1
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Chen CL, Huang TS, Chang PH, Hsu CS. Iodide-umpolung catalytic system for non-traditional amide coupling from nitroalkanes and amines. Org Biomol Chem 2024; 22:2780-2790. [PMID: 38498332 DOI: 10.1039/d4ob00184b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Abstract
An N-iodosuccinimide (NIS) catalyst was developed for use in the non-traditional synthesis of amide derivatives from nitroalkanes and amines. In contrast to traditional oxidative catalysis, this catalytic system involves reversing the polarities of two catalytic components (umpolung) by means of a hypervalent iodine reagent. A variety of functional groups were tolerated in the reaction, suggesting that they have the potential for use in other types of oxidative catalytic reactions.
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Affiliation(s)
- Chun-Lin Chen
- Department of Chemistry, Fu Jen Catholic University, 510 Zhongzheng Road, Xinzhuang District, New Taipei City 24205, Taiwan.
| | - Tian-Sih Huang
- Department of Chemistry, Fu Jen Catholic University, 510 Zhongzheng Road, Xinzhuang District, New Taipei City 24205, Taiwan.
| | - Po-Hsiang Chang
- Department of Chemistry, Fu Jen Catholic University, 510 Zhongzheng Road, Xinzhuang District, New Taipei City 24205, Taiwan.
| | - Che-Sheng Hsu
- Department of Chemistry, Fu Jen Catholic University, 510 Zhongzheng Road, Xinzhuang District, New Taipei City 24205, Taiwan.
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2
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Ghosh D, Molla SA, Ghosh NN, Khamarui S, Maiti DK. Cu II-Catalyzed cis-Selective Synthesis of Ketoepoxides from Phenacyl Bromides and Water. J Org Chem 2023. [PMID: 37379249 DOI: 10.1021/acs.joc.2c02835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/30/2023]
Abstract
A verity of α,β-ketoepoxides was synthesized using a CuII-catalyzed oxidative C-C/O-C coupled cyclization strategy with high yield and cis-selectivity. Water is used as the source of oxygen and phenacyl bromide as the carbon in the valuable epoxides. The self-coupling method was extended to cross-coupling between phenacyl bromides with benzyl bromides. A high cis-diastereoselectivity was observed in all the synthesized ketoepoxides. Control experiments and density functional theory (DFT) study were performed to understand the CuII-CuI transition mechanism.
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Affiliation(s)
- Debasish Ghosh
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
| | - Sabir A Molla
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
| | | | - Saikat Khamarui
- Department of Chemistry, Government General Degree College, Kalna-1, Burdwan 713405, India
| | - Dilip K Maiti
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
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3
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Zhu Y, Song S, Zheng L, Li J. The O 2-Mediated Cross-Dehydrogenative Coupling: Rose Bengal-Catalyzed Direct Oxidative α-Acyloxylation of Ketones. Org Lett 2023. [PMID: 37377381 DOI: 10.1021/acs.orglett.3c01741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
A general and facile approach for the direct oxidative α-acyloxylation of ketones using molecular oxygen as the oxidant is developed. This method avoids the use of excessive peroxides and expensive metal catalysts, affording a variety of α-acyloxylated ketones in satisfactory yields. Experimental studies indicate that the reaction proceeds via a radical pathway. Additionally, α-hydroxy ketones could be obtained by changing the solvent.
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Affiliation(s)
- Yunsheng Zhu
- Key Laboratory of Pharmaceutical Engineering of Zhejiang Province, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, P. R. China
| | - Shengjie Song
- Key Laboratory of Pharmaceutical Engineering of Zhejiang Province, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, P. R. China
| | - Lijun Zheng
- Key Laboratory of Pharmaceutical Engineering of Zhejiang Province, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, P. R. China
| | - Jianjun Li
- Key Laboratory of Pharmaceutical Engineering of Zhejiang Province, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, P. R. China
- Taizhou Key Laboratory of Advanced Manufacturing Technology, Taizhou Research Institute, Zhejiang University of Technology, Taizhou, Zhejiang 318000, P. R. China
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4
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Gao T, Yang Y, Hu L, Luo D, Zhang X, Xiong Y. Metal -free PhI(OAc) 2-oxidized decarboxylation of propiolic acids towards synthesis of α-acetoxy ketones and insights into general decarboxylation with DFT calculations. Org Biomol Chem 2023; 21:1457-1462. [PMID: 36651659 DOI: 10.1039/d2ob02281h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A metal-free oxidative decarboxylation reaction of propiolic acids mediated by hypervalent iodine(III) reagents is described. This decarboxylative C-O bond-forming reaction used a combination of (diacetoxyiodo)benzene and aromatic, heteroaromatic or aliphatic propiolic acids to give the corresponding α-acetoxy ketones. Preliminary mechanistic studies based on both DFT calculations and high-resolution mass spectroscopy (HRMS) suggested that the reaction proceeded through decarboxylation to form a propargyl iodide intermediate. This reaction provides an attractive alternative to existing methods for the exclusive synthesis of α-acyloxy ketones.
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Affiliation(s)
- Tianyong Gao
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China.
| | - Yawen Yang
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China.
| | - Liangzhen Hu
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China.
| | - Dan Luo
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China.
| | - Xiaohui Zhang
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China.
| | - Yan Xiong
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China. .,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China.,School of Chemical and Environmental Engineering, and Collaborative Innovation Center for High Value Transformation of Coal Chemical Process By-products, Xinjiang Institute of Engineering, Xinjiang 830091, China
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5
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Mondal S, Mondal S, Midya SP, Das S, Mondal S, Ghosh P. Merging Photocatalytic C-O Cross-Coupling for α-Oxycarbonyl-β-ketones: Esterification of Carboxylic Acids via a Decarboxylative Pathway. Org Lett 2023; 25:184-189. [PMID: 36562790 DOI: 10.1021/acs.orglett.2c04041] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Herein, the first merged photocatalytic pathway for the C-O cross-coupled esterification of carboxylic acids to α-oxycarbonyl-β-ketones has been demonstrated. Decarboxylation of α,β-unsaturated acids promotes the formation of the β-ketone fragment of the desired product. Water as the source of oxygen for the ketone segment and aerial oxygen as an oxidant make the present synthetic methodology green and sustainable. This new C═O and C-O bond-forming methodology takes place in a cascade manner under a dual Ir/Pd-catalytic pathway, with the liberation of H2O and CO2 as the only byproducts.
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Affiliation(s)
- Soumya Mondal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata, West Bengal 700032, India
| | - Subal Mondal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata, West Bengal 700032, India
| | - Siba P Midya
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata, West Bengal 700032, India
| | - Suman Das
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata, West Bengal 700032, India
| | - Sahidul Mondal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata, West Bengal 700032, India
| | - Pradyut Ghosh
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata, West Bengal 700032, India
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6
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Großmann LM, Beier V, Duttenhofer L, Lennartz L, Opatz T. An Iodide-Mediated Anodic Amide Coupling. Chemistry 2022; 28:e202201768. [PMID: 35835720 PMCID: PMC9804404 DOI: 10.1002/chem.202201768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Indexed: 01/05/2023]
Abstract
The ubiquity of amide bonds, present in natural products and common pharmaceuticals renders this functional group one of the most prevalent in organic chemistry. Despite its importance and a wide variety of existing methods for its formation, the latter still can be a challenge for classical activating reagents such as chloridating agents or carbodiimides. As the spent reagents often cannot be recycled, the development of more sustainable methods is highly desirable. Herein, we report an operationally simple and mild indirect electrochemical protocol to effect the condensation of carboxylic acids with amines, forming a wide variety of carboxamides.
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Affiliation(s)
- Luca Marius Großmann
- Department of ChemistryJohannes Gutenberg University MainzDuesbergweg 10–1455128MainzGermany
| | - Vera Beier
- Department of ChemistryJohannes Gutenberg University MainzDuesbergweg 10–1455128MainzGermany
| | - Lea Duttenhofer
- Department of ChemistryJohannes Gutenberg University MainzDuesbergweg 10–1455128MainzGermany
| | - Laura Lennartz
- Department of ChemistryJohannes Gutenberg University MainzDuesbergweg 10–1455128MainzGermany
| | - Till Opatz
- Department of ChemistryJohannes Gutenberg University MainzDuesbergweg 10–1455128MainzGermany
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7
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Zhou H, Liu Y, Xia H, Xu J, Wang T, Xu S. Direct Transformation of Alkylarenes into
N
‐(Pyridine‐2‐yl)amides by C(sp
3
)–C(sp
3
) Bond Cleavage. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Haipin Zhou
- College of Materials & Chemical Engineering Chuzhou University 1 West Huifeng Road 239000, Anhui Chouzhou China
| | - Yanpeng Liu
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry China Pharmaceutical University 24 Tong Jia Xiang 210009 Nanjing China
| | - Haidong Xia
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry China Pharmaceutical University 24 Tong Jia Xiang 210009 Nanjing China
| | - Jinyi Xu
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry China Pharmaceutical University 24 Tong Jia Xiang 210009 Nanjing China
| | - Tingfang Wang
- School of Medicine Shanghai University 99 Shangda Road 200444 Shanghai China
| | - Shengtao Xu
- College of Materials & Chemical Engineering Chuzhou University 1 West Huifeng Road 239000, Anhui Chouzhou China
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry China Pharmaceutical University 24 Tong Jia Xiang 210009 Nanjing China
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8
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Zhao P, Yu XX, Zhou Y, Huang C, Wu YD, Zhu YP, Wu AX. Arylacetylenes as two-carbon synthons: synthesis of eight-membered rings via C[triple bond, length as m-dash]C bond cleavage. Chem Commun (Camb) 2020; 56:12554-12557. [PMID: 32940307 DOI: 10.1039/d0cc05363e] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The first synthesis of eight-membered N-containing heterocycles by oxidative bicyclization/ring extension of arylacetylenes and aryl amines has been achieved. This protocol uses arylacetylene as an unusual two-carbon synthon by incorporating the two parts of the cracked C[triple bond, length as m-dash]C bond into the final product, which provides a new method for using arylacetylenes as two-carbon synthons and further enriches C[triple bond, length as m-dash]C bond cleavage methodology. Moreover, this multi-component reaction can provide diverse fused elegant eight-membered N-heterocycles under mild conditions with wide substrate scopes.
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Affiliation(s)
- Peng Zhao
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China.
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9
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Mas-Roselló J, Smejkal T, Cramer N. Iridium-catalyzed acid-assisted asymmetric hydrogenation of oximes to hydroxylamines. Science 2020; 368:1098-1102. [PMID: 32499437 DOI: 10.1126/science.abb2559] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 04/17/2020] [Indexed: 12/31/2022]
Abstract
Asymmetric hydrogenations are among the most practical methods for the synthesis of chiral building blocks at industrial scale. The selective reduction of an oxime to the corresponding chiral hydroxylamine derivative remains a challenging variant because of undesired cleavage of the weak nitrogen-oxygen bond. We report a robust cyclometalated iridium(III) complex bearing a chiral cyclopentadienyl ligand as an efficient catalyst for this reaction operating under highly acidic conditions. Valuable N-alkoxy amines can be accessed at room temperature with nondetected overreduction of the N‒O bond. Catalyst turnover numbers up to 4000 and enantiomeric ratios up to 98:2 are observed. The findings serve as a blueprint for the development of metal-catalyzed enantioselective hydrogenations of challenging substrates.
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Affiliation(s)
- Josep Mas-Roselló
- Ecole Polytechnique Fédérale de Lausanne (EPFL), School of Basic Sciences, Institute of Chemical Sciences and Engineering, Laboratory of Asymmetric Catalysis and Synthesis, BCH 4305, CH-1015 Lausanne, Switzerland
| | - Tomas Smejkal
- Syngenta Crop Protection AG, Process Chemistry Research, 4332 Stein AG, Switzerland
| | - Nicolai Cramer
- Ecole Polytechnique Fédérale de Lausanne (EPFL), School of Basic Sciences, Institute of Chemical Sciences and Engineering, Laboratory of Asymmetric Catalysis and Synthesis, BCH 4305, CH-1015 Lausanne, Switzerland.
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10
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Mu Y, Chen Y, Gao Y, Sun J, Iqbal Z, Wan Y, Yang M, Yang Z, Tang D. Ru‐Catalyzed O‐H Insertion of Sulfoxonium Ylide and Carboxylic Acid to Synthesize α‐Acyloxy Ketones. ChemistrySelect 2020. [DOI: 10.1002/slct.201903657] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yangxiu Mu
- Agricultural Resource and Environment Institute of Ningxia Academy of Agriculture and Forestry ScienceInstitution Ningxia Center of Agricultural Organic Synthesis Yinchuan 750002 P. R. China
| | - Yongxin Chen
- Northwest Institute of Eco-Environment and ResourcesChinese Academy of Sciences Lanzhou China
| | - Yuanyu Gao
- Agricultural Resource and Environment Institute of Ningxia Academy of Agriculture and Forestry ScienceInstitution Ningxia Center of Agricultural Organic Synthesis Yinchuan 750002 P. R. China
| | - Jian Sun
- Agricultural Resource and Environment Institute of Ningxia Academy of Agriculture and Forestry ScienceInstitution Ningxia Center of Agricultural Organic Synthesis Yinchuan 750002 P. R. China
| | - Zafar Iqbal
- Agricultural Resource and Environment Institute of Ningxia Academy of Agriculture and Forestry ScienceInstitution Ningxia Center of Agricultural Organic Synthesis Yinchuan 750002 P. R. China
| | - Yaya Wan
- Agricultural Resource and Environment Institute of Ningxia Academy of Agriculture and Forestry ScienceInstitution Ningxia Center of Agricultural Organic Synthesis Yinchuan 750002 P. R. China
| | | | - Zhixiang Yang
- Agricultural Resource and Environment Institute of Ningxia Academy of Agriculture and Forestry ScienceInstitution Ningxia Center of Agricultural Organic Synthesis Yinchuan 750002 P. R. China
| | - Dong Tang
- Agricultural Resource and Environment Institute of Ningxia Academy of Agriculture and Forestry ScienceInstitution Ningxia Center of Agricultural Organic Synthesis Yinchuan 750002 P. R. China
- Department of Chemistry Lishui University China
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11
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Katta N, Ojha M, Murugan A, Arepally S, Sharada DS. Visible light-mediated photocatalytic oxidative cleavage of activated alkynes via hydroamination: a direct approach to oxamates. RSC Adv 2020; 10:12599-12603. [PMID: 35497603 PMCID: PMC9051298 DOI: 10.1039/c9ra10555g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Accepted: 02/26/2020] [Indexed: 01/31/2023] Open
Abstract
The direct oxidative cleavage of activated alkynes via hydroamination has been described using organic photocatalyst under visible-light irradiation at room temperature. In this reaction, the single electron oxidation of an in situ formed enamine followed by radical coupling with an oxidant finally delivers the oxamate. The key features of this photocatalytic reaction are the mild reaction conditions, metal-free organic dye as a photocatalyst, and TBHP playing a dual role as “O” source and for the regeneration of the photocatalyst. The direct oxidative cleavage of activated alkynes via hydroamination has been described using organic photocatalyst under visible-light irradiation at room temperature.![]()
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Affiliation(s)
- Narenderreddy Katta
- Catalysis & Chemical Biology Laboratory
- Department of Chemistry Indian Institute of Technology Hyderabad
- Sangareddy
- India
| | - Mamata Ojha
- Catalysis & Chemical Biology Laboratory
- Department of Chemistry Indian Institute of Technology Hyderabad
- Sangareddy
- India
| | - Arumugavel Murugan
- Catalysis & Chemical Biology Laboratory
- Department of Chemistry Indian Institute of Technology Hyderabad
- Sangareddy
- India
| | - Sagar Arepally
- Catalysis & Chemical Biology Laboratory
- Department of Chemistry Indian Institute of Technology Hyderabad
- Sangareddy
- India
| | - Duddu S. Sharada
- Catalysis & Chemical Biology Laboratory
- Department of Chemistry Indian Institute of Technology Hyderabad
- Sangareddy
- India
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12
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Loukrakpam DC, Phukan P. Metal‐Free One‐Pot Conversion of Olefins and Alkynes to Amides Using TsNBr
2
, I
2
and Aqueous NH
3
at Room Temperature. ChemistrySelect 2019. [DOI: 10.1002/slct.201901530] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
| | - Prodeep Phukan
- Department of ChemistryGauhati University, Guwahati 781014 Assam India
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13
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Gao B, Sun Y, Wang J, Cao C, Yuan Z, Tian Y, Shi Y, Liu W. POCl
3
‐Mediated Reaction: A New Entry to Polysubstituted 2‐Pyridones
via
Self‐condensation of β‐Keto Amides. J Heterocycl Chem 2019. [DOI: 10.1002/jhet.3613] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Baochang Gao
- Institute of Composite Materials, Key Laboratory of Superlight Material and Surface Technology of Ministry of Education, College of Materials Science and Chemical EngineeringHarbin Engineering University Harbin 150001 P.R. China
- Daqing Branch of Heilongjiang Academy of Sciences Daqing 163319 P.R. China
| | - Yufeng Sun
- Daqing Branch of Heilongjiang Academy of Sciences Daqing 163319 P.R. China
| | - Jun Wang
- Institute of Composite Materials, Key Laboratory of Superlight Material and Surface Technology of Ministry of Education, College of Materials Science and Chemical EngineeringHarbin Engineering University Harbin 150001 P.R. China
| | - Chang Cao
- Chemistry and Chemical EngineeringNortheast Petroleum University Daqing 163319 P.R. China
| | - Zhigang Yuan
- Chemistry and Chemical EngineeringNortheast Petroleum University Daqing 163319 P.R. China
| | - Yuan Tian
- Daqing Branch of Heilongjiang Academy of Sciences Daqing 163319 P.R. China
| | - Yu Shi
- Daqing Branch of Heilongjiang Academy of Sciences Daqing 163319 P.R. China
| | - Wenbin Liu
- Institute of Composite Materials, Key Laboratory of Superlight Material and Surface Technology of Ministry of Education, College of Materials Science and Chemical EngineeringHarbin Engineering University Harbin 150001 P.R. China
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14
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Reddy TN, de Lima DP. Recent Advances in the Functionalization of Hydrocarbons: Synthesis of Amides and its Derivatives. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900317] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Thatikonda Narendar Reddy
- Instituto de Química (INQUI)Universidade Federal de Mato Grosso do Sul 179074-460 Campo Grande, MS Brazil
| | - Dênis Pires de Lima
- Instituto de Química (INQUI)Universidade Federal de Mato Grosso do Sul 179074-460 Campo Grande, MS Brazil
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15
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Liu B, Ning Y, Virelli M, Zanoni G, Anderson EA, Bi X. Direct Transformation of Terminal Alkynes into Amidines by a Silver-Catalyzed Four-Component Reaction. J Am Chem Soc 2019; 141:1593-1598. [PMID: 30667220 DOI: 10.1021/jacs.8b11039] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
An unprecedented conversion of terminal alkynes into N-sulfonimidamides (amidines) is reported by a silver-catalyzed, one-pot, four-component reaction with TMSN3, sodium sulfinate, and sulfonyl azide. The reaction scope includes both aromatic and aliphatic alkynes. A possible cascade reaction mechanism, consisting of alkyne hydroazidation, sulfonyl radical addition, 1,3-dipolar cycloaddition by TMSN3, and retro-1,3-dipolar cycloaddition, is proposed. TMSN3 is found to play an essential role in each step of the reaction.
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Affiliation(s)
- Binbin Liu
- Department of Chemistry , Northeast Normal University , Changchun 130024 , China
| | - Yongquan Ning
- Department of Chemistry , Northeast Normal University , Changchun 130024 , China
| | - Matteo Virelli
- Department of Chemistry , University of Pavia , Viale Taramelli 12 , 27100 , Pavia , Italy
| | - Giuseppe Zanoni
- Department of Chemistry , University of Pavia , Viale Taramelli 12 , 27100 , Pavia , Italy
| | - Edward A Anderson
- Chemistry Research Laboratory , University of Oxford , 12 Mansfield Road , Oxford OX1 3TA , United Kingdom
| | - Xihe Bi
- Department of Chemistry , Northeast Normal University , Changchun 130024 , China.,State Key Laboratory of Elemento-Organic Chemistry , Nankai University , Tianjin 300071 , China
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16
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Gao B, Sun Y, Wang J, Yuan Z, Zu L, Zhang X, Liu W. Efficient and divergent synthesis of polyfunctionalized 2-pyridones from β-keto amides. RSC Adv 2018; 8:33625-33630. [PMID: 35548816 PMCID: PMC9086556 DOI: 10.1039/c8ra05709e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 09/24/2018] [Indexed: 11/24/2022] Open
Abstract
Efficient and divergent one-pot synthesis of polyfunctionalized 2-pyridones from β-keto amides based on reaction condition selection was developed. The methodology offers several significant advantages including mild conditions, ease of handling, high yields, and a relatively broad range of substrates. Based on various experiments and observations, a plausible mechanism for the selective synthesis of 2-pyridones was proposed.
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Affiliation(s)
- Baochang Gao
- Institute of Composite Materials, Key Laboratory of Superlight Material and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University Harbin 150001 P. R. China
- Daqing Branch of Heilongjiang Academy of Sciences Daqing 163319 P. R. China
| | - Yufeng Sun
- Daqing Branch of Heilongjiang Academy of Sciences Daqing 163319 P. R. China
| | - Jun Wang
- Institute of Composite Materials, Key Laboratory of Superlight Material and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University Harbin 150001 P. R. China
| | - Zhigang Yuan
- Daqing Branch of Heilongjiang Academy of Sciences Daqing 163319 P. R. China
| | - Liwu Zu
- Institute of Composite Materials, Key Laboratory of Superlight Material and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University Harbin 150001 P. R. China
| | - Xu Zhang
- Daqing Branch of Heilongjiang Academy of Sciences Daqing 163319 P. R. China
| | - Wenbin Liu
- Institute of Composite Materials, Key Laboratory of Superlight Material and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University Harbin 150001 P. R. China
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17
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Xu K, Li Z, Cheng F, Zuo Z, Wang T, Wang M, Liu L. Transition-Metal-Free Cleavage of C–C Triple Bonds in Aromatic Alkynes with S8 and Amides Leading to Aryl Thioamides. Org Lett 2018; 20:2228-2231. [DOI: 10.1021/acs.orglett.8b00573] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
| | | | | | - Zhenzhen Zuo
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
| | | | - Mincan Wang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Lantao Liu
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
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18
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Kolle S, Batra S. Transformations of alkynes to carboxylic acids and their derivatives via C[triple bond, length as m-dash]C bond cleavage. Org Biomol Chem 2018; 14:11048-11060. [PMID: 27805215 DOI: 10.1039/c6ob01912a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Alkynes are building blocks of high synthetic value and their usefulness as precursors to many chemical and biological systems is widely established. Amongst several transformations of alkynes, cleavage of the C[triple bond, length as m-dash]C bond for obtaining diverse compounds is considered to be important. This review, in particular, comprehensively assimilates the transformations of alkynes to carboxylic acids including esters, amides and nitriles resulting from the cleavage of the C[triple bond, length as m-dash]C bond either under the influence of a metal catalyst or via a metal-free approach.
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Affiliation(s)
- Shivalinga Kolle
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, India.
| | - Sanjay Batra
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, India. and Academy of Scientific and Innovative Research, New Delhi 110025, India
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19
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Ma C, Fan G, Wu P, Li Z, Zhou Y, Ding Q, Zhang W. 1,3-Dibromo-5,5-dimethylhydantoin mediated oxidative amidation of terminal alkenes in water. Org Biomol Chem 2017; 15:9889-9894. [PMID: 29143847 DOI: 10.1039/c7ob02329d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A variety of terminal alkenes were converted to the corresponding amides in yields of 25 to 86% in water via treatment with 1,3-dibromo-5,5-dimethylhydantoin, followed by reaction with molecular iodine and aq. NH3 (or amine) in one pot. This metal- and organic solvent-free protocol is not only suitable for styrene derivatives, but also, for the first time, works well on terminal aliphatic alkenes.
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Affiliation(s)
- Chunhua Ma
- School of Chemistry and Chemical Engineering, Henan Normal University, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions of Ministry of Education, Xinxiang 453007, China
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20
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Zhao Z, Peng Z, Zhao Y, Liu H, Li C, Zhao J. Hypervalent Iodine-Mediated Oxidative Rearrangement of N–H Ketimines: An Umpolung Approach to Amides. J Org Chem 2017; 82:11848-11853. [DOI: 10.1021/acs.joc.7b01468] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zhenguang Zhao
- Key Laboratory of Chemical
Biology of Jiangxi Province, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, People’s Republic of China
| | - Zhiyuan Peng
- Key Laboratory of Chemical
Biology of Jiangxi Province, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, People’s Republic of China
| | - Yongli Zhao
- Key Laboratory of Chemical
Biology of Jiangxi Province, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, People’s Republic of China
| | - Hao Liu
- Key Laboratory of Chemical
Biology of Jiangxi Province, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, People’s Republic of China
| | - Chongnan Li
- Key Laboratory of Chemical
Biology of Jiangxi Province, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, People’s Republic of China
| | - Junfeng Zhao
- Key Laboratory of Chemical
Biology of Jiangxi Province, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, People’s Republic of China
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21
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Häring AP, Biallas P, Kirsch SF. An Unconventional Reaction of 2,2-Diazido Acylacetates with Amines. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601625] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Andreas P. Häring
- Organic Chemistry; Bergische Universität Wuppertal; Gaußstraße 20 42119 Wuppertal Germany
| | - Phillip Biallas
- Organic Chemistry; Bergische Universität Wuppertal; Gaußstraße 20 42119 Wuppertal Germany
| | - Stefan F. Kirsch
- Organic Chemistry; Bergische Universität Wuppertal; Gaußstraße 20 42119 Wuppertal Germany
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22
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Kwong HC, Chidan Kumar CS, Mah SH, Chia TS, Quah CK, Loh ZH, Chandraju S, Lim GK. Novel biphenyl ester derivatives as tyrosinase inhibitors: Synthesis, crystallographic, spectral analysis and molecular docking studies. PLoS One 2017; 12:e0170117. [PMID: 28241010 PMCID: PMC5328250 DOI: 10.1371/journal.pone.0170117] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 12/29/2016] [Indexed: 11/18/2022] Open
Abstract
Biphenyl-based compounds are clinically important for the treatments of hypertension and inflammatory, while many more are under development for pharmaceutical uses. In the present study, a series of 2-([1,1'-biphenyl]-4-yl)-2-oxoethyl benzoates, 2(a-q), and 2-([1,1'-biphenyl]-4-yl)-2-oxoethyl pyridinecarboxylate, 2(r-s) were synthesized by reacting 1-([1,1'-biphenyl]-4-yl)-2-bromoethan-1-one with various carboxylic acids using potassium carbonate in dimethylformamide at ambient temperature. Single-crystal X-ray diffraction studies revealed a more closely packed crystal structure can be produced by introduction of biphenyl moiety. Five of the compounds among the reported series exhibited significant anti-tyrosinase activities, in which 2p, 2r and 2s displayed good inhibitions which are comparable to standard inhibitor kojic acid at concentrations of 100 and 250 μg/mL. The inhibitory effects of these active compounds were further confirmed by computational molecular docking studies and the results revealed the primary binding site is active-site entrance instead of inner copper binding site which acted as the secondary binding site.
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Affiliation(s)
- Huey Chong Kwong
- School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia
| | - C. S. Chidan Kumar
- Department of Engineering Chemistry, Vidya Vikas Institute of Engineering & Technology, Visvesvaraya Technological University, Alanahalli, Mysuru, Karnataka, India
- * E-mail: (CKQ); (CSCK)
| | - Siau Hui Mah
- School of Biosciences, Taylor’s University, Lakeside Campus, Subang Jaya, Selangor, Malaysia
| | - Tze Shyang Chia
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, Penang, Malaysia
| | - Ching Kheng Quah
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, Penang, Malaysia
- * E-mail: (CKQ); (CSCK)
| | - Zi Han Loh
- School of Biosciences, Taylor’s University, Lakeside Campus, Subang Jaya, Selangor, Malaysia
| | - Siddegowda Chandraju
- Department of Sugar Technology & Chemistry, Sir M.V. PG Center, University of Mysore, Tubinakere, India
| | - Gin Keat Lim
- School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia
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23
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Boroujeni MB, Hashemzadeh A, Shaabani A, Amini MM. In situ
synthesis of metallophthalocyanines into pores of MIL-101: A novel and green strategy for preparation of host-guest catalysts. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.3715] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Alireza Hashemzadeh
- Faculty of Chemistry; Shahid Beheshti University; GC, PO Box 19396-4716 Tehran Iran
| | - Ahmad Shaabani
- Faculty of Chemistry; Shahid Beheshti University; GC, PO Box 19396-4716 Tehran Iran
| | - Mostafa M. Amini
- Faculty of Chemistry; Shahid Beheshti University; GC, PO Box 19396-4716 Tehran Iran
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24
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Abstract
The present review offers an overview of nonclassical (e.g., with no pre- or in situ activation of a carboxylic acid partner) approaches for the construction of amide bonds. The review aims to comprehensively discuss relevant work, which was mainly done in the field in the last 20 years. Organization of the data follows a subdivision according to substrate classes: catalytic direct formation of amides from carboxylic and amines ( section 2 ); the use of carboxylic acid surrogates ( section 3 ); and the use of amine surrogates ( section 4 ). The ligation strategies (NCL, Staudinger, KAHA, KATs, etc.) that could involve both carboxylic acid and amine surrogates are treated separately in section 5 .
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Affiliation(s)
- Renata Marcia de Figueiredo
- Institut Charles Gerhardt de Montpellier (ICGM), UMR 5253-CNRS-UM-ENSCM, Ecole Nationale Supérieure de Chimie , 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
| | - Jean-Simon Suppo
- Institut Charles Gerhardt de Montpellier (ICGM), UMR 5253-CNRS-UM-ENSCM, Ecole Nationale Supérieure de Chimie , 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
| | - Jean-Marc Campagne
- Institut Charles Gerhardt de Montpellier (ICGM), UMR 5253-CNRS-UM-ENSCM, Ecole Nationale Supérieure de Chimie , 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
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25
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Mondal R, Khamarui S, Maiti DK. CuBr-ZnI 2 Combo-Catalysis for Mild Cu I-Cu III Switching and sp 2 C-H Activated Rapid Cyclization to Quinolines and Their Sugar-Based Chiral Analogues: A UV-Vis and XPS Study. ACS OMEGA 2016; 1:251-263. [PMID: 31457128 PMCID: PMC6640751 DOI: 10.1021/acsomega.6b00185] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 08/15/2016] [Indexed: 06/10/2023]
Abstract
An unprecedented CuBr-ZnI2 combo-catalyzed mild Cu1-CuIII switching activation of sp2 C-H of highly electron-rich arenes is reported. Anilines, aldehydes, and terminal alkynes were rapidly coupled together at ambient temperature to construct a ubiquitous quinoline framework through cyclization of the C≡C bond. This smart solvent-free strategy was exploited for the direct synthesis of valuable 4-substituted, 2,4-disubstituted, and thermally labile sugar-based chiral quinolines in good yields. In contrast to the frequently used imine-alkyne cyclization reaction, this uncommonly mild CuI-CuIII combo-catalysis for a rapid three-component cyclization is expected to proceed through the formation of a flexible propargyl amine intermediate, which provides a CuI-procatalyst for rapid sp2 C-H activation with cyclization involving transient CuIII species. The in situ generation of transient CuIII species was confirmed through online ultraviolet-visible spectroscopy (UV-vis), electrospray ionization mass spectrometry (ESI-MS), and X-ray photoelectron spectroscopy (XPS) analyses.
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26
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Liu X, Cong T, Liu P, Sun P. Synthesis of 1,2-Diketones via a Metal-Free, Visible-Light-Induced Aerobic Photooxidation of Alkynes. J Org Chem 2016; 81:7256-61. [DOI: 10.1021/acs.joc.6b00097] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xu Liu
- College
of Chemistry and
Materials Science, Jiangsu Provincial Key Laboratory of Material Cycle
Processes and Pollution Control, Jiangsu Collaborative Innovation
Center of Biomedical Functional Materials, Nanjing Normal University, Nanjing 210023, China
| | - Tiantian Cong
- College
of Chemistry and
Materials Science, Jiangsu Provincial Key Laboratory of Material Cycle
Processes and Pollution Control, Jiangsu Collaborative Innovation
Center of Biomedical Functional Materials, Nanjing Normal University, Nanjing 210023, China
| | - Ping Liu
- College
of Chemistry and
Materials Science, Jiangsu Provincial Key Laboratory of Material Cycle
Processes and Pollution Control, Jiangsu Collaborative Innovation
Center of Biomedical Functional Materials, Nanjing Normal University, Nanjing 210023, China
| | - Peipei Sun
- College
of Chemistry and
Materials Science, Jiangsu Provincial Key Laboratory of Material Cycle
Processes and Pollution Control, Jiangsu Collaborative Innovation
Center of Biomedical Functional Materials, Nanjing Normal University, Nanjing 210023, China
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27
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Li J, Lear MJ, Kwon E, Hayashi Y. Mechanism of Oxidative Amidation of Nitroalkanes with Oxygen and Amine Nucleophiles by Using Electrophilic Iodine. Chemistry 2016; 22:5538-42. [DOI: 10.1002/chem.201600540] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Jing Li
- Department of Chemistry; Graduate School of Science; Tohoku University; Aza Aramaki, Aoba-ku Sendai 980-8578 Japan
| | - Martin J. Lear
- School of Chemistry; University of Lincoln; Brayford Pool Lincoln LN6 7TS UK
| | - Eunsang Kwon
- Research and Analytical Center for Giant Molecules, Graduate School of Science; Tohoku University; Sendai 980-8578 Japan
| | - Yujiro Hayashi
- Department of Chemistry; Graduate School of Science; Tohoku University; Aza Aramaki, Aoba-ku Sendai 980-8578 Japan
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28
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Huang H, Yang Q, Zhang Q, Wu J, Liu Y, Song C, Chang J. A Hofmann Rearrangement-Ring Expansion Cascade for the Synthesis of 1-Pyrrolines: Application to the Synthesis of 2,3-Dihydro-1H-pyrrolo[2,1-a]isoquinolinium Salts. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201501071] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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29
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Dighe SU, Batra S. Visible Light-Induced Iodine-Catalyzed Transformation of Terminal Alkynes to Primary AmidesviaCC Bond Cleavage under Aqueous Conditions. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201500906] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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30
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Laha RM, Khamarui S, Manna SK, Maiti DK. In Situ Generated AgII-Catalyzed Selective Oxo-Esterification of Alkyne with Alcohol to α-Ketoester: Photophysical Study. Org Lett 2015; 18:144-7. [DOI: 10.1021/acs.orglett.5b03484] [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)
- Radha M. Laha
- Department of Chemistry, University of Calcutta, University College of Science, 92 A. P. C. Road, Kolkata 700009, India
| | - Saikat Khamarui
- Department of Chemistry, University of Calcutta, University College of Science, 92 A. P. C. Road, Kolkata 700009, India
| | - Saikat K. Manna
- Department of Chemistry, University of Calcutta, University College of Science, 92 A. P. C. Road, Kolkata 700009, India
| | - Dilip K. Maiti
- Department of Chemistry, University of Calcutta, University College of Science, 92 A. P. C. Road, Kolkata 700009, India
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31
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Khamarui S, Maiti R, Mondal RR, Maiti DK. Reactant cum solvent water: generation of transient λ3-hypervalent iodine, its reactivity, mechanism and broad application. RSC Adv 2015. [DOI: 10.1039/c5ra21932a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
We have demonstrated a benign strategy for amides, imides and their chiral analogues using water as a source of carbonyl oxygen and medium. DFT-MIR studies and controlled experiments established the mechanism involving PhI(OH)2-bearing intermediates.
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Affiliation(s)
- Saikat Khamarui
- Department of Chemistry
- University of Calcutta
- University College of Science
- Kolkata-700009
- India
| | - Rituparna Maiti
- Department of Chemistry
- University of Calcutta
- University College of Science
- Kolkata-700009
- India
| | - Ramij R. Mondal
- Department of Chemistry
- University of Calcutta
- University College of Science
- Kolkata-700009
- India
| | - Dilip K. Maiti
- Department of Chemistry
- University of Calcutta
- University College of Science
- Kolkata-700009
- India
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32
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Rahaman H, Laha RM, Maiti DK, Ghosh SK. Fabrication of Mn2O3 nanorods: an efficient catalyst for selective transformation of alcohols to aldehydes. RSC Adv 2015. [DOI: 10.1039/c5ra02504d] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Self-assembled high surface area Mn2O3 nanorods have been fabricated through an effective polymer–surfactant interaction and their outstanding catalytic property for the selective transformation of alcohols to aldehydes has been discovered.
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Affiliation(s)
| | - Radha M. Laha
- Department of Chemistry
- University of Calcutta
- Kolkata-700009
- India
| | - Dilip K. Maiti
- Department of Chemistry
- University of Calcutta
- Kolkata-700009
- India
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33
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Pramanik N, Sarkar S, Roy D, Debnath S, Ghosh S, Khamarui S, Maiti DK. Synthesis and diverse general oxidative cyclization catalysis of high-valent MoVIO2(HL) to ubiquitous heterocycles and their chiral analogues with high selectivity. RSC Adv 2015. [DOI: 10.1039/c5ra21825j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The first synthesis and diverse oxidative cyclization catalysis properties of high-valent MoVI–triazole are demonstrated towards highly selective construction of benzimidazoles, benzothiazoles, isoxazolines, isoxazoles and their chiral analogues.
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Affiliation(s)
| | - Satinath Sarkar
- Department of Chemistry
- University of Calcutta
- Kolkata-700009
- India
| | - Dipanwita Roy
- Department of Chemistry
- University of Calcutta
- Kolkata-700009
- India
| | - Sudipto Debnath
- Department of Chemistry
- University of Calcutta
- Kolkata-700009
- India
| | - Sukla Ghosh
- Department of Chemistry
- University of Calcutta
- Kolkata-700009
- India
| | - Saikat Khamarui
- Department of Chemistry
- University of Calcutta
- Kolkata-700009
- India
| | - Dilip K. Maiti
- Department of Chemistry
- University of Calcutta
- Kolkata-700009
- India
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34
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Roy D, Sarkar S, Laha RM, Pramanik N, Maiti DK. Ni(0)–Cu(i): a powerful combo catalyst for simultaneous coupling and cleavage of the C–N bond with cyclization to valuable amide-based pyrroles and 4-pyridones. RSC Adv 2015. [DOI: 10.1039/c5ra12115a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
We demonstrate unprecedented Ni(0)–Cu(i) combo catalysis for sequential bond activated domino N–C/C–C coupled annulation with N–C bond cleavage to afford valuable amide-based polysubstituted pyrroles and 4-pyridones selectively from β-ketoanilides.
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Affiliation(s)
- Dipanwita Roy
- Department of Chemistry
- University of Calcutta
- Kolkata-700009
- India
| | - Satinath Sarkar
- Department of Chemistry
- University of Calcutta
- Kolkata-700009
- India
| | - Radha M. Laha
- Department of Chemistry
- University of Calcutta
- Kolkata-700009
- India
| | | | - Dilip K. Maiti
- Department of Chemistry
- University of Calcutta
- Kolkata-700009
- India
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