1
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Santhoshkumar AC, Durugappa B, Venugopal G, Banyangala M, M S AK, Somappa SB. TBD-Mediated Diastereoselective Access to Functionalized 3-Alkenyl-2-oxindoles via the Tandem Reaction of Isatins and Allenoates. J Org Chem 2024; 89:14021-14027. [PMID: 39303212 DOI: 10.1021/acs.joc.4c01427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/22/2024]
Abstract
The 1,5,7-triazabicyclo[4.4.0]dec-5-ene-mediated tandem reaction of easily accessible isatins and allenoates to functionalized 3-alkenyl-2-oxindoles is disclosed. The reaction allows the synthesis of a wide range of 3-alkenyl-2-oxindoles in good yields with excellent functional group tolerance under mild reaction conditions (32 examples, up to 84% yields). The current strategy will provide a novel path for the sustainable synthesis of functionalized 3-alkenyl-2-oxindole derivatives. We have also demonstrated the significance of 3-alkenyl-2-oxindoles as key starting materials (KSMs) via their synthetic utility in producing oxindole-appended pyrazole, oxazole, and coumarin hybrids of medicinal relevance.
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Affiliation(s)
- Athira C Santhoshkumar
- Chemical Sciences & Technology Division, CSIR-National Institute for Interdisciplinary Science & Technology (NIIST), Thiruvananthapuram 695019, Kerala, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Basavaraja Durugappa
- Chemical Sciences & Technology Division, CSIR-National Institute for Interdisciplinary Science & Technology (NIIST), Thiruvananthapuram 695019, Kerala, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Geethu Venugopal
- Chemical Sciences & Technology Division, CSIR-National Institute for Interdisciplinary Science & Technology (NIIST), Thiruvananthapuram 695019, Kerala, India
| | - Mohan Banyangala
- Chemical Sciences & Technology Division, CSIR-National Institute for Interdisciplinary Science & Technology (NIIST), Thiruvananthapuram 695019, Kerala, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Ajay Krishna M S
- Chemical Sciences & Technology Division, CSIR-National Institute for Interdisciplinary Science & Technology (NIIST), Thiruvananthapuram 695019, Kerala, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Sasidhar B Somappa
- Chemical Sciences & Technology Division, CSIR-National Institute for Interdisciplinary Science & Technology (NIIST), Thiruvananthapuram 695019, Kerala, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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2
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Chen X, Zhou XY, Liu HL, Ding C, Li JH. InCl 3/TfOH-Mediated Convenient Synthesis of 3-Alkylideneoxindoles from 2-Oxindoles with 1,3-Diones, Ketones, or Aldehydes. J Org Chem 2024; 89:4979-4989. [PMID: 38536713 DOI: 10.1021/acs.joc.4c00202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Abstract
Two efficient and convenient methods for the synthesis of 3-alkylideneoxindoles are described in this paper. The InCl3/TfOH-mediated tandem Knoevenagel condensation-deacylation sequence of various 2-oxindoles with 1,3-diones or acetoacetate furnished 3-alkylideneoxindoles in satisfactory to excellent yields (up to >99% yield). Employing the reaction system, the condensation of 2-oxindoles with ketones or aldehydes also proceeded smoothly to produce 3-alkylideneoxindoles. This protocol can be amenable to scale up. The effect of acids on this condensation reaction and intermolecular competition experiments were investigated to understand the aspect of the reaction.
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Affiliation(s)
- Xia Chen
- School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui 553004, China
| | - Xiao-Yu Zhou
- School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui 553004, China
| | - Hai-Long Liu
- School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui 553004, China
| | - Chao Ding
- School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui 553004, China
| | - Jin-Hui Li
- School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui 553004, China
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3
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Bora K, Newar UD, Maurya RA. One-Pot, Five-Component Condensation Reaction of Isatin, Secondary Amines, Malononitrile, Alcohols, and Molecular Oxygen to Access 3-Functionalized 2-Oxindoles. J Org Chem 2023; 88:14216-14221. [PMID: 37675843 DOI: 10.1021/acs.joc.3c01510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
An efficient five-component condensation reaction of isatin, malononitrile, secondary amines, alcohols, and molecular oxygen was discovered. The reaction was performed in a one-pot fashion, and it does not require any metal catalyst. It gives straightforward access to structurally diverse 2-oxo-3-aminoindoline-3-carboxylates in moderate yields (70-88%). The scope of the reaction was successfully demonstrated by synthesizing a series of 3-functionalized 2-oxindoles by varying the isatin, amine, and alcohol components.
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Affiliation(s)
- Kaushik Bora
- Applied Organic Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology (NEIST), Jorhat 785006, Assam, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Uma Devi Newar
- Applied Organic Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology (NEIST), Jorhat 785006, Assam, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Ram Awatar Maurya
- Applied Organic Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology (NEIST), Jorhat 785006, Assam, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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4
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Chen S, Huang H, Li X, Ma X, Su J, Song Q. Difluorocarbene-Enabled Synthesis of 3-Alkenyl-2-oxindoles from ortho-Aminophenylacetylenes. Org Lett 2023; 25:1178-1182. [PMID: 36757765 DOI: 10.1021/acs.orglett.3c00150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
Herein, we report a transition-metal-free [4 + 1] cyclization pathway from difluorocarbene and ortho-amino aryl alkynone, rendering an effective and universal strategy for the construction of 3-alkenyl-2-oxindoles. Our strategy starts from cheap and accessible ortho-amino aryl alkynone instead of the direct indole skeleton; moreover, in situ generated difluorocarbene from commercially available halogenated difluoroalkylative reagents enables the cleavage of a C-N bond and formation of new C-N bonds and C-C bonds.
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Affiliation(s)
- Shanglin Chen
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou 350108, Fujian, China
| | - Hua Huang
- Institute of Next Generation Matter Transformation, College of Material Sciences Engineering, Huaqiao University, Xiamen 361021, Fujian, China
| | - Xin Li
- Institute of Next Generation Matter Transformation, College of Material Sciences Engineering, Huaqiao University, Xiamen 361021, Fujian, China
| | - Xingxing Ma
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou 350108, Fujian, China
| | - Jianke Su
- Institute of Next Generation Matter Transformation, College of Material Sciences Engineering, Huaqiao University, Xiamen 361021, Fujian, China
| | - Qiuling Song
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou 350108, Fujian, China.,Institute of Next Generation Matter Transformation, College of Material Sciences Engineering, Huaqiao University, Xiamen 361021, Fujian, China.,State Key Laboratory of Organometallic Chemistry and Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China.,School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, Henan, China
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5
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Perspective: Reflections on a career in synthetic organic chemistry, 1970 to 2020. Tetrahedron 2021. [DOI: 10.1016/j.tet.2020.131820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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6
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Gopalaiah K, Tiwari A. Synthesis of (
E
)‐3‐Alkylideneindolin‐2‐ones by an Iron‐Catalyzed Aerobic Oxidative Condensation of Csp
3
–H Bonds of Oxindoles and Benzylamines. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001300] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
| | - Ankit Tiwari
- Department of Chemistry University of Delhi 110007 Delhi India
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7
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Hong Seo J, Park S, Jung Shin K. Stereoselective Synthesis of (Z)-3-Arylidene-2-oxindoles via a Palladium-Catalyzed Tandem Reaction. HETEROCYCLES 2020. [DOI: 10.3987/com-20-14340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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8
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Pratap K, Kumar A. Palladium-Catalyzed Intermolecular Dehydrogenative Carboamination of Alkenes with Amines and N-Substituted Isatin. Org Lett 2018; 20:7451-7454. [DOI: 10.1021/acs.orglett.8b03196] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kemant Pratap
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Lucknow-226031, India
- Academy of Scientific & Innovative Research (AcSIR), New Delhi, India
| | - Atul Kumar
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Lucknow-226031, India
- Academy of Scientific & Innovative Research (AcSIR), New Delhi, India
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9
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Cao CY, Zhang CC, Shi XW, Li D, Cao W, Yin X, Gao JM. Sarcodonin G Derivatives Exhibit Distinctive Effects on Neurite Outgrowth by Modulating NGF Signaling in PC12 Cells. ACS Chem Neurosci 2018; 9:1607-1615. [PMID: 29653489 DOI: 10.1021/acschemneuro.7b00488] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Sarcodonin G, one of the cyathane diterpenoids isolated from the mushroom Sarcodon scabrosus, possesses pronounced neurotrophic activity but ambiguous mechanical understanding. In this work, sarcodonin G was chosen as a lead compound to prepare a series of 19- O-benzoyl derivatives by semisynthesis and their neuritogenic activities were evaluated. 6 and 15 (10 μM) were investigated with opposite effects in PC12 cells. 6 exhibited a superior activity to sarcodonin G by promoting NGF-induced neurite outgrowth, while 15 showed an inhibitory effect. Supportingly, 6 and 15 (20 μM) significantly induced and suppressed neurite extension in primary cultured rat cortical neurons, respectively. In mechanism, the two derivatives were revealed to influence NGF-induced neurite outgrowth in PC12 cells through the regulation of PKC-dependent and -independent ERK/CREB signaling as well as the upstream TrkA receptor phosphorylation. Furthermore, a possible pattern of interaction among NGF, 6/15 and TrkA was presented using molecular simulations. It revealed that 6/15 may contribute to the stabilization of the NGF-TrkAd5 complex by establishing several hydrophobic and hydrogen-bond interactions with NGF and TrkA, respectively. Taken together, 6 and 15 modulate PKC-dependent and -independent ERK/CREB signaling pathways possibly by influencing the binding affinity of NGF to the receptor TrkA, and finally regulate neurite outgrowth in PC12 cells.
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Affiliation(s)
- Chen-Yu Cao
- Shaanxi Key Labotory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy , Northwest A&F University , Yangling 712100 , China
| | - Cheng-Chen Zhang
- Shaanxi Key Labotory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy , Northwest A&F University , Yangling 712100 , China
| | - Xin-Wei Shi
- Xi'an Botanical Garden , Institute of Botany of Shaanxi Province , Xi'an 710061 , Shaanxi China
| | - Ding Li
- Shaanxi Key Labotory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy , Northwest A&F University , Yangling 712100 , China
| | - Wei Cao
- Shaanxi Key Labotory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy , Northwest A&F University , Yangling 712100 , China
| | - Xia Yin
- Shaanxi Key Labotory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy , Northwest A&F University , Yangling 712100 , China
| | - Jin-Ming Gao
- Shaanxi Key Labotory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy , Northwest A&F University , Yangling 712100 , China
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10
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Letribot B, Delatouche R, Rouillard H, Bonnet A, Chérouvrier JR, Domon L, Besson T, Thiéry V. Synthesis of 2-Mercapto-(2-Oxoindolin-3-Ylidene)Acetonitriles from 3-(4-Chloro-5 H-1,2,3-Dithiazol-5-Ylidene)Indolin-2-ones. Molecules 2018; 23:molecules23061390. [PMID: 29890669 PMCID: PMC6100569 DOI: 10.3390/molecules23061390] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 06/04/2018] [Accepted: 06/06/2018] [Indexed: 12/02/2022] Open
Abstract
Alkylidene oxindoles are important functional moieties and building blocks in pharmaceutical and synthetic chemistry. Our interest in biologically active compounds focused our studies on the synthesis of novel oxindoles, bearing on the exocyclic double bond at the C8, CN, and S groups. Extending the potential applications of Appel’s salt, we developed a new synthetic approach by investigating the reactions of C5-substituted 2-oxindoles with 4,5-dichloro-1,2,3-dithiazolium chloride (Appel’s salt) to give original (Z)-3-(4-chloro-5H-1,2,3-dithiazol-5-ylidene)indolin-2-one derivatives, and new 2-mercapto-(2-oxoindolin-3-ylidene)acetonitriles via a dithiazole ring-opening reaction. The work described in this article represents further applications of Appel’s salt in the conception of novel heterocyclic rings, in an effort to access original bioactive compounds. Fifteen new compounds were prepared and fully characterized.
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Affiliation(s)
- Boris Letribot
- University of La Rochelle, UMR CNRS 7266 LIENSs, 17000 La Rochelle, France.
| | - Régis Delatouche
- University of La Rochelle, UMR CNRS 7266 LIENSs, 17000 La Rochelle, France.
| | - Hervé Rouillard
- University of La Rochelle, UMR CNRS 7266 LIENSs, 17000 La Rochelle, France.
| | - Antoine Bonnet
- University of La Rochelle, UMR CNRS 7266 LIENSs, 17000 La Rochelle, France.
| | | | - Lisianne Domon
- University of La Rochelle, UMR CNRS 7266 LIENSs, 17000 La Rochelle, France.
| | - Thierry Besson
- Normandie University, UNIROUEN, INSA Rouen, CNRS, COBRA UMR 6014, 76000 Rouen, France.
| | - Valérie Thiéry
- University of La Rochelle, UMR CNRS 7266 LIENSs, 17000 La Rochelle, France.
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11
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Pandya VG, Mhaske SB. Divergent Synthesis of Oxindolylidene Acetates and Spirooxindolopyrrolidones from Arynes. Org Lett 2018. [DOI: 10.1021/acs.orglett.7b03661] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Virat G. Pandya
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), CSIR-National Chemical Laboratory Campus, Pune 411008, India
| | - Santosh B. Mhaske
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), CSIR-National Chemical Laboratory Campus, Pune 411008, India
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12
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Kumar MSL, Manna SK, Maji S, Panda G. Indium triflate catalysed 3-aza-Cope rearrangement of amino acid derived α,β-unsaturated esters to alkylidene oxindoles. Org Biomol Chem 2017; 15:1762-1766. [DOI: 10.1039/c6ob02419j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The first examples of amino acid derived α,β-unsaturated esters to Z-alkylidene oxindoles via 3-aza-Cope rearrangement using In(OTf)3 are reported.
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Affiliation(s)
| | - Sudipta Kumar Manna
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031
- India
| | - Saroj Maji
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031
- India
| | - Gautam Panda
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031
- India
- Academy of Scientific and Innovative Research
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13
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Wei F, Wei L, Zhou L, Tung CH, Ma Y, Xu Z. Divergent Synthesis of 3,3-Disubstituted Oxindoles Initiated by Palladium-Catalyzed Intramolecular Arylation of Unsaturated Amides. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600235] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Fang Wei
- Key Lab for Colloid and Interface Chemistry of Education Ministry; School of Chemistry and Chemical Engineering; Shandong University; Jinan 250100 People's Republic of China
| | - Lei Wei
- Key Lab for Colloid and Interface Chemistry of Education Ministry; School of Chemistry and Chemical Engineering; Shandong University; Jinan 250100 People's Republic of China
| | - Ling Zhou
- Department of Chemistry and Biochemistry; Miami University; Oxford OH 45056 USA
| | - Chen-Ho Tung
- Key Lab for Colloid and Interface Chemistry of Education Ministry; School of Chemistry and Chemical Engineering; Shandong University; Jinan 250100 People's Republic of China
| | - Yudao Ma
- Key Lab for Colloid and Interface Chemistry of Education Ministry; School of Chemistry and Chemical Engineering; Shandong University; Jinan 250100 People's Republic of China
| | - Zhenghu Xu
- Key Lab for Colloid and Interface Chemistry of Education Ministry; School of Chemistry and Chemical Engineering; Shandong University; Jinan 250100 People's Republic of China
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; Shanghai 200032 PR China
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14
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Reddy AGK, Krishna J, Satyanarayana G. One-pot Jeffery-Heck and Reduction Sequence: Synthesis of Alcohols and Applied to the Synthesis of Flavan Natural Products. ChemistrySelect 2016. [DOI: 10.1002/slct.201600100] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Alavala Gopi Krishna Reddy
- Department of Chemistry; Indian Institute of Technology; Hyderabad; Kandi - 502 285, Sangareddy, Telangana INDIA
| | - Jonnada Krishna
- Department of Chemistry; Indian Institute of Technology; Hyderabad; Kandi - 502 285, Sangareddy, Telangana INDIA
| | - Gedu Satyanarayana
- Department of Chemistry; Indian Institute of Technology; Hyderabad; Kandi - 502 285, Sangareddy, Telangana INDIA
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15
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Fujita T, Sugiyama K, Sanada S, Ichitsuka T, Ichikawa J. Platform for Ring-Fluorinated Benzoheterole Derivatives: Palladium-Catalyzed Regioselective 1,1-Difluoroallylation and Heck Cyclization. Org Lett 2016; 18:248-51. [DOI: 10.1021/acs.orglett.5b03390] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takeshi Fujita
- Division
of Chemistry, Faculty
of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Kazuki Sugiyama
- Division
of Chemistry, Faculty
of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Shohei Sanada
- Division
of Chemistry, Faculty
of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Tomohiro Ichitsuka
- Division
of Chemistry, Faculty
of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Junji Ichikawa
- Division
of Chemistry, Faculty
of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
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16
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Ngai MH, So CL, Sullivan MB, Ho HK, Chai CLL. Photoinduced Isomerization and Hepatoxicities of Semaxanib, Sunitinib and Related 3-Substituted Indolin-2-ones. ChemMedChem 2015; 11:72-80. [DOI: 10.1002/cmdc.201500475] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Mun Hong Ngai
- Department of Pharmacy; National University of Singapore; 18 Science Drive 4 Singapore 117543 Singapore
| | - Choon Leng So
- Department of Pharmacy; National University of Singapore; 18 Science Drive 4 Singapore 117543 Singapore
| | - Michael B. Sullivan
- Institute of High-Performance Computing; Agency for Science Technology and Research, Singapore; 1 Fusionopolis Way, #16-16 Connexis Singapore 138632 Singapore
| | - Han Kiat Ho
- Department of Pharmacy; National University of Singapore; 18 Science Drive 4 Singapore 117543 Singapore
| | - Christina L. L. Chai
- Department of Pharmacy; National University of Singapore; 18 Science Drive 4 Singapore 117543 Singapore
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17
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α-Alkylidene-γ-butyrolactone synthesis via one-pot C–H insertion/olefination: substrate scope and the total synthesis of (±)-cedarmycins A and B. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.09.054] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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18
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Stereochemical implications in the synthesis of 3,3′-spirocyclopropyl oxindoles from β-aryl/alkyl-substituted alkylidene oxindoles. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.06.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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19
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Krishna J, Niharika P, Satyanarayana G. Sequential one-pot approach for the synthesis of functionalized phthalans via Heck-reduction–cyclization (HRC) reactions. RSC Adv 2015. [DOI: 10.1039/c5ra00955c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
An efficient and practical method is described for the direct synthesis of 1,3-dihydroisobenzofurans, an important structural motif present in biologically active natural or synthetic compounds.
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Affiliation(s)
- Jonnada Krishna
- Department of Chemistry
- Indian Institute of Technology (IIT), Hyderabad
- Ordnance Factory Estate Campus
- Medak District
- India
| | - Pedireddi Niharika
- Department of Chemistry
- Indian Institute of Technology (IIT), Hyderabad
- Ordnance Factory Estate Campus
- Medak District
- India
| | - Gedu Satyanarayana
- Department of Chemistry
- Indian Institute of Technology (IIT), Hyderabad
- Ordnance Factory Estate Campus
- Medak District
- India
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20
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21
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Kise N, Sasaki K, Sakurai T. Reductive coupling of isatins with ketones and aldehydes by low-valent titanium. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.10.071] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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22
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Lloyd MG, Taylor RJK, Unsworth WP. A one-pot C-H insertion/olefination sequence for the formation of α-alkylidene-γ-butyrolactones. Org Lett 2014; 16:2772-5. [PMID: 24788001 DOI: 10.1021/ol501092m] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A one-pot C-H insertion/olefination sequence for the conversion of α-diazo-α-(dialkoxyphosphoryl)acetates into α-alkylidene-γ-butyrolactones is reported. The key C-H insertion process is achieved using a catalytic amount of a dirhodium carboxylate catalyst, using operationally simple conditions. The size and electronic properties of the attached substituents were found to influence the regio- and diastereoselectivity of the process. The utility of the process is demonstrated by the synthesis of a known Staphylococcus aureus (MRSA) virulence inhibitor.
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Affiliation(s)
- Matthew G Lloyd
- Department of Chemistry, University of York , Heslington, York, YO10 5DD, U.K
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23
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An expedient synthesis of 3-alkylideneoxindoles by Ti(OiPr)4/pyridine-mediated Knoevenagel condensation. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2013.12.097] [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]
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Sequential one-pot method for oxy-Michael addition, Heck coupling, and degradation followed by condensation: facile synthesis of 2-benzoxepin-3(1H)-ones. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.09.050] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Shi R, Lu L, Zhang H, Chen B, Sha Y, Liu C, Lei A. Palladium/Copper-Catalyzed Oxidative CH Alkenylation/N-Dealkylative Carbonylation of Tertiary Anilines. Angew Chem Int Ed Engl 2013; 52:10582-5. [DOI: 10.1002/anie.201303911] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Revised: 07/08/2013] [Indexed: 12/14/2022]
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Shi R, Lu L, Zhang H, Chen B, Sha Y, Liu C, Lei A. Palladium/Copper-Catalyzed Oxidative CH Alkenylation/N-Dealkylative Carbonylation of Tertiary Anilines. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303911] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Osler JD, Unsworth WP, Taylor RJK. The Cope rearrangement of gem-dimethyl substituted divinylcyclopropanes. Org Biomol Chem 2013; 11:7587-94. [DOI: 10.1039/c3ob41617h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Lee HJ, Kim KH, Kim SH, Kim JN. Palladium-catalyzed oxidative arylation of trisubstituted olefin: an efficient synthesis of 3-(disubstituted)alkylidene-oxindoles. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.10.122] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Gopi Krishna Reddy A, Krishna J, Satyanarayana G. An efficient sequential one-pot base mediated C–O and Pd-mediated C–C bond formation: synthesis of functionalized cinnamates and isochromenes. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.08.023] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Reddy AGK, Satyanarayana G. A simple efficient sequential one-pot intermolecular aza-Michael addition and intramolecular Buchwald–Hartwig α-arylation of amines: synthesis of functionalized tetrahydroisoquinolines. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.06.106] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Chintareddy VR, Ellern A, Verkade JG. P[N(i-Bu)CH(2)CH(2)](3)N: nonionic Lewis base for promoting the room-temperature synthesis of α,β-unsaturated esters, fluorides, ketones, and nitriles using Wadsworth-Emmons phosphonates. J Org Chem 2011; 75:7166-74. [PMID: 20945858 DOI: 10.1021/jo1012515] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The bicyclic triaminophosphine P(RNCH(2)CH(2))(3)N (R = i-Bu, 1c) serves as an effective promoter for the room-temperature stereoselective synthesis of α,β-unsaturated esters, fluorides, and nitriles from a wide array of aromatic, aliphatic, heterocyclic, and cyclic aldehydes and ketones, using a range of Wadsworth-Emmons (WE) phosphonates. Among the analogues of 1c [R = Me (1a), i-Pr (1b), Bn (1d)], 1a and 1b performed well, although longer reaction times were involved, and 1d led to poorer yields than 1c. Functionalities such as cyano, chloro, bromo, methoxy, amino, ester, and nitro were well tolerated. We were able to isolate and characterize (by X-ray means; see above) the reactive WE intermediate species formed from 2b and 1c.
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Deng GB, Wang ZQ, Song RJ, Zhou MB, Wei WT, Xie P, Li JH. Synthesis of 3-(aminomethylene)-2-oxoindolines by palladium-catalyzed annulation of 3-chloro-2-iodo-N-arylacrylamides with amides or amines. Chem Commun (Camb) 2011; 47:8151-3. [DOI: 10.1039/c1cc11602a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Reddy CR, Jithender E, Krishna G, Reddy GV, Jagadeesh B. A novel acid-catalyzed C5-alkylation of oxindoles using alcohols. Org Biomol Chem 2011; 9:3940-7. [DOI: 10.1039/c0ob01144d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Saiyed AS, Bedekar AV. One-pot synthesis of stilbenes by dehydrohalogenation–Heck olefination and multicomponent Wittig–Heck reaction. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.09.050] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Miura T, Toyoshima T, Kozawa O, Murakami M. Stereoselective Synthesis of 3-(1-Cyanoalkylidene)oxindoles by Palladium-catalyzed Cyclization Reaction of 2-(Alkynyl)aryl Isocyanates with Copper(I) Cyanide. CHEM LETT 2010. [DOI: 10.1246/cl.2010.1132] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Millemaggi A, Taylor RJK. 3‐Alkenyl‐oxindoles: Natural Products, Pharmaceuticals, and Recent Synthetic Advances in Tandem/Telescoped Approaches. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000643] [Citation(s) in RCA: 269] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Alessia Millemaggi
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK http://www.york.ac.uk/chemistry/staff/academic/t‐z/rtaylor
| | - Richard J. K. Taylor
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK http://www.york.ac.uk/chemistry/staff/academic/t‐z/rtaylor
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