1
|
Kollár L, Grabrijan K, Hrast Rambaher M, Bozovičar K, Imre T, Ferenczy GG, Gobec S, Keserű GM. Boronic acid inhibitors of penicillin-binding protein 1b: serine and lysine labelling agents. J Enzyme Inhib Med Chem 2024; 39:2305833. [PMID: 38410950 PMCID: PMC10901194 DOI: 10.1080/14756366.2024.2305833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 01/08/2024] [Indexed: 02/28/2024] Open
Abstract
Penicillin-binding proteins (PBPs) contribute to bacterial cell wall biosynthesis and are targets of antibacterial agents. Here, we investigated PBP1b inhibition by boronic acid derivatives. Chemical starting points were identified by structure-based virtual screening and aliphatic boronic acids were selected for further investigations. Structure-activity relationship studies focusing on the branching of the boron-connecting carbon and quantum mechanical/molecular mechanical simulations showed that reaction barrier free energies are compatible with fast reversible covalent binding and small or missing reaction free energies limit the inhibitory activity of the investigated boronic acid derivatives. Therefore, covalent labelling of the lysine residue of the catalytic dyad was also investigated. Compounds with a carbonyl warhead and an appropriately positioned boronic acid moiety were shown to inhibit and covalently label PBP1b. Reversible covalent labelling of the catalytic lysine by imine formation and the stabilisation of the imine by dative N-B bond is a new strategy for PBP1b inhibition.
Collapse
Affiliation(s)
- Levente Kollár
- Medicinal Chemistry Research Group, Research Centre for Natural Sciences, Budapest, Hungary
- Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Budapest, Hungary
| | | | | | | | - Tímea Imre
- MS Metabolomics Research Group, Research Centre for Natural Sciences, Budapest, Hungary
| | - György G Ferenczy
- Medicinal Chemistry Research Group, Research Centre for Natural Sciences, Budapest, Hungary
| | - Stanislav Gobec
- Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - György M Keserű
- Medicinal Chemistry Research Group, Research Centre for Natural Sciences, Budapest, Hungary
- Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Budapest, Hungary
| |
Collapse
|
2
|
Kumar Gupta S, Panda N. Palladium-Catalyzed C3-Carbaldehyde Directed Regioselective C2-Thioarylation of Indoles. Chem Asian J 2024:e202400272. [PMID: 38577719 DOI: 10.1002/asia.202400272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Revised: 04/04/2024] [Accepted: 04/04/2024] [Indexed: 04/06/2024]
Abstract
Palladium-catalyzed thioarylation of indoles by diaryl disulfides in the presence of phenyliododiacetate is reported. The directing potential of weakly coordinating aldehyde group present at 3-position of indole was exploited for regioselective C2-H thioarylation over the possible C4-H functionalization. Mechanistic studies reveal that the process involves initial generation of thioaryl radical followed by sequential C-H activation, thiolate transfer, and reductive elimination.
Collapse
Affiliation(s)
- Sandip Kumar Gupta
- Department of Chemistry, National Institute of Technology, Rourkela, Odisha, 769008, India
| | - Niranjan Panda
- Department of Chemistry, National Institute of Technology, Rourkela, Odisha, 769008, India
| |
Collapse
|
3
|
Shirai T, Migitera Y, Nakajima R, Kumamoto T. Palladium-Catalyzed Reductive Heck Hydroarylation of Unactivated Alkenes Using Hydrosilane at Room Temperature. J Org Chem 2024; 89:2787-2793. [PMID: 38301250 PMCID: PMC10877589 DOI: 10.1021/acs.joc.3c02488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/28/2023] [Accepted: 01/10/2024] [Indexed: 02/03/2024]
Abstract
The reductive Heck hydroarylation of unactivated alkenes has emerged as an essential reaction for regioselective hydroarylation. Herein, we report a palladium-catalyzed reductive Heck hydroarylation of unactivated alkenes under mild conditions with enhanced functional group tolerance using hydrosilane as the reducing reagent. Under the optimal conditions, the alkylarene yields increased, resulting in minimal undesired products. Mechanistic studies using deuterated reagents indicated the involvement of two competing catalytic cycles.
Collapse
Affiliation(s)
- Takahiro Shirai
- Graduate
School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Yusuke Migitera
- School
of Pharmaceutical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Ryo Nakajima
- Graduate
School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Takuya Kumamoto
- Graduate
School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| |
Collapse
|
4
|
Sharma C, Kumari S, Sharma D, Srivastava AK, Joshi RK. Selenated NHC-Pd(II) Pincer Complex Catalyzed, Temperature-Dependent Selective Hydroamination and Oxidative Amination of Olefins: Formation of Enamine Esters and β-Amino Esters under Solvent-Free and Aerobic Conditions. J Org Chem 2024; 89:701-709. [PMID: 38084730 DOI: 10.1021/acs.joc.3c01706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
NHC-Pd(II) pincer catalyzed oxidative amination and hydroamination of olefins is developed under solvent-free aerobic conditions. Reaction offered a temperature-controlled synthesis of (Z)-enamine and β-amino esters to provide easy access and remarkable functional group tolerance for a variety of enamines. The developed approach renders an opportunity of scalability and flexibility, and besides this, the produced enamines can be transformed into many N-containing heterocycles, underscoring its potential usage in synthetic and pharmaceutical chemistry. Moreover, it is the first report for coupling of aniline with styrene.
Collapse
Affiliation(s)
- Charu Sharma
- Department of Chemistry Malaviya National Institute of Technology Jaipur, JLN Marg, Jaipur 302017, Rajasthan, India
| | - Sangeeta Kumari
- Department of Chemistry Malaviya National Institute of Technology Jaipur, JLN Marg, Jaipur 302017, Rajasthan, India
| | - Deepak Sharma
- Department of Chemistry Malaviya National Institute of Technology Jaipur, JLN Marg, Jaipur 302017, Rajasthan, India
| | - Avinash K Srivastava
- Department of Chemistry Malaviya National Institute of Technology Jaipur, JLN Marg, Jaipur 302017, Rajasthan, India
| | - Raj K Joshi
- Department of Chemistry Malaviya National Institute of Technology Jaipur, JLN Marg, Jaipur 302017, Rajasthan, India
| |
Collapse
|
5
|
Ren J, Xu J, Kong X, Li J, Li K. Coordinating activation strategy enables 1,2-alkylamidation of alkynes. Chem Sci 2023; 14:11466-11473. [PMID: 37886104 PMCID: PMC10599465 DOI: 10.1039/d3sc03786j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Accepted: 09/27/2023] [Indexed: 10/28/2023] Open
Abstract
The radical 1,2-difunctionalization reaction of alkynes has been evolved into a versatile approach for expeditiously increasing the complexity of the common feedstock alkyne. However, intermolecular 1,2-carboamidation with general alkyl groups is an unsolved problem. Herein, we show that a coordinating activation strategy could act as an efficient tool for enabling radical 1,2-alkylamidation of alkynes. With the employment of diacyl peroxides as both alkylating reagents and internal oxidants, a large library of β-alkylated enamides is constructed in a three-component manner from readily accessible amides and alkynes. This protocol exhibits broad substrate scope with good functional group compatibility and is amenable for late-stage functionalization of natural molecules and biologically compounds.
Collapse
Affiliation(s)
- Jing Ren
- Biopharmaceutical Research Institute, West China Hospital of Sichuan University 37 Guoxue Alley Chengdu 610041 P. R. China
| | - Junhua Xu
- Biopharmaceutical Research Institute, West China Hospital of Sichuan University 37 Guoxue Alley Chengdu 610041 P. R. China
| | - Xiangxiang Kong
- Biopharmaceutical Research Institute, West China Hospital of Sichuan University 37 Guoxue Alley Chengdu 610041 P. R. China
| | - Jinlong Li
- Biopharmaceutical Research Institute, West China Hospital of Sichuan University 37 Guoxue Alley Chengdu 610041 P. R. China
| | - Kaizhi Li
- Biopharmaceutical Research Institute, West China Hospital of Sichuan University 37 Guoxue Alley Chengdu 610041 P. R. China
| |
Collapse
|
6
|
Zhang Z, Fu B, Wang X, Hu Z, Liu X, Wang T, Zhao J. Synthesis of ( Z)-β-Chloro-enamides via a Base-Promoted trans-Hydroamidation of Alkynyl Chlorides Using 1,1-Dichloroalkenes as Precursor. J Org Chem 2022; 87:8764-8772. [PMID: 35686467 DOI: 10.1021/acs.joc.2c00581] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient and general base-promoted reaction of 1,1-dichloroalkenes with secondary sulfonamides and amides for the synthesis of (Z)-β-chloro-enamides has been described. This reaction exhibits functional group tolerance under simple and mild conditions. Mechanistic study indicated that a stereoselective trans-hydroamidation of alkynyl chlorides generated in situ from 1,1-dichloroalkenes was the key step.
Collapse
Affiliation(s)
- Zhenming Zhang
- National Research Center for Carbohydrate Synthesis and Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Bei Fu
- National Research Center for Carbohydrate Synthesis and Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Xiaoshuo Wang
- National Research Center for Carbohydrate Synthesis and Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Zhipeng Hu
- National Research Center for Carbohydrate Synthesis and Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Xuanling Liu
- National Research Center for Carbohydrate Synthesis and Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Tao Wang
- National Research Center for Carbohydrate Synthesis and Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Junfeng Zhao
- National Research Center for Carbohydrate Synthesis and Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China.,Key Laboratory of Molecular Target & Clinical Pharmacology and the NMPA & State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, P. R. China
| |
Collapse
|
7
|
Reyes-Bravo E, Gnecco D, Juárez JR, Orea ML, Bernès S, Aparicio DM, Terán JL. Diastereoselective synthesis of new zwitterionic bicyclic lactams, scaffolds for construction of 2-substituted-4-hydroxy piperidine and its pipecolic acid derivatives. RSC Adv 2022; 12:4187-4190. [PMID: 35425406 PMCID: PMC8981097 DOI: 10.1039/d1ra09298g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 01/21/2022] [Indexed: 11/21/2022] Open
Abstract
The synthesis of new chiral highly functionalized zwitterionic bicyclic lactams starting from acyclic β-enaminoesters derived from (R)-(-)-2-phenylglycinol is described. The key step involved an intramolecular non-classical Corey-Chaykovsky ring-closing reaction of the corresponding sulfonium salts derived from β-enaminoesters. This methodology permits the generation of two or three new stereogenic centers with high diastereoselectivity. The utility of these intermediates was demonstrated by the stereocontrolled total synthesis of cis-4-hydroxy-2-methyl piperidine and its corresponding pipecolic acid derivative.
Collapse
Affiliation(s)
- Enrique Reyes-Bravo
- Centro de QuííInstituto de Cienciasmica, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla Edif. IC-9 Complejo de Ciencias C.U. 72570 Puebla Mexico
| | - Dino Gnecco
- Centro de QuííInstituto de Cienciasmica, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla Edif. IC-9 Complejo de Ciencias C.U. 72570 Puebla Mexico
| | - Jorge R Juárez
- Centro de QuííInstituto de Cienciasmica, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla Edif. IC-9 Complejo de Ciencias C.U. 72570 Puebla Mexico
| | - María L Orea
- Centro de QuííInstituto de Cienciasmica, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla Edif. IC-9 Complejo de Ciencias C.U. 72570 Puebla Mexico
| | - Sylvain Bernès
- Instituto de Física, Benemérita Universidad Autónoma de Puebla 1IF2(aka 110-B), Lab. 102, C.U. 72570 Puebla Mexico
| | - David M Aparicio
- Centro de QuííInstituto de Cienciasmica, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla Edif. IC-9 Complejo de Ciencias C.U. 72570 Puebla Mexico
| | - Joel L Terán
- Centro de QuííInstituto de Cienciasmica, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla Edif. IC-9 Complejo de Ciencias C.U. 72570 Puebla Mexico
| |
Collapse
|
8
|
Pollack SR, Dion A. Metal-Free Stereoselective Synthesis of ( E)- and ( Z)-N-Monosubstituted β-Aminoacrylates via Condensation Reactions of Carbamates. J Org Chem 2021; 86:11748-11762. [PMID: 34479408 DOI: 10.1021/acs.joc.1c01212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
N-monosubstituted β-aminoacrylates are building blocks, which have been used in the preparation of amino acids and pharmaceuticals. Two efficient, stereoselective methods of preparation, via acid- or base-promoted condensation reactions of carbamates, are described. The base-promoted reaction is E-selective, while acid catalysis can, through the choice of solvent, selectively form E or Z. The acid-catalyzed E-selective process proceeds through a crystallization obviating the need for chromatographic purification.
Collapse
Affiliation(s)
- Scott R Pollack
- Department of Process Research & Development, MRL, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Amélie Dion
- Department of Process Research & Development, MRL, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| |
Collapse
|
9
|
Spieß P, Berger M, Kaiser D, Maulide N. Direct Synthesis of Enamides via Electrophilic Activation of Amides. J Am Chem Soc 2021; 143:10524-10529. [PMID: 34232035 PMCID: PMC8299460 DOI: 10.1021/jacs.1c04363] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Indexed: 01/02/2023]
Abstract
A novel, one-step N-dehydrogenation of amides to enamides is reported. This reaction employs the unlikely combination of LiHMDS and triflic anhydride, which serves as both the electrophilic activator and the oxidant, and is characterized by its simple setup and broad substrate scope. The synthetic utility of the formed enamides was readily demonstrated in a range of downstream transformations.
Collapse
Affiliation(s)
- Philipp Spieß
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Martin Berger
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Daniel Kaiser
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Nuno Maulide
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| |
Collapse
|
10
|
Singh R, Kaur R, Ahlawat P, Kaushik P, Singh K. Green Methods for the Synthesis of Pyrazoles: A Review. ORG PREP PROCED INT 2021. [DOI: 10.1080/00304948.2021.1904750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Raman Singh
- Department of Chemistry, Maharishi Markandeshwar (Deemed to be University) Mullana, Haryana, India
| | - Rajneesh Kaur
- Department of Chemistry, Maharishi Markandeshwar (Deemed to be University) Mullana, Haryana, India
| | - Priyanka Ahlawat
- Department of Chemistry, Maharishi Markandeshwar (Deemed to be University) Mullana, Haryana, India
| | - Parul Kaushik
- Department of Chemistry, Maharishi Markandeshwar (Deemed to be University) Mullana, Haryana, India
| | - Kuldeep Singh
- Department of Chemistry, Maharishi Markandeshwar (Deemed to be University) Mullana, Haryana, India
| |
Collapse
|
11
|
Lyu X, Zhang J, Kim D, Seo S, Chang S. Merging NiH Catalysis and Inner-Sphere Metal-Nitrenoid Transfer for Hydroamidation of Alkynes. J Am Chem Soc 2021; 143:5867-5877. [DOI: 10.1021/jacs.1c01138] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Xiang Lyu
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science, Daejeon 34141, South Korea
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea
| | - Jianbo Zhang
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science, Daejeon 34141, South Korea
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea
| | - Dongwook Kim
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science, Daejeon 34141, South Korea
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea
| | - Sangwon Seo
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science, Daejeon 34141, South Korea
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea
| | - Sukbok Chang
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science, Daejeon 34141, South Korea
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea
| |
Collapse
|
12
|
Clerc A, Marelli E, Adet N, Monot J, Martín-Vaca B, Bourissou D. Metal-ligand-Lewis acid multi-cooperative catalysis: a step forward in the Conia-ene reaction. Chem Sci 2020; 12:435-441. [PMID: 34163606 PMCID: PMC8178805 DOI: 10.1039/d0sc05036a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An original multi-cooperative catalytic approach was developed by combining metal–ligand cooperation and Lewis acid activation. The [(SCS)Pd]2 complex featuring a non-innocent indenediide-based ligand was found to be a very efficient and versatile catalyst for the Conia-ene reaction, when associated with Mg(OTf)2. The reaction operates at low catalytic loadings under mild conditions with HFIP as a co-solvent. It works with a variety of substrates, including those bearing internal alkynes. It displays complete 5-exo vs. 6-endo regio-selectivity. In addition, except for the highly congested tBu-substituent, the reaction occurs with high Z vs. E stereo-selectivity, making it synthetically useful and complementary to known catalysts. An original multi-cooperative catalytic approach was developed by combining metal–ligand cooperation and Lewis acid activation.![]()
Collapse
Affiliation(s)
- Arnaud Clerc
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse (UPS), CNRS 118 route de Narbonne F-31062 Toulouse France
| | - Enrico Marelli
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse (UPS), CNRS 118 route de Narbonne F-31062 Toulouse France
| | - Nicolas Adet
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse (UPS), CNRS 118 route de Narbonne F-31062 Toulouse France
| | - Julien Monot
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse (UPS), CNRS 118 route de Narbonne F-31062 Toulouse France
| | - Blanca Martín-Vaca
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse (UPS), CNRS 118 route de Narbonne F-31062 Toulouse France
| | - Didier Bourissou
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse (UPS), CNRS 118 route de Narbonne F-31062 Toulouse France
| |
Collapse
|
13
|
Zhang Q, Hu B, Zhao Y, Zhao S, Wang Y, Zhang B, Yan S, Yu F. Synthesis of N
-Sulfonyl Pyrazoles Through Cyclization Reactions of Sulfonyl Hydrazines with Enaminones Promoted by p
-TSA. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901886] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Qiaohe Zhang
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650504 Kunming P. R. China
| | - Biao Hu
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650504 Kunming P. R. China
| | - Yuxuan Zhao
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650504 Kunming P. R. China
| | - Siyun Zhao
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650504 Kunming P. R. China
| | - Yanqin Wang
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650504 Kunming P. R. China
| | - Biao Zhang
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650504 Kunming P. R. China
| | - Shengjiao Yan
- School of Chemical Science and Technology; Yunnan University; 650500 Kunming P. R. China
| | - Fuchao Yu
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650504 Kunming P. R. China
| |
Collapse
|
14
|
Cai X, Yang M, Guo H. Tertiary Enamides: Versatile and Available Substrates in Synthetic Chemistry. Curr Org Synth 2020; 16:70-97. [PMID: 31965923 DOI: 10.2174/1570179415666181107122814] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 09/29/2018] [Accepted: 10/03/2018] [Indexed: 12/31/2022]
Abstract
BACKGROUND Enamines and their variant enamides as powerful and versatile synthons have attracted great attention in synthetic chemistry. Enamides display unique stability and reduce enaminic reactivity in view of the electron-withdrawing effect of N-acyl group. A great deal of satisfactory achievements in the synthesis and application of enamides has been made in recent years. Especially, tertiary enamides without N-H bond regarded as low reactivity of compounds in the past can act as excellent nucleophiles to react with electrophiles for the construction of various nitrous molecules. OBJECTIVE This review focuses on recent advances on tertiary enamides in the synthetic strategies and applications including addition, coupling reaction, functionalization and electro- or photo-chemical reaction. CONCLUSION Tertiary enamides as electron-deficient nucleophiles display a satisfactory balance between stability and reactivity to offer multiple opportunities for the construction of various functionalized nitrogencontaining compounds. Further exploration of the reactive mechanisms involved tertiary enamides and the development of novel and efficient transformations to generate ever more complex building blocks starting from tertiary enamides are particularly worth pursuing.
Collapse
Affiliation(s)
- Xiaohua Cai
- School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China
| | - Mengzhi Yang
- School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China
| | - Hui Guo
- School of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China
| |
Collapse
|
15
|
Divergent Reactions between Alkynes and Dibenzenesulfonimide: Selective Synthesis of Ynamides and Enamides under Metal‐Free Conditions. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900110] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
16
|
Debbarma S, Bera SS, Maji MS. Harnessing Stereospecific Z-Enamides through Silver-Free Cp*Rh(III) Catalysis by Using Isoxazoles as Masked Electrophiles. Org Lett 2019; 21:835-839. [DOI: 10.1021/acs.orglett.8b04130] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Suvankar Debbarma
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Sourav Sekhar Bera
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Modhu Sudan Maji
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| |
Collapse
|
17
|
C. Boruah R, S. Nongthombam G. Divergent Synthesis of Steroid Analogs from Steroidal β-Formylenamides, Conjugated Enones and β-Formylvinyl Halides. HETEROCYCLES 2019. [DOI: 10.3987/rev-18-898] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
|
18
|
Panda N, Sahoo K. Synthesis of 4‐Alkenyl Benzoxazoles via Pd‐catalyzed
ortho
C−H Functionalization of 2‐Amidophenols. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801272] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Niranjan Panda
- Department of ChemistryNational Institute of Technology Rourkela Odisha- 769008 India
| | - Kanchanbala Sahoo
- Department of ChemistryNational Institute of Technology Rourkela Odisha- 769008 India
| |
Collapse
|
19
|
Abstract
Protodepalladation is the redox-neutral conversion of a C-Pd(II) bond to a C-H bond promoted by a Brønsted acid. It can be viewed as the microscopic reserves of Pd(II)-mediated C-H cleavage. In the context of catalytic reaction development, protodepalladation offers a means of converting organopalladium(II) intermediates to organic products without a change in oxidation state at the metal center. Hence, when integrated into catalytic cycles, it can be a uniquely enabling elementary step. The goal of this Review is to provide an overview of protodepalladation, including exploration of different reactions types, discussion of literature examples, and analysis of mechanistic features. Our hope is that this review will stimulate other researchers in the field to pursue new applications of this underexploited step in catalysis.
Collapse
Affiliation(s)
- Miriam L. O’Duill
- School of Chemistry, NUI Galway, University Rd, Galway H91 TK33, Ireland
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Keary M. Engle
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| |
Collapse
|
20
|
Andna L, Miesch L. Trapping of N-Acyliminium Ions with Enamides: An Approach to Medium-Sized Diaza-Heterocycles. Org Lett 2018; 20:3430-3433. [PMID: 29790768 DOI: 10.1021/acs.orglett.8b01407] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Enamides equipped with N-acyliminium ion precursors were obtained through reduction of ynamides tethered to N-imides. Intramolecular TMSOTf-mediated trapping of N-acyliminium ions provided a variety of polyfunctionalized medium-sized diaza-heterocycles of putative pharmacological interest.
Collapse
Affiliation(s)
- Lucile Andna
- Laboratoire de Chimie Organique Synthétique , Institut de Chimie, CNRS-UdS, UMR 7177 , 4, rue Blaise Pascal, CS 90032 , 67081 Strasbourg , France
| | - Laurence Miesch
- Laboratoire de Chimie Organique Synthétique , Institut de Chimie, CNRS-UdS, UMR 7177 , 4, rue Blaise Pascal, CS 90032 , 67081 Strasbourg , France
| |
Collapse
|
21
|
Ricard S, Gagnon A, Daoust B. Copper-Catalyzed β-Iodovinylation of Carbamates: Expedient Access to Highly Functionalized Vinyl-Carbamates. ChemistrySelect 2018. [DOI: 10.1002/slct.201800824] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Simon Ricard
- Département de Chimie; Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal; Québec H3C 3P8 Canada
- Département de Chimie; Biochimie et Physique; Université du Québec à Trois-Rivières, Trois-Rivières; Québec G9 A 5H7 Canada
| | - Alexandre Gagnon
- Département de Chimie; Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal; Québec H3C 3P8 Canada
| | - Benoit Daoust
- Département de Chimie; Biochimie et Physique; Université du Québec à Trois-Rivières, Trois-Rivières; Québec G9 A 5H7 Canada
| |
Collapse
|
22
|
Yang T, Fan X, Zhao X, Yu W. Iron-Catalyzed Acyl Migration of Tertiary α-Azidyl Ketones: Synthetic Approach toward Enamides and Isoquinolones. Org Lett 2018; 20:1875-1879. [DOI: 10.1021/acs.orglett.8b00409] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Tonghao Yang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xing Fan
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xiaopeng Zhao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Wei Yu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| |
Collapse
|
23
|
|
24
|
Cycloaddition versus amidation in reactions of 2-amino-2-oxoethyl-phenanthrolinium ylides to activated alkynes and alkenes. CR CHIM 2018. [DOI: 10.1016/j.crci.2017.11.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
25
|
López A, Clark TB, Parra A, Tortosa M. Copper-Catalyzed Enantioselective Synthesis of β-Boron β-Amino Esters. Org Lett 2017; 19:6272-6275. [DOI: 10.1021/acs.orglett.7b02784] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Timothy B. Clark
- Department
of Chemistry and Biochemistry, University of San Diego, San Diego, California 92210, United States
| | | | | |
Collapse
|
26
|
Baldassari LL, de la Torre A, Li J, Lüdtke DS, Maulide N. Ynamide Preactivation Allows a Regio- and Stereoselective Synthesis of α,β-Disubstituted Enamides. Angew Chem Int Ed Engl 2017; 56:15723-15727. [PMID: 29032598 DOI: 10.1002/anie.201709128] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Indexed: 12/13/2022]
Abstract
A novel ynamide preactivation strategy enables the use of otherwise incompatible reagents and allows preparation of α,β-disubstituted enamides with high regio- and stereoselectivity. Mechanistic analysis reveals the intermediacy of a triflate-bound intermediate as a solution-stable, effective keteniminium reservoir, whilst still allowing subsequent addition of organometallic reagents.
Collapse
Affiliation(s)
- Lucas L Baldassari
- Institute of Chemistry, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, 91501-970, Porto Alegre, RS, Brazil
| | - Aurélien de la Torre
- Institute of Organic Chemistry, University of Vienna, Währinger Strassee 38, 1090, Vienna, Austria
| | - Jing Li
- Institute of Organic Chemistry, University of Vienna, Währinger Strassee 38, 1090, Vienna, Austria
| | - Diogo S Lüdtke
- Institute of Chemistry, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, 91501-970, Porto Alegre, RS, Brazil
| | - Nuno Maulide
- Institute of Organic Chemistry, University of Vienna, Währinger Strassee 38, 1090, Vienna, Austria
| |
Collapse
|
27
|
Baldassari LL, de la Torre A, Li J, Lüdtke DS, Maulide N. Regio- und stereoselektive Synthese α,β-disubstituierter Enamide durch Voraktivierung von Inamiden. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201709128] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Lucas L. Baldassari
- Institute of Chemistry; Universidade Federal do Rio Grande do Sul; Av. Bento Gonçalves 9500 91501-970 Porto Alegre RS Brasilien
| | - Aurélien de la Torre
- Institut für Organische Chemie; Universität Wien; Währinger Straße 38 1090 Wien Österreich
| | - Jing Li
- Institut für Organische Chemie; Universität Wien; Währinger Straße 38 1090 Wien Österreich
| | - Diogo S. Lüdtke
- Institute of Chemistry; Universidade Federal do Rio Grande do Sul; Av. Bento Gonçalves 9500 91501-970 Porto Alegre RS Brasilien
| | - Nuno Maulide
- Institut für Organische Chemie; Universität Wien; Währinger Straße 38 1090 Wien Österreich
| |
Collapse
|
28
|
Wang WS, Chen P, Tang Y. Regioselective TfOH-mediated hydroamidation of ynamides with nitriles. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.03.060] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
29
|
Panda N, Yadav SA, Giri S. Palladium-Catalyzed Oxidative Sulfamidation: A Stereoselective Synthesis for Enesulfonamides. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201601048] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Niranjan Panda
- Department of Chemistry; National Institute of Technology Rourkela; Odisha 769008 India
| | | | - Santanab Giri
- Department of Chemistry; National Institute of Technology Rourkela; Odisha 769008 India
| |
Collapse
|
30
|
Gao B, Huang H. Copper-Catalyzed Difunctionalization of Terminal Alkynes with Diazo Esters and Amines to Construct β-Enamino Esters. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600883] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Bao Gao
- Department of Chemistry; University of Science and Technology of China; Hefei 230026 People's Republic of China
| | - Hanmin Huang
- Department of Chemistry; University of Science and Technology of China; Hefei 230026 People's Republic of China
| |
Collapse
|
31
|
Takahashi O, Kirikoshi R, Manabe N. Acetic acid-catalyzed formation of N-phenylphthalimide from phthalanilic acid: a computational study of the mechanism. Int J Mol Sci 2015; 16:12174-84. [PMID: 26030675 PMCID: PMC4490437 DOI: 10.3390/ijms160612174] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 04/27/2015] [Accepted: 05/25/2015] [Indexed: 12/02/2022] Open
Abstract
In glacial acetic acid, phthalanilic acid and its monosubstituents are known to be converted to the corresponding phthalimides in relatively good yields. In this study, we computationally investigated the experimentally proposed two-step (addition-elimination or cyclization-dehydration) mechanism at the second-order Møller-Plesset perturbation (MP2) level of theory for the unsubstituted phthalanilic acid, with an explicit acetic acid molecule included in the calculations. In the first step, a gem-diol tetrahedral intermediate is formed by the nucleophilic attack of the amide nitrogen. The second step is dehydration of the intermediate to give N-phenylphthalimide. In agreement with experimental findings, the second step has been shown to be rate-determining. Most importantly, both of the steps are catalyzed by an acetic acid molecule, which acts both as proton donor and acceptor. The present findings, along with those from our previous studies, suggest that acetic acid and other carboxylic acids (in their undissociated forms) can catalyze intramolecular nucleophilic attacks by amide nitrogens and breakdown of the resulting tetrahedral intermediates, acting simultaneously as proton donor and acceptor. In other words, double proton transfers involving a carboxylic acid molecule can be part of an extensive bond reorganization process from cyclic hydrogen-bonded complexes.
Collapse
Affiliation(s)
- Ohgi Takahashi
- Faculty of Pharmaceutical Sciences, Tohoku Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan.
| | - Ryota Kirikoshi
- Faculty of Pharmaceutical Sciences, Tohoku Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan.
| | - Noriyoshi Manabe
- Faculty of Pharmaceutical Sciences, Tohoku Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan.
| |
Collapse
|
32
|
Raoufmoghaddam S. Recent advances in catalytic C-N bond formation: a comparison of cascade hydroaminomethylation and reductive amination reactions with the corresponding hydroamidomethylation and reductive amidation reactions. Org Biomol Chem 2015; 12:7179-93. [PMID: 25098332 DOI: 10.1039/c4ob00620h] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The design and catalytic implementation of tandem reactions to selectively create nitrogen-containing products under mild conditions has encountered numerous challenges in synthetic chemistry. Several known classes of homogeneously catalyzed carbon-nitrogen bond formation including hydroamination, hydroamidation, hydroaminoalkylation, hydroaminomethylation and reductive amination were reported in the literature. More recently, a new class of C-N bond formation consisting of hydroamidomethylation and reductive amidation extended the applicability of these synthetic methodologies. The tandem reactions do considerably impact on the selectivity and efficiency of synthetic strategies. This review highlights and compares selected examples of the hydroaminomethylation, reductive amination, hydroamidomethylation and reductive amidation reactions, and thus consequently reveals their potential applications in synthetic chemistry as well as chemical industries.
Collapse
Affiliation(s)
- Saeed Raoufmoghaddam
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| |
Collapse
|
33
|
Zeng R, Sheng H, Rao B, Feng Y, Wang H, Sun Y, Chen M, Zhu M. An efficient and green approach to synthesizing enamines by intermolecular hydroamination of activated alkynes. Chem Res Chin Univ 2015. [DOI: 10.1007/s40242-015-4388-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
34
|
Huang L, Arndt M, Gooßen K, Heydt H, Gooßen LJ. Late Transition Metal-Catalyzed Hydroamination and Hydroamidation. Chem Rev 2015; 115:2596-697. [DOI: 10.1021/cr300389u] [Citation(s) in RCA: 739] [Impact Index Per Article: 82.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Liangbin Huang
- Department of Chemistry, TU Kaiserslautern, Erwin-Schrödinger-Strasse Geb. 54, 67663 Kaiserslautern, Germany
| | - Matthias Arndt
- Department of Chemistry, TU Kaiserslautern, Erwin-Schrödinger-Strasse Geb. 54, 67663 Kaiserslautern, Germany
| | - Käthe Gooßen
- Department of Chemistry, TU Kaiserslautern, Erwin-Schrödinger-Strasse Geb. 54, 67663 Kaiserslautern, Germany
| | - Heinrich Heydt
- Department of Chemistry, TU Kaiserslautern, Erwin-Schrödinger-Strasse Geb. 54, 67663 Kaiserslautern, Germany
| | - Lukas J. Gooßen
- Department of Chemistry, TU Kaiserslautern, Erwin-Schrödinger-Strasse Geb. 54, 67663 Kaiserslautern, Germany
| |
Collapse
|
35
|
Takahashi O, Kirikoshi R, Manabe N. Acetic acid can catalyze succinimide formation from aspartic acid residues by a concerted bond reorganization mechanism: a computational study. Int J Mol Sci 2015; 16:1613-26. [PMID: 25588215 PMCID: PMC4307323 DOI: 10.3390/ijms16011613] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Accepted: 01/04/2015] [Indexed: 11/16/2022] Open
Abstract
Succinimide formation from aspartic acid (Asp) residues is a concern in the formulation of protein drugs. Based on density functional theory calculations using Ace-Asp-Nme (Ace = acetyl, Nme = NHMe) as a model compound, we propose the possibility that acetic acid (AA), which is often used in protein drug formulation for mildly acidic buffer solutions, catalyzes the succinimide formation from Asp residues by acting as a proton-transfer mediator. The proposed mechanism comprises two steps: cyclization (intramolecular addition) to form a gem-diol tetrahedral intermediate and dehydration of the intermediate. Both steps are catalyzed by an AA molecule, and the first step was predicted to be rate-determining. The cyclization results from a bond formation between the amide nitrogen on the C-terminal side and the side-chain carboxyl carbon, which is part of an extensive bond reorganization (formation and breaking of single bonds and the interchange of single and double bonds) occurring concertedly in a cyclic structure formed by the amide NH bond, the AA molecule and the side-chain C=O group and involving a double proton transfer. The second step also involves an AA-mediated bond reorganization. Carboxylic acids other than AA are also expected to catalyze the succinimide formation by a similar mechanism.
Collapse
Affiliation(s)
- Ohgi Takahashi
- Faculty of Pharmaceutical Sciences, Tohoku Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan.
| | - Ryota Kirikoshi
- Faculty of Pharmaceutical Sciences, Tohoku Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan.
| | - Noriyoshi Manabe
- Faculty of Pharmaceutical Sciences, Tohoku Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan.
| |
Collapse
|
36
|
Yan Z, Xu Y, Tian W. A new and concise way to enamides by fluoroalkanosulfonyl fluoride mediated Beckmann rearrangement of α,β-unsaturated ketoximes. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.10.154] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
37
|
Gold(I)-Catalyzed, Stereocontrolled Enamide Synthesis from Primary Amides and Propargyl Aldehydes Using a Tandem Strategy. Org Lett 2014; 16:6168-71. [DOI: 10.1021/ol503055x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
38
|
He G, Chen S, Wang Q, Huang H, Zhang Q, Zhang D, Zhang R, Zhu H. Studies on copper(i)-catalyzed highly regio- and stereo-selective hydroboration of alkynamides. Org Biomol Chem 2014; 12:5945-53. [DOI: 10.1039/c4ob00979g] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
39
|
Gogoi J, Gogoi P, Boruah RC. One-Pot Stereoselective Synthesis of (Z)-β-Ketoenamides from β-Halo α,β-Unsaturated Aldehydes. European J Org Chem 2014. [DOI: 10.1002/ejoc.201400007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
40
|
Ghorai MK, Talukdar R, Tiwari DP. A Route to Highly Functionalized β-Enaminoesters via a Domino Ring-Opening Cyclization/Decarboxylative Tautomerization Sequence of Donor–Acceptor Cyclopropanes with Substituted Malononitriles. Org Lett 2014; 16:2204-7. [DOI: 10.1021/ol5007218] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Manas K. Ghorai
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Ranadeep Talukdar
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Deo Prakash Tiwari
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| |
Collapse
|
41
|
|
42
|
Abstract
2,5- and 2,4,5-substituted oxazoles were prepared in one-pot by the NBS/Me2S-mediated cyclization of enamides in the presence of base.
Collapse
Affiliation(s)
- Niranjan Panda
- Department of Chemistry
- National Institute of Technology
- Rourkela-769008, India
| | | |
Collapse
|
43
|
Taneda H, Inamoto K, Kondo Y. Direct condensation of functionalized sp3 carbons with formanilides for enamine synthesis using an in situ generated HMDS amide catalyst. Chem Commun (Camb) 2014; 50:6523-5. [DOI: 10.1039/c4cc02228a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Functionalized enamines, including β-enaminoesters were synthesized using in situ generated HMDS amide bases via the combination of aminosilanes and fluoride salts.
Collapse
Affiliation(s)
- Hiroshi Taneda
- Graduate School of Pharmaceutical Sciences
- Tohoku University
- Sendai 980-8578, Japan
| | - Kiyofumi Inamoto
- Graduate School of Pharmaceutical Sciences
- Tohoku University
- Sendai 980-8578, Japan
| | - Yoshinori Kondo
- Graduate School of Pharmaceutical Sciences
- Tohoku University
- Sendai 980-8578, Japan
| |
Collapse
|
44
|
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.
Collapse
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
| |
Collapse
|
45
|
Li J, Yang S, Jiang H, Wu W, Zhao J. Palladium-Catalyzed Coupling of Alkynes with Unactivated Alkenes in Ionic Liquids: A Regio- and Stereoselective Synthesis of Functionalized 1,6-Dienes and Their Analogues. J Org Chem 2013; 78:12477-86. [DOI: 10.1021/jo402159d] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Jianxiao Li
- School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Shaorong Yang
- School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Huanfeng Jiang
- School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Wanqing Wu
- School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Jinwu Zhao
- School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| |
Collapse
|
46
|
Ji X, Huang H, Wu W, Li X, Jiang H. Palladium-Catalyzed Oxidative Coupling of Aromatic Primary Amines and Alkenes under Molecular Oxygen: Stereoselective Assembly of (Z)-Enamines. J Org Chem 2013; 78:11155-62. [DOI: 10.1021/jo402117r] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Xiaochen Ji
- School
of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
| | - Huawen Huang
- School
of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
| | - Wanqing Wu
- School
of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
| | - Xianwei Li
- School
of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
| | - Huanfeng Jiang
- School
of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
| |
Collapse
|
47
|
Panda N, Mothkuri R, Pal A, Paital AR. Copper-Catalyzed Synthesis of α-Naphthols from Enol Esters. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300503] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
48
|
Maghari S, Ramezanpour S, Balalaie S, Darvish F, Rominger F, Bijanzadeh HR. Synthesis of functionalized pseudopeptides through five-component sequential Ugi/nucleophilic reaction of N-substituted 2-alkynamides with hydrazides. J Org Chem 2013; 78:6450-6. [PMID: 23734677 DOI: 10.1021/jo4003294] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Five-component sequential Ugi/nucleophilic addition reaction of aromatic aldehydes, primary amines, propiolic acid, isocyanides, and hydrazides has been developed in order to access polyfunctional pseudopeptides. The reaction may proceed through formation of N-substituted 2-alkynamides as intermediates. This process is found to be mild and operationally simple with broad substrate scope.
Collapse
Affiliation(s)
- Shokoofeh Maghari
- Peptide Chemistry Research Center, K. N. Toosi University of Technology, P.O. Box 15875-4416 Tehran, Iran
| | | | | | | | | | | |
Collapse
|
49
|
Liang H, Ren ZH, Wang YY, Guan ZH. Copper-Catalyzed Direct Synthesis of Iodoenamides from Ketoximes. Chemistry 2013; 19:9789-94. [DOI: 10.1002/chem.201301785] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Indexed: 11/06/2022]
|
50
|
Beveridge RE, Batey RA. Total synthesis of the cytotoxic enehydrazide natural products hydrazidomycins A and B by a carbazate addition/Peterson olefination approach. Org Lett 2013; 15:3086-9. [PMID: 23734814 DOI: 10.1021/ol401275f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first total syntheses of two natural antitumor enehydrazide compounds (hydrazidomycins A and B) and a related positional isomer of hydrazidomycin B (elaiomycin B) have been accomplished in a rapid and stereocontrolled fashion using a Peterson elimination approach. A regioselective silyl epoxide ring opening reaction with Boc-carbazate followed by base-mediated Peterson siloxide elimination stereospecifically installed the key Z-enehydrazide functionality. The use of Boc-carbazate allowed for the differential functionalization of the hydrazide nitrogens.
Collapse
Affiliation(s)
- Ramsay E Beveridge
- Davenport Research Laboratories, Department of Chemistry, University of Toronto , 80 St. George Street, Toronto ON, Canada
| | | |
Collapse
|