu‐Lu Li
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Du Ding
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Jin Song
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Zhi‐Yong Han
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Liu‐Zhu Gong
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
- Collaborative Innovation Center of Chemical Science, and Engineering Tianjin China
| |
Collapse
|
39
|
Huang Y, Li P, Dong XQ, Zhang X. Synthesis of chiral seven-membered β-substituted lactams via Rh-catalyzed asymmetric hydrogenation. Org Biomol Chem 2019; 16:8819-8823. [PMID: 30406248 DOI: 10.1039/c8ob02231c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rh/bisphosphine-thiourea ligand (ZhaoPhos)-catalyzed asymmetric hydrogenation of seven-membered β-substituted α,β-unsaturated lactams was successfully developed to prepare various chiral seven-membered β-substituted lactams with good to excellent results (up to >99% conversion, 99% yield, and >99% ee).
Collapse
Affiliation(s)
- Yi Huang
- Key Laboratory of Biomedical Polymers, Engineering Research Centre of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, P. R. China.
| | | | | | | |
Collapse
|
40
|
Zhou M, He E, Zhang L, Chen J, Zhang Z, Liu Y, Zhang W. Development of a new bicyclic imidazole nucleophilic organocatalyst for direct enantioselective C-acylation. Org Chem Front 2019. [DOI: 10.1039/c9qo01025d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A new chiral nucleophilic organocatalyst bearing a 5,6,7,8-tetrahydroimidazo[1,2-a]pyridine skeleton has been developed.
Collapse
Affiliation(s)
- Muxing Zhou
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs
- School of Pharmacy
- Shanghai Jiao Tong University
- Shanghai 200240
- China
| | - Ende He
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs
- School of Pharmacy
- Shanghai Jiao Tong University
- Shanghai 200240
- China
| | - Lu Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs
- School of Pharmacy
- Shanghai Jiao Tong University
- Shanghai 200240
- China
| | - Jianzhong Chen
- School of Chemistry and Chemical Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
- China
| | - Zhenfeng Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs
- School of Pharmacy
- Shanghai Jiao Tong University
- Shanghai 200240
- China
| | - Yangang Liu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs
- School of Pharmacy
- Shanghai Jiao Tong University
- Shanghai 200240
- China
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs
- School of Pharmacy
- Shanghai Jiao Tong University
- Shanghai 200240
- China
| |
Collapse
|
41
|
Vogel L, Wonner P, Huber SM. Chalcogen Bonding: An Overview. Angew Chem Int Ed Engl 2018; 58:1880-1891. [PMID: 30225899 DOI: 10.1002/anie.201809432] [Citation(s) in RCA: 344] [Impact Index Per Article: 57.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Indexed: 01/23/2023]
Abstract
In the last few decades, "unusual" noncovalent interactions like anion-π and halogen bonding have emerged as interesting alternatives to the ubiquitous hydrogen bonding in many research areas. This is also true, to a somewhat lesser extent, for chalcogen bonding, the noncovalent interaction involving Lewis acidic chalcogen centers. Herein, we aim to provide an overview on the use of chalcogen bonding in crystal engineering and in solution, with a focus on the recent developments concerning intermolecular chalcogen bonding in solution-phase applications. In the solid phase, chalcogen bonding has been used for the construction of nano-sized structures and the self-assembly of sophisticated self-complementary arrays. In solution, until very recently applications mostly focused on intramolecular interactions which stabilized the conformation of intermediates or reagents. In the last few years, intermolecular chalcogen bonding has increasingly also been exploited in solution, most notably in anion recognition and transport as well as in organic synthesis and organocatalysis.
Collapse
Affiliation(s)
- Lukas Vogel
- Faculty of Chemistry and Biochemistry, Ruhr-University Bochum, Universitätsstraße 150, 44801, Bochum, Germany
| | - Patrick Wonner
- Faculty of Chemistry and Biochemistry, Ruhr-University Bochum, Universitätsstraße 150, 44801, Bochum, Germany
| | - Stefan M Huber
- Faculty of Chemistry and Biochemistry, Ruhr-University Bochum, Universitätsstraße 150, 44801, Bochum, Germany
| |
Collapse
|
42
|
Affiliation(s)
- Lukas Vogel
- Fakultät für Chemie und Biochemie; Ruhr-Universität Bochum; Universitätsstraße 150 44801 Bochum Deutschland
| | - Patrick Wonner
- Fakultät für Chemie und Biochemie; Ruhr-Universität Bochum; Universitätsstraße 150 44801 Bochum Deutschland
| | - Stefan M. Huber
- Fakultät für Chemie und Biochemie; Ruhr-Universität Bochum; Universitätsstraße 150 44801 Bochum Deutschland
| |
Collapse
|
43
|
Enantioselective synthesis of indolo[2,3-b]-dihydrothiopyranones via [3+3] cycloaddition of chiral α,β-unsaturated acylammonium salts. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.09.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
44
|
Guo WS, Gong H, Zhang YA, Wen LR, Li M. Fast Construction of 1,3-Benzothiazepines by Direct Intramolecular Dehydrogenative C–S Bond Formation of Thioamides under Metal-Free Conditions. Org Lett 2018; 20:6394-6397. [DOI: 10.1021/acs.orglett.8b02697] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Wei-Si Guo
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Hao Gong
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Yan-An Zhang
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Li-Rong Wen
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Ming Li
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| |
Collapse
|
45
|
Meninno S, Quaratesi I, Volpe C, Mazzanti A, Lattanzi A. Catalytic enantioselective one-pot approach to cis- and trans-2,3-diaryl substituted 1,5-benzothiazepines. Org Biomol Chem 2018; 16:6923-6934. [PMID: 30226256 DOI: 10.1039/c8ob01988f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first enantioselective catalytic approach to cis- and trans-2,3-diaryl substituted 1,5-benzothiazepines has been conveniently developed in a one-pot fashion, starting from α,β-unsaturated acyl pyrazoles and 2-aminothiophenol. The organocatalytic two-step sulfa-Michael/lactamization sequence is promoted by a readily available bifunctional thiourea and p-toluenesulfonic acid, respectively. The protocol enables access to both N-unprotected cis- and trans-diastereoisomers in moderate to satisfactory overall yields (up to 84%) and good to excellent ee values (up to 99%). Mechanistic investigations helped to shed light on the regio- and stereoselective outcome of the process.
Collapse
Affiliation(s)
- Sara Meninno
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, Via Giovanni Paolo II 132, I-84084, Fisciano, Italy.
| | | | | | | | | |
Collapse
|
46
|
Zhang CL, Zhang ZF, Xia ZH, Han YF, Ye S. DBU-Mediated Construction of 1,3,5-Trisubstituted Benzenes via Annulation of α,β-Unsaturated Carboxylic Acids and α-Cyano-β-methylenones. J Org Chem 2018; 83:12507-12513. [PMID: 30247035 DOI: 10.1021/acs.joc.8b01740] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A DBU-mediated synthesis of 1,3,5-trisubstituted benzenes was developed via the [2 + 4] annulation of in situ activated α,β-unsaturated carboxylic acids and α-cyano-β-methylenones. The dual role of DBU as Brønsted base and nucleophilic Lewis base is the key for the success of the reaction.
Collapse
Affiliation(s)
- Chun-Lin Zhang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China
| | - Zhao-Fei Zhang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Zi-Hao Xia
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
| | - You-Feng Han
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Song Ye
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
| |
Collapse
|
47
|
Hayama N, Kuramoto R, Földes T, Nishibayashi K, Kobayashi Y, Pápai I, Takemoto Y. Mechanistic Insight into Asymmetric Hetero-Michael Addition of α,β-Unsaturated Carboxylic Acids Catalyzed by Multifunctional Thioureas. J Am Chem Soc 2018; 140:12216-12225. [PMID: 30215516 DOI: 10.1021/jacs.8b07511] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Carboxylic acids and their corresponding carboxylate anions are generally utilized as Brønsted acids/bases and oxygen nucleophiles in organic synthesis. However, a few asymmetric reactions have used carboxylic acids as electrophiles. Although chiral thioureas bearing both arylboronic acid and tertiary amine were found to promote the aza-Michael addition of BnONH2 to α,β-unsaturated carboxylic acids with moderate to good enantioselectivities, the reaction mechanism remains to be clarified. Detailed investigation of the reaction using spectroscopic analysis and kinetic studies identified tetrahedral borate complexes, comprising two carboxylate anions, as reaction intermediates. We realized a dramatic improvement in product enantioselectivity with the addition of 1 equiv of benzoic acid. In this aza-Michael reaction, the boronic acid not only activates the carboxylate ligand as a Lewis acid, together with the thiourea NH-protons, but also functions as a Brønsted base through a benzoyloxy anion to activate the nucleophile. Moreover, molecular sieves were found to play an important role in generating the ternary borate complexes, which were crucial for obtaining high enantioselectivity as demonstrated by DFT calculations. We also designed a new thiourea catalyst for the intramolecular oxa-Michael addition to suppress another catalytic pathway via a binary borate complex using steric hindrance between the catalyst and substrate. Finally, to demonstrate the synthetic versatility of both hetero-Michael additions, we used them to accomplish the asymmetric synthesis of key intermediates in pharmaceutically important molecules, including sitagliptin and α-tocopherol.
Collapse
Affiliation(s)
- Noboru Hayama
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
| | - Ryuta Kuramoto
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
| | - Tamás Földes
- Institute of Organic Chemistry, Research Centre for Natural Sciences , Hungarian Academy of Sciences , Magyar tudósok körútja 2 , H-1117 Budapest , Hungary
| | - Kazuya Nishibayashi
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
| | - Yusuke Kobayashi
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
| | - Imre Pápai
- Institute of Organic Chemistry, Research Centre for Natural Sciences , Hungarian Academy of Sciences , Magyar tudósok körútja 2 , H-1117 Budapest , Hungary
| | - Yoshiji Takemoto
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
| |
Collapse
|
48
|
Bass SA, Parker DM, Bellinger TJ, Eaton AS, Dibble AS, Koroma KL, Sekyi SA, Pollard DA, Guo F. Development of Conjugate Addition of Lithium Dialkylcuprates to Thiochromones: Synthesis of 2-Alkylthiochroman-4-ones and Additional Synthetic Applications. Molecules 2018; 23:E1728. [PMID: 30011953 PMCID: PMC6099951 DOI: 10.3390/molecules23071728] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Revised: 07/05/2018] [Accepted: 07/13/2018] [Indexed: 12/05/2022] Open
Abstract
Lithium dialkylcuprates undergo conjugate addition to thiochromones to afford 2-alkylthiochroman-4-ones in good yields. This approach provide an efficient and general synthetic approach to privileged sulfur-containing structural motifs and valuable precursors for many pharmaceuticals, starting from common substrates-thiochromones. Good yields of 2-alkyl-substituted thiochroman-4-ones are attained with lithium dialkylcuprates, lithium alkylcyanocuprates or substoichiometric amount of copper salts. The use of commercially available inexpensive alkyllithium reagents will expedite the synthesis of a large library of 2-alkyl substituted thiochroman-4-ones for additional synthetic applications.
Collapse
Affiliation(s)
- Shekinah A Bass
- Department of Chemistry, Winston Salem State University, 601 S. Martin Luther King Jr. Dr., Winston Salem, NC 27110, USA.
| | - Dynasty M Parker
- Department of Chemistry, Winston Salem State University, 601 S. Martin Luther King Jr. Dr., Winston Salem, NC 27110, USA.
| | - Tania J Bellinger
- Department of Chemistry, Winston Salem State University, 601 S. Martin Luther King Jr. Dr., Winston Salem, NC 27110, USA.
| | - Aireal S Eaton
- Department of Chemistry, Winston Salem State University, 601 S. Martin Luther King Jr. Dr., Winston Salem, NC 27110, USA.
| | - Angelica S Dibble
- Department of Chemistry, Winston Salem State University, 601 S. Martin Luther King Jr. Dr., Winston Salem, NC 27110, USA.
| | - Kaata L Koroma
- Department of Chemistry, Winston Salem State University, 601 S. Martin Luther King Jr. Dr., Winston Salem, NC 27110, USA.
| | - Sylvia A Sekyi
- Department of Chemistry, Winston Salem State University, 601 S. Martin Luther King Jr. Dr., Winston Salem, NC 27110, USA.
| | - David A Pollard
- Department of Chemistry, Winston Salem State University, 601 S. Martin Luther King Jr. Dr., Winston Salem, NC 27110, USA.
| | - Fenghai Guo
- Department of Chemistry, Winston Salem State University, 601 S. Martin Luther King Jr. Dr., Winston Salem, NC 27110, USA.
- Biomedical Research Infrastructure Center, Winston Salem State University, Winston Salem, NC 27110, USA.
| |
Collapse
|
49
|
Greenhalgh MD, Qu S, Slawin AMZ, Smith AD. Multiple roles of aryloxide leaving groups in enantioselective annulations employing α,β-unsaturated acyl ammonium catalysis. Chem Sci 2018; 9:4909-4918. [PMID: 29910944 PMCID: PMC5982221 DOI: 10.1039/c8sc01324a] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 05/04/2018] [Indexed: 12/13/2022] Open
Abstract
An isothiourea-catalysed Michael addition-annulation process using β-fluoroalkyl-substituted α,β-unsaturated aryl esters and a range of 2-acylbenzazoles is reported for the enantioselective synthesis of dihydropyranone and dihydropyridinone products bearing polyfluorinated stereocenters (29 examples, up to 98% yield, >99 : 1 er). The choice of aryl group of the aryl ester proved essential in determining reaction enantioselectivity and dihydropyranone : dihydropyridinone product selectivity. The aryloxide leaving group is shown to play a number of essential additional roles, operating (i) as a Brønsted base, circumventing the need for an auxiliary base; and (ii) as a Lewis base to catalyse the isomerisation of dihydropyranone products into thermodynamically-favoured dihydropyridinones. After optimisation, this isomerisation process was exploited for the selective synthesis of dihydropyridinone products using acylbenzothiazoles, and either dihydropyranone or dihydropyridinone products using acylbenzoxazoles. Finally, the phenol derivative, produced following protonation of the aryloxide, is proposed to act as a Brønsted acid, which promotes an isothiourea-catalysed kinetic resolution of benzoxazole-derived dihydropyranones.
Collapse
Affiliation(s)
- Mark D Greenhalgh
- EaStCHEM , School of Chemistry , University of St Andrews , North Haugh , St Andrews KY16 9ST , UK .
| | - Shen Qu
- 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
|
50
|
Affiliation(s)
- Keisuke Asano
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| |
Collapse
|