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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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2
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Tsuzuki S, Kano T. Transsulfinamidation of Sulfinamides with Amines. Org Lett 2023; 25:6677-6681. [PMID: 37671853 DOI: 10.1021/acs.orglett.3c02534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/07/2023]
Abstract
Metal- and additive-free transsulfinamidation of N-unsubstituted sulfinamides and N-pivaloyl-protected sulfinamides with various amines is reported. With this method, both N-monosubstituted and N,N-disubstituted sulfinamides were obtained in good yields simply by heating. Preliminary experiments also indicate that alcohols can be used as nucleophiles instead of amines and can provide sulfinate esters.
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Affiliation(s)
- Saori Tsuzuki
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo Kyoto, Kyoto 606-8502, Japan
| | - Taichi Kano
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
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3
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Keereewan S, Kuhakarn C, Leowanawat P, Saithong S, Reutrakul V, Soorukram D. Diastereoselective Addition of PhSCF 2SiMe 3 to Chiral N- tert-Butanesulfinyl Ketimines Derived from Isatins: Synthesis of Enantioenriched gem-Difluoromethylenated Spiro-pyrrolidinyl and Spiro-piperidinyl Oxindoles. J Org Chem 2022; 87:15963-15985. [PMID: 36366856 DOI: 10.1021/acs.joc.2c02098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
A convenient and efficient synthetic strategy to prepare enantioenriched gem-difluoromethylenated spiro-pyrrolidinyl and spiro-piperidinyl oxindoles is described. Fluoride-mediated diastereoselective nucleophilic addition of PhSCF2SiMe3 to chiral N-tert-butanesulfinyl ketimines derived from isatins was a key step and provided diastereomeric adducts, which were readily separable. Removal of the chiral sulfinyl group followed by structural manipulation afforded chiral gem-difluoromethylenated spiro-pyrrolidinyl and spiro-piperidinyl oxindoles.
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Affiliation(s)
- Sirisuk Keereewan
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok10400, Thailand
| | - Chutima Kuhakarn
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok10400, Thailand
| | - Pawaret Leowanawat
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok10400, Thailand
| | - Saowanit Saithong
- Division of Physical Science and Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla90110, Thailand.,Medical Science Research and Innovation Institute, Research and Development Office, Prince of Songkla University, Hat Yai, Songkhla90110, Thailand
| | - Vichai Reutrakul
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok10400, Thailand
| | - Darunee Soorukram
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok10400, Thailand
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4
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Carret S, Poisson JF, Berthiol F, Achuenu C. 1,2-Additions on Chiral N-Sulfinylketimines: An Easy Access to Chiral α-Tertiary Amines. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/s-0041-1737563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AbstractChiral α-tertiary amines, a motif present in α,α-disubstituted α-amino acids, in a wide range of natural products, and many drugs and drug candidates, are important targets in organic chemistry. Among the possible strategies, 1,2-addition to chiral N-sulfinylketimines is one of the best routes to form chiral α-tertiary amines with a high level of stereoselectivity. In this review, we focus first on the addition of organometallic reagents or other nucleophiles as enols or ylides to chiral N-sulfinylketimines. Then secondly we cover a selection of applications of these additions in the synthesis of valuable biologically active compounds.1 Introduction2 1,2-Addition Reaction Methodologies2.1 Organolithium Reagent Additions2.2 Grignard Additions2.3 Organozinc Reagent Additions2.4 Organoindium Reagent Additions2.5 Organoboron Reagent Additions2.6 Strecker Reactions2.7 Palladium-Catalyzed Reactions2.8 Enols, Enolates, and Other Deprotonated Reagent Additions2.9 Ylide Additions2.10 Heteroatom Nucleophiles2.11 Miscellaneous Reactions3 Applications to the Synthesis of Biologically Active Molecules4 Conclusions
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5
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Kadota T, Sawa M, Kondo Y, Morimoto H, Ohshima T. Catalytic Enantioselective Strecker Reaction of Isatin-Derived N-Unsubstituted Ketimines. Org Lett 2021; 23:4553-4558. [PMID: 34029103 DOI: 10.1021/acs.orglett.1c01194] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A catalytic enantioselective Strecker reaction of isatin-derived N-unsubstituted ketimines directly afforded the N-unprotected α-aminonitriles with a tetrasubstituted carbon stereocenter in up to 99% ee without requiring protection/deprotection steps. One-pot Strecker reactions from the parent carbonyl compounds were also realized with comparable yields and enantioselectivities. Direct transformations of the N-unprotected α-aminonitrile products streamlined the synthesis of unnatural amino acid derivatives and achieved the shortest one-pot stereoselective routes to a biologically active compound reported to date.
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Affiliation(s)
- Tetsuya Kadota
- Graduate School of Pharmaceutical Sciences, Kyushu University, Maidashi 3-1-1 Higashi-ku, Fukuoka 812-8582, Japan
| | - Masanao Sawa
- Graduate School of Pharmaceutical Sciences, Kyushu University, Maidashi 3-1-1 Higashi-ku, Fukuoka 812-8582, Japan
| | - Yuta Kondo
- Graduate School of Pharmaceutical Sciences, Kyushu University, Maidashi 3-1-1 Higashi-ku, Fukuoka 812-8582, Japan
| | - Hiroyuki Morimoto
- Graduate School of Pharmaceutical Sciences, Kyushu University, Maidashi 3-1-1 Higashi-ku, Fukuoka 812-8582, Japan
| | - Takashi Ohshima
- Graduate School of Pharmaceutical Sciences, Kyushu University, Maidashi 3-1-1 Higashi-ku, Fukuoka 812-8582, Japan
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6
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Petasis vs. Strecker Amino Acid Synthesis: Convergence, Divergence and Opportunities in Organic Synthesis. Molecules 2021; 26:molecules26061707. [PMID: 33803879 PMCID: PMC8003338 DOI: 10.3390/molecules26061707] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 03/11/2021] [Accepted: 03/13/2021] [Indexed: 11/16/2022] Open
Abstract
α-Amino acids find widespread applications in various areas of life and physical sciences. Their syntheses are carried out by a multitude of protocols, of which Petasis and Strecker reactions have emerged as the most straightforward and most widely used. Both reactions are three-component reactions using the same starting materials, except the nucleophilic species. The differences and similarities between these two important reactions are highlighted in this review.
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7
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Foubelo F, Yus M. Chiral N-tert-Butylsulfinyl Imines: New Discoveries. CHEM REC 2020; 21:1300-1341. [PMID: 33241905 DOI: 10.1002/tcr.202000122] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 10/27/2020] [Indexed: 12/21/2022]
Abstract
In this account the reactions of chiral N-tert-butylsulfinyl imines with organometallic reagents such as organoalkaline (lithium, sodium, potassium and cesium derivatives), organomagnesium, organozinc, organoboron, organoaluminium, organoindium and organosilicon compounds is comprehensively described. The reactivity in all cases is derived to synthetic applications in order to prepare interesting organic nitrogenated molecules, especially in the field of alkaloid compounds.
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Affiliation(s)
- Francisco Foubelo
- Departamento de Química Orgánica and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080, Alicante, Spain.,Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Alicante, Apdo. 99, 03080, Alicante, Spain
| | - Miguel Yus
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Alicante, Apdo. 99, 03080, Alicante, Spain
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8
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Liu Z, Liu X, Luan N, Geng Y, Liang A, Li J, Zou D, Wu Y, Wu Y. Transition‐Metal‐Free Cross‐Coupling of Arylsilanes with DAST Reagent: Synthesis of Aromatic Sulfinamides. ChemistrySelect 2020. [DOI: 10.1002/slct.201904464] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zhenwei Liu
- College of Chemistry, Green Catalysis Center Zhengzhou University Daxue Road No.75 Zhengzhou 450000 China E-mail
| | - Xinya Liu
- College of Chemistry, Green Catalysis Center Zhengzhou University Daxue Road No.75 Zhengzhou 450000 China E-mail
| | - Nannan Luan
- College of Chemistry, Green Catalysis Center Zhengzhou University Daxue Road No.75 Zhengzhou 450000 China E-mail
| | - Yang Geng
- College of Chemistry, Green Catalysis Center Zhengzhou University Daxue Road No.75 Zhengzhou 450000 China E-mail
| | - Apeng Liang
- Tetranov Biopharm LLC. And Collaborative Innovation Center of New Drug Research and Safety Evaluation Zhengzhou 450052 China
| | - Jingya Li
- Tetranov Biopharm LLC. And Collaborative Innovation Center of New Drug Research and Safety Evaluation Zhengzhou 450052 China
| | - Dapeng Zou
- College of Chemistry, Green Catalysis Center Zhengzhou University Daxue Road No.75 Zhengzhou 450000 China E-mail
| | - Yusheng Wu
- College of Chemistry, Green Catalysis Center Zhengzhou University Daxue Road No.75 Zhengzhou 450000 China E-mail
- Tetranov Biopharm LLC. And Collaborative Innovation Center of New Drug Research and Safety Evaluation Zhengzhou 450052 China
- Tetranov International Inc. 100 Jersey Avenue, Suite A340 New Brunswick NJ 08901 USA
| | - Yangjie Wu
- College of Chemistry, Green Catalysis Center Zhengzhou University Daxue Road No.75 Zhengzhou 450000 China E-mail
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9
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Chen X, Li Z. Catalyst‐free straightforward synthesis of 3‐cyano‐3‐arylamino‐2‐oxindoles through hydrocyanation with benzoyl cyanide. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.3809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xiao Chen
- College of Chemistry and Chemical EngineeringNorthwest Normal University Lanzhou China
| | - Zheng Li
- College of Chemistry and Chemical EngineeringNorthwest Normal University Lanzhou China
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10
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Wu C, Xu M. Palladium‐Catalyzed Highly Enantioselective Arylation of Cyclic
N
‐Sulfonyl α‐Ketimino Esters towards the Synthesis of α‐Quaternary Chiral Amino Acid Derivatives. ChemCatChem 2019. [DOI: 10.1002/cctc.201901933] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Chun‐Yan Wu
- State Key Laboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of Sciences 555 Zuchongzhi Road Shanghai 201203 P. R. China
| | - Ming‐Hua Xu
- State Key Laboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of Sciences 555 Zuchongzhi Road Shanghai 201203 P. R. China
- Shenzhen Grubbs Institute and Department of ChemistrySouthern University of Science and Technology 1088 Xueyuan Boulevard Shenzhen 518055 P. R. China
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11
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Ni/NHC-catalyzed cross-coupling of methyl sulfinates and amines for direct access to sulfinamides. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.151260] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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12
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Miyagawa M, Yoshida M, Kiyota Y, Akiyama T. Enantioselective Friedel–Crafts Alkylation Reaction of Heteroarenes with N‐Unprotected Trifluoromethyl Ketimines by Means of Chiral Phosphoric Acid. Chemistry 2019; 25:5677-5681. [DOI: 10.1002/chem.201901020] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Indexed: 02/04/2023]
Affiliation(s)
- Masamichi Miyagawa
- Department of ChemistryFaculty of ScienceGakushuin University, Mejiro Toshima-ku Tokyo 171-8588 Japan
| | - Masaru Yoshida
- Department of ChemistryFaculty of ScienceGakushuin University, Mejiro Toshima-ku Tokyo 171-8588 Japan
| | - Yuki Kiyota
- Department of ChemistryFaculty of ScienceGakushuin University, Mejiro Toshima-ku Tokyo 171-8588 Japan
| | - Takahiko Akiyama
- Department of ChemistryFaculty of ScienceGakushuin University, Mejiro Toshima-ku Tokyo 171-8588 Japan
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13
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Carramiñana V, Ochoa de Retana AM, Vélez Del Burgo A, de Los Santos JM, Palacios F. Synthesis and biological evaluation of cyanoaziridine phosphine oxides and phosphonates with antiproliferative activity. Eur J Med Chem 2018; 163:736-746. [PMID: 30576904 DOI: 10.1016/j.ejmech.2018.12.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 11/30/2018] [Accepted: 12/02/2018] [Indexed: 12/15/2022]
Abstract
This work reports an efficient diastereoselective synthetic methodology for the preparation of phosphorus substituted cyanoaziridines through the nucleophilic addition of TMSCN, as cyanide source, to the C-N double bond of 2H-azirine derivatives. The aziridine ring, in these novel cyanoaziridines, can be activated by simple N-tosylation or N-acylation. In addition, the cytotoxic effect on cell lines derived from human lung adenocarcinoma (A549) and human embryonic kidney (HEK293) was also screened. N-H and N-Substituted cyanoaziridines showed excellent activity against the A549 cell line in vitro. Moreover, selectivity towards cancer cell (A549) over (HEK293), and non-malignant cells (MCR-5) has been observed.
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Affiliation(s)
- Victor Carramiñana
- Departamento de Química Orgánica I, Facultad de Farmacia and Centro de Investigaciones y Estudios Avanzados "Lucio Lascaray", University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006, Vitoria, Spain
| | - Ana M Ochoa de Retana
- Departamento de Química Orgánica I, Facultad de Farmacia and Centro de Investigaciones y Estudios Avanzados "Lucio Lascaray", University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006, Vitoria, Spain
| | - Ander Vélez Del Burgo
- Departamento de Química Orgánica I, Facultad de Farmacia and Centro de Investigaciones y Estudios Avanzados "Lucio Lascaray", University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006, Vitoria, Spain
| | - Jesús M de Los Santos
- Departamento de Química Orgánica I, Facultad de Farmacia and Centro de Investigaciones y Estudios Avanzados "Lucio Lascaray", University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006, Vitoria, Spain.
| | - Francisco Palacios
- Departamento de Química Orgánica I, Facultad de Farmacia and Centro de Investigaciones y Estudios Avanzados "Lucio Lascaray", University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006, Vitoria, Spain.
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14
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Wen C, Wu J, Ou Y, Huang Y, Zhang K, Chen Q. TBHP/TBAI-mediated oxidation of thiophenols for the synthesis of tert-butyl arylsulfinates. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.08.048] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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15
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Liu P, Lei ZL, Peng YY, Liu ZJ, Zhu FQ, Liu JT, Wu F. Diastereoselective Trifluoromethylation of Chiral α,β-UnsaturatedN-tert-Butanesulfinyl Ketimines with Ruppert-Prakash Reagent: Asymmetric Synthesis of α-Tertiary Trifluoromethyl Allylic Amines. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800625] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Peng Liu
- School of Chemical and Environmental Engineering; Shanghai Institute of Technology; 100 Haiquan Road Shanghai 201418 People's Republic of China
| | - Zhong-Liang Lei
- School of Chemical and Environmental Engineering; Shanghai Institute of Technology; 100 Haiquan Road Shanghai 201418 People's Republic of China
| | - Ying-Ying Peng
- School of Chemical and Environmental Engineering; Shanghai Institute of Technology; 100 Haiquan Road Shanghai 201418 People's Republic of China
| | - Zhen-Jiang Liu
- School of Chemical and Environmental Engineering; Shanghai Institute of Technology; 100 Haiquan Road Shanghai 201418 People's Republic of China
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 People's Republic of China
| | - Feng-Qun Zhu
- School of Chemical and Environmental Engineering; Shanghai Institute of Technology; 100 Haiquan Road Shanghai 201418 People's Republic of China
| | - Jin-Tao Liu
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 People's Republic of China
| | - Fanhong Wu
- School of Chemical and Environmental Engineering; Shanghai Institute of Technology; 100 Haiquan Road Shanghai 201418 People's Republic of China
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16
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Visible light induced hydrodifluoromethylation of alkenes derived from oxindoles with (difluoromethyl)triphenylphosphonium bromide. J Fluor Chem 2018. [DOI: 10.1016/j.jfluchem.2018.01.013] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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17
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Dai Q, Zhang J. Direct Synthesis of Sulfinamides by the Copper-Catalyzed Electrophilic Amidation of Sulfenate Anions. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701510] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Qiang Dai
- Shanghai Key Laboratory of Green Chemistry and Chemical Process, School of Chemistry and Molecular Engineering; East China Normal University; 3663 N. Zhongshan Road Shanghai 200062 People's Republic of China
| | - Junliang Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Process, School of Chemistry and Molecular Engineering; East China Normal University; 3663 N. Zhongshan Road Shanghai 200062 People's Republic of China
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18
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Punna N, Saito T, Kosobokov M, Tokunaga E, Sumii Y, Shibata N. Stereodivergent trifluoromethylation of N-sulfinylimines by fluoroform with either organic-superbase or organometallic-base. Chem Commun (Camb) 2018; 54:4294-4297. [DOI: 10.1039/c8cc01526k] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first stereodivergent trifluoromethylation of N-sulfinylimines by fluoroform is reported.
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Affiliation(s)
- Nagender Punna
- Department of Nanopharmaceutical Sciences
- Nagoya Institute of Technology
- Nagoya 466-5888
- Japan
| | - Takuya Saito
- Department of Nanopharmaceutical Sciences
- Nagoya Institute of Technology
- Nagoya 466-5888
- Japan
| | - Mikhail Kosobokov
- Department of Nanopharmaceutical Sciences
- Nagoya Institute of Technology
- Nagoya 466-5888
- Japan
| | - Etsuko Tokunaga
- Department of Nanopharmaceutical Sciences
- Nagoya Institute of Technology
- Nagoya 466-5888
- Japan
| | - Yuji Sumii
- Department of Nanopharmaceutical Sciences
- Nagoya Institute of Technology
- Nagoya 466-5888
- Japan
| | - Norio Shibata
- Department of Nanopharmaceutical Sciences
- Nagoya Institute of Technology
- Nagoya 466-5888
- Japan
- Institute of Advanced Fluorine-Containing Materials
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19
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Wang Z, Xu MH. Highly enantioselective synthesis of α-tertiary chiral amino acid derivatives through rhodium-catalyzed asymmetric arylation of cyclic N-sulfonyl α-ketimino esters. Org Biomol Chem 2018; 16:4633-4640. [DOI: 10.1039/c8ob00840j] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A simple sulfur-olefin ligand promoted Rh-catalyzed highly enantioselective arylation of cyclic α-ketimino esters with arylboronic acids is described.
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Affiliation(s)
- Zheng Wang
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- China
| | - Ming-Hua Xu
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- China
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20
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Liu Y, Zhou F, He K, Cheng T, Zhong Z, Liu Y, Yang Y. Design, synthesis and biological evaluation of 3-fluoroalkenyloxindole ring-fused 3-trifluoromethyloxindoles obtained from indoline-2,3-diones and difluoromethylene phosphabetaine. PHOSPHORUS SULFUR 2017. [DOI: 10.1080/10426507.2017.1417297] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Yi Liu
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, Sichuan, China
| | - Fuxiang Zhou
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, Sichuan, China
| | - Kuicheng He
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, Sichuan, China
| | - Ting Cheng
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, Sichuan, China
| | - Zhi Zhong
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, Sichuan, China
| | - Yingle Liu
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, Sichuan, China
- Sichuan Province Key Laboratory of Natural Products and Small molecule Synthesis, Leshan Normal University, Shizhong District, Leshan, Sichuan, China
| | - Yi Yang
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, Sichuan, China
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21
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Hajra S, Bhosale SS, Hazra A. An asymmetric acetate-Mannich reaction of chiral isatin derived ketimines and its applications. Org Biomol Chem 2017; 15:9217-9225. [PMID: 29082414 DOI: 10.1039/c7ob02407j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly efficient TMSOTf-mediated asymmetric acetate-Mannich reaction of isatin derived tert-butylsulfinyl ketimines and S-phenyl thioacetate was developed to afford the direct synthesis of indole-based β3,3-amino acid thioester with excellent selectivity (dr > 98 : 2). Syntheses of (+)-AG-041R and 3-aminopyrroloindoline have been accomplished utilizing the developed method.
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Affiliation(s)
- Saumen Hajra
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus, Raebareli Road, Lucknow 226014, India.
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22
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Yu Y, Chen Y, Wu W, Jiang H. Facile synthesis of cyanofurans via Michael-addition/cyclization of ene–yne–ketones with trimethylsilyl cyanide. Chem Commun (Camb) 2017; 53:640-643. [DOI: 10.1039/c6cc08320j] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Carbene migratory insertion? No! Ene–yne–ketones were utilized as a Michael-addition acceptor to react with TMSCN, affording a series of cyanofurans.
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Affiliation(s)
- Yue Yu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Yang Chen
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
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23
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Yang S, Bian G, Chen Z, Xia X, Zhou M, Cui C, Song L. Highly efficient synthesis of chiral quaternary 3-aminooxindoles promoted by zinc( ii) chloride via Et 2Zn-catalysed addition of Grignard reagents to isaltin-derived N-tert-butanesulfinyl ketimines. RSC Adv 2017. [DOI: 10.1039/c7ra07692d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
An approach to chiral quaternary 3-aminooxindoles via Et2Zn catalyzed diastereoselective addition of various Grignard reagents to broad isaltin-derived N-tert-butanesulfinyl ketimines promoted by zinc(ii) chloride.
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Affiliation(s)
- Shiwei Yang
- The Key Laboratory of Coal to Ethylene Glycol and Its Related Technology
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- P. R. China
| | - Guangling Bian
- The Key Laboratory of Coal to Ethylene Glycol and Its Related Technology
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- P. R. China
| | - Zhongxiang Chen
- The Key Laboratory of Coal to Ethylene Glycol and Its Related Technology
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- P. R. China
| | - Xiaohan Xia
- The Key Laboratory of Coal to Ethylene Glycol and Its Related Technology
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- P. R. China
| | - Mi Zhou
- The Key Laboratory of Coal to Ethylene Glycol and Its Related Technology
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- P. R. China
| | - Caiyan Cui
- The Key Laboratory of Coal to Ethylene Glycol and Its Related Technology
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- P. R. China
| | - Ling Song
- The Key Laboratory of Coal to Ethylene Glycol and Its Related Technology
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- P. R. China
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24
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Chen J, Wen X, Wang Y, Du F, Cai L, Peng Y. Asymmetric Mannich Reaction of Isatin-Based Ketimines with α-Diazomethylphosphonates Catalyzed by Chiral Silver Phosphate. Org Lett 2016; 18:4336-9. [DOI: 10.1021/acs.orglett.6b02095] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Jing Chen
- Key Laboratory of Applied
Chemistry of Chongqing Municipality, School of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, China
| | - Xiaojing Wen
- Key Laboratory of Applied
Chemistry of Chongqing Municipality, School of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, China
| | - Yan Wang
- Key Laboratory of Applied
Chemistry of Chongqing Municipality, School of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, China
| | - Fei Du
- Key Laboratory of Applied
Chemistry of Chongqing Municipality, School of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, China
| | - Liu Cai
- Key Laboratory of Applied
Chemistry of Chongqing Municipality, School of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, China
| | - Yungui Peng
- Key Laboratory of Applied
Chemistry of Chongqing Municipality, School of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, China
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25
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Liu Y, Zhang K, Huang Y, Pan S, Liu XQ, Yang Y, Jiang Y, Xu XH. Synthesis of 3-fluoroalkenyl-3-trifluoromethyl-2-oxindoles by the reaction of indoline-2,3-diones with difluoromethylene phosphabetaine. Chem Commun (Camb) 2016; 52:5969-72. [PMID: 27056087 DOI: 10.1039/c6cc00666c] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
An unprecedent reaction of indoline-2,3-diones and (triphenylphosphonio)difluoroacetate (PDFA) afforded novel 3-fluoroalkenyl-3-trifluoromethyl-2-oxindoles in moderate to excellent yields. These products could be transformed into other trifluoromethylated oxindole derivatives.
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Affiliation(s)
- Yingle Liu
- School of Chemistry and Pharmaceutical Engineering, Sichuan University of Science & Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan 643000, China.
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26
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Hajra S, Aziz SM, Jana B, Mahish P, Das D. Synthesis of Chiral Spiro-Aziridine Oxindoles via Aza-Corey-Chaykovsky Reaction of Isatin Derived N-tert-Butanesulfinyl Ketimines. Org Lett 2016; 18:532-5. [PMID: 26781920 DOI: 10.1021/acs.orglett.5b03564] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A general and direct strategy for the synthesis of chiral spiro-aziridine oxindoles has been developed via an aza-Corey-Chaykovsky reaction of isatin-derived N-tert-butanesulfinyl ketimines with excellent selectivity (dr = 98:2 to >99:1). The method is explored for the synthesis of chiral 3-substituted spiro-aziridine oxindoles with high (2S,3S)-selectivity over (2S,3R).
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Affiliation(s)
- Saumen Hajra
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus , Raebareli Road, Lucknow 226014, India
| | - Sk Mohammad Aziz
- Department of Chemistry, Indian Institute of Technology Kharagpur , Kharagpur 721302, India
| | - Bibekananda Jana
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus , Raebareli Road, Lucknow 226014, India.,Department of Chemistry, Indian Institute of Technology Kharagpur , Kharagpur 721302, India
| | - Prosenjit Mahish
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus , Raebareli Road, Lucknow 226014, India.,Department of Chemistry, Indian Institute of Technology Kharagpur , Kharagpur 721302, India
| | - Dhiraj Das
- Department of Chemistry, Indian Institute of Technology Kharagpur , Kharagpur 721302, India
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27
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Chen T, Cai C. Imidazolylpyridine-In(OTf)3 catalyzed enantioselective allylation of ketimines derived from isatins. Org Biomol Chem 2016; 14:5019-22. [DOI: 10.1039/c6ob00551a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
An enantioselective In(OTf)3-catalyzed allylation of ketimines derived from isatins in the presence of an imidazolylpyridine ligand is described.
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Affiliation(s)
- Tingting Chen
- College of Chemical Engineering
- Nanjing University of Science & Technology
- Nanjing
- China
| | - Chun Cai
- College of Chemical Engineering
- Nanjing University of Science & Technology
- Nanjing
- China
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28
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He Q, Wu L, Kou X, Butt N, Yang G, Zhang W. Pd(II)-Catalyzed Asymmetric Addition of Arylboronic Acids to Isatin-Derived Ketimines. Org Lett 2015; 18:288-91. [DOI: 10.1021/acs.orglett.5b03458] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Qun He
- School of Chemistry and Chemical
Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Liang Wu
- School of Chemistry and Chemical
Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Xuezhen Kou
- School of Chemistry and Chemical
Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Nicholas Butt
- School of Chemistry and Chemical
Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Guoqiang Yang
- School of Chemistry and Chemical
Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Wanbin Zhang
- School of Chemistry and Chemical
Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
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29
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Marques CS, Burke AJ. Modular Catalytic Synthesis of 3-Amino-3-aryl-2-oxindoles: Rh Catalysis with Isatin-DerivedN-Boc-Protected Ketimines. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501399] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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30
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Wei J, Sun Z. tert-Butyl Sulfoxide as a Starting Point for the Synthesis of Sulfinyl Containing Compounds. Org Lett 2015; 17:5396-9. [DOI: 10.1021/acs.orglett.5b02743] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Juhong Wei
- College
of Chemistry and
Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
| | - Zhihua Sun
- College
of Chemistry and
Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
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31
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You Y, Wu ZJ, Wang ZH, Xu XY, Zhang XM, Yuan WC. Enantioselective Synthesis of 3,3-Disubstituted Oxindoles Bearing Two Different Heteroatoms at the C3 Position by Organocatalyzed Sulfenylation and Selenenylation of 3-Pyrrolyl-oxindoles. J Org Chem 2015; 80:8470-7. [DOI: 10.1021/acs.joc.5b01491] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Yong You
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhi-Jun Wu
- Chengdu
Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
| | - Zhen-Hua Wang
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiao-Ying Xu
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| | - Xiao-Mei Zhang
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| | - Wei-Cheng Yuan
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
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32
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Lee CW, Han SJ, Virgil SC, Stoltz BM. Stereochemical evaluation of bis(phosphine) copper catalysts for the asymmetric alkylation of 3-bromooxindoles with α-arylated malonate esters. Tetrahedron 2015; 71:3666-3670. [PMID: 25983348 PMCID: PMC4429905 DOI: 10.1016/j.tet.2014.10.065] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
An improved method for the asymetric alkylation of 3-bromooxindoles with α-arylated malonate esters is described. The asymmetric alkylation demonstrated was achieved up to 70% ee utilizing a copper(II) bis(phosphine) complex.
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Affiliation(s)
- Chung Whan Lee
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena CA 91125, United States
| | - Seo-Jung Han
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena CA 91125, United States
| | - Scott C. Virgil
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena CA 91125, United States
| | - Brian M. Stoltz
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena CA 91125, United States
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33
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Aslam NA, Babu SA, Rani S, Mahajan S, Solanki J, Yasuda M, Baba A. Diastereoselective Construction of 3-Aminooxindoles with Adjacent Stereocenters: Stereocontrolled Addition of γ-Substituted Allylindiums to Isatin Ketimines. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500340] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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34
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Mohammadi Ziarani G, Moradi R, Lashgari N. Asymmetric synthesis of chiral 3,3-disubstituted oxindoles using isatin as starting material. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2015.04.011] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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35
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Liu T, Liu W, Li X, Peng F, Shao Z. Catalytic Asymmetric Construction of Vicinal Tetrasubstituted Stereocenters by the Mannich Reaction of Linear α-Substituted Monothiomalonates with Isatin N-Boc Ketimines. J Org Chem 2015; 80:4950-6. [PMID: 25897636 DOI: 10.1021/acs.joc.5b00302] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A highly diastereo- and enantioselective method for the construction of vicinal tetrasubstituted stereocenters through the first catalytic asymmetric Mannich reaction of linear α-substituted MTMs with isatin N-Boc ketimines has been developed. This protocol provides atom-economic synthesis of less accessible 3-aminooxindoles bearing vicinal tetrasubstituted stereocenters. Notably, it also constitutes the first example of stereoselective synthesis of β-amino thioesters bearing vicinal tetrasubstituted stereocenters.
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Affiliation(s)
- Teng Liu
- †Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Weiwei Liu
- †Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Xiaonian Li
- ‡Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Fangzhi Peng
- †Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Zhihui Shao
- †Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
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36
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Yu JS, Zhou J. A highly efficient Mukaiyama–Mannich reaction of N-Boc isatin ketimines and other active cyclic ketimines using difluoroenol silyl ethers catalyzed by Ph3PAuOTf. Org Biomol Chem 2015; 13:10968-72. [DOI: 10.1039/c5ob01895a] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Ph3PAuOTf catalyzed highly efficient reaction of difluoroenoxysilanes and active ketimines is reported, which represents the first Au(i)-catalyzed Mukaiyama–Mannich reaction.
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Affiliation(s)
- Jin-Sheng Yu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- China
| | - Jian Zhou
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- China
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37
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Kaur J, Chimni SS, Mahajan S, Kumar A. Stereoselective synthesis of 3-amino-2-oxindoles from isatin imines: new scaffolds for bioactivity evaluation. RSC Adv 2015. [DOI: 10.1039/c5ra06969f] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
3-Substituted-3-aminooxindole motifs constitute the core structure of a number of natural products and drug candidates.
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Affiliation(s)
- Jasneet Kaur
- Department of Chemistry
- U.G.C. Centre of Advance Studies in Chemistry
- Guru Nanak Dev University
- Amritsar
- India
| | - Swapandeep Singh Chimni
- Department of Chemistry
- U.G.C. Centre of Advance Studies in Chemistry
- Guru Nanak Dev University
- Amritsar
- India
| | - Suhel Mahajan
- Department of Chemistry
- U.G.C. Centre of Advance Studies in Chemistry
- Guru Nanak Dev University
- Amritsar
- India
| | - Akshay Kumar
- Department of Chemistry
- DAV University
- Jalandhar
- India
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38
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Chen JP, Chen WW, Li Y, Xu MH. A highly diastereoselective Friedel–Crafts reaction of indoles with isatin-derived N-sulfinyl ketimines towards the efficient synthesis of chiral tetrasubstituted 3-indolyl-3-aminooxindoles. Org Biomol Chem 2015; 13:3363-70. [DOI: 10.1039/c5ob00063g] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A Lewis acid promoted highly diastereoselective asymmetric Friedel–Crafts alkylation of indoles with isatin-derived N-tert-butanesulfinyl ketimines is described.
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Affiliation(s)
- Jian-Ping Chen
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- China
| | - Wen-Wen Chen
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- China
| | - Yi Li
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- China
| | - Ming-Hua Xu
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- China
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