51
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Kang G, Yamagami M, Vellalath S, Romo D. Enantioselective Synthesis of Medium‐Sized Lactams via Chiral α,β‐Unsaturated Acylammonium Salts. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802483] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Guowei Kang
- Department of Chemistry and Biochemistry Baylor University One Bear Place #97348 Waco TX 76798-7348 USA
| | - Masaki Yamagami
- Biomolecular Chemistry Laboratory Department of Chemistry Graduate School of Science 1-1 Machikaneyama, Toyonaka Osaka 560-0043 Japan
| | - Sreekumar Vellalath
- Department of Chemistry and Biochemistry Baylor University One Bear Place #97348 Waco TX 76798-7348 USA
| | - Daniel Romo
- Department of Chemistry and Biochemistry Baylor University One Bear Place #97348 Waco TX 76798-7348 USA
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52
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Zhang ZF, Zhang CL, Song ZY, Gao ZH, Ye S. N-Heterocyclic Carbene-Catalyzed Annulation of α-Chloroaldehydes with γ-/δ-Amino-α,β-Unsaturated Ketones: Enantioselective Synthesis of Pyrrolidones and Piperidones. Chemistry 2018; 24:8302-8305. [PMID: 29624765 DOI: 10.1002/chem.201801539] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Indexed: 11/06/2022]
Abstract
The N-heterocyclic carbene-catalyzed [2+3] and [2+4] annulations of α-chloroaldehydes with γ-/δ-amino-α,β-unsaturated ketones were developed, giving the corresponding pyrrolidones and piperidones in good yields with exclusive trans-selectivities and excellent enantioselectivities.
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Affiliation(s)
- Zhao-Fei Zhang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chun-Lin Zhang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhi-Yong Song
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhong-Hua Gao
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, 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, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
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53
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Kang G, Yamagami M, Vellalath S, Romo D. Enantioselective Synthesis of Medium-Sized Lactams via Chiral α,β-Unsaturated Acylammonium Salts. Angew Chem Int Ed Engl 2018; 57:6527-6531. [PMID: 29624841 DOI: 10.1002/anie.201802483] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Indexed: 11/12/2022]
Abstract
Medium-sized lactams are important structural motifs found in a variety of bioactive compounds and natural products but are challenging to prepare, especially in optically active form. A Michael addition/proton transfer/lactamization organocascade process is described that delivers medium-sized lactams, including azepanones, benzazepinones, azocanones, and benzazocinones, in high enantiopurity through the intermediacy of chiral α,β-unsaturated acylammonium salts. An unexpected indoline synthesis was also uncovered, and the benzazocinone skeleton was transformed into other complex heterocyclic derivatives, including spiroglutarimides, isoquinolinones, and δ-lactones.
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Affiliation(s)
- Guowei Kang
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, TX, 76798-7348, USA
| | - Masaki Yamagami
- Biomolecular Chemistry Laboratory, Department of Chemistry, Graduate School of Science, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Sreekumar Vellalath
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, TX, 76798-7348, USA
| | - Daniel Romo
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, TX, 76798-7348, USA
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54
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Mahmudov KT, Kopylovich MN, Guedes da Silva MFC, Pombeiro AJL. Chalcogen bonding in synthesis, catalysis and design of materials. Dalton Trans 2018; 46:10121-10138. [PMID: 28686248 DOI: 10.1039/c7dt01685a] [Citation(s) in RCA: 276] [Impact Index Per Article: 46.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Chalcogen bonding is a type of noncovalent interaction in which a covalently bonded chalcogen atom (O, S, Se or Te) acts as an electrophilic species towards a nucleophilic (negative) region(s) in another or in the same molecule. In general, this interaction is strengthened by the presence of an electron-withdrawing group on the electron-acceptor chalcogen atom and upon moving down in the periodic table of elements, from O to Te. Following a short discussion of the phenomenon of chalcogen bonding, this Perspective presents some demonstrative experimental observations in which this bonding is crucial for synthetic transformations, crystal engineering, catalysis and design of materials as synthons/tectons.
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Affiliation(s)
- Kamran T Mahmudov
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal. and Department of Chemistry, Baku State University, Z. Xalilov Str. 23, Az 1148 Baku, Azerbaijan and Organic Chemistry Department, RUDN University, 6 Miklukho-Maklaya str., Moscow 117198, Russian Federation
| | - Maximilian N Kopylovich
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - M Fátima C Guedes da Silva
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Armando J L Pombeiro
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
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55
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Abbasov ME, Hudson BM, Kong W, Tantillo DJ, Romo D. Enantioselective Diels-Alder-lactamization organocascades employing a furan-based diene. Org Biomol Chem 2018; 15:3179-3183. [PMID: 28358148 DOI: 10.1039/c6ob02738e] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
α,β-Unsaturated acylammonium salts are useful dienophiles enabling highly enantioselective and stereodivergent Diels-Alder-initiated organocascades with furan-based dienes. Complex polycyclic systems can thus be obtained from readily prepared dienes, commodity acid chlorides, and a chiral isothiourea organocatalyst under mild conditions. We describe the use of furan-based dienes bearing pendant sulfonamides leading to the generation of oxa-bridged, trans-fused tricyclic γ-lactams. This process constitutes the first highly enantio- and diastereoselective, organocatalytic Diels-Alder cycloadditions with these typically problematic dienes due to their reversibility. Computational studies suggest that the high diastereoselectivity with these furan dienes may be due to a reversible Diels-Alder cycloaddition for the endo adducts. In addition, the utility of this methodology is demonstrated through a concise approach to a core structure with similarity to the natural product isatisine A and a nonpeptidyl ghrelin-receptor inverse agonist.
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Affiliation(s)
- Mikail E Abbasov
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place 97348, Waco, Texas 76798, USA.
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56
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Van KN, Romo D. Multicomponent, Enantioselective Michael-Michael-Aldol-β-Lactonizations Delivering Complex β-Lactones. J Org Chem 2018; 83:632-643. [PMID: 29219311 DOI: 10.1021/acs.joc.7b02543] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Optically active, tertiary amine Lewis bases react with unsaturated acid chlorides to deliver chiral, α,β-unsaturated acylammonium salts. These intermediates participate in a catalytic, enantioselective, three-component process delivering bi- and tricyclic β-lactones through a Michael-Michael-aldol-β-lactonization. In a single operation, the described multicomponent, organocascade process forms complex bi- and tricyclic β-lactones by generating four new bonds, two rings, and up to four contiguous stereocenters. In the racemic series, yields of 22-75% were achieved using 4-pyrrolidinopyridine as Lewis base. In the enantioselective series employing isothiourea catalysts, a kinetic resolution of the initially formed racemic Michael adduct appears operative, providing yields of 46% to quantitative (based on 50% max) with up to 94:6 er. Some evidence for a dynamic kinetic asymmetric transformation for tricyclic-β-lactone 1d was obtained following optimization (yields up to 61%, 94:6 er) through a presumed reversible Michael.
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Affiliation(s)
- Khoi N Van
- Department of Chemistry, Texas A&M University , College Station, Texas 77842, United States
| | - Daniel Romo
- Department of Chemistry & Biochemistry, Baylor University , Waco, Texas 76798, United States
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57
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Ma F, Qian J, Lu P, Wang Y. Convenient synthesis of 2-amino-3-(arylthio)indoles via the Rh-catalyzed reaction of 3-diazoindol-2-imines with thioesters. Org Biomol Chem 2018; 16:439-443. [DOI: 10.1039/c7ob02597a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
2-Amino-3-(arylthio)indoles were conveniently synthesized via the Rh(ii)-catalyzed C–S/N–C coupling reaction between 3-diazoindol-2-imines and thioesters.
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Affiliation(s)
- Fanghui Ma
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- P. R. China
| | - Jing Qian
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- P. R. China
| | - Ping Lu
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- P. R. China
| | - Yanguang Wang
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- P. R. China
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58
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Cao J, Sun K, Dong S, Lu T, Dong Y, Du D. Esters as Alkynyl Acyl Ammonium and Azolium Precursors: A Formal [2 + 3] Annulation with Amidomalonates via Lewis Base/Lewis Acid Cooperative Catalysis. Org Lett 2017; 19:6724-6727. [DOI: 10.1021/acs.orglett.7b03453] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jing Cao
- State Key Laboratory of Natural
Medicines, Department of Organic Chemistry, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Kewen Sun
- State Key Laboratory of Natural
Medicines, Department of Organic Chemistry, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Shuding Dong
- State Key Laboratory of Natural
Medicines, Department of Organic Chemistry, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Tao Lu
- State Key Laboratory of Natural
Medicines, Department of Organic Chemistry, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Ying Dong
- State Key Laboratory of Natural
Medicines, Department of Organic Chemistry, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Ding Du
- State Key Laboratory of Natural
Medicines, Department of Organic Chemistry, China Pharmaceutical University, Nanjing 210009, P. R. China
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59
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Fukata Y, Yao K, Miyaji R, Asano K, Matsubara S. Asymmetric Net Cycloaddition for Access to Diverse Substituted 1,5-Benzothiazepines. J Org Chem 2017; 82:12655-12668. [DOI: 10.1021/acs.joc.7b02451] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yukihiro Fukata
- Department of Material Chemistry, Graduate
School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Koichi Yao
- Department of Material Chemistry, Graduate
School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Ryota Miyaji
- Department of Material Chemistry, Graduate
School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - 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
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60
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Tetrel, Chalcogen, and Charge-Assisted Hydrogen Bonds in 2-((2-Carboxy-1-(substituted)-2-hydroxyethyl)thio) Pyridin-1-ium Chlorides. CRYSTALS 2017. [DOI: 10.3390/cryst7110327] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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61
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Lu H, Zhang JL, Liu JY, Li HY, Xu PF. N-Heterocyclic Carbene-Catalyzed Atom-Economical and Enantioselective Construction of the C–S Bond: Asymmetric Synthesis of Functionalized Thiochromans. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02651] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Hong Lu
- State
Key Laboratory of Applied Organic Chemistry, School of Chemistry and
Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
- Institute
of Microbiology, School of Life Sciences, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Jia-Lu Zhang
- State
Key Laboratory of Applied Organic Chemistry, School of Chemistry and
Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Jin-Yu Liu
- State
Key Laboratory of Applied Organic Chemistry, School of Chemistry and
Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Hong-Yu Li
- Institute
of Microbiology, School of Life Sciences, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Peng-Fei Xu
- State
Key Laboratory of Applied Organic Chemistry, School of Chemistry and
Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
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62
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Matviitsuk A, Greenhalgh MD, Antúnez DB, Slawin AMZ, Smith AD. Aryloxide-Facilitated Catalyst Turnover in Enantioselective α,β-Unsaturated Acyl Ammonium Catalysis. Angew Chem Int Ed Engl 2017; 56:12282-12287. [PMID: 28791763 PMCID: PMC5638104 DOI: 10.1002/anie.201706402] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Indexed: 11/27/2022]
Abstract
A new general concept for α,β-unsaturated acyl ammonium catalysis is reported that uses p-nitrophenoxide release from an α,β-unsaturated p-nitrophenyl ester substrate to facilitate catalyst turnover. This method was used for the enantioselective isothiourea-catalyzed Michael addition of nitroalkanes to α,β-unsaturated p-nitrophenyl esters in generally good yield and with excellent enantioselectivity (27 examples, up to 79 % yield, 99:1 er). Mechanistic studies identified rapid and reversible catalyst acylation by the α,β-unsaturated p-nitrophenyl ester, and a recently reported variable-time normalization kinetic analysis method was used to delineate the complex reaction kinetics.
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Affiliation(s)
- Anastassia Matviitsuk
- EaStCHEMSchool of ChemistryUniversity of St AndrewsNorth HaughSt AndrewsFifeKY16 9STUK
| | - Mark D. Greenhalgh
- EaStCHEMSchool of ChemistryUniversity of St AndrewsNorth HaughSt AndrewsFifeKY16 9STUK
| | | | | | - Andrew D. Smith
- EaStCHEMSchool of ChemistryUniversity of St AndrewsNorth HaughSt AndrewsFifeKY16 9STUK
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63
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A rapid entry into thioflavanones via conjugate additions of diarylcuprates to thiochromones. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.08.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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64
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Matviitsuk A, Greenhalgh MD, Antúnez DJB, Slawin AMZ, Smith AD. Aryloxide-Facilitated Catalyst Turnover in Enantioselective α,β-Unsaturated Acyl Ammonium Catalysis. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706402] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Anastassia Matviitsuk
- 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
| | | | - 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
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65
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Fang C, Lu T, Zhu J, Sun K, Du D. Formal [3 + 4] Annulation of α,β-Unsaturated Acyl Azoliums: Access to Enantioenriched N-H-Free 1,5-Benzothiazepines. Org Lett 2017; 19:3470-3473. [PMID: 28598636 DOI: 10.1021/acs.orglett.7b01457] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
An unprecedented formal [3 + 4] annulation of α,β-unsaturated acyl azoliums with 2-aminobenzenethiols has been utilized to synthesize enantioenriched N-H-free 1,5-benzothiazepines, which are recognized as privileged structures in numerous biologically active scaffolds. This protocol offers a rapid and direct pathway to access the target compounds with high enantioselectivities and has been applied in the concise synthesis of chiral drug (R)-thiazesim.
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Affiliation(s)
- Chao Fang
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University , Nanjing, 210009, P. R. China
| | - Tao Lu
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University , Nanjing, 210009, P. R. China
| | - Jindong Zhu
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University , Nanjing, 210009, P. R. China
| | - Kewen Sun
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University , Nanjing, 210009, P. R. China
| | - Ding Du
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University , Nanjing, 210009, P. R. China
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66
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Meninno S, Volpe C, Lattanzi A. Catalytic Enantioselective Synthesis of Protecting-Group-Free 1,5-Benzothiazepines. Chemistry 2017; 23:4547-4550. [DOI: 10.1002/chem.201700837] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Indexed: 12/12/2022]
Affiliation(s)
- Sara Meninno
- Dipartimento di Chimica e Biologia “A. Zambelli”; Università di Salerno; Via Giovanni Paolo II 84084 Fisciano Italy
| | - Chiara Volpe
- Dipartimento di Chimica e Biologia “A. Zambelli”; Università di Salerno; Via Giovanni Paolo II 84084 Fisciano Italy
| | - Alessandra Lattanzi
- Dipartimento di Chimica e Biologia “A. Zambelli”; Università di Salerno; Via Giovanni Paolo II 84084 Fisciano Italy
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67
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Wang S, Izquierdo J, Rodríguez-Escrich C, Pericàs MA. Asymmetric [4 + 2] Annulation Reactions Catalyzed by a Robust, Immobilized Isothiourea. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00360] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shoulei Wang
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Javier Izquierdo
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Carles Rodríguez-Escrich
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Miquel A. Pericàs
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
- Departament
de Química Inorgànica i Orgànica, Universitat de Barcelona, 08080 Barcelona, Spain
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68
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Chen JQ, Yu WL, Wei YL, Li TH, Xu PF. Photoredox-Induced Functionalization of Alkenes for the Synthesis of Substituted Imidazolines and Oxazolidines. J Org Chem 2016; 82:243-249. [DOI: 10.1021/acs.joc.6b02377] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jian-Qiang Chen
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Wan-Lei Yu
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Yun-Long Wei
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Teng-Hui Li
- The High School Attached to Northwest Normal University, Lanzhou, 730000, P. R. China
| | - Peng-Fei Xu
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, P. R. China
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69
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Matviitsuk A, Taylor JE, Cordes DB, Slawin AMZ, Smith AD. Enantioselective Stereodivergent Nucleophile-Dependent Isothiourea-Catalysed Domino Reactions. Chemistry 2016; 22:17748-17757. [PMID: 27727506 PMCID: PMC5132085 DOI: 10.1002/chem.201603318] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Indexed: 11/12/2022]
Abstract
α,β-Unsaturated acyl ammoniums generated from the reaction of α,β-unsaturated 2,4,6-trichlorophenol (TCP) esters bearing a pendent enone with an isothiourea organocatalyst are versatile intermediates in a range of enantioselective nucleophile-dependent domino processes to form complex products of diverse topology with excellent stereoselectivity. Use of either 1,3-dicarbonyls, acyl benzothiazoles, or acyl benzimidazoles as nucleophiles allows three distinct, diastereodivergent domino reaction pathways to be accessed to form various fused polycyclic cores containing multiple contiguous stereocentres.
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Affiliation(s)
- Anastassia Matviitsuk
- EaStCHEMSchool of ChemistryUniversity of St. Andrews, North HaughSt. AndrewsFifeKY16 9STUK
| | - James E. Taylor
- EaStCHEMSchool of ChemistryUniversity of St. Andrews, North HaughSt. AndrewsFifeKY16 9STUK
| | - David B. Cordes
- EaStCHEMSchool of ChemistryUniversity of St. Andrews, North HaughSt. AndrewsFifeKY16 9STUK
| | - Alexandra M. Z. Slawin
- EaStCHEMSchool of ChemistryUniversity of St. Andrews, North HaughSt. AndrewsFifeKY16 9STUK
| | - Andrew D. Smith
- EaStCHEMSchool of ChemistryUniversity of St. Andrews, North HaughSt. AndrewsFifeKY16 9STUK
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70
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Corti V, Camarero Gonzalez P, Febvay J, Caruana L, Mazzanti A, Fochi M, Bernardi L. Organocatalytic Asymmetric Sulfa-Michael Addition of 2-Aminothiophenols to Chalcones: First Enantioselective Access to 2,3,4,5-Tetrahydro-1,5-benzothiazepines. European J Org Chem 2016. [DOI: 10.1002/ejoc.201601364] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Vasco Corti
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU Bologna; Alma Mater Studiorum - University of Bologna; V. Risorgimento 4 40136 Bologna Italy
| | - Patricia Camarero Gonzalez
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU Bologna; Alma Mater Studiorum - University of Bologna; V. Risorgimento 4 40136 Bologna Italy
| | - Julie Febvay
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU Bologna; Alma Mater Studiorum - University of Bologna; V. Risorgimento 4 40136 Bologna Italy
| | - Lorenzo Caruana
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU Bologna; Alma Mater Studiorum - University of Bologna; V. Risorgimento 4 40136 Bologna Italy
| | - Andrea Mazzanti
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU Bologna; Alma Mater Studiorum - University of Bologna; V. Risorgimento 4 40136 Bologna Italy
| | - Mariafrancesca Fochi
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU Bologna; Alma Mater Studiorum - University of Bologna; V. Risorgimento 4 40136 Bologna Italy
| | - Luca Bernardi
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU Bologna; Alma Mater Studiorum - University of Bologna; V. Risorgimento 4 40136 Bologna Italy
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71
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Wang G, Tang Y, Zhang Y, Liu X, Lin L, Feng X. Enantioselective Synthesis of N-H-Free 1,5-Benzothiazepines. Chemistry 2016; 23:554-557. [PMID: 27862459 DOI: 10.1002/chem.201605127] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Indexed: 11/10/2022]
Abstract
An enantioselective sulfa-Michael-cyclization reaction was developed for the synthesis of 1,5-benzothiazepines with versatile pharmacological activities. The reaction between 2-aminothiophenol and α,β-unsaturated pyrazoleamides gave direct access to N-H-free 1,5-benzothiazepines in the presence of a chiral N,N'-dioxide/Yb(OTf)3 complex. Excellent enantioselectivities (up to 96 % ee) and high yields (up to 99 %) were obtained for a broad range of substrates under mild reaction conditions. This method provided a facile approach to the antidepressant drug (R)-(-)-Thiazesim.
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Affiliation(s)
- Guojin Wang
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P.R. China
| | - Yu Tang
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P.R. China
| | - Yu Zhang
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P.R. China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P.R. China
| | - Lili Lin
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P.R. China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P.R. China
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72
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Vellalath S, Romo D. Asymmetric Organocatalysis: The Emerging Utility of α,β-Unsaturated Acylammonium Salts. Angew Chem Int Ed Engl 2016; 55:13934-13943. [PMID: 27650693 PMCID: PMC5523468 DOI: 10.1002/anie.201602217] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 04/12/2016] [Indexed: 11/06/2022]
Abstract
Although acylammonium salts are well-studied, chiral α,β-unsaturated acylammonium salts have received much less attention. While these intermediates are convenient synthons, which are readily available from several commodity unsaturated acids and acid chlorides, and possess three reactive sites, their application in organic synthesis has been limited because of the lack of appropriate chiral Lewis bases for their generation. In recent years, the utility of chiral, unsaturated acylammonium salts has expanded considerably, thus demonstrating the unique reactivity of this intermediate leading to the development of a diverse array of catalytic, asymmetric transformations including organocascade processes. This Minireview highlights the recent and growing interest in these intermediates which might spark further research into their untapped potential for asymmetric organocascade catalysis. A cursory comparison is made to related unsaturated iminium and acylazolium intermediates.
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Affiliation(s)
- Sreekumar Vellalath
- Department of Chemistry and Biochemistry, Baylor University, Waco, TX, 76798, USA
| | - Daniel Romo
- Department of Chemistry and Biochemistry, Baylor University, Waco, TX, 76798, USA.
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73
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Abbasov ME, Hudson BM, Tantillo DJ, Romo D. Stereodivergent, Diels-Alder-initiated organocascades employing α,β-unsaturated acylammonium salts: scope, mechanism, and application. Chem Sci 2016; 8:1511-1524. [PMID: 28616147 PMCID: PMC5460596 DOI: 10.1039/c6sc04273b] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Accepted: 10/24/2016] [Indexed: 12/16/2022] Open
Abstract
Chiral α,β-unsaturated acylammonium salts are novel dienophiles enabling enantioselective Diels–Alder-lactonization (DAL) organocascades leading to cis- and trans-fused, bicyclic γ- and δ-lactones.
Chiral α,β-unsaturated acylammonium salts are novel dienophiles enabling enantioselective Diels–Alder-lactonization (DAL) organocascades leading to cis- and trans-fused, bicyclic γ- and δ-lactones from readily prepared dienes, commodity acid chlorides, and a chiral isothiourea organocatalyst under mild conditions. We describe extensions of stereodivergent DAL organocascades to other racemic dienes bearing pendant secondary and tertiary alcohols, and application to a formal synthesis of (+)-dihydrocompactin is described. A combined experimental and computational investigation of unsaturated acylammonium salt formation and the entire DAL organocascade pathway provide a rationalization of the effect of Brønsted base additives and enabled a controllable, diastereodivergent DAL process leading to a full complement of possible stereoisomeric products. Evaluation of free energy and enthalpy barriers in conjunction with experimentally observed temperature effects revealed that the DAL is a rare case of an entropy-controlled diastereoselective process. NMR analysis of diene alcohol–Brønsted base interactions and computational studies provide a plausible explanation of observed stabilization of exo transition-state structures through hydrogen-bonding effects.
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Affiliation(s)
- Mikail E Abbasov
- Department of Chemistry and Biochemistry , Baylor University , One Bear Place 97348 , Waco , Texas 76798 , USA
| | - Brandi M Hudson
- Department of Chemistry , University of California-Davis , One Shields Avenue , Davis , California 95616 , USA .
| | - Dean J Tantillo
- Department of Chemistry , University of California-Davis , One Shields Avenue , Davis , California 95616 , USA .
| | - Daniel Romo
- Department of Chemistry and Biochemistry , Baylor University , One Bear Place 97348 , Waco , Texas 76798 , USA
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74
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Mikherdov AS, Kinzhalov MA, Novikov AS, Boyarskiy VP, Boyarskaya IA, Dar'in DV, Starova GL, Kukushkin VY. Difference in Energy between Two Distinct Types of Chalcogen Bonds Drives Regioisomerization of Binuclear (Diaminocarbene)Pd II Complexes. J Am Chem Soc 2016; 138:14129-14137. [PMID: 27700082 DOI: 10.1021/jacs.6b09133] [Citation(s) in RCA: 104] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The reaction of cis-[PdCl2(CNXyl)2] (Xyl = 2,6-Me2C6H3) with various 1,3-thiazol- and 1,3,4-thiadiazol-2-amines in chloroform gives a mixture of two regioisomeric binuclear diaminocarbene complexes. For 1,3-thiazol-2-amines the isomeric ratio depends on the reaction conditions and kinetically (KRs) or thermodynamically (TRs) controlled regioisomers were obtained at room temperature and on heating, respectively. In CHCl3 solutions, the isomers are subject to reversible isomerization accompanied by the cleavage of Pd-N and C-N bonds in the carbene fragment XylNCN(R)Xyl. Results of DFT calculations followed by the topological analysis of the electron density distribution within the formalism of Bader's theory (AIM method) reveal that in CHCl3 solution the relative stability of the regioisomers (ΔGexp = 1.2 kcal/mol; ΔGcalcd = 3.2 kcal/mol) is determined by the energy difference between two types of the intramolecular chalcogen bonds, viz. S···Cl in KRs (2.8-3.0 kcal/mol) and S···N in TRs (4.6-5.3 kcal/mol). In the case of the 1,3,4-thiadiazol-2-amines, the regioisomers are formed in approximately equal amounts and, accordingly, the energy difference between these species is only 0.1 kcal/mol in terms of ΔGexp (ΔGcalcd = 2.1 kcal/mol). The regioisomers were characterized by elemental analyses (C, H, N), HRESI+-MS and FTIR, 1D (1H, 13C{1H}) and 2D (1H,1H-COSY, 1H,1H-NOESY, 1H,13C-HSQC, 1H,13C-HMBC) NMR spectroscopies, and structures of six complexes (three KRs and three TRs) were elucidated by single-crystal X-ray diffraction.
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Affiliation(s)
- Alexander S Mikherdov
- Saint Petersburg State University , 7/9 Universitetskaya Nab., Saint Petersburg, 199034, Russian Federation
| | - Mikhail A Kinzhalov
- Saint Petersburg State University , 7/9 Universitetskaya Nab., Saint Petersburg, 199034, Russian Federation
| | - Alexander S Novikov
- Saint Petersburg State University , 7/9 Universitetskaya Nab., Saint Petersburg, 199034, Russian Federation
| | - Vadim P Boyarskiy
- Saint Petersburg State University , 7/9 Universitetskaya Nab., Saint Petersburg, 199034, Russian Federation
| | - Irina A Boyarskaya
- Saint Petersburg State University , 7/9 Universitetskaya Nab., Saint Petersburg, 199034, Russian Federation
| | - Dmitry V Dar'in
- Saint Petersburg State University , 7/9 Universitetskaya Nab., Saint Petersburg, 199034, Russian Federation
| | - Galina L Starova
- Saint Petersburg State University , 7/9 Universitetskaya Nab., Saint Petersburg, 199034, Russian Federation
| | - Vadim Yu Kukushkin
- Saint Petersburg State University , 7/9 Universitetskaya Nab., Saint Petersburg, 199034, Russian Federation
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75
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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.
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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 .
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76
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Meng L, Jin MY, Wang J. Rh-Catalyzed Conjugate Addition of Arylzinc Chlorides to Thiochromones: A Highly Enantioselective Pathway for Accessing Chiral Thioflavanones. Org Lett 2016; 18:4986-4989. [DOI: 10.1021/acs.orglett.6b02453] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ling Meng
- Department of Chemistry, South University of Science and Technology of China, Shenzhen 518055, China
| | - Ming Yu Jin
- Department of Chemistry, South University of Science and Technology of China, Shenzhen 518055, China
| | - Jun Wang
- Department of Chemistry, South University of Science and Technology of China, Shenzhen 518055, China
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77
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Vellalath S, Romo D. Asymmetrische Organokatalyse: α,β‐ungesättigte Acylammoniumsalze erweisen sich als immer nützlicher. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602217] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sreekumar Vellalath
- Department of Chemistry and Biochemistry Baylor University Waco TX 76798 USA
| | - Daniel Romo
- Department of Chemistry and Biochemistry Baylor University Waco TX 76798 USA
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78
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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.
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Affiliation(s)
- Daniel G Stark
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, UK.
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79
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Merad J, Pons JM, Chuzel O, Bressy C. Enantioselective Catalysis by Chiral Isothioureas. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600399] [Citation(s) in RCA: 131] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jérémy Merad
- Aix Marseille Université, Centrale Marseille; CNRS, iSm2 UMR 7313; 13397 Marseille France
| | - Jean-Marc Pons
- Aix Marseille Université, Centrale Marseille; CNRS, iSm2 UMR 7313; 13397 Marseille France
| | - Olivier Chuzel
- Aix Marseille Université, Centrale Marseille; CNRS, iSm2 UMR 7313; 13397 Marseille France
| | - Cyril Bressy
- Aix Marseille Université, Centrale Marseille; CNRS, iSm2 UMR 7313; 13397 Marseille France
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80
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Ahlemeyer NA, Birman VB. Asymmetric Catalytic Synthesis of Thiochromenes via an Acyl Transfer-Initiated Cascade. Org Lett 2016; 18:3454-7. [DOI: 10.1021/acs.orglett.6b01639] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nicholas A. Ahlemeyer
- Department of Chemistry, Washington University, Campus Box 1134, One Brookings Drive, Saint Louis, Missouri 63130, United States
| | - Vladimir B. Birman
- Department of Chemistry, Washington University, Campus Box 1134, One Brookings Drive, Saint Louis, Missouri 63130, United States
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81
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Robinson ERT, Walden DM, Fallan C, Greenhalgh MD, Cheong PHY, Smith AD. Non-bonding 1,5-S···O interactions govern chemo- and enantioselectivity in isothiourea-catalyzed annulations of benzazoles. Chem Sci 2016; 7:6919-6927. [PMID: 28567263 PMCID: PMC5450589 DOI: 10.1039/c6sc00940a] [Citation(s) in RCA: 115] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 07/02/2016] [Indexed: 12/22/2022] Open
Abstract
Isothiourea-catalyzed annulations between 2-acyl benzazoles and α,β-unsaturated acyl ammonium intermediates are selectively tuned to form either lactam or lactone heterocycles in good yields (up to 95%) and high ee (up to 99%) using benzothiazole or benzoxazole derivatives, respectively. Computation gives insight into the significant role of two 1,5-S···O interactions in controlling the structural preorganization and chemoselectivity observed within the lactam synthesis with benzothiazoles as nucleophiles. When using benzazoles the absence of a second stabilizing non-bonding 1,5-S···O interaction leads to a dominant C-H···O interaction in determining structural preorganization and lactone formation.
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Affiliation(s)
- Emily R T Robinson
- EaStCHEM , School of Chemistry , University of St Andrews , North Haugh , St Andrews KY16 9ST , UK .
| | - Daniel M Walden
- Department of Chemistry , Oregon State University , 135 Gilbert Hall , Corvallis , OR 97331 , USA .
| | - Charlene Fallan
- 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 .
| | - Paul Ha-Yeon Cheong
- Department of Chemistry , Oregon State University , 135 Gilbert Hall , Corvallis , OR 97331 , USA .
| | - Andrew D Smith
- EaStCHEM , School of Chemistry , University of St Andrews , North Haugh , St Andrews KY16 9ST , UK .
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82
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Moon HK, Sung GH, Kim BR, Park JK, Yoon YJ, Yoon HJ. One for Many: A Universal Reagent for Acylation Processes. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201501177] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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83
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Zhao HW, Pang HL, Tian T, Li B, Chen XQ, Song XQ, Meng W, Yang Z, Liu YY, Zhao YD. Construction of 2,3,4,7-Tetrahydro-1,2,4,5-oxatriazepines via [4+3] Cycloadditions of α-Halogeno Hydrazones with Nitrones. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600093] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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84
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Dar AA, Shadab M, Khan S, Ali N, Khan AT. One-Pot Synthesis and Evaluation of Antileishmanial Activities of Functionalized S-Alkyl/Aryl Benzothiazole-2-carbothioate Scaffold. J Org Chem 2016; 81:3149-60. [PMID: 26999637 DOI: 10.1021/acs.joc.6b00113] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The synthesis of hitherto unreported S-alkyl/aryl benzothiazole-2-carbothioate is reported from thiols, oxalyl chloride, and 2-aminothiophenols using 10 mol % n-tetrabutylammonium iodide (TBAI) as catalyst in acetonitrile through multicomponent reaction (MCR) strategy. The present protocol favored formation of benzothiazoles and thioesters via simultaneous formation of C-N and C-S bonds in good yields with a wide range of substrates. A few of the synthesized derivatives were evaluated for their antimicrobial activity against the protozoan parasite Leishmania donovani, a causative agent of visceral leishmaniasis (VL). Further, these compounds displayed no toxicity toward macrophage RAW 264.7 cells and are therefore nontoxic and effective antileishmanial leads. In silico docking studies were performed to understand the possible binding site interaction with trypanothione reductase (TryR).
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Affiliation(s)
- Ajaz A Dar
- Department of Chemistry, Indian Institute of Technology Guwahati , Guwahati 781 039, India
| | - M Shadab
- Infectious Diseases and Immunology Division, Indian Institute of Chemical Biology , 4, Raja S.C. Mullick Road, Kolkata 700 032, India
| | - Suman Khan
- Department of Chemistry, Pohang University of Science and Technology , Pohang, 37673, Republic of South Korea
| | - Nahid Ali
- Infectious Diseases and Immunology Division, Indian Institute of Chemical Biology , 4, Raja S.C. Mullick Road, Kolkata 700 032, India
| | - Abu T Khan
- Department of Chemistry, Indian Institute of Technology Guwahati , Guwahati 781 039, India
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85
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Luo H, Yan X, Chen L, Li Y, Liu N, Yin G. Enantioselective Catalytic Domino Aza-Michael-Henry Reactions: One-Pot Asymmetric Synthesis of 3-Nitro-1,2-dihydroquinolines via Iminium Activation. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501618] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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86
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Li W, Schlepphorst C, Daniliuc C, Glorius F. Asymmetric Hydrogenation of Vinylthioethers: Access to Optically Active 1,5-Benzothiazepine Derivatives. Angew Chem Int Ed Engl 2016; 55:3300-3. [DOI: 10.1002/anie.201512032] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Indexed: 01/21/2023]
Affiliation(s)
- Wei Li
- Westfälische Wilhelms-Universität Münster; Organisch-Chemisches Institut; Corrensstrasse 40 48149 Münster Germany
| | - Christoph Schlepphorst
- Westfälische Wilhelms-Universität Münster; Organisch-Chemisches Institut; Corrensstrasse 40 48149 Münster Germany
| | - Constantin Daniliuc
- Westfälische Wilhelms-Universität Münster; Organisch-Chemisches Institut; Corrensstrasse 40 48149 Münster Germany
| | - Frank Glorius
- Westfälische Wilhelms-Universität Münster; Organisch-Chemisches Institut; Corrensstrasse 40 48149 Münster Germany
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87
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Li W, Schlepphorst C, Daniliuc C, Glorius F. Asymmetrische Hydrierung von Vinylthioethern: Zugang zu optisch aktiven 1,5-Benzothiazepinderivaten. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201512032] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Wei Li
- Westfälische Wilhelms-Universität Münster; Organisch-Chemisches Institut; Corrensstraße 40 48149 Münster Deutschland
| | - Christoph Schlepphorst
- Westfälische Wilhelms-Universität Münster; Organisch-Chemisches Institut; Corrensstraße 40 48149 Münster Deutschland
| | - Constantin Daniliuc
- Westfälische Wilhelms-Universität Münster; Organisch-Chemisches Institut; Corrensstraße 40 48149 Münster Deutschland
| | - Frank Glorius
- Westfälische Wilhelms-Universität Münster; Organisch-Chemisches Institut; Corrensstraße 40 48149 Münster Deutschland
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88
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Abstract
AbstractSulfur and nitrogen (half-)mustard carbonate analogues are a new class of compounds, easily synthesized by methoxycarbonylation reaction of the parent alcohols with dialkyl carbonates. In this work, their reactivity as novel, green electrophiles is reported. Reactions have been conducted in autoclave conditions at high temperature (180°C), under pressure and in absence of any base, as well as, in neat at atmospheric pressure, lower temperature (150°C) and in the presence of a catalytic amount of a base. Several nucleophiles have been investigated resulting, in some cases, in unexpected compounds, i.e., six-membered heterocycle piperidine. Reaction mechanism and kinetics have been studied confirming that these compounds retain the anchimeric effect of their mustard gas analogues, without being toxic. Noteworthy, a symmetrical nitrogen mustard carbonate has also been employed as reagent in the preparation of a new family of macrocycles i.e., azacrowns, before not easily accessible.
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Affiliation(s)
- Fabio Aricò
- 1Department of Environmental Science, Informatics and Statistics, Ca’ Foscari University, 2137 Dorsoduro, 30123 Venezia
| | - Pietro Tundo
- 1Department of Environmental Science, Informatics and Statistics, Ca’ Foscari University, 2137 Dorsoduro, 30123 Venezia
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89
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Sun X, Fei J, Zou C, Lu M, Ye J. Remote stereocontrolled asymmetric 1,6-addition/1,4-addition cascade reactions between cyclic dienones and 2-indolinethiones. RSC Adv 2016. [DOI: 10.1039/c6ra19916j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Enantioselective 1,6-addition/1,4-addition cascade reactions between cyclic dienones and 2-indolnethiones have been realized, affording chiral spiro[thiopyranoindole-cyclohexanone] scaffolds facilely and efficiently.
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Affiliation(s)
- Xiaohua Sun
- Engineering Research Center of Pharmaceutical Process Chemistry
- Ministry of Education
- Shanghai Key Laboratory of New Drug Design
- School of Pharmacy
- East China University of Science and Technology
| | - Jie Fei
- Engineering Research Center of Pharmaceutical Process Chemistry
- Ministry of Education
- Shanghai Key Laboratory of New Drug Design
- School of Pharmacy
- East China University of Science and Technology
| | - Chuncheng Zou
- Engineering Research Center of Pharmaceutical Process Chemistry
- Ministry of Education
- Shanghai Key Laboratory of New Drug Design
- School of Pharmacy
- East China University of Science and Technology
| | - Min Lu
- Engineering Research Center of Pharmaceutical Process Chemistry
- Ministry of Education
- Shanghai Key Laboratory of New Drug Design
- School of Pharmacy
- East China University of Science and Technology
| | - Jinxing Ye
- Engineering Research Center of Pharmaceutical Process Chemistry
- Ministry of Education
- Shanghai Key Laboratory of New Drug Design
- School of Pharmacy
- East China University of Science and Technology
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90
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Meyer AG, Smith JA, Hyland C, Williams CC, Bissember AC, Nicholls TP. Seven-Membered Rings. PROGRESS IN HETEROCYCLIC CHEMISTRY 2016. [DOI: 10.1016/b978-0-08-100755-6.00016-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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91
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92
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Qu Y, Zhang X, Wang L, Yang H, Yang L, Cao J, Hua J. A phenazine-based near-infrared (NIR) chemodosimeter for cysteine obtained via a carbonyl-assisted cycloaddition process. RSC Adv 2016. [DOI: 10.1039/c5ra26784f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A NIR phenazine-based chemodosimeter (PHS) is developed for sensing cysteine with high sensitivity, good selectivity and rapid response. The α,β-unsaturated carbonyl NHS-ester was employed as an recognition unit through a cycloaddition mechanism.
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Affiliation(s)
- Yi Qu
- College of Chemistry and Chemical Engineering
- Shanghai University of Engineering Science
- Shanghai
- PR China
| | - Xiao Zhang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- East China University of Science & Technology
- Shanghai
- PR China
| | - Linlin Wang
- College of Chemistry and Chemical Engineering
- Shanghai University of Engineering Science
- Shanghai
- PR China
| | - Huiran Yang
- Department of Chemistry
- Fudan University
- Shanghai
- PR China
| | - Lin Yang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- East China University of Science & Technology
- Shanghai
- PR China
| | - Jian Cao
- College of Chemistry and Chemical Engineering
- Shanghai University of Engineering Science
- Shanghai
- PR China
| | - Jianli Hua
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- East China University of Science & Technology
- Shanghai
- PR China
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93
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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
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94
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Li X, Gai K, Yuan Z, Wu J, Lin A, Yao H. Organocatalyzed Formal [4+2] Cycloaddition ofin situGenerated Azoalkenes with Arylacetic Acids: An Efficient Approach to the Synthesis of 4,5-Dihydropyridazin-3(2H)-ones. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500645] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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95
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Maeda K, Terada T, Iwamoto T, Kurahashi T, Matsubara S. Ruthenium-Porphyrin-Catalyzed [4 + 2] Cycloaddition of α,β-Unsaturated Imines and Aldehydes. Org Lett 2015; 17:5284-7. [PMID: 26492441 DOI: 10.1021/acs.orglett.5b02654] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new efficient synthetic route to unsymmetrically substituted dihydropyridine scaffolds via dehydrative [4 + 2] cycloaddition of N-tosylated α,β-unsaturated imines with aldehydes has been developed. This transformation is enabled by (i) the remarkable catalytic ability of the cationic Ru(IV) porphyrin complex to activate both the imino and carbonyl groups and (ii) the hydrophobic nature of the porphyrin ligand, which helps realize robust Lewis acidity in the dehydrative cycloaddition.
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Affiliation(s)
- Kazuki Maeda
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University , Kyoto 615-8510, Japan
| | - Takuma Terada
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University , Kyoto 615-8510, Japan
| | - Takahiro Iwamoto
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University , Kyoto 615-8510, Japan
| | - Takuya Kurahashi
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University , Kyoto 615-8510, Japan.,JST, ACT-C, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University , Kyoto 615-8510, Japan
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96
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Miura T, Fujimoto Y, Funakoshi Y, Murakami M. A Reaction of Triazoles with Thioesters to Produce β‐Sulfanyl Enamides by Insertion of an Enamine Moiety into the Sulfur–Carbonyl Bond. Angew Chem Int Ed Engl 2015; 54:9967-70. [DOI: 10.1002/anie.201504013] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2015] [Indexed: 11/05/2022]
Affiliation(s)
- Tomoya Miura
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto 615‐8510 (Japan)
| | - Yoshikazu Fujimoto
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto 615‐8510 (Japan)
| | - Yuuta Funakoshi
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto 615‐8510 (Japan)
| | - Masahiro Murakami
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto 615‐8510 (Japan)
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97
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Miura T, Fujimoto Y, Funakoshi Y, Murakami M. A Reaction of Triazoles with Thioesters to Produce β-Sulfanyl Enamides by Insertion of an Enamine Moiety into the Sulfur-Carbonyl Bond. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504013] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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98
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Ni Q, Xiong J, Song X, Raabe G, Enders D. NHC-catalyzed activation of α,β-unsaturated N-acyltriazoles: an easy access to dihydropyranones. Chem Commun (Camb) 2015; 51:14628-31. [DOI: 10.1039/c5cc06044c] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Employing the NHC-catalyzed activation of α,β-unsaturated N-acyltriazoles an efficient enantioselective synthesis of dihydropyranones via a formal [3+3] cycloaddition with 1,3-dicarbonyl compounds is described.
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Affiliation(s)
- Qijian Ni
- Institute of Organic Chemistry
- RWTH Aachen University
- 52074 Aachen
- Germany
| | - Jiawen Xiong
- Institute of Organic Chemistry
- RWTH Aachen University
- 52074 Aachen
- Germany
| | - Xiaoxiao Song
- Institute of Organic Chemistry
- RWTH Aachen University
- 52074 Aachen
- Germany
| | - Gerhard Raabe
- Institute of Organic Chemistry
- RWTH Aachen University
- 52074 Aachen
- Germany
| | - Dieter Enders
- Institute of Organic Chemistry
- RWTH Aachen University
- 52074 Aachen
- Germany
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