1
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Wang W, Qin Z, Zhang X, Zhao W, Yang W. Catalyst-free C(sp 3)-H functionalization of methyl azaarenes with heteroaromatic trifluoromethyl ketone hydrates: "all-water" synthesis of α-trifluoromethyl tertiary alcohols. Org Biomol Chem 2023; 21:4304-4308. [PMID: 37161518 DOI: 10.1039/d3ob00566f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
An efficient catalyst-free C(sp3)-H bond functionalization of methyl azaarenes with heteroaromatic trifluoromethyl ketone hydrates in neat water has been developed for the synthesis of α-trifluoromethyl tertiary alcohols bearing N-heteroaromatics. This method not only features excellent efficiency, broad substrate scope, catalyst-free conditions, and easy gram-scale preparation but also represents a new and rare example of "all-water" synthesis of trifluoromethylated molecules.
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Affiliation(s)
- Wei Wang
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P. R. China.
| | - Zhaoliang Qin
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P. R. China.
| | - Xinhui Zhang
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P. R. China.
| | - Wanxiang Zhao
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P. R. China.
| | - Wen Yang
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P. R. China.
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2
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Catalyst- and solvent-free coupling of 2-methyl quinazolinones and 3-(trifluoroacetyl)coumarins: An environmentally benign access of quinazolinone derivatives. JOURNAL OF SAUDI CHEMICAL SOCIETY 2023. [DOI: 10.1016/j.jscs.2023.101621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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3
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Zhou B, Yang G, Wang C, Liu L, Shi L, Pan Z, Ji X, Wu L, Zheng H, Xu C, Fan L. Highly Chemoselective Synthesis of Azaarene-Equipped CF 3-Tertiary Alcohols under Metal-Free Conditions and Their Fungicidal Activities. ACS OMEGA 2022; 7:38084-38093. [PMID: 36312435 PMCID: PMC9609063 DOI: 10.1021/acsomega.2c05855] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 09/29/2022] [Indexed: 05/16/2023]
Abstract
A highly chemoselective reaction between α,β-unsaturated trifluoromethyl ketones with azaarenes under metal-free conditions was carried out, affording a range of valuable azaarene-equipped CF3-tertiary alcohols in moderate to excellent yields (up to 95% yield) with good tolerance of functional groups, and their structures were confirmed by NMR, HRMS, and X-ray diffraction for validation. This method features simple reaction conditions (only solvent), high atom- and step-economy, and broad substrate scope. Moreover, most of the target products exhibited promising fungicidal activities, and compound 3al exhibited 91.65% fungicidal activity against R. solani, with an EC50 value of 0.18 mg/mL.
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Affiliation(s)
- Bingyi Zhou
- College
of Sciences, Henan Agricultural University, Zhengzhou 450002, China
- College
of Tobacco Sciences, Henan Agricultural
University, Zhengzhou 450002, China
| | - Guoyu Yang
- College
of Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Caixia Wang
- College
of Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Lijie Liu
- College
of Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Lijun Shi
- College
of Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Zhenliang Pan
- College
of Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Xiaoming Ji
- College
of Tobacco Sciences, Henan Agricultural
University, Zhengzhou 450002, China
| | - Lulu Wu
- College
of Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Huayu Zheng
- College
of Sciences, Chang’an University, Xi’an 710064, China
| | - Cuilian Xu
- College
of Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Liangxin Fan
- College
of Sciences, Henan Agricultural University, Zhengzhou 450002, China
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4
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Lim JA, Teo YC. Iron-catalyzed benzylic addition of 2-methyl azaarenes to substituted trifluoromethyl ketones. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2020.1867178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Jiayu Alicia Lim
- Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore, Singapore
| | - Yong-Chua Teo
- Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore, Singapore
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5
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Latha DS, Yaragorla S. C(sp3
)-H Functionalization of 2-Methyl Azaarenes: Highly Facile Approach to Aza-Heterocyclic Compounds. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901899] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Dandugula Sneha Latha
- School of Chemistry; University of Hyderabad; P.O. Central University, Gachibowli; 500046 Hyderabad India
| | - Srinivasarao Yaragorla
- School of Chemistry; University of Hyderabad; P.O. Central University, Gachibowli; 500046 Hyderabad India
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6
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Kaur M, Van Humbeck JF. Recent trends in catalytic sp 3 C-H functionalization of heterocycles. Org Biomol Chem 2020; 18:606-617. [PMID: 31912069 DOI: 10.1039/c9ob01559k] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Heterocycles are a ubiquitous substructure in organic small molecules designed for use in materials and medicines. Recent work in catalysis has focused on enabling access to new heterocycle structures by sp3 C-H functionalization on alkyl side-chain substituents-especially at the heterobenzylic position-with more than two hundred manuscripts published just within the last ten years. Rather than describing in detail each of these reports, in this mini-review we attempt to highlight gaps in existing techniques. A semi-quantitative overview of ongoing work strongly suggests that several specific heterocycle types and bond formations outside of C-C, C-N, and C-O have been almost completely overlooked.
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Affiliation(s)
- Milanpreet Kaur
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4.
| | - Jeffrey F Van Humbeck
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4.
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7
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Affiliation(s)
- Marta Meazza
- School of Chemistry, Highfield CampusUniversity of Southampton University Road Southampton SO17 1BJ UK
| | - Ramon Rios
- School of Chemistry, Highfield CampusUniversity of Southampton University Road Southampton SO17 1BJ UK
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8
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Parveen N, Muthukumar A, Sekar G. Ligand‐Free and Reusable Palladium Nanoparticles‐Catalyzed Alkylation of 2‐Alkylazaarenes with Activated Ketones under Neutral Conditions. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900447] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Naziya Parveen
- Department of ChemistryIndian Institute of Technology Madras Chennai – 600036 India
| | - Alagesan Muthukumar
- Department of ChemistryIndian Institute of Technology Madras Chennai – 600036 India
| | - Govindasamy Sekar
- Department of ChemistryIndian Institute of Technology Madras Chennai – 600036 India
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9
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Roslan II, Ng KH, Chuah GK, Jaenicke S. Reagent-controlled regiodivergent intermolecular cyclization of 2-aminobenzothiazoles with β-ketoesters and β-ketoamides. Beilstein J Org Chem 2017; 13:2739-2750. [PMID: 29564009 PMCID: PMC5753174 DOI: 10.3762/bjoc.13.270] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 12/05/2017] [Indexed: 12/12/2022] Open
Abstract
Two regiodivergent approaches to intermolecular cyclization of 2-aminobenzothiazoles with β-ketoesters and amides have been developed, controlled by the reagents employed. With the Brønsted base KOt-Bu and CBrCl3 as radical initiator, benzo[d]imidazo[2,1-b]thiazoles are synthesized via attack at the α-carbon and keto carbon of the β-ketoester moiety. In contrast, switching to the Lewis acid catalyst, In(OTf)3, results in the regioselective nucleophilic attack at both carbonyl groups forming benzo[4,5]thiazolo[3,2-a]pyrimidin-4-ones instead.
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Affiliation(s)
- Irwan Iskandar Roslan
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Kian-Hong Ng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Gaik-Khuan Chuah
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Stephan Jaenicke
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
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10
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Oxidative C sp3 -H functionalization of 2-methylazaarenes: A practical synthesis of 2-azaarenyl-benzimidazoles and benzothiazoles. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.04.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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11
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Synergistic Diastereo‐ and Enantioselective Functionalization of Unactivated Alkyl Quinolines with α,β‐Unsaturated Aldehydes. Angew Chem Int Ed Engl 2017; 56:1634-1638. [DOI: 10.1002/anie.201611306] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Indexed: 12/17/2022]
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12
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Meazza M, Tur F, Hammer N, Jørgensen KA. Synergistic Diastereo- and Enantioselective Functionalization of Unactivated Alkyl Quinolines with α,β-Unsaturated Aldehydes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611306] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Marta Meazza
- Department of Chemistry; Aarhus University; 8000 Aarhus C Denmark
| | - Fernando Tur
- Department of Chemistry; Aarhus University; 8000 Aarhus C Denmark
| | - Niels Hammer
- Department of Chemistry; Aarhus University; 8000 Aarhus C Denmark
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13
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Sun Q, Xie P, Yuan D, Xia Y, Yao Y. Regioselective addition of C(sp3)–H bonds of alkyl pyridines to olefins catalysed by cationic zirconium complexes. Chem Commun (Camb) 2017; 53:7401-7404. [DOI: 10.1039/c7cc03263c] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first group 4 metal catalysts are developed to catalyse C(sp3)–H addition of alkyl pyridines to olefins. Ligand-controlled regioselectivity was observed and verified.
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Affiliation(s)
- Qiu Sun
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Peipei Xie
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou 325035
- People's Republic of China
| | - Dan Yuan
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Yuanzhi Xia
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou 325035
- People's Republic of China
| | - Yingming Yao
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
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14
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Muthukumar A, Sekar G. Zinc-catalyzed chemoselective alkylation of α-keto amides with 2-alkylazaarenes. Org Biomol Chem 2017; 15:691-700. [DOI: 10.1039/c6ob02432g] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
A zinc-catalyzed C(sp3)–H addition of 2-alkylazaarenes to α-keto amides to furnish azaarene incorporated α-hydroxy amides has been developed for the first time. Chemoselective alkylation of the keto functionality of the α-keto amides in the presence of isolated ketones is the key advantage of this Zn-catalyzed protocol.
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Affiliation(s)
| | - Govindasamy Sekar
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai
- India
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15
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Lai S, Ren X, Zhao J, Tang Z, Li G. Simple Brønsted acid catalyzed C–H functionalization: efficient access to poly-substituted pyridines. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.05.061] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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16
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Jamal Z, Teo YC, Lim GS. Direct alkenylation of alkylazaarenes with aldehydes through C(sp3)–H functionalization under catalytic InCl3 activation. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.03.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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17
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Liu H, Zhai T, Ding S, Hou Y, Zhang X, Feng L, Ma C. Direct and metal-free oxidative amination of sp3 C–H bonds for the construction of 2-hetarylquinazolin-4(3H)-ones. Org Chem Front 2016. [DOI: 10.1039/c6qo00231e] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New method for synthesis of 2-hetarylquinazolin-4(3H)-ones from 2-aminobenzamides and (2-azaaryl)methanes under transition-metal free conditions, featuring a wide substrate scope with a broad range of functional group tolerance under mild conditions.
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Affiliation(s)
- Huanhuan Liu
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P. R. China
| | - Tianran Zhai
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P. R. China
| | - Shiteng Ding
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P. R. China
| | - Yalei Hou
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P. R. China
| | - Xiangyu Zhang
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P. R. China
| | - Lei Feng
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P. R. China
| | - Chen Ma
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P. R. China
- State Key Laboratory of Natural and Biomimetic Drugs
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