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Xiao Y, Tang L, Xu TT, Sheng JYH, Zhou Z, Yue L, Wang G, Oestreich M, Feng JJ. Atom-economic and stereoselective catalytic synthesis of fully substituted enol esters/carbonates of amides in acyclic systems enabled by boron Lewis acid catalysis. Chem Sci 2023; 14:5608-5618. [PMID: 37265723 PMCID: PMC10231430 DOI: 10.1039/d3sc01394d] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 04/21/2023] [Indexed: 06/03/2023] Open
Abstract
Carboacyloxylation of internal alkynes is emerging as a powerful and straightforward strategy for enol ester synthesis. However, the reported examples come with limitations, including the utilization of noble metal catalysts, the control of regio- and Z/E selectivity, and an application in the synthesis of enol carbonates. Herein, a boron Lewis acid-catalyzed intermolecular carboacyloxylation of ynamides with esters to access fully substituted acyclic enol esters in high yield with generally high Z/E selectivity (up to >96 : 4) is reported. Most importantly, readily available allylic carbonates are also compatible with this difunctionalization reaction, representing an atom-economic, catalytic and stereoselective protocol for the construction of acyclic β,β-disubstituted enol carbonates of amides for the first time. The application of the carboacyloxylation products to decarboxylative allylations provided a ready access to enantioenriched α-quaternary amides. Moreover, experimental studies and theoretical calculations were performed to illustrate the reaction mechanism and rationalize the stereochemistry.
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Affiliation(s)
- Yuanjiu Xiao
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha Hunan 410082 P. R. China
| | - Lei Tang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha Hunan 410082 P. R. China
| | - Tong-Tong Xu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha Hunan 410082 P. R. China
| | - Jiang-Yi-Hui Sheng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha Hunan 410082 P. R. China
| | - Zhongyan Zhou
- College of Biology, Mass Spectrometry Lab of Bio-Chemistry, Hunan University P. R. China
| | - Lei Yue
- College of Biology, Mass Spectrometry Lab of Bio-Chemistry, Hunan University P. R. China
| | - Guoqiang Wang
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210093 P. R. China
| | - Martin Oestreich
- Institut für Chemie, Technische Universität Berlin Strasse des 17. Juni 115 10623 Berlin Germany https://www.tu.berlin/en/organometallics
| | - Jian-Jun Feng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha Hunan 410082 P. R. China
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2
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Hao MY, Zhang Y, Lin N, Fu R, Ji XS, Jiang B, Tu SJ, Hao WJ. Gold self-relay catalysis enabling annulative oxygenation of propargylic alcohols with O-nucleophiles. Chem Commun (Camb) 2023; 59:4032-4035. [PMID: 36924136 DOI: 10.1039/d3cc00089c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
Abstract
A new gold(I) self-relay catalysis reaction enabling the annulative oxygenation of propargylic alcohols with various O-nucleophiles, such as carboxylic acids, alcohols and TBHP, is reported, producing a series of functionalized benzofurans in moderate to good yields under mild conditions. This protocol benefits from the π- and σ-Lewis acid capability of gold complexes, demonstrating high molecular convergence, broad substrate flexibility, high functional group compatibility and mild conditions.
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Affiliation(s)
- Meng-Ying Hao
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China. .,School of Pharmacy, Zhengzhou Vocational College of Medicine and Health, Zhengzhou 452385, P. R. China
| | - Yin Zhang
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - Na Lin
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - Rong Fu
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - Xiao-Shuang Ji
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - Bo Jiang
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - Shu-Jiang Tu
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - Wen-Juan Hao
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
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A Novel Method to Construct 2-Aminobenzofurans via [4 + 1] Cycloaddition Reaction of In Situ Generated Ortho-Quinone Methides with Isocyanides. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27238538. [PMID: 36500630 PMCID: PMC9737762 DOI: 10.3390/molecules27238538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/28/2022] [Accepted: 12/02/2022] [Indexed: 12/09/2022]
Abstract
A new approach for the synthesis of 2-aminobenzofurans has been described via Sc(OTf)3 mediated formal cycloaddition of isocyanides with the in situ generated ortho-quinone methides (o-QMs) from o-hydroxybenzhydryl alcohol. Notably, as a class of readily available and highly active intermediates, o-QMs were first used in the construction of benzofurans. This [4 + 1] cycloaddition reaction provides a straightforward and efficient methodology for the construction of 2-aminobenzofurans scaffold in good yield (up to 93% yield) under mild conditions.
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Song H, Sun J, LÜ M, Liu Y, Wei B. Trifluoromethyl Sulfonic Anhydride Mediated Addition of Pyridine with Ynamides. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202203061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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5
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Xu H, Liu Y, Ding L, Wang XN, Chang J. Lewis acid-promoted cyclizations of o-alkyloxyphenyl-substituted ynamides to construct 2-amidobenzofurans. Org Chem Front 2022. [DOI: 10.1039/d2qo01246d] [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
Lewis acid-promoted cyclizations of o-alkyloxyphenyl-substituted ynamides are described for the general construction of medicinally relevant 2-amidobenzofurans. A diverse array of 3-acyl-2-amidobenzofurans could be effectively constructed via a SnCl4-promoted intermolecular cyclization....
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Nie XD, Han XL, Sun JT, Si CM, Wei BG, Lin GQ. Nickel-Catalyzed Regioselective Hydroamination of Ynamides with Secondary Amines. J Org Chem 2021; 86:3433-3443. [DOI: 10.1021/acs.joc.0c02807] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Xiao-Di Nie
- School of Pharmacy and Institutes of Biomedical Sciences, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Xiao-Li Han
- School of Pharmacy and Institutes of Biomedical Sciences, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Jian-Ting Sun
- School of Pharmacy and Institutes of Biomedical Sciences, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Chang-Mei Si
- School of Pharmacy and Institutes of Biomedical Sciences, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Bang-Guo Wei
- School of Pharmacy and Institutes of Biomedical Sciences, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Guo-Qiang Lin
- Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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7
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Er(OTf)3-catalyzed approach to 3-alkenylindoles through regioselective addition of ynamides and indoles. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131649] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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8
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Duc DX. Recent Achievement in the Synthesis of Benzo[b]furans. Curr Org Synth 2020; 17:498-517. [PMID: 32586253 DOI: 10.2174/1570179417666200625212639] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 05/21/2020] [Accepted: 05/28/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Benzo[b]furan derivatives are oxygen-containing heterocyclic compounds consisting of fused benzene and furan rings and are present in a large number of natural and non-natural compounds. This class of compounds has a wide spectrum of biological activities, such as antiarrhythmic, anticancer, inflammatory, antioxidant, antimicrobial, and antiviral. Furthermore, benzo[b]furan derivatives have also been applied in various areas, such as organic electroluminescence device materials and organic dyes, photosensitizing material, organic synthesis as building blocks or intermediates. Because of a broad range of applicability, the synthesis of benzo[b]furan derivative has drawn great attention of chemists and many studies on the synthesis of this class of compounds have been reported recently. This review will give an overview of benzo[b]furan preparation based on studies dating back to the year 2012. OBJECTIVE In this review, recent development in the synthesis of benzo[b]furans are discussed. There has been increasingly new methodologies for the construction of benzo[b]furans skeleton to improve efficiency or develop environmentally friendly procedures. In some studies, reaction mechanisms were also outlined. CONCLUSION Many methods for the synthesis of benzo[b]furans have been reported recently. Most of them involve cyclization or cycloisomerization processes. Unquestionably, more imaginative strategies for the construction of benzo[b]furan skeleton will be established in the near future. Application of known methods to natural products or drug synthesis, on industrial scale for the synthesis of economically or medicinally important benzo[ b]furans will probably be paid attention to.
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Affiliation(s)
- Dau Xuan Duc
- Department of Chemistry, Vinh University, Vinh City, Vietnam
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9
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Di Nicola A, Marsicano V, Arcadi A, Michelet V. Room temperature palladium-catalyzed hydroarylation of ynamides in water. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151725] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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10
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Dutta S, Yang S, Vanjari R, Mallick RK, Gandon V, Sahoo AK. Keteniminium‐Driven Umpolung Difunctionalization of Ynamides. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915522] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Shubham Dutta
- School of ChemistryUniversity of Hyderabad Hyderabad India
| | - Shengwen Yang
- Institut de Chimie Moléculaire et des Matériaux d'OrsayCNRS UMR 8182Université Paris-Saclay Bâtiment 420 91405 Orsay cedex France
- Laboratoire de Chimie Moléculaire (LCM)CNRS UMR 9168Ecole PolytechniqueUniversité Paris-Saclay route de Saclay 91128 Palaiseau cedex France
| | | | | | - Vincent Gandon
- Institut de Chimie Moléculaire et des Matériaux d'OrsayCNRS UMR 8182Université Paris-Saclay Bâtiment 420 91405 Orsay cedex France
- Laboratoire de Chimie Moléculaire (LCM)CNRS UMR 9168Ecole PolytechniqueUniversité Paris-Saclay route de Saclay 91128 Palaiseau cedex France
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11
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Dutta S, Yang S, Vanjari R, Mallick RK, Gandon V, Sahoo AK. Keteniminium-Driven Umpolung Difunctionalization of Ynamides. Angew Chem Int Ed Engl 2020; 59:10785-10790. [PMID: 32034993 DOI: 10.1002/anie.201915522] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 01/17/2020] [Indexed: 01/25/2023]
Abstract
A three-component Pd-catalyzed coupling of ynamides, aryl diazonium salts, and aryl boronic acids for the synthesis of novel triaryl-substituted enamides is described. This transformation represents the first example of an umpolung regioselective unsymmetrical syn-1,2-diarylation/aryl-olefination of ynamides. The aryl moieties of the diazonium salt (electrophile) and boronic acid (nucleophile) are explicitly incorporated in the electrophilic α- and nucleophilic β-position, respectively, of the ynamide, resulting in a single isomer of the N-bearing tetrasubstituted olefin. The scope is broad (68 examples), showing excellent functional-group tolerance. DFT calculations substantiate the rationale of the mechanistic cycle and the regioselectivity. The chemoselectivity and synthetic potential of the enamide products were also studied.
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Affiliation(s)
- Shubham Dutta
- School of Chemistry, University of Hyderabad, Hyderabad, India
| | - Shengwen Yang
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182, Université Paris-Saclay, Bâtiment 420, 91405, Orsay cedex, France.,Laboratoire de Chimie Moléculaire (LCM), CNRS UMR 9168, Ecole Polytechnique, Université Paris-Saclay, route de Saclay, 91128, Palaiseau cedex, France
| | | | | | - Vincent Gandon
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182, Université Paris-Saclay, Bâtiment 420, 91405, Orsay cedex, France.,Laboratoire de Chimie Moléculaire (LCM), CNRS UMR 9168, Ecole Polytechnique, Université Paris-Saclay, route de Saclay, 91128, Palaiseau cedex, France
| | - Akhila K Sahoo
- School of Chemistry, University of Hyderabad, Hyderabad, India
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12
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Anitha M, Shankar M, Kumara Swamy KC. Reactivity of epoxy-ynamides with metal halides: nucleophile (Br/Cl/OH)-assisted tandem intramolecular 5-exo-digor 6-endo-digcyclisation and AgF2-promoted oxidation. Org Chem Front 2019. [DOI: 10.1039/c9qo00027e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Several metal halides (CuBr, LiCl, CuF2, AgF2) react with epoxy-ynamides to afford 1,3-oxazolidines, 1,4-oxazines or 1,2-dioxo-enamides.
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Affiliation(s)
- Mandala Anitha
- School of Chemistry
- University of Hyderabad
- Hyderabad 500 046
- India
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13
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Han P, Mao ZY, Si CM, Zhou Z, Wei BG, Lin GQ. Stereoselective Synthesis of Pyrido- and Pyrrolo[1,2-c][1,3]oxazin-1-ones via a Nucleophilic Addition–Cyclization Process of N,O-Acetal with Ynamides. J Org Chem 2018; 84:914-923. [DOI: 10.1021/acs.joc.8b02795] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Pan Han
- School of Pharmacy and Institutes of Biomedical Sciences, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Zhuo-Ya Mao
- School of Pharmacy and Institutes of Biomedical Sciences, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Chang-Mei Si
- School of Pharmacy and Institutes of Biomedical Sciences, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Zhu Zhou
- School of Pharmacy and Institutes of Biomedical Sciences, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Bang-Guo Wei
- School of Pharmacy and Institutes of Biomedical Sciences, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Guo-Qiang Lin
- School of Pharmacy and Institutes of Biomedical Sciences, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
- Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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14
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Theunissen C, Métayer B, Lecomte M, Henry N, Chan HC, Compain G, Gérard P, Bachmann C, Mokhtari N, Marrot J, Martin-Mingot A, Thibaudeau S, Evano G. Cationic polycyclization of ynamides: building up molecular complexity. Org Biomol Chem 2018; 15:4399-4416. [PMID: 28485455 DOI: 10.1039/c7ob00850c] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polycyclization reactions are among the most efficient synthetic tools for the synthesis of complex, polycyclic molecules in a single operation from simple starting materials. We report in this manuscript a full account on the discovery and development of a novel cationic polycyclization from readily available ynamides. Simple activation of these building blocks under acidic conditions enables the generation of highly reactive activated keteniminium ions, which triggers an unprecedented cationic polycyclization yielding highly substituted polycyclic nitrogen heterocycles possessing up to seven fused cycles and three contiguous stereocenters.
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Affiliation(s)
- Cédric Theunissen
- Laboratoire de Chimie Organique, Service de Chimie et PhysicoChimie Organiques, Université libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50, CP160/06, 1050 Brussels, Belgium.
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15
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Lewis Acid-Catalyzed Yne-Carbonyl Metathesis of Ynamides and Cyclobutanones: Facile Synthesis of Functionalized Alkylidenecyclobutanes. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201700709] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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16
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Giri SS, Liu RS. Gold-Catalyzed [4+2]- and [3+3]-Annulations of Ynamides with 1-Yn-3-ols to Access Six-Membered Carbocycles and Oxacycles via
Three Distinct Cyclizations. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700784] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sovan Sundar Giri
- Department of Chemistry; National Tsing-Hua University; Hsinchu Taiwan, ROC
| | - Rai-Shung Liu
- Department of Chemistry; National Tsing-Hua University; Hsinchu Taiwan, ROC
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17
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Sabbasani VR, Lee H, Xie P, Xia Y, Lee D. Cyclization of Ynamide‐Tethered 1,3,8‐Triynes. Chemistry 2017; 23:8161-8165. [PMID: 28431205 DOI: 10.1002/chem.201701781] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Indexed: 11/05/2022]
Affiliation(s)
- Venkata R. Sabbasani
- Department of Chemistry University of Illinois at Chicago 845 West Taylor Street Chicago IL 60607 USA
| | - Hyunjin Lee
- Department of Chemistry University of Illinois at Chicago 845 West Taylor Street Chicago IL 60607 USA
| | - Peipei Xie
- College of Chemistry and Materials Engineering Wenzhou University Wenzhou Zhejiang Province 325035 P.R. China
| | - Yuanzhi Xia
- College of Chemistry and Materials Engineering Wenzhou University Wenzhou Zhejiang Province 325035 P.R. China
| | - Daesung Lee
- Department of Chemistry University of Illinois at Chicago 845 West Taylor Street Chicago IL 60607 USA
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18
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Siva Reddy A, Leela Siva Kumari A, Swamy KK. Palladium-catalyzed regioselective synthesis of benzosultams from functionalized ynamides and benzotriazoles/tetrazoles. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.03.070] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Giri SS, Lin LH, Jadhav PD, Liu RS. Gold-Catalyzed 1,4-Carbooxygenation of 3-En-1-ynamides with Allylic and Propargylic AlcoholsviaNon-Claisen Pathways. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201601092] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Sovan Sundar Giri
- Department of Chemistry; National Tsing-Hua University; Hsinchu Taiwan, ROC
| | - Li-Hsuan Lin
- Department of Chemistry; National Tsing-Hua University; Hsinchu Taiwan, ROC
| | | | - Rai-Shung Liu
- Department of Chemistry; National Tsing-Hua University; Hsinchu Taiwan, ROC
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20
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Mao LL, Li YH, Yang SD. Silver-catalyzed phosphonylation of unprotected propargylic alcohols for the synthesis of allenylphosphoryl compounds. Org Chem Front 2017. [DOI: 10.1039/c6qo00767h] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A facile and efficient method for the synthesis of a variety of allenylphosphine oxides by silver-catalyzed phosphonylation of unprotected propargylic alcohols with P(O)H compounds has been established.
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Affiliation(s)
- Liu-Liang Mao
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Yong-Hong Li
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Shang-Dong Yang
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou 730000
- P. R. China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
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21
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Siva Kumari AL, Siva Reddy A, Swamy KCK. Transition Metal-Free Cascade Cyclization of Epoxy-Ynamides: To Go for 1,3-Oxazines or 1,4-Oxazines? Org Lett 2016; 18:5752-5755. [DOI: 10.1021/acs.orglett.6b03047] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- A. Leela Siva Kumari
- School of Chemistry, University of Hyderabad, Hyderabad-500046, Telangana, India
| | - Alla Siva Reddy
- School of Chemistry, University of Hyderabad, Hyderabad-500046, Telangana, India
| | - K. C. Kumara Swamy
- School of Chemistry, University of Hyderabad, Hyderabad-500046, Telangana, India
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22
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Kumarswamyreddy N, Kesavan V. Stereoselective and Regioselective Assembly of Spirooxindole [2,1-b]furan Motifs through a Tandem Friedel-Crafts Alkylation/5-exo-dig-Cyclization. European J Org Chem 2016. [DOI: 10.1002/ejoc.201601030] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Nandarapu Kumarswamyreddy
- Chemical Biology Laboratory; Department of Biotechnology; Indian Institute of Technology Madras; Bhupat and Jyoti Mehta School of Biosciences; Chennai 600036 India
| | - Venkitasamy Kesavan
- Chemical Biology Laboratory; Department of Biotechnology; Indian Institute of Technology Madras; Bhupat and Jyoti Mehta School of Biosciences; Chennai 600036 India
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23
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Chen L, Yu L, Deng Y, Cui Y, Bian G, Cao J. Synthesis of α-haloenamides via zinc halide mediated direct addition of benzhydryl halides to ynamides. Org Biomol Chem 2016; 14:564-569. [PMID: 26511901 DOI: 10.1039/c5ob01950h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A regio- and stereoselective synthesis of highly substituted α-haloenamides was described via the zinc halide mediated direct addition of benzhydryl halides to ynamides under mild conditions. The products α-haloenamides were further transformed into multisubstituted enamides via Suzuki and Sonogashira cross-coupling reactions.
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Affiliation(s)
- Ling Chen
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, No. 1378, Wenyi West Road, Science Park of HZNU, Hangzhou, P.R. China.
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Lecomte M, Evano G. Harnessing the Electrophilicity of Keteniminium Ions: A Simple and Straightforward Entry to Tetrahydropyridines and Piperidines from Ynamides. Angew Chem Int Ed Engl 2016; 55:4547-51. [PMID: 26934474 PMCID: PMC5069598 DOI: 10.1002/anie.201510729] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 02/04/2016] [Indexed: 01/17/2023]
Abstract
An efficient, modular and straightforward entry to tetrahydropyridines and piperidines is reported. This reaction is based on a formal intramolecular hydroalkylation of readily available, properly substituted ynamides which, upon simple activation under acidic conditions, generate highly reactive activated keteniminium ions whose reactivity can be finely controlled to induce a remarkably efficient [1,5]-hydride shift from unactivated C-H bonds and trigger a cationic cyclization which is complete within minutes.
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Affiliation(s)
- Morgan Lecomte
- Laboratoire de Chimie Organique, Service de Chimie et PhysicoChimie Organiques, Université libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50, CP160/06, 1050, Bruxelles, Belgium
| | - Gwilherm Evano
- Laboratoire de Chimie Organique, Service de Chimie et PhysicoChimie Organiques, Université libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50, CP160/06, 1050, Bruxelles, Belgium.
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25
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Siva Reddy A, Siva Kumari AL, Saha S, Kumara Swamy KC. Palladium-Catalyzed Tandem-Cyclization of Functionalized Ynamides: An Approach to Benzosultams. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201500854] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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26
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Lecomte M, Evano G. Harnessing the Electrophilicity of Keteniminium Ions: A Simple and Straightforward Entry to Tetrahydropyridines and Piperidines from Ynamides. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201510729] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Morgan Lecomte
- Laboratoire de Chimie Organique; Service de Chimie et PhysicoChimie Organiques; Université libre de Bruxelles (ULB); Avenue F. D. Roosevelt 50, CP160/06 1050 Bruxelles Belgium
| | - Gwilherm Evano
- Laboratoire de Chimie Organique; Service de Chimie et PhysicoChimie Organiques; Université libre de Bruxelles (ULB); Avenue F. D. Roosevelt 50, CP160/06 1050 Bruxelles Belgium
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27
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Chen L, Yu L, Deng Y, Zheng ZJ, Xu Z, Cao J, Xu LW. CH Functionalization/CO Bond Cleavage of Benzyl Silyl Ethers with Ynamides for the Chemoselective Synthesis of Skeletally Diverse Compounds. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201500936] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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28
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Chen P, Song CX, Wang WS, Yu XL, Tang Y. TfOH-mediated [2 + 2 + 2] cycloadditions of ynamides with two discrete nitriles: synthesis of 4-aminopyrimidine derivatives. RSC Adv 2016. [DOI: 10.1039/c6ra11408c] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this study, a concise and atom-economical TfOH-mediated [2 + 2 + 2] cycloaddition of ynamides with two discrete nitriles is developed to synthesize multi-substituted 4-aminopyrimidine.
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Affiliation(s)
- Ping Chen
- School of Pharmaceutical Science and Technology
- Key Laboratory for Modern Drug Delivery & High-Efficiency
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Cai-xia Song
- School of Pharmaceutical Science and Technology
- Key Laboratory for Modern Drug Delivery & High-Efficiency
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Wan-shu Wang
- School of Pharmaceutical Science and Technology
- Key Laboratory for Modern Drug Delivery & High-Efficiency
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Xue-liang Yu
- School of Pharmaceutical Science and Technology
- Key Laboratory for Modern Drug Delivery & High-Efficiency
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Yu Tang
- School of Pharmaceutical Science and Technology
- Key Laboratory for Modern Drug Delivery & High-Efficiency
- Tianjin University
- Tianjin 300072
- P. R. China
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29
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Chen L, Cao J, Xu Z, Zheng ZJ, Cui YM, Xu LW. Lewis acid catalyzed [2+2] cycloaddition of ynamides and propargyl silyl ethers: synthesis of alkylidenecyclobutenones and their reactivity in ring-opening and ring expansion. Chem Commun (Camb) 2016; 52:9574-7. [DOI: 10.1039/c6cc04648g] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A family of four-membered enones, polysubstituted alkylidenecyclobutenones, were easily prepared by the Lewis acid catalyzed formal [2+2] cycloaddition of ynamides and propargyl silyl ethers.
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Affiliation(s)
- Ling Chen
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- Hangzhou 311121
- P. R. China
| | - Jian Cao
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- Hangzhou 311121
- P. R. China
| | - Zheng Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- Hangzhou 311121
- P. R. China
| | - Zhan-Jiang Zheng
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- Hangzhou 311121
- P. R. China
| | - Yu-Ming Cui
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- Hangzhou 311121
- P. R. China
| | - Li-Wen Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- Hangzhou 311121
- P. R. China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics (LICP)
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30
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Chen L, Cui YM, Xu Z, Cao J, Zheng ZJ, Xu LW. An efficient approach toward formation of polycyclic coumarin derivatives via carbocation-initiated [4+2] cycloaddition and atom-economical photo-irradiated cyclization. Chem Commun (Camb) 2016; 52:11131-4. [DOI: 10.1039/c6cc05698a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polycyclic coumarin derivatives were easily prepared by carbocation initiated [4+2] cycloaddition of propargyl silyl ethers with ynamides and fluorescent analysis-oriented photo-irradiated cyclization.
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Affiliation(s)
- Ling Chen
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- Hangzhou 311121
- P. R. China
| | - Yu-Ming Cui
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- Hangzhou 311121
- P. R. China
| | - Zheng Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- Hangzhou 311121
- P. R. China
| | - Jian Cao
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- Hangzhou 311121
- P. R. China
| | - Zhan-Jiang Zheng
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- Hangzhou 311121
- P. R. China
| | - Li-Wen Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- Hangzhou 311121
- P. R. China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics (LICP)
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31
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Yeh MCP, Liang CJ, Chen HF, Weng YT. Indium(III)-Catalyzed Cyclization of Aromatic 5-Enynamides: Facile Synthesis of 2-Aminonaphthalenes, 2-Amino-1H-indenes, and 2,3-Dihydro-1H-indeno[2,1-b]pyridines. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500449] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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32
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Liu H, Yang Y, Wang S, Wu J, Wang XN, Chang J. Synthesis of 3-Substituted 2-Aminochromones via Sn(IV)-Promoted Annulation of Ynamides with 2-Methoxyaroyl Chlorides. Org Lett 2015; 17:4472-5. [PMID: 26332185 DOI: 10.1021/acs.orglett.5b02137] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A Sn(IV)-promoted annulation reaction of ynamides is described for the efficient synthesis of 3-substituted 2-aminochromones under mild conditions. This novel method allows for a concomitant construction of C-C and C-O bonds between ynamides and 2-methoxyaroyl chlorides by a tandem Friedel-Crafts acylation/oxo-Michael addition/elimination strategy.
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Affiliation(s)
- Hongxu Liu
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, School of Pharmaceutical Sciences, and College of Chemistry and Molecular Engineering, Zhengzhou University , Zhengzhou, Henan 450001, P. R. China
| | - Yanyan Yang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, School of Pharmaceutical Sciences, and College of Chemistry and Molecular Engineering, Zhengzhou University , Zhengzhou, Henan 450001, P. R. China
| | - Shen Wang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, School of Pharmaceutical Sciences, and College of Chemistry and Molecular Engineering, Zhengzhou University , Zhengzhou, Henan 450001, P. R. China
| | - Jie Wu
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, School of Pharmaceutical Sciences, and College of Chemistry and Molecular Engineering, Zhengzhou University , Zhengzhou, Henan 450001, P. R. China
| | - Xiao-Na Wang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, School of Pharmaceutical Sciences, and College of Chemistry and Molecular Engineering, Zhengzhou University , Zhengzhou, Henan 450001, P. R. China
| | - Junbiao Chang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, School of Pharmaceutical Sciences, and College of Chemistry and Molecular Engineering, Zhengzhou University , Zhengzhou, Henan 450001, P. R. China
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33
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Ding R, Li Y, Tao C, Cheng B, Zhai H. Stereoselective Synthesis of (2Z)-2,4-Dienamides via NBS-Mediated Allyloxyl Addition-Claisen Rearrangement-Dehydrobromination Cascade Reaction of Ynsulfonamides. Org Lett 2015; 17:3994-7. [PMID: 26270391 DOI: 10.1021/acs.orglett.5b01859] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An NBS-promoted allyloxyl addition-Claisen rearrangement-dehydrobromination cascade reaction has been developed. More than 20 substituted alkynylsulfonamides were reacted with allyl alcohols to generate (2Z)-2,4-dienamides in moderate to high yields. A mechanistic model has been proposed to account for the overall reaction sequence including the stereochemical outcome. Theoretical calculations suggested that a [3,3] sigmatropic rearrangement be the rate-limiting step.
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Affiliation(s)
- Runbo Ding
- †The State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, China
| | - Yun Li
- †The State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, China
| | - Cheng Tao
- †The State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, China
| | - Bin Cheng
- †The State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, China
| | - Hongbin Zhai
- †The State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, China.,‡Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
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34
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Kang B, Lee MH, Kim M, Hwang J, Kim HB, Chi DY. Transition-Metal-Free Synthesis of 2-Substituted Methyl Benzo[b]furan-3-carboxylates. J Org Chem 2015; 80:8254-61. [DOI: 10.1021/acs.joc.5b01311] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Byungsoo Kang
- Department
of Chemistry, Sogang University, 35 Baekbeomro Mapogu, Seoul 121-742, Korea
| | - Min Hyung Lee
- Department
of Chemistry, Sogang University, 35 Baekbeomro Mapogu, Seoul 121-742, Korea
| | - Mijung Kim
- Department
of Chemistry, Sogang University, 35 Baekbeomro Mapogu, Seoul 121-742, Korea
| | - Jungwoon Hwang
- Department
of Chemistry, Sogang University, 35 Baekbeomro Mapogu, Seoul 121-742, Korea
| | - Hyeong Baik Kim
- Department
of Chemistry, Sogang University, 35 Baekbeomro Mapogu, Seoul 121-742, Korea
| | - Dae Yoon Chi
- Department
of Chemistry, Sogang University, 35 Baekbeomro Mapogu, Seoul 121-742, Korea
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35
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Yu L, Deng Y, Cao J. Regioselective Synthesis of Highly Substituted Imidazoles via the Sequential Reaction of Allenyl Sulfonamides and Amines. J Org Chem 2015; 80:4729-35. [PMID: 25853897 DOI: 10.1021/acs.joc.5b00141] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel synthesis of imidazoles from electron-withdrawing group-substituted allenyl sulfonamides with amines was developed. The 4- and 5-functionalized imidazoles were constructed regioselectively, which depended on the substituents on the nitrogen atoms.
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Affiliation(s)
- Lian Yu
- Key Laboratory of Organosilicon Chemistry and Material Technology of the Ministry of Education, Hangzhou Normal University, Wenyi Road 222, Hangzhou 310012, People's Republic of China
| | - Yuan Deng
- Key Laboratory of Organosilicon Chemistry and Material Technology of the Ministry of Education, Hangzhou Normal University, Wenyi Road 222, Hangzhou 310012, People's Republic of China
| | - Jian Cao
- Key Laboratory of Organosilicon Chemistry and Material Technology of the Ministry of Education, Hangzhou Normal University, Wenyi Road 222, Hangzhou 310012, People's Republic of China
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36
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Chen X, Shen D, Wang Q, Yang Y, Yu B. ortho-(Methyltosylaminoethynyl)benzyl glycosides as new glycosyl donors for latent-active glycosylation. Chem Commun (Camb) 2015; 51:13957-60. [DOI: 10.1039/c5cc05651a] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A new glycosylation protocol with ortho-(methyltosylaminoethynyl)benzyl glycosides as donors is disclosed.
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Affiliation(s)
- Xiaoping Chen
- State Key Laboratory of Bio-organic and Natural Products Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Dacheng Shen
- State Key Laboratory of Bio-organic and Natural Products Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Qiaoling Wang
- State Key Laboratory of Bio-organic and Natural Products Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - You Yang
- Shanghai Key Laboratory of New Drug Design
- School of Pharmacy
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Biao Yu
- State Key Laboratory of Bio-organic and Natural Products Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
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37
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Li H, Ma T, Li X, Zhao Z. Regio- and stereoselective synthesis of ensulfonamides/enamides via catalyst-free intermolecular addition of indoles/pyrroles/imidazole to allenamides. RSC Adv 2015. [DOI: 10.1039/c5ra10569b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
A catalyst-free intermolecular addition of indoles, pyrroles, and imidazole to allenamides is reported. The reaction proceeds smoothly and provides a series of (E)-ensulfonamide/enamide derivatives in high yields with excellent regioselectivity.
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Affiliation(s)
- Honghe Li
- College of Chemistry and Environmental Protection Engineering
- Southwest University for Nationalities
- Chengdu 610041
- PR China
| | - Ting Ma
- College of Chemistry and Environmental Protection Engineering
- Southwest University for Nationalities
- Chengdu 610041
- PR China
| | - Xiaoxiao Li
- College of Chemistry and Environmental Protection Engineering
- Southwest University for Nationalities
- Chengdu 610041
- PR China
| | - Zhigang Zhao
- College of Chemistry and Environmental Protection Engineering
- Southwest University for Nationalities
- Chengdu 610041
- PR China
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38
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Yamaoka Y, Yoshida T, Shinozaki M, Yamada KI, Takasu K. Development of a Brønsted Acid-Promoted Arene–Ynamide Cyclization toward the Total Syntheses of Marinoquinolines A and C and Aplidiopsamine A. J Org Chem 2014; 80:957-64. [DOI: 10.1021/jo502467m] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Yousuke Yamaoka
- Graduate
School of Pharmaceutical
Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Takahiro Yoshida
- Graduate
School of Pharmaceutical
Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Makiko Shinozaki
- Graduate
School of Pharmaceutical
Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Ken-ichi Yamada
- Graduate
School of Pharmaceutical
Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Kiyosei Takasu
- Graduate
School of Pharmaceutical
Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
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39
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Yang Y, Wang L, Zhang F, Zhu G. Preparation of (Z)-α,β-disubstituted enamides via palladium-catalyzed addition of boronic acids to ynamides. J Org Chem 2014; 79:9319-24. [PMID: 25229505 DOI: 10.1021/jo501894j] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A Pd-catalyzed, highly regio- and stereoselective addition of boronic acids to ynamides has been realized. This protocol generates (Z)-α,β-disubstituted enamides in high yields with excellent regio- and stereoselectivity under the mild reaction conditions, thereby providing a good complementary method for the diverse synthesis of multifunctional enamides. A wide collection of functional groups are found to be tolerated. It represents a straightforward and useful means to assemble stereodefined enamides from readily available starting materials.
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Affiliation(s)
- Yuanfa Yang
- Department of Chemistry, Zhejiang Normal University , 688 Yingbin Road, Jinhua 321004, China
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40
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Theunissen C, Métayer B, Henry N, Compain G, Marrot J, Martin-Mingot A, Thibaudeau S, Evano G. Keteniminium Ion-Initiated Cascade Cationic Polycyclization. J Am Chem Soc 2014; 136:12528-31. [DOI: 10.1021/ja504818p] [Citation(s) in RCA: 105] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Cédric Theunissen
- Laboratoire
de Chimie Organique, Service de Chimie et PhysicoChimie Organiques, Université Libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50, CP160/06, 1050 Brussels, Belgium
| | - Benoît Métayer
- Superacid
Group in “Organic Synthesis” Team, Université de Poitiers, CNRS UMR 7285 IC2MP, Bât. B28, 4 rue Michel Brunet, TSA 51106, 86073 Poitiers Cedex 09, France
| | - Nicolas Henry
- Laboratoire
de Chimie Organique, Service de Chimie et PhysicoChimie Organiques, Université Libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50, CP160/06, 1050 Brussels, Belgium
| | - Guillaume Compain
- Superacid
Group in “Organic Synthesis” Team, Université de Poitiers, CNRS UMR 7285 IC2MP, Bât. B28, 4 rue Michel Brunet, TSA 51106, 86073 Poitiers Cedex 09, France
| | - Jérome Marrot
- Institut
Lavoisier de Versailles, UMR CNRS 8180, Université de Versailles Saint-Quentin en Yvelines, 45 avenue des Etats-Unis, 78035 Versailles Cedex, France
| | - Agnès Martin-Mingot
- Superacid
Group in “Organic Synthesis” Team, Université de Poitiers, CNRS UMR 7285 IC2MP, Bât. B28, 4 rue Michel Brunet, TSA 51106, 86073 Poitiers Cedex 09, France
| | - Sébastien Thibaudeau
- Superacid
Group in “Organic Synthesis” Team, Université de Poitiers, CNRS UMR 7285 IC2MP, Bât. B28, 4 rue Michel Brunet, TSA 51106, 86073 Poitiers Cedex 09, France
| | - Gwilherm Evano
- Laboratoire
de Chimie Organique, Service de Chimie et PhysicoChimie Organiques, Université Libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50, CP160/06, 1050 Brussels, Belgium
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41
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Okitsu T, Nakata K, Nishigaki K, Michioka N, Karatani M, Wada A. Iodocyclization of Ethoxyethyl Ethers to Ynamides: An Immediate Construction to Benzo[b]furans. J Org Chem 2014; 79:5914-20. [DOI: 10.1021/jo500903y] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Takashi Okitsu
- Department of Organic Chemistry
for Life Science, Kobe Pharmaceutical University, 4-19-1, Motoyamakita-machi, Higashinada-ku, Kobe 658-8558, Japan
| | - Kohei Nakata
- Department of Organic Chemistry
for Life Science, Kobe Pharmaceutical University, 4-19-1, Motoyamakita-machi, Higashinada-ku, Kobe 658-8558, Japan
| | - Kenji Nishigaki
- Department of Organic Chemistry
for Life Science, Kobe Pharmaceutical University, 4-19-1, Motoyamakita-machi, Higashinada-ku, Kobe 658-8558, Japan
| | - Naoyuki Michioka
- Department of Organic Chemistry
for Life Science, Kobe Pharmaceutical University, 4-19-1, Motoyamakita-machi, Higashinada-ku, Kobe 658-8558, Japan
| | - Mitsuaki Karatani
- Department of Organic Chemistry
for Life Science, Kobe Pharmaceutical University, 4-19-1, Motoyamakita-machi, Higashinada-ku, Kobe 658-8558, Japan
| | - Akimori Wada
- Department of Organic Chemistry
for Life Science, Kobe Pharmaceutical University, 4-19-1, Motoyamakita-machi, Higashinada-ku, Kobe 658-8558, Japan
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42
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Laub HA, Evano G, Mayr H. Hydrocarbierung von CC-Bindungen: Quantifizierung der nucleophilen Reaktivität von Inamiden. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201402055] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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43
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Laub HA, Evano G, Mayr H. Hydrocarbation of CC Bonds: Quantification of the Nucleophilic Reactivity of Ynamides. Angew Chem Int Ed Engl 2014; 53:4968-71. [DOI: 10.1002/anie.201402055] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Indexed: 11/11/2022]
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44
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Wang XN, Yeom HS, Fang LC, He S, Ma ZX, Kedrowski BL, Hsung RP. Ynamides in ring forming transformations. Acc Chem Res 2014; 47:560-78. [PMID: 24164363 DOI: 10.1021/ar400193g] [Citation(s) in RCA: 462] [Impact Index Per Article: 46.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The ynamide functional group activates carbon-carbontriple bonds through an attached nitrogen atom that bears an electron-withdrawing group. As a result, the alkyne has both electrophilic and nucleophilic properties. Through the selection of the electron-withdrawing group attached to nitrogen, chemists can modulate the electronic properties and reactivity of ynamides, making these groups versatile synthetic building blocks. The reactions of ynamides also lead directly to nitrogen-containing products, which provides access to important structural motifs found in natural products and molecules of medicinal interest. Therefore, researchers have invested increasing time and research in the chemistry of ynamides in recent years. This Account surveys and assesses new organic transforma-tions involving ynamides developed in our laboratory and in others around the world. We showcase the synthetic power of ynamides for rapid assembly of complex molecular structures. Among the recent reports of ynamide transformations, ring-forming reactions provide a powerful tool for generating molecular complexity quickly. In addition to their synthetic utility, such reactions are mechanistically interesting. Therefore, we focus primarily on the cyclization chemistry of ynamides. This Account highlights ynamide reactions that are useful in the rapid synthesis of cyclic and polycyclic structural manifolds. We discuss the mechanisms active in the ring formations and describe representative examples that demonstrate the scope of these reactions and provide mechanistic insights. In this discussion, we feature examples of ynamide reactions involving radical cyclizations, ring-closing metathesis, transition metal and non-transition metal mediated cyclizations, cycloaddition reactions, and rearrangements. The transformations presented rapidly introduce structural complexity and include nitrogen within or in close proximity to a newly formed ring (or rings). Thus, ynamides have emerged as powerful synthons for nitrogen-containing heterocycles and nitrogen-substituted rings, and we hope this Account will promote continued interest in the chemistry of ynamides.
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Affiliation(s)
- Xiao-Na Wang
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53705, United States
| | - Hyun-Suk Yeom
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53705, United States
| | - Li-Chao Fang
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53705, United States
| | - Shuzhong He
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53705, United States
| | - Zhi-Xiong Ma
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53705, United States
| | - Brant L. Kedrowski
- Department of Chemistry, University of Wisconsin, Oshkosh, Wisconsin 54901, United States
| | - Richard P. Hsung
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53705, United States
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Yu L, Cao J. Synthesis of α,β-unsaturated amides and iminocoumarins from N,N-disulfonyl ynamides with aldehydes via the ketenimine intermediate. Org Biomol Chem 2014; 12:3986-90. [DOI: 10.1039/c4ob00513a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Yang Y, Wang L, Zhang J, Jin Y, Zhu G. An unprecedented Pd-catalyzed trans-addition of boronic acids to ynamides. Chem Commun (Camb) 2014; 50:2347-9. [DOI: 10.1039/c3cc49069f] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An unusual Pd-catalyzed trans-addition of boronic acids to ynamides has been realized in this paper, providing α,β-disubstituted enamides in good yields with excellent regio- and stereoselectivity.
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Affiliation(s)
- Yuanfa Yang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Zhejiang Normal University
- Jinhua 321004, China
| | - Lina Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Zhejiang Normal University
- Jinhua 321004, China
| | - Jieni Zhang
- Department of Chemistry
- Zhejiang Normal University
- Jinhua 321004, China
| | - Yali Jin
- Department of Chemistry
- Zhejiang Normal University
- Jinhua 321004, China
| | - Gangguo Zhu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Zhejiang Normal University
- Jinhua 321004, China
- Department of Chemistry
- Zhejiang Normal University
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Wang XN, Hsung RP, Fox SK, Lv MC, Qi R. SYNTHESIS OF DE NOVO CHIRAL γ-AMINO-YNAMIDES USING LITHIATED YNAMIDES. OBSERVATION OF A UNIQUE 5- ENDO-DIG CYCLIZATION WITH AN INVERSION OF S-CENTER. HETEROCYCLES 2014; 88:1233-1254. [PMID: 24791059 PMCID: PMC4002055 DOI: 10.3987/com-13-s(s)88] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We describe herein details of our efforts in developing a highly stereoselective synthesis of de novo chiral γ-amino-ynamides through additions of lithiated ynamides to Ellman-Davis chiral N-tert-butanesulfinyl imines. While additions of ynamides could be highly stereoselective even without Lewis acids, the use of BF3-OEt2 completely reversed the stereoselectivity. On the other hand, additions of oxazolidinone-substituted, oxazinanone-substituted and tetrahydropyrimidinone-substituted ynamides behaved quite differently and functioned better with BF3-OEt2. The chirality of the oxazolidinone ring exerts no impact on the selectivity. This work also features a unique 5-endo-dig cyclization of oxazolidinone-substituted γ-amino-ynamides that could be promoted with acid, leading to isothiazoles and 2,3-dihydro-isothiazole S-oxides.
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Qi R, Wang XN, Dekorver KA, Tang Y, Wang CC, Li Q, Li H, Lv MC, Yu Q, Hsung RP. A Convenient Synthesis of γ-Amino-Ynamides via Additions of Lithiated Ynamides to Aryl Imines. Observation of an Aza-Meyer-Schuster Rearrangement. SYNTHESIS-STUTTGART 2013; 45:1749-1758. [PMID: 23976795 PMCID: PMC3748967 DOI: 10.1055/s-0033-1338476] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Efforts in developing an expeditious and convenient method for synthesizing γ-amino-ynamides via nucleophilic addition of lithiated ynamides to aryl imines are described. This work also features an aza-variant of a Meyer-Schuster rearrangement of γ-amino-ynamides and the synthetic utility of γ-amino-ynamides in an intramolecular ketenimine-[2 + 2] cycloaddition.
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Affiliation(s)
- Rui Qi
- School of Pharmaceutical Science and Technology, and Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, Tianjin University, Tianjin 300072 P. R. China
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Wang XN, Winston-McPherson GN, Walton MC, Zhang Y, Hsung RP, DeKorver KA. Synthesis of cyclopentenimines from N-allyl ynamides via a tandem aza-Claisen rearrangement-carbocyclization sequence. J Org Chem 2013; 78:6233-44. [PMID: 23718841 DOI: 10.1021/jo400960e] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
We describe here details of our investigations into Pd-catalyzed and thermal aza-Claisen-carbocyclizations of N-allyl ynamides to prepare a variety of α,β-unsaturated cyclopentenimines. The nature of the ynamide electron-withdrawing group and β-substituent plays critical roles in the success of this tandem cascade. With N-sulfonyl ynamides, the use of palladium catalysis is required, as facile 1,3-sulfonyl shifts dominate under thermal conditions. However, since no analogous 1,3-phosphoryl shift is operational, N-phosphoryl ynamides could be used to prepare similar cyclopentenimines under thermal conditions through zwitter ionic intermediates that undergo N-promoted H-shifts. Alternatively, by employing ynamides bearing tethered carbon nucleophiles, the zwitter ionic intermediates could be intercepted, giving rise rapidly to more complex fused bi- and tricyclic scaffolds.
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Affiliation(s)
- Xiao-Na Wang
- Division of Pharmaceutical Sciences and Department of Chemistry, 777 Highland Avenue, University of Wisconsin, Madison, Wisconsin 53705-2222, United States
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Wang XN, Hsung RP, Qi R, Fox SK, Lv MC. A highly stereoselective addition of lithiated ynamides to Ellman-Davis chiral N-tert-butanesulfinyl imines. Org Lett 2013; 15:2514-7. [PMID: 23646900 DOI: 10.1021/ol400989x] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A highly diastereoselective addition of lithiated ynamides to Ellman-Davis chiral imines is described. While additions of N-sulfonyl ynamides are highly stereoselective even without Lewis acids, the use of BF3-OEt2 completely reversed the stereoselectivity. In addition, oxazolidinone-substituted ynamides behaved differently and functioned better with BF3-OEt2, and the chirality of the oxazolidinone ring exerts no impact on the selectivity.
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Affiliation(s)
- Xiao-Na Wang
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin , Madison, Wisconsin 53705, United States
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