1
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Tang Y, Grange RL, Engl OD, Miller SJ. Chemoselective Acylation of Nucleosides. Chemistry 2022; 28:e202201661. [PMID: 35730928 PMCID: PMC9481663 DOI: 10.1002/chem.202201661] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Yu Tang
- Department of Chemistry Yale University New Haven CT 06520 USA
| | - Rebecca L. Grange
- Process Chemistry & Development Takeda Pharmaceuticals International Co. Cambridge MA 02139 USA
| | - Oliver D. Engl
- Process Chemistry & Development Takeda Pharmaceuticals International Co. Cambridge MA 02139 USA
| | - Scott J. Miller
- Department of Chemistry Yale University New Haven CT 06520 USA
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2
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Reber KP, Sivey JD, Vollmuth M, Gujarati PD. Synthesis of
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C‐Labeled Parabens from Isotopically Enriched Phenols Using the Houben–Hoesch Reaction. J Labelled Comp Radiopharm 2022; 65:254-263. [DOI: 10.1002/jlcr.3992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 07/18/2022] [Indexed: 11/09/2022]
Affiliation(s)
| | - John D. Sivey
- Department of Chemistry Towson University Towson MD USA
| | | | - Priyansh D. Gujarati
- Department of Chemistry Towson University Towson MD USA
- Department of Chemistry University of Oxford Oxford UK
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3
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Nelson H, Richard W, Brown H, Medlin A, Light C, Heller ST. Practical Chemoselective Acylation: Organocatalytic Chemodivergent Esterification and Amidation of Amino Alcohols with
N
‐Carbonylimidazoles. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202107438] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Hope Nelson
- Department of Chemistry and Biochemistry Loyola Marymount University 1 LMU Drive Los Angeles CA 90045 USA
| | - William Richard
- Department of Chemistry and Biochemistry Loyola Marymount University 1 LMU Drive Los Angeles CA 90045 USA
| | - Hailee Brown
- Department of Chemistry and Biochemistry Loyola Marymount University 1 LMU Drive Los Angeles CA 90045 USA
| | - Abigail Medlin
- Department of Chemistry and Biochemistry Loyola Marymount University 1 LMU Drive Los Angeles CA 90045 USA
| | - Christina Light
- Department of Chemistry and Biochemistry Loyola Marymount University 1 LMU Drive Los Angeles CA 90045 USA
| | - Stephen T. Heller
- Department of Chemistry and Biochemistry Loyola Marymount University 1 LMU Drive Los Angeles CA 90045 USA
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4
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Nelson H, Richard W, Brown H, Medlin A, Light C, Heller S. Practical Chemoselective Acylation: Organocatalytic Chemodivergent Esterification and Amidation of Amino Alcohols with N-Carbonylimidazoles. Angew Chem Int Ed Engl 2021; 60:22818-22825. [PMID: 34387009 DOI: 10.1002/anie.202107438] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Indexed: 11/05/2022]
Abstract
Chemoselective transformations are a cornerstone of efficient organic synthesis; however, achieving this goal for even simple transformations like acylations is often a challenge. We report that N -carbonylimidazoles undergo catalytic chemodivergent acylations of anilines or alcohols in the presence of pyridinium ions or DBU (1,8-Diazabicyclo[5.4.0]undec-7-ene), respectively. Both of these acylations display simultaneously high and broad chemoselectivity for the target group. Unprecedented levels of chemoselectivity were achieved in the DBU-catalyzed esterification: a single esterification product was obtained from a molecule containing primary aniline, alcohol, phenol, secondary amide, and N- H indole groups. These acylations are highly practical as they involve only readily available, inexpensive, and relatively safe reagents; can be performed at the multigram scale; and can be used on carboxylic acids directly via in situ formation of the acylimidazole electrophile. Reaction discovery, scope, assessment of practicality, and preliminary mechanistic investigations are discussed.
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Affiliation(s)
- Hope Nelson
- Willamette University, Chemistry, UNITED STATES
| | - William Richard
- Loyola Marymount University, Chemistry and Biochemistry, UNITED STATES
| | - Hailee Brown
- The University of Arizona, Chemistry, UNITED STATES
| | - Abigail Medlin
- Loyola Marymount University, Chemistry and Biochemistry, UNITED STATES
| | - Christina Light
- Loyola Marymount University, Chemistry and Biochemistry, UNITED STATES
| | - Stephen Heller
- Loyola Marymount University, Chemistry and Biochemistry, Department of Chemistry 1 LMU Drive, 90045, Los Angeles, UNITED STATES
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5
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Liu Y, Xiong J, Wei L, Wan J. Switchable Synthesis of α,α‐Dihalomethyl and α,α,α‐Trihalomethyl Ketones by Metal‐Free Decomposition of Enaminone C=C Double Bond. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901234] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yunyun Liu
- College of Chemistry and Chemical EngineeringJiangxi Normal University Nanchang 330022 People's Republic of China
| | - Jin Xiong
- College of Chemistry and Chemical EngineeringJiangxi Normal University Nanchang 330022 People's Republic of China
| | - Li Wei
- College of Chemistry and Chemical EngineeringJiangxi Normal University Nanchang 330022 People's Republic of China
| | - Jie‐Ping Wan
- College of Chemistry and Chemical EngineeringJiangxi Normal University Nanchang 330022 People's Republic of China
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6
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Sadanandan S, Gupta DK. Changing stereoselectivity and regioselectivity in copper( i)-catalyzed 5- exo cyclization by chelation and rigidity in aminoalkyl radicals: synthesis towards diverse bioactive N-heterocycles. NEW J CHEM 2020. [DOI: 10.1039/c9nj05166j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Chelation, rigidity and carbon-radical positions in aminoalkyl precursors disturb the usual 2,4-trans diastereoselectivity and 5-exo mode in Cu(i)-catalyzed ATRC.
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7
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Continuous flow reaction system for the synthesis of 2,2,2-trichloroacetophenone derivatives and its application. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.01.067] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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Jayaraman A, Cho E, Irudayanathan FM, Kim J, Lee S. Metal-Free Decarboxylative Trichlorination of Alkynyl Carboxylic Acids: Synthesis of Trichloromethyl Ketones. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201701116] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Aravindan Jayaraman
- Department of Chemistry; Chonnam National University; Gwangju 61186 Republic of Korea
| | - Eunjeong Cho
- Department of Chemistry; Chonnam National University; Gwangju 61186 Republic of Korea
| | | | - Jimin Kim
- Department of Chemistry; Chonnam National University; Gwangju 61186 Republic of Korea
| | - Sunwoo Lee
- Department of Chemistry; Chonnam National University; Gwangju 61186 Republic of Korea
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9
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Marichev KO, Garcia EC, Bhowmick KC, Wherritt DJ, Arman H, Doyle MP. Highly selective acylation of polyamines and aminoglycosides by 5-acyl-5-phenyl-1,5-dihydro-4 H-pyrazol-4-ones. Chem Sci 2017; 8:7152-7159. [PMID: 29081946 PMCID: PMC5635523 DOI: 10.1039/c7sc03184j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 08/29/2017] [Indexed: 12/03/2022] Open
Abstract
5-Acyl-5-phenyl-1,5-dihydro-4H-pyrazol-4-ones, accessible from arylpropargyl phenyldiazoacetates, are highly selective acyl transfer reagents for di- and polyamines, as well as aminoalcohols and aminothiols. As reagents with a carbon-based leaving group, they have been applied for benzoyl transfer with a broad selection of substrates containing aliphatic amino in combination with other competing nucleophilic functional groups. The substrate scope and levels of selectivity for direct benzoyl transfer exceed those of known benzoylating reagents. With exceptional selectivity for acylation between primary amines bound to primary and secondary carbons, these new reagents have been used in direct site-selective monobenzoylation of aminoglycoside antibiotics.
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Affiliation(s)
- Kostiantyn O Marichev
- Department of Chemistry , The University of Texas at San Antonio , San Antonio , Texas 78249 , USA .
| | - Estevan C Garcia
- Department of Chemistry , The University of Texas at San Antonio , San Antonio , Texas 78249 , USA .
| | - Kartick C Bhowmick
- Department of Chemistry , The University of Texas at San Antonio , San Antonio , Texas 78249 , USA .
| | - Daniel J Wherritt
- Department of Chemistry , The University of Texas at San Antonio , San Antonio , Texas 78249 , USA .
| | - Hadi Arman
- Department of Chemistry , The University of Texas at San Antonio , San Antonio , Texas 78249 , USA .
| | - Michael P Doyle
- Department of Chemistry , The University of Texas at San Antonio , San Antonio , Texas 78249 , USA .
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10
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Sriramoju V, Jillella R, Kurva S, Madabhushi S. A Study on Reactions of an Alkynylsilane with Oxone-KX (X = Cl, Br, I) and Its One-pot Transformation into an Amide/Ester. CHEM LETT 2017. [DOI: 10.1246/cl.161171] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Vinodkumar Sriramoju
- Fluoroorganics Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Raveendra Jillella
- Fluoroorganics Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Srinivas Kurva
- Fluoroorganics Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Sridhar Madabhushi
- Fluoroorganics Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
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11
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Brenna E, Crotti M, Gatti FG, Marinoni L, Monti D, Quaiato S. Exploitation of a Multienzymatic Stereoselective Cascade Process in the Synthesis of 2-Methyl-3-Substituted Tetrahydrofuran Precursors. J Org Chem 2017; 82:2114-2122. [PMID: 28094943 DOI: 10.1021/acs.joc.6b02927] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Enantiopure 2-methyl-3-substituted tetrahydrofurans are key precursors of several biologically active products (drugs, flavors, and agrochemicals). Thus, a stereocontrolled and efficient methodology for the obtainment of these synthons is highly desirable. We exploited a two-step multienzymatic stereoselective cascade reduction of α-bromo-α,β-unsaturated ketones to give the corresponding bromohydrins in good yields, with high ee and de values. The cascade process is catalyzed by an ene-reductase and an alcohol dehydrogenase. Further manipulations of these bromohydrins, by two diastereodivergent routes, allowed the preparation of the tetrahydrofuran synthons. One route is based on a lipase catalyzed cleavage of the protecting group. The second route is characterized by a camphor sulfonic acid mediated isomerization of a β-hydroxyepoxide to give the tetrahydrofuran-2-ol. Finally, the synthesis of the most odorous and pleasant stereoisomer of the roasted meat aroma, i.e., (2S,3R)-2-methyl-3-thioacetate tetrahydrofuran, is reported as well.
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Affiliation(s)
- Elisabetta Brenna
- Dipartimento di Chimica, Materiali ed Ingegneria Chimica "G. Natta", Politecnico di Milano , P.zza Leonardo da Vinci 32, 20133 Milano, Italy.,The Protein Factory, Politecnico di Milano and Università degli Studi dell'Insubria , Via Mancinelli 7, 20131 Milano, Italy
| | - Michele Crotti
- Dipartimento di Chimica, Materiali ed Ingegneria Chimica "G. Natta", Politecnico di Milano , P.zza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Francesco G Gatti
- Dipartimento di Chimica, Materiali ed Ingegneria Chimica "G. Natta", Politecnico di Milano , P.zza Leonardo da Vinci 32, 20133 Milano, Italy.,The Protein Factory, Politecnico di Milano and Università degli Studi dell'Insubria , Via Mancinelli 7, 20131 Milano, Italy
| | - Ludovico Marinoni
- Dipartimento di Chimica, Materiali ed Ingegneria Chimica "G. Natta", Politecnico di Milano , P.zza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Daniela Monti
- Istituto di Chimica del Riconoscimento Molecolare C.N.R. , Via Mario Bianco, 9, 20131, Milano, Italy
| | - Sara Quaiato
- Dipartimento di Chimica, Materiali ed Ingegneria Chimica "G. Natta", Politecnico di Milano , P.zza Leonardo da Vinci 32, 20133 Milano, Italy
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12
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Ram RN, Kumar N, Gupta DK. Substrate-Controlled Diastereoselective Synthesis of Sugar-Based Chlorinated Perhydrofuro[2,3-b]pyransviaCopper(I)-Catalyzed Radical Cyclization. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201600895] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ram N. Ram
- Department of Chemistry; Indian Institute of Technology Delhi; Hauz Khas, New Delhi - 110016 India
| | - Neeraj Kumar
- Department of Chemistry; Indian Institute of Technology Delhi; Hauz Khas, New Delhi - 110016 India
- Micro Labs Ltd., Plot No. 43-45; KIADB; Jigni-Bommasandra Link Road Bangalore - 560105 India
| | - Dharmendra Kumar Gupta
- Department of Chemistry; Indian Institute of Technology Delhi; Hauz Khas, New Delhi - 110016 India
- Micro Labs Ltd., Plot No. 43-45; KIADB; Jigni-Bommasandra Link Road Bangalore - 560105 India
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13
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Ram RN, Gupta DK. Direct and Stereoselective Synthesis of Diversely Substituted 2,4-trans-(NH)-Pyrrolidines by Copper(I)-Catalyzed Radical Cyclization at Low Temperature. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600844] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Ram N. Ram
- Department of Chemistry; Indian Institute of Technology Delhi, Hauz Khas; New Delhi - 110016 India
| | - Dharmendra Kumar Gupta
- Department of Chemistry; Indian Institute of Technology Delhi, Hauz Khas; New Delhi - 110016 India
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14
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Shi YN, Xin Y, Ling Y, Li XC, Hao CY, Zhu HT, Wang D, Yang CR, Xu M, Zhang YJ. Chemical constituents from Piper hainanense and their cytotoxicities. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2016; 18:730-736. [PMID: 26982483 DOI: 10.1080/10286020.2016.1158709] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Accepted: 02/23/2016] [Indexed: 06/05/2023]
Abstract
Two new compounds, (Z,R)-1-phenylethylcinnamate (1) and (1R,2R,3R,6S)-pipoxide (2) were isolated from the aerial part of Piper hainanense, along with 12 known compounds, including nine benzene derivatives (4-11), one isobutylamide (12), and two polyoxygenated cyclohexene derivatives (13-14). Their structures were elucidated on the basis of the HRESIMS, 1D and 2D NMR spectroscopic analyses, and ECD in cases of 2 and 3. The absolute configuration of ellipeiopsol B (3) was determined for the first time. All these compounds 1-14 were reported from the titled plant for the first time. Most of the isolates were tested for their cytotoxicities against five human cancer cell lines. Four of which, 2, 3, 9, 14 showed moderate bioactivities. Among them, the new compound 2 showed potential cytotoxicity against SMMC-7721, MCF-7, and SW-480 with IC50 values of 9.7, 15.0, and 13.2 μM, respectively.
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Affiliation(s)
- Yan-Ni Shi
- a State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , China
- b University of Chinese Academy of Sciences , Beijing , China
| | - Ying Xin
- a State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , China
- b University of Chinese Academy of Sciences , Beijing , China
| | - Yi Ling
- a State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , China
- b University of Chinese Academy of Sciences , Beijing , China
| | - Xing-Cong Li
- c National Center for Natural Products Research, School of Pharmacy , University of Mississippi , Mississippi 38677 , USA
| | - Chao-Yun Hao
- d Chinese Academy of Tropical Agricultural Sciences, Institute of Spice and Beverage Research , Hainan 100049 , China
| | - Hong-Tao Zhu
- a State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , China
| | - Dong Wang
- a State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , China
| | - Chong-Ren Yang
- a State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , China
| | - Min Xu
- a State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , China
| | - Ying-Jun Zhang
- a State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , China
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15
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Liu X, Xu H, Ma Z, Zhang H, Wu C, Liu Z. Cu-catalyzed aerobic oxygenation of 2-phenoxyacetophenones to alkyloxy acetophenones. RSC Adv 2016. [DOI: 10.1039/c5ra25734d] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Cu-catalyzed aerobic oxygenation of 2-phenoxyacetophenones in alcohols was achieved, producing alkyl benzoates, alkyloxy acetophenones and phenols in high yields.
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Affiliation(s)
- Xinwei Liu
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid, Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Huanjun Xu
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid, Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Zhishuang Ma
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid, Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Hongye Zhang
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid, Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Cailing Wu
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid, Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Zhimin Liu
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid, Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
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16
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Morrill LC, Stark DG, Taylor JE, Smith SR, Squires JA, D'Hollander ACA, Simal C, Shapland P, O'Riordan TJC, Smith AD. Organocatalytic Michael addition–lactonisation of carboxylic acids using α,β-unsaturated trichloromethyl ketones as α,β-unsaturated ester equivalents. Org Biomol Chem 2014; 12:9016-27. [DOI: 10.1039/c4ob01788a] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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17
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Ram RN, Soni VK. Synthesis of 3-alkylbenzoxazolones from N-alkyl-N-arylhydroxylamines by contiguous O-trichloroacetylation, trichloroacetoxy ortho-shift, and cyclization sequence. J Org Chem 2013; 78:11935-47. [PMID: 24168289 DOI: 10.1021/jo401985h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Benzoxazolone pharmacophore is present in clinical pharmaceuticals, drug candidates, and many compounds having a wide spectrum of biological activities. The methods available for the synthesis of benzoxazolones have limited diversity due to problems in accessibility and air-sensitivity of diversely substituted o-aminophenols from which they are generally prepared by cyclocarbonylation with phosgene or its equivalents. The present paper describes a mild method for the synthesis of 3-alkylbenzoxazolones from easily accessible and air-stable nitroarenes. Nitroarenes were converted to N-alkyl-N-arylhydroxylamines in two steps involving partial reduction to arylhydroxylamines followed by selective N-alkylation. Treatment of N-alkyl-N-arylhydroxylamines with trichloroacetyl chloride and triethylamine afforded 3-alkylbenzoxazolones generally in good yields through an uninterrupted three-step sequence involving O-trichloroacetylation, N→C(ortho) trichloroacetoxy shift, and cyclization in a single pot at ambient temperatures. The present method is mild, wide in scope, economical, and regioselective. Many sensitive groups like alkyl and aryl esters, amide, cyano, and the carbon-carbon double bond survive the reaction.
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Affiliation(s)
- Ram N Ram
- Department of Chemistry, Indian Institute of Technology , Delhi, Hauz Khas, New Delhi 110016, India
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18
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Dohi S, Moriyama K, Togo H. Transition-Metal-Free Transformation of Aryl Bromides into Aromatic Esters and Amides via Aryl Trichloromethyl Ketones. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301170] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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19
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Ramanjaneyulu BT, Reddy V, Arde P, Mahesh S, Anand RV. Combining oxidative N-heterocyclic carbene catalysis with click chemistry: a facile one-pot approach to 1,2,3-triazole derivatives. Chem Asian J 2013; 8:1489-96. [PMID: 23606655 DOI: 10.1002/asia.201300138] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Revised: 02/27/2013] [Indexed: 11/12/2022]
Abstract
A combination of the oxidative N-heterocyclic carbene catalysis and click chemistry has been explored for the direct, one-pot synthesis of 1,2,3-triazole derivatives from aromatic aldehydes. This procedure was found to be very efficient and a variety of 1,2,3-triazole derivatives could be accessed through their corresponding propargyl esters in moderate-to-good yields under mild conditions.
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Affiliation(s)
- B T Ramanjaneyulu
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S.A.S Nagar, Punjab-140306, India
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