1
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Mondal BD, Gorai S, Nath R, Paul A, Guin J. Enantioselective Amination of 3-Substituted-2-benzofuranones via Non-covalent N-Heterocyclic Carbene Catalysis. Chemistry 2024; 30:e202303115. [PMID: 37997460 DOI: 10.1002/chem.202303115] [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: 09/25/2023] [Revised: 11/21/2023] [Accepted: 11/22/2023] [Indexed: 11/25/2023]
Abstract
Herein, an efficient method for asymmetric α-amination of 2-benzofuranones with N-heterocyclic carbene (NHC) catalysis is reported. The process is based on non-covalent interaction of NHC with substrate, facilitating the formation of a chiral ion-pair that encompasses enolate and azolium salt. The activated enolate adds to an electrophilic amine source with sufficient facial control to furnish an enantioenriched product having an amine substituted quaternary stereocenter. The process displays a broad substrate scope. A preparative scale synthesis has been achieved. Preliminary mechanistic investigations based on experimental and DFT studies suggest a reaction pathway that involves non-covalent substrate/NHC interactions and essentially implicate the role of π-π interaction in diastereomeric transition states for stereo-chemical discrimination.
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Affiliation(s)
- Bhaskar Deb Mondal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Sadhan Gorai
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Rounak Nath
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Ankan Paul
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Joyram Guin
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
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2
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Donthoju A, Phanindrudu M, Ellandula S, Lal MR, Nanubolu JB, Chegondi R. Rh 2(II)-Catalyzed Selective C(sp 3)-H Bond Electrophilic Amination of Aryl Azide-Tethered 1,3-Dicarbonyl Compounds. Org Lett 2023; 25:7589-7594. [PMID: 37818903 DOI: 10.1021/acs.orglett.3c03067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
Herein, we report the accomplishment of Rh2(II)-catalyzed intramolecular amination of aryl azide-tethered 1,3-dicarbonyls to access privileged heterocyclic scaffolds with exclusive diastereoselectivity under simple reaction conditions. This method also allows an unconventional direct α-amination at electron-deficient C(sp3)-H bonds of aryl azide-tethered 1,3-diketones to afford fused 2-azatricyclo[4.4.0.02,8]decanones and 2,2-disubstituted indolines, which are present in several biologically active alkaloids. Kinetic isotope experiments revealed that the nucleophilic addition of enol π-bonds on the transient electrophilic rhodium-nitrenoid intermediate enables C-N bond formation.
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Affiliation(s)
- Ashok Donthoju
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | | | | | | | | | - Rambabu Chegondi
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
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3
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Lu B, Jiang X, Zeng X. Photolytic insertion of carbon monoxide into nitrosyl chloride: formation of nitrosoformyl chloride. Phys Chem Chem Phys 2022; 24:17673-17678. [PMID: 35837884 DOI: 10.1039/d2cp02913h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nitrosocarbonyls are exotic intermediates that remain scarcely characterized. By UV photolysis (365 nm) of nitrosyl chloride (ClNO) embedded in solid CO ice at 20 K, the elusive nitrosoformyl chloride (ClC(O)NO) has been synthesized via CO-insertion into the Cl-N bond in ClNO. The characterization of ClC(O)NO with matrix-isolation IR spectroscopy is supported by 13C and 15N isotope labeling and quantum chemical calculations at the B3LYP/6-311+G(3df) level of theory. Upon subsequent laser irradiation at 266 nm, CO-elimination in ClC(O)NO occurs by reformation of ClNO. In line with the calculated potential energy surface for ClC(O)NO at the CCSD(T)-F12a/aug-cc-pVTZ//B3LYP/6-311+G(3df) level, the observed IR frequencies and the corresponding isotopic shifts coincide with the calculated values for the lowest-energy planar conformer, in which the CO and NO moities adopt trans configuration with respect to the C-N bond. Furthermore, the CO-insertion in ClNO involves a stepwise pathway by first homolytic cleavage of the Cl-N bond in ClNO (→ Cl˙ + ˙NO), followed by successive CO-trapping (CO + Cl˙ → ClCO˙) and radical combination (ClCO˙ + ˙NO → ClC(O)NO) inside the solid CO-matrix cages.
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Affiliation(s)
- Bo Lu
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, Shanghai 200433, China.
| | - Xin Jiang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, Shanghai 200433, China.
| | - Xiaoqing Zeng
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, Shanghai 200433, China.
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4
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Wu Z, Krishnamurthy S, Satyanarayana Tummalapalli KS, Xu J, Yue C, Antilla JC. Enantioselective Amination of
β
‐Keto Esters Catalyzed by Chiral Calcium Phosphates. Chemistry 2022; 28:e202200907. [DOI: 10.1002/chem.202200907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Zhenwei Wu
- School of Pharmaceutical Science and Technology Institute for Molecular Design and Synthesis Tianjin University Tianjin 300072 China
| | - Suvratha Krishnamurthy
- School of Pharmaceutical Science and Technology Institute for Molecular Design and Synthesis Tianjin University Tianjin 300072 China
| | - K. S. Satyanarayana Tummalapalli
- School of Pharmaceutical Science and Technology Institute for Molecular Design and Synthesis Tianjin University Tianjin 300072 China
| | - Jun Xu
- School of Pharmaceutical Science and Technology Institute for Molecular Design and Synthesis Tianjin University Tianjin 300072 China
| | - Caizhen Yue
- School of Science Zhejiang Sci-Tech University Hangzhou City Zhejiang Province 310018 China
| | - Jon C. Antilla
- School of Pharmaceutical Science and Technology Institute for Molecular Design and Synthesis Tianjin University Tianjin 300072 China
- School of Science Zhejiang Sci-Tech University Hangzhou City Zhejiang Province 310018 China
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5
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Hwang Y, Baek SB, Kim D, Chang S. Chain Walking as a Strategy for Iridium-Catalyzed Migratory Amidation of Alkenyl Alcohols to Access α-Amino Ketones. J Am Chem Soc 2022; 144:4277-4285. [PMID: 35200026 DOI: 10.1021/jacs.2c00948] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Catalytic carbon-nitrogen bond formation in hydrocarbons is an appealing synthetic tool to access valuable nitrogen-containing compounds. Although a number of synthetic approaches have been developed to construct a bifunctional α-amino carbonyl scaffold in this realm, installation of an amino functionality at the remote and unfunctionalized aliphatic sites remains underdeveloped. Here we present a tandem iridium catalysis that enables the redox-relay amidation of alkenyl alcohols via chain walking and metal-nitrenoid transfer, which eventually offers a new route to various α-amino ketones with excellent regioselectivity. The virtue of this transformation is that an unrefined isomeric mixture of alkenyl alcohols can be utilized as the readily available starting materials to lead to the regioconvergent amidation. Mechanistic investigations revealed that the reaction proceeds via a tandem process involving two key components of redox-relay chain walking and intermolecular nitrenoid transfer with the assistance of hydrogen bonding, thus representing the competence of Ir catalysis for the olefin migratory C-N coupling with high efficiency and exquisite selectivity.
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Affiliation(s)
- Yeongyu Hwang
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea.,Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
| | - Seung Beom Baek
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea.,Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
| | - Dongwook Kim
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea.,Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
| | - Sukbok Chang
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea.,Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
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6
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Liu R, Krishnamurthy S, Wu Z, Tummalapalli KSS, Antilla JC. Chiral Calcium Phosphate Catalyzed Enantioselective Amination of 3-Aryl-2-benzofuranones. Org Lett 2020; 22:8101-8105. [PMID: 32969228 DOI: 10.1021/acs.orglett.0c03059] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A 4-tert-butyl-phenyl substituted (R)-[H8]-BINOL chiral calcium phosphate catalyzed enantioselective amination of 3-aryl-2-benzofuranones with dibenzyl azodicarboxylate is described. The catalyst loading of the reaction is 1 mol %. This transformation is facile and has a high degree atom economy, which gave products with good yields and high enantioselectivities (79% to 99%). This reaction has excellent ee and a broad substrate scope with mild reaction conditions.
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Affiliation(s)
- Ruihan Liu
- School of Pharmaceutical Sciences and Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Suvratha Krishnamurthy
- School of Pharmaceutical Sciences and Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Zhenwei Wu
- School of Pharmaceutical Sciences and Technology, Tianjin University, Tianjin 300072, P. R. China
| | | | - Jon C Antilla
- School of Pharmaceutical Sciences and Technology, Tianjin University, Tianjin 300072, P. R. China.,School of Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China
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7
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Rajmani Singh RK, Karsili TN, Srivastava R. Copper-catalyzed enantioselective direct α-C-H amination of β-dicarbonyl derivatives with aryl hydroxylamines and mechanistic insights. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.111067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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8
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Lee M, Jung H, Kim D, Park JW, Chang S. Modular Tuning of Electrophilic Reactivity of Iridium Nitrenoids for the Intermolecular Selective α-Amidation of β-Keto Esters. J Am Chem Soc 2020; 142:11999-12004. [DOI: 10.1021/jacs.0c04344] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Minhan Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Hoimin Jung
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Dongwook Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Jung-Woo Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Sukbok Chang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, Korea
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9
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Sun D, Yang S, Fang X. Asymmetric catalytic construction of fully substituted carbon stereocenters using acyclic α-branched β-ketocarbonyls: the “Methyl Rule” widely exists. Org Chem Front 2020. [DOI: 10.1039/d0qo00673d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review illustrates the recent advances in catalytic asymmetric α-functionalization of acyclic β-ketocarbonyls. A thorough survey of all these reactions indicates the existance of a general principle which is called the “Methyl Rule”.
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Affiliation(s)
- Deqian Sun
- State Key Laboratory of Structural Chemistry
- and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology
- Fujian Institute of Research on the Structure of Matter (FJIRSM)
- University of Chinese Academy of Sciences
- Fuzhou 350100
| | - Shuang Yang
- State Key Laboratory of Structural Chemistry
- and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology
- Fujian Institute of Research on the Structure of Matter (FJIRSM)
- University of Chinese Academy of Sciences
- Fuzhou 350100
| | - Xinqiang Fang
- State Key Laboratory of Structural Chemistry
- and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology
- Fujian Institute of Research on the Structure of Matter (FJIRSM)
- University of Chinese Academy of Sciences
- Fuzhou 350100
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10
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Velasco-Rubio Á, Alexy EJ, Yoritate M, Wright AC, Stoltz BM. Stereospecific Overman Rearrangement of Substituted Cyclic Vinyl Bromides: Access to Fully Substituted α-Amino Ketones. Org Lett 2019; 21:8962-8965. [PMID: 31663754 DOI: 10.1021/acs.orglett.9b03347] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A versatile thermal Overman rearrangement of enantioenriched, cyclic allylic alcohols providing tertiary allylic amines has been developed. The vinyl bromide used to control enantioselectivity in a preceding CBS reduction is utilized as a synthetic handle for the preparation of tertiary α-amino ketones and related derivatives in an asymmetric fashion.
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Affiliation(s)
- Álvaro Velasco-Rubio
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , United States
| | - Eric J Alexy
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , United States
| | - Makoto Yoritate
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , United States
| | - Austin C Wright
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , United States
| | - Brian M Stoltz
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , United States
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11
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Abstract
A boron-catalyzed α-amination of simple carboxylic acids was developed. Catalytically generated boron enolates of carboxylic acids reacted with an electrophilic aminating reagent, diisopropylazodicarboxylate, to provide amino acid derivatives. The catalysis afforded not only α-monosubstituted glycine derivatives but also α,α-disubstituted derivatives. The resulting α-aminocarboxylic acid was easily converted to carboxylic acid derivatives. Extension to a catalytic asymmetric variant was possible by introducing a chiral ligand on the boron catalyst.
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Affiliation(s)
- Takuto Morisawa
- Department of Chemistry, Faculty of Science , Hokkaido University , Kita 10 Nishi 8, Kita-ku , Sapporo , Hokkaido 060-0810 , Japan
| | - Masaya Sawamura
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) , Hokkaido University , Kita 21 Nishi 10, Kita-ku , Sapporo , Hokkaido 001-0021 , Japan.,Department of Chemistry, Faculty of Science , Hokkaido University , Kita 10 Nishi 8, Kita-ku , Sapporo , Hokkaido 060-0810 , Japan
| | - Yohei Shimizu
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) , Hokkaido University , Kita 21 Nishi 10, Kita-ku , Sapporo , Hokkaido 001-0021 , Japan.,Department of Chemistry, Faculty of Science , Hokkaido University , Kita 10 Nishi 8, Kita-ku , Sapporo , Hokkaido 060-0810 , Japan
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12
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Zhang Z, Luo Y, Du H, Xu J, Li P. Synthesis of α-heterosubstituted ketones through sulfur mediated difunctionalization of internal alkynes. Chem Sci 2019; 10:5156-5161. [PMID: 31183068 PMCID: PMC6524669 DOI: 10.1039/c9sc00568d] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 04/15/2019] [Indexed: 12/16/2022] Open
Abstract
Synthesis of α-heterosubstituted ketones was achieved through sulfur mediated difunctionalization of internal alkynes in one pot. The reaction design involves: phenyl substituted internal alkyne attacking triflic anhydride activated diphenyl sulfoxide to give a sulfonium vinyl triflate intermediate, hydrolysis to give an α-sulfonium ketone, and then substitution with various nucleophiles. This method provides a unified route to access α-amino ketones, α-acyloxy ketones, α-thio ketones, α-halo ketones, α-hydroxy ketones, and related heterocyclic structures, in a rapid fashion.
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Affiliation(s)
- Zhong Zhang
- State Key Laboratory of Chemical Resource Engineering , Department of Organic Chemistry , Faculty of Science , Beijing University of Chemical Technology , Beijing 100029 , China . ; ;
| | - Yuzheng Luo
- State Key Laboratory of Chemical Resource Engineering , Department of Organic Chemistry , Faculty of Science , Beijing University of Chemical Technology , Beijing 100029 , China . ; ;
| | - Hongguang Du
- State Key Laboratory of Chemical Resource Engineering , Department of Organic Chemistry , Faculty of Science , Beijing University of Chemical Technology , Beijing 100029 , China . ; ;
| | - Jiaxi Xu
- State Key Laboratory of Chemical Resource Engineering , Department of Organic Chemistry , Faculty of Science , Beijing University of Chemical Technology , Beijing 100029 , China . ; ;
| | - Pingfan Li
- State Key Laboratory of Chemical Resource Engineering , Department of Organic Chemistry , Faculty of Science , Beijing University of Chemical Technology , Beijing 100029 , China . ; ;
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13
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Mallik S, Bhajammanavar V, Mukherjee AP, Baidya M. Catalytic Regiodivergent Dearomatization Reaction of Nitrosocarbonyl Intermediates with β-Naphthols. Org Lett 2019; 21:2352-2355. [DOI: 10.1021/acs.orglett.9b00628] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Sumitava Mallik
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
| | - Vinod Bhajammanavar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
| | - Arka Probha Mukherjee
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
| | - Mahiuddin Baidya
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
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14
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Zhou Z, Cheng QQ, Kürti L. Aza-Rubottom Oxidation: Synthetic Access to Primary α-Aminoketones. J Am Chem Soc 2019; 141:2242-2246. [PMID: 30696241 DOI: 10.1021/jacs.8b13818] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
An aza analogue of the Rubottom oxidation is reported. This facile transformation takes place at ambient temperature and directly converts silyl enol ethers to the corresponding primary α-aminoketones. The use of hexafluoroisopropanol (HFIP) as the solvent is essential for the success of this reaction. Overall this process is well-suited for the aza-functionalization and derivatization of complex organic molecules.
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Affiliation(s)
- Zhe Zhou
- Department of Chemistry , Rice University BioScience Research Collaborative , 6500 Main Street , Houston , Texas 77030 , United States
| | - Qing-Qing Cheng
- Department of Chemistry , Rice University BioScience Research Collaborative , 6500 Main Street , Houston , Texas 77030 , United States
| | - László Kürti
- Department of Chemistry , Rice University BioScience Research Collaborative , 6500 Main Street , Houston , Texas 77030 , United States
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15
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Zou LH, Li YC, Li PG, Zhou J, Wu Z. Solvent-Controlled α-Monobromination, α,α-Dibromination or Imidation of 1,3-Diketones with N
-Bromosuccinimide. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800994] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Liang-Hua Zou
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology; Ministry of Education; School of Biotechnology; School of Pharmaceutical Sciences; Jiangnan University; Lihu Avenue 1800 214122 Wuxi P.R. China
| | - Yan-Chun Li
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology; Ministry of Education; School of Biotechnology; School of Pharmaceutical Sciences; Jiangnan University; Lihu Avenue 1800 214122 Wuxi P.R. China
| | - Ping-Gui Li
- State Key Laboratory of Coordination Chemistry; Collaborative Innovation Center of Chemistry for Life Sciences; chool of Chemistry and Chemical Engineering; Nanjing University; Xianlin Avenue 163 210093 Nanjing P. R. China
| | - Jing Zhou
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology; Ministry of Education; School of Biotechnology; School of Pharmaceutical Sciences; Jiangnan University; Lihu Avenue 1800 214122 Wuxi P.R. China
| | - Zhimeng Wu
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology; Ministry of Education; School of Biotechnology; School of Pharmaceutical Sciences; Jiangnan University; Lihu Avenue 1800 214122 Wuxi P.R. China
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16
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Asano T, Moritani M, Nakajima M, Kotani S. Chiral lithium binaphtholate for enantioselective amination of acyclic α-alkyl-β-keto esters: Application to the total synthesis of l -carbidopa. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.08.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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17
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Mallik S, Bhajammanavar V, Ramakrishna I, Baidya M. Cross-Aldol Reaction of Activated Carbonyls with Nitrosocarbonyl Intermediates: Stereoselective Synthesis toward α-Hydroxy-β-amino Esters and Amides. Org Lett 2017; 19:3843-3846. [PMID: 28700246 DOI: 10.1021/acs.orglett.7b01721] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A practical and flexible strategy toward α-hydroxy-β-amino esters and amides, which are important biological motifs, based on an organocatalytic cross-aldol reaction of in situ-generated nitrosocarbonyl intermediates followed by hydrogenation is presented. The protocol features operational simplicity, high yields, a wide substrate scope, and high regio- and diastereoselectivity profiles. The utility of this method was showcased through the synthesis of bestatin analogues and indole formation.
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Affiliation(s)
- Sumitava Mallik
- Department of Chemistry, Indian Institute of Technology Madras , Chennai 600 036, Tamil Nadu, India
| | - Vinod Bhajammanavar
- Department of Chemistry, Indian Institute of Technology Madras , Chennai 600 036, Tamil Nadu, India
| | - Isai Ramakrishna
- Department of Chemistry, Indian Institute of Technology Madras , Chennai 600 036, Tamil Nadu, India
| | - Mahiuddin Baidya
- Department of Chemistry, Indian Institute of Technology Madras , Chennai 600 036, Tamil Nadu, India
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18
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19
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Reddy MK, Mallik S, Ramakrishna I, Baidya M. Nitrosocarbonyl–Henry and Denitration Cascade: Synthesis of α-Ketoamides and α-Keto Oximes. Org Lett 2017; 19:1694-1697. [DOI: 10.1021/acs.orglett.7b00482] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mallu Kesava Reddy
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, Tamil Nadu, India
| | - Sumitava Mallik
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, Tamil Nadu, India
| | - Isai Ramakrishna
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, Tamil Nadu, India
| | - Mahiuddin Baidya
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, Tamil Nadu, India
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20
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Abstract
The nitrosocarbonyls (R-CONO) are highly reactive species and remarkable intermediates toward different synthetic targets. This review will cover a research area whose impact in current organic synthesis is constantly increasing in the chemical community. This review represents the first and comprehensive picture on the generation and trapping of nitrosocarbonyls and is solidly built on more than 380 papers. Six different classes of key starting materials such as hydroxamic acids, N-hydroxy carbamates, N-hydroxyureas, nitrile oxides, and 1,2,4-oxadiazole-4-oxides were highlighted. The content of the review surveys all the methods to generate the nitrosocarbonyls through different approaches (oxidative, thermal, photochemical, catalytic, aerobic, and the less common ones) in the light of efficiency, yields, and mildness. The most successful trapping agents employed to catch these fleeting intermediates are reviewed, exploiting their superior dienophilic, enophilic, and electrophilic power. The work is completed by paragraphs dedicated to the detection of the intermediates, theoretical studies, and insights about the challenges and future directions for the field.
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Affiliation(s)
- Misal Giuseppe Memeo
- Dipartimento di Chimica, Università degli Studi di Pavia , Viale Taramelli 12, 27100 Pavia, Italy
| | - Paolo Quadrelli
- Dipartimento di Chimica, Università degli Studi di Pavia , Viale Taramelli 12, 27100 Pavia, Italy
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21
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Ramakrishna I, Bhajammanavar V, Mallik S, Baidya M. Advanced Nitroso Aldol Reaction: Metal-Free Cross-Coupling of Anilines with Silyl Enol Ethers en Route to α-Amino Ketones. Org Lett 2017; 19:516-519. [DOI: 10.1021/acs.orglett.6b03686] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Isai Ramakrishna
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, Tamil Nadu, India
| | - Vinod Bhajammanavar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, Tamil Nadu, India
| | - Sumitava Mallik
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, Tamil Nadu, India
| | - Mahiuddin Baidya
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, Tamil Nadu, India
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22
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Tran TV, Le HTN, Ha HQ, Duong XNT, Nguyen LHT, Doan TLH, Nguyen HL, Truong T. A five coordination Cu(ii) cluster-based MOF and its application in the synthesis of pharmaceuticals via sp3 C–H/N–H oxidative coupling. Catal Sci Technol 2017. [DOI: 10.1039/c7cy00882a] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Five coordination sites of Cu(ii) cluster were found in VNU-18 that showed highly efficient catalytic property for the oxidative C–H activation via N–H bonds.
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Affiliation(s)
- Thuan V. Tran
- Faculty of Chemical Engineering
- Bach Khoa University
- VNU-HCM
- Ho Chi Minh City
- Vietnam
| | | | - Hiep Q. Ha
- Faculty of Chemical Engineering
- Bach Khoa University
- VNU-HCM
- Ho Chi Minh City
- Vietnam
| | - Xuan N. T. Duong
- Faculty of Chemical Engineering
- Bach Khoa University
- VNU-HCM
- Ho Chi Minh City
- Vietnam
| | - Linh H.-T. Nguyen
- Center for Innovative Materials and Architectures (INOMAR)
- VNU-HCM
- Ho Chi Minh City
- Vietnam
| | - Tan L. H. Doan
- Center for Innovative Materials and Architectures (INOMAR)
- VNU-HCM
- Ho Chi Minh City
- Vietnam
- Faculty of Chemistry
| | - Ha L. Nguyen
- Center for Innovative Materials and Architectures (INOMAR)
- VNU-HCM
- Ho Chi Minh City
- Vietnam
| | - Thanh Truong
- Faculty of Chemical Engineering
- Bach Khoa University
- VNU-HCM
- Ho Chi Minh City
- Vietnam
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23
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Cui Z, Du DM. Enantioselective Synthesis of β-Hydrazino Alcohols Using Alcohols and N-Boc-Hydrazine as Substrates. Org Lett 2016; 18:5616-5619. [PMID: 27786480 DOI: 10.1021/acs.orglett.6b02841] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An enantioselective approach for the synthesis of α-hydrazino aldehydes is described that utilizes alcohols and N-Boc hydrazine instead of the conventional combination of aldehydes with azodicarboxylates. This protocol is enabled by merging in situ aerobic dual oxidation with asymmetric organocatalysis. This reaction also exhibits a high tolerance for varieties of substituents on the alcohol component. This approach features excellent enantiocontrol, cheap starting materials, operational simplicity, and scalability. The corresponding chiral β-hydrazino alcohols were obtained by sequential reduction with excellent enantioselectivity (up to 98% ee).
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Affiliation(s)
- Zhihao Cui
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology , Beijing 100081, People's Republic of China
| | - Da-Ming Du
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology , Beijing 100081, People's Republic of China
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24
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25
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Nourian S, Zilber ZA, Toscano JP. Development of N-Substituted Hydroxamic Acids with Pyrazolone Leaving Groups as Nitrosocarbonyl Precursors. J Org Chem 2016; 81:9138-9146. [PMID: 27617912 DOI: 10.1021/acs.joc.6b01705] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel class of nitrosocarbonyl precursors, N-substituted hydroxamic acids with pyrazolone leaving groups (NHPY), has been synthesized. Under physiological conditions, these compounds generate nitrosocarbonyl intermediates, which upon hydrolysis release nitroxyl (azanone, HNO) in excellent yields. The amount and rate of nitrosocarbonyl generation are dependent on the nature of the pyrazolone leaving groups and significantly on the structural properties of the NHPY donors. Pyrazolones have been found to be efficient nitrosocarbonyl traps, undergoing an N-selective nitrosocarbonyl aldol reaction. This trapping reaction has been used to confirm the involvement of nitrosocarbonyl intermediates in NHPY aqueous decomposition. In addition, NHPY compounds are shown to generate nitrosocarbonyls efficiently under mild basic conditions in organic solvent and may therefore also enjoy synthetic utility.
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Affiliation(s)
- Saghar Nourian
- Department of Chemistry, Johns Hopkins University , 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Zachary A Zilber
- Department of Chemistry, Johns Hopkins University , 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - John P Toscano
- Department of Chemistry, Johns Hopkins University , 3400 North Charles Street, Baltimore, Maryland 21218, United States
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26
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27
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Tanimoto H, Shitaoka T, Yokoyama K, Morimoto T, Nishiyama Y, Kakiuchi K. Formal [3+2] Cycloaddition of Nitrosoallenes with Carbonyl and Nitrile Compounds to Form Functional Cyclic Nitrones. J Org Chem 2016; 81:8722-8735. [DOI: 10.1021/acs.joc.6b00758] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Hiroki Tanimoto
- Graduate School of Materials
Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayamacho, Ikoma, Nara 630-0192, Japan
| | - Takashi Shitaoka
- Graduate School of Materials
Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayamacho, Ikoma, Nara 630-0192, Japan
| | - Keiichi Yokoyama
- Graduate School of Materials
Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayamacho, Ikoma, Nara 630-0192, Japan
| | - Tsumoru Morimoto
- Graduate School of Materials
Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayamacho, Ikoma, Nara 630-0192, Japan
| | - Yasuhiro Nishiyama
- Graduate School of Materials
Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayamacho, Ikoma, Nara 630-0192, Japan
| | - Kiyomi Kakiuchi
- Graduate School of Materials
Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayamacho, Ikoma, Nara 630-0192, Japan
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28
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St. Amant AH, Frazier CP, Newmeyer B, Fruehauf KR, Read de Alaniz J. Direct synthesis of anilines and nitrosobenzenes from phenols. Org Biomol Chem 2016; 14:5520-4. [DOI: 10.1039/c6ob00073h] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A one-pot synthesis of anilines and nitrosobenzenes from phenols has been developed using an ipso-oxidative aromatic substitution (iSOAr) process.
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Affiliation(s)
- A. H. St. Amant
- Department of Chemistry and Biochemistry
- University of California
- Santa Barbara
- USA
| | - C. P. Frazier
- Department of Chemistry and Biochemistry
- University of California
- Santa Barbara
- USA
| | - B. Newmeyer
- Department of Chemistry and Biochemistry
- University of California
- Santa Barbara
- USA
| | - K. R. Fruehauf
- Department of Chemistry and Biochemistry
- University of California
- Santa Barbara
- USA
| | - J. Read de Alaniz
- Department of Chemistry and Biochemistry
- University of California
- Santa Barbara
- USA
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29
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Xiao X, Lin L, Lian X, Liu X, Feng X. Catalytic asymmetric α-amination of β-keto esters and β-keto amides with a chiral N,N′-dioxide–copper(i) complex. Org Chem Front 2016. [DOI: 10.1039/c6qo00095a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The highly efficient asymmetric α-amination of β-keto esters and β-keto amides was realized by using a chiral N,N′-dioxide/Cu(i) complex. Under mild reaction conditions, a series of chiral α-amino dicarbonyl compounds were obtained in good result.
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Affiliation(s)
- Xiao Xiao
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Xiangjin Lian
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
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30
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Ramakrishna I, Sahoo H, Baidya M. Brønsted acid mediated N–O bond cleavage for α-amination of ketones through the aromatic nitroso aldol reaction. Chem Commun (Camb) 2016; 52:3215-8. [PMID: 26810365 DOI: 10.1039/c5cc10102f] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Brønsted acid mediated N–O bond cleavage for α-amination of ketones has been developed through the nitroso aldol reaction of less-reactive aromatic nitroso compounds and silyl enol ethers having a disilane (–SiMe2TMS) backbone.
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Affiliation(s)
- Isai Ramakrishna
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai 600 036
- India
| | - Harekrishna Sahoo
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai 600 036
- India
| | - Mahiuddin Baidya
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai 600 036
- India
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31
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Ramakrishna I, Grandhi GS, Sahoo H, Baidya M. The Mukaiyama aldol reaction of in situ generated nitrosocarbonyl compounds: selective C-N bond formation and N-O bond cleavage in one-pot for α-amination of ketones. Chem Commun (Camb) 2015; 51:13976-9. [PMID: 26245149 DOI: 10.1039/c5cc05459a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A practical protocol for the α-amination of ketones (up to 99% yield) has been developed via the Mukaiyama aldol reaction of in situ generated nitrosocarbonyl compounds. The reaction with silyl enol ethers having a disilane (-SiMe2TMS) backbone proceeded not only with perfect N-selectivity but concomitant N-O bond cleavage was also accomplished. Such a cascade of C-N bond formation and N-O bond cleavage in a single step was heretofore unknown in the field of nitrosocarbonyl chemistry. A very high diastereoselectivity (dr = 19 : 1) was accomplished using (-)-menthol derived chiral nitrosocarbonyl compounds.
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Affiliation(s)
- Isai Ramakrishna
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, Tamil Nadu, India.
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32
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Chaiyaveij D, Batsanov AS, Fox MA, Marder TB, Whiting A. An Experimental and Computational Approach to Understanding the Reactions of Acyl Nitroso Compounds in [4 + 2] Cycloadditions. J Org Chem 2015; 80:9518-34. [DOI: 10.1021/acs.joc.5b01470] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Duangduan Chaiyaveij
- Chemistry
Department, Faculty of Science and Technology, Thammasat University Rangsit Campus, Khlongluang, Pathumthani 12120, Thailand
| | - Andrei S. Batsanov
- Centre
for Sustainable Chemical Processes, Department of Chemistry, Durham University, Science Laboratories, South Road, Durham DH1 3LE, United Kingdom
| | - Mark A. Fox
- Centre
for Sustainable Chemical Processes, Department of Chemistry, Durham University, Science Laboratories, South Road, Durham DH1 3LE, United Kingdom
| | - Todd B. Marder
- Institut
für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Andrew Whiting
- Centre
for Sustainable Chemical Processes, Department of Chemistry, Durham University, Science Laboratories, South Road, Durham DH1 3LE, United Kingdom
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33
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Sandoval D, Samoshin AV, Read de Alaniz J. Asymmetric Electrophilic α-Amination of Silyl Enol Ether Derivatives via the Nitrosocarbonyl Hetero-ene Reaction. Org Lett 2015; 17:4514-7. [PMID: 26317504 DOI: 10.1021/acs.orglett.5b02208] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- David Sandoval
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Andrey V. Samoshin
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Javier Read de Alaniz
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, United States
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34
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Xu C, Zhang L, Luo S. Catalytic Asymmetric Oxidative α-C–H N,O-Ketalization of Ketones by Chiral Primary Amine. Org Lett 2015; 17:4392-5. [DOI: 10.1021/acs.orglett.5b02322] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Changming Xu
- Beijing
National Laboratory for Molecular Sciences (BNLMS), Key Laboratory
of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Long Zhang
- Beijing
National Laboratory for Molecular Sciences (BNLMS), Key Laboratory
of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- Collaborative
Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300071, China
| | - Sanzhong Luo
- Beijing
National Laboratory for Molecular Sciences (BNLMS), Key Laboratory
of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- Collaborative
Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300071, China
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35
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Xie X, Zhang L, He Q, Hou J, Xu C, Zhang N, Luo S, Nie Z. Copper-Catalyzed Aerobic Autoxidation ofN-Hydroxycarbamates Probed by Mass Spectrometry. Chemistry 2015; 21:14630-7. [DOI: 10.1002/chem.201501750] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Indexed: 11/10/2022]
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36
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Maji B, Yamamoto H. Use of In Situ Generated Nitrosocarbonyl Compounds in Catalytic Asymmetric α-Hydroxylation and α-Amination Reactions. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2015. [DOI: 10.1246/bcsj.20150040] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Biplab Maji
- Molecular Catalyst Research Center, Chubu University
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37
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Accessing nitrosocarbonyl compounds with temporal and spatial control via the photoredox oxidation of N-substituted hydroxylamines. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.01.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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38
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Zhang L, Fu N, Luo S. Pushing the limits of aminocatalysis: enantioselective transformations of α-branched β-ketocarbonyls and vinyl ketones by chiral primary amines. Acc Chem Res 2015; 48:986-97. [PMID: 25831453 DOI: 10.1021/acs.accounts.5b00028] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Enantioselective α-functionalizations of carbonyl compounds are fundamental transformations for the asymmetric synthesis of organic compounds. One of the more recent developments along this line is in aminocatalysis, which leads to the direct α-functionalization of simple aldehydes and ketones. However, most of the advances have been achieved with linear aldehydes and ketones as substrates. Effective aminocatalysis with α-branched carbonyls, particularly α-branched ketones, has remained elusive. The primary difficulty arises from the space-demanding α-substituent, which impedes iminium/enamine formation. In 2005, synthetic organic chemists revived catalysis using primary amines, which brought new attention to these challenges, because of the conformational flexibility of primary amines. On the basis of early biomimetic studies by Hine, in 2007 we developed the bioinspired chiral primary amine catalysts featuring primary-tertiary diamines. This type of catalyst involves enamine/iminium catalysis, and we could apply this chemistry to all of the major types of ketones and aldehydes. In this Account, we present research from our laboratory that significantly expands aminocatalysis to include α-branched ketones such as β-ketocarbonyls and α-substituted vinyl ketones. Our primary amine catalysis methodology, when used alone or in conjunction with metal catalysts, provides convenient access to both enantiopure α-tertiary and quaternary ketones, structures that are not available via other approaches. Our mechanistic studies showed that acidic additives play the critical role in facilitating catalytic turnover, most likely by shuttling protons during the enamine/iminium tautomerizations. These additives are also critical to induce the desired stereochemistry via ammonium N-H hydrogen bonding. Proton transfer by shuttling is also stereoselective, resulting in enantioselective enamine protonation as observed in the reactions of α-substituted vinyl ketones. In addition, we have carried out density functional theory studies that help to delineate the origins of the stereoselectivity in these reactions.
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Affiliation(s)
- Long Zhang
- Beijing National Laboratory
for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition
and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
| | - Niankai Fu
- Beijing National Laboratory
for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition
and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
| | - Sanzhong Luo
- Beijing National Laboratory
for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition
and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
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39
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Murru S, Lott CS, Fronczek FR, Srivastava RS. Fe-Catalyzed Direct α C–H Amination of Carbonyl Compounds. Org Lett 2015; 17:2122-5. [DOI: 10.1021/acs.orglett.5b00710] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Siva Murru
- Department
of Chemistry, University of Louisiana at Lafayette, Lafayette, Louisiana 70504, United States
| | - Charles Seth Lott
- Department
of Chemistry, University of Louisiana at Lafayette, Lafayette, Louisiana 70504, United States
| | - Frank R. Fronczek
- Department
of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Radhey S. Srivastava
- Department
of Chemistry, University of Louisiana at Lafayette, Lafayette, Louisiana 70504, United States
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40
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Guthrie DA, Nourian S, Takahashi CG, Toscano JP. Curtailing the hydroxylaminobarbituric acid-hydantoin rearrangement to favor HNO generation. J Org Chem 2015; 80:1349-56. [PMID: 25585151 DOI: 10.1021/jo5023316] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Due to its inherent reactivity, HNO must be generated in situ through the use of donor compounds. One of the primary strategies for the development of new HNO donors has been modifying hydroxylamines with good leaving groups. A recent example of this strategy is the (hydroxylamino)barbituric acid (HABA) class of HNO donors. In this case, however, an undesired intramolecular rearrangement pathway to the corresponding hydantoin derivative competes with HNO formation, particularly in the absence of chemical traps for HNO. This competitive non-HNO-producing pathway has restricted the development of the HABA class to examples with fast HNO release profiles at physiological pH and temperature (t(1/2) < 1 min). Herein, the factors that favor the rearrangement pathway have been examined and two independent strategies that protect against rearrangement to favor HNO generation have been developed. The timecourse and stoichiometry for the in vitro conversion of these compounds to HNO (trapped as a phosphine aza-ylide) and the corresponding barbituric acid (BA) byproduct have been determined by (1)H NMR spectroscopy under physiologically relevant conditions. These results confirm the successful extension of the HABA class of pure HNO donors with half-lives at pH 7.4, 37 °C ranging from 19 to 107 min.
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Affiliation(s)
- Daryl A Guthrie
- Department of Chemistry, 3400 North Charles Street, Johns Hopkins University , Baltimore, Maryland 21218, United States
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41
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Guthrie DA, Ho A, Takahashi CG, Collins A, Morris M, Toscano JP. “Catch-and-Release” of HNO with Pyrazolones. J Org Chem 2015; 80:1338-48. [DOI: 10.1021/jo502330w] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Daryl A. Guthrie
- Department
of Chemistry, 3400 North
Charles Street, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Anthony Ho
- Department
of Chemistry, 3400 North
Charles Street, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Cyrus G. Takahashi
- Department
of Chemistry, 3400 North
Charles Street, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Anthony Collins
- Department
of Chemistry, 3400 North
Charles Street, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Matthew Morris
- Department
of Chemistry, 3400 North
Charles Street, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - John P. Toscano
- Department
of Chemistry, 3400 North
Charles Street, Johns Hopkins University, Baltimore, Maryland 21218, United States
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42
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Maji B, Yamamoto H. Copper-Catalyzed Asymmetric Synthesis of Tertiary α-Hydroxy Phosphonic Acid Derivatives with In Situ Generated Nitrosocarbonyl Compounds as the Oxygen Source. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408893] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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43
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Copper-Catalyzed Asymmetric Synthesis of Tertiary α-Hydroxy Phosphonic Acid Derivatives with In Situ Generated Nitrosocarbonyl Compounds as the Oxygen Source. Angew Chem Int Ed Engl 2014; 53:14472-5. [DOI: 10.1002/anie.201408893] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Indexed: 11/07/2022]
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44
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Zhang L, Xu C, Mi X, Luo S. Origins of the enantio- and N/O selectivity in the primary-amine-catalyzed hydroxyamination of 1,3-dicarbonyl compounds with in-situ-formed nitrosocarbonyl compounds: a theoretical study. Chem Asian J 2014; 9:3565-71. [PMID: 25224967 DOI: 10.1002/asia.201402720] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Indexed: 11/08/2022]
Abstract
Chemoselective control over N/O selectivity is an intriguing issue in nitroso chemistry. Recently, we reported an unprecedented asymmetric α-amination reaction of β-ketocarbonyl compounds that proceeded through the catalytic coupling of enamine carbonyl groups with in-situ-generated carbonyl nitroso moieties. This process was facilitated by a simple chiral primary and tertiary diamine that was derived from tert-leucine. This reaction featured high chemoselectivity and excellent enantioselectivity for a broad range of substrates. Herein, a computational study was performed to elucidate the origins of the enantioselectivity and N/O regioselectivity. We found that a bidentate hydrogen-bonding interaction between the tertiary N(+)-H and nitrosocarbonyl groups accounted for the high N selectivity, whilst the enantioselectivity was determined by Si-facial attack on the (E)- and (Z)-enamines in a Curtin-Hammett-type manner. The bidentate hydrogen-bonding interaction with the nitrosocarbonyl moieties reinforced the facial selectivity in this process.
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Affiliation(s)
- Long Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory for Molecular Recognition and Function, Institute of Chemistry the Chinese Academy of Sciences, Beijing, 100190 (China); Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300071 (China), Fax: 86-10-62554449
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45
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Samoshin AV, Hawker CJ, Read de Alaniz J. Nitrosocarbonyl Hetero-Diels-Alder Cycloaddition: A New Tool for Conjugation. ACS Macro Lett 2014; 3:753-757. [PMID: 35590694 DOI: 10.1021/mz500348y] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
It is demonstrated that nitrosocarbonyl hetero-Diels-Alder chemistry is an efficient and versatile reaction that can be applied in macromolecular synthesis. Polyethylene glycol functionalized with a hydroxamic acid moiety undergoes facile coupling with cyclopentadiene-terminated polystyrene, through a copper-catalyzed as well as thermal hetero-Diels-Alder reaction. The mild and orthogonal methods used to carry out this reaction make it an attractive method for the synthesis of block copolymers. The resulting block copolymers were analyzed and characterized using GPC and NMR. The product materials could be subjected to thermal retro [4 + 2] cycloaddition, allowing for the liberation of the individual polymer chains and subsequent recycling of the diene-terminated polymers.
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Affiliation(s)
- Andrey V. Samoshin
- Department of Chemistry and Biochemistry and ‡Materials Department,
Materials Research
Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Craig J. Hawker
- Department of Chemistry and Biochemistry and ‡Materials Department,
Materials Research
Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Javier Read de Alaniz
- Department of Chemistry and Biochemistry and ‡Materials Department,
Materials Research
Laboratory, University of California, Santa Barbara, California 93106, United States
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Tan H, Li M, Liang F. Direct α-C-H amination of β-dicarbonyl compounds using DBU-activated N-haloimides as nitrogen sources. RSC Adv 2014. [DOI: 10.1039/c4ra07118b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
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47
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Yu C, Song A, Zhang F, Wang W. Catalytic Asymmetric α-Hydroxyamination of Carbonyls withN-Hydroxycarbamates Becomes Greener. ChemCatChem 2014. [DOI: 10.1002/cctc.201402121] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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48
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Xu C, Zhang L, Luo S. Merging Aerobic Oxidation and Enamine Catalysis in the Asymmetric α-Amination of β-Ketocarbonyls UsingN-Hydroxycarbamates as Nitrogen Sources. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201400776] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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49
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Merging Aerobic Oxidation and Enamine Catalysis in the Asymmetric α-Amination of β-Ketocarbonyls UsingN-Hydroxycarbamates as Nitrogen Sources. Angew Chem Int Ed Engl 2014; 53:4149-53. [DOI: 10.1002/anie.201400776] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Indexed: 11/07/2022]
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50
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Yang W, Huang L, Yu Y, Pflästerer D, Rominger F, Hashmi ASK. Highly diastereoselective and regioselective copper-catalyzed nitrosoformate dearomatization reaction under aerobic-oxidation conditions. Chemistry 2014; 20:3927-31. [PMID: 24590772 DOI: 10.1002/chem.201400321] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2014] [Indexed: 11/10/2022]
Abstract
An unprecedented copper-catalyzed acylnitroso dearomatization reaction, which expands the traditional acylnitroso ene reaction and acylnitroso Diels-Alder reaction to a new type of transformation, has been developed under aerobic oxidation. Intermolecular and intra-/intermolecular reaction modes demonstrate an entirely different N- or O-acylnitroso selectivity. Hence, we can utilize this reaction as a highly diastereoselective access to a series of new pyrroloindoline derivatives, which are important structural motifs for natural-product synthesis.
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Affiliation(s)
- Weibo Yang
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany), Fax: (+49) 6221-54-4205
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