1
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Zhang C, Yu Z, Ding Y, Shi Y, Xie Y. Metal-free electrochemistry promoted radical cascade cyclization to access CF 3-containing benzimidazo[2,1- a]isoquinolin-6(5 H)-ones. Org Biomol Chem 2023; 21:6715-6718. [PMID: 37462425 DOI: 10.1039/d3ob00854a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
Using CF3SO2Na as the CF3 radical source, an eco-friendly approach for electrochemistry-mediated radical cascade cyclization of N-methacryloyl-2-phenylbenzoimidazoles was described. This reaction features mild reaction conditions, readily available substrates, and moderate to good yields through the construction of two C-C bonds in one step.
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Affiliation(s)
- Changjun Zhang
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, 310014, China.
| | - Zhichen Yu
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, 310014, China.
| | - Yuxin Ding
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, 310014, China.
| | - Yuan Shi
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, 310014, China.
| | - Yuanyuan Xie
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, 310014, China.
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, 310014, China
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, Key Laboratory of Pharmaceutical Engineering of Zhejiang Province, Hangzhou, 310014, China
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2
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Synthesis of Ester-Containing Chroman-4-Ones via Cascade Radical Annulation of 2-(Allyloxy)Arylaldehydes with Oxalates under Metal Free Conditions. Int J Mol Sci 2023; 24:ijms24055028. [PMID: 36902464 PMCID: PMC10003100 DOI: 10.3390/ijms24055028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 02/23/2023] [Accepted: 03/01/2023] [Indexed: 03/08/2023] Open
Abstract
A convenient and practical method for the synthesis of bioactive ester-containing chroman-4-ones through the cascade radical cyclization of 2-(allyloxy)arylaldehydes and oxalates is described. The preliminary studies suggest that an alkoxycarbonyl radical might be involved in the current transformation, which was generated via the decarboxylation of oxalates in the presence of (NH4)2S2O8.
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3
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Liu X, Yuan S, Liu Y, Ni M, Xu J, Gui S, Peng YY, Ding Q. Mn(III)-Mediated Radical Addition/Cyclization of Isocyanides with Aryl Boronic Acids/Diarylphosphine Oxides: Access to 11-Functionalized Dibenzodiazepines. J Org Chem 2023; 88:198-210. [PMID: 36548987 DOI: 10.1021/acs.joc.2c02059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A Mn(III)-mediated radical addition/cyclization reaction of isocyanides with aryl boronic acids/diarylphosphine oxides has been developed. A series of 11-arylated/-phosphorylated dibenzodiazepines were efficiently constructed in moderate to excellent yields under mild reaction conditions via imidoyl radical process. The present protocol offers novel access to functionalized seven-membered N-heterocycles.
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Affiliation(s)
- Xuan Liu
- National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Key Laboratory for Green Chemistry of Jiangxi Province, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
| | - Sitian Yuan
- National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Key Laboratory for Green Chemistry of Jiangxi Province, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
| | - Yi Liu
- National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Key Laboratory for Green Chemistry of Jiangxi Province, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
| | - Mengjia Ni
- National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Key Laboratory for Green Chemistry of Jiangxi Province, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
| | - Jianbo Xu
- National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Key Laboratory for Green Chemistry of Jiangxi Province, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
| | - Shuanggen Gui
- National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Key Laboratory for Green Chemistry of Jiangxi Province, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
| | - Yi-Yuan Peng
- National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Key Laboratory for Green Chemistry of Jiangxi Province, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
| | - Qiuping Ding
- National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Key Laboratory for Green Chemistry of Jiangxi Province, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
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4
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Ye YF, Li F, Chen JL, An ZQ, Zhang GY, Wang YB. Transition-Metal-Free Synthesis of 3-Acyl Chromones by the Tandem Reaction of Ynones and Methyl Salicylates. J Org Chem 2022; 87:14005-14015. [PMID: 36210518 DOI: 10.1021/acs.joc.2c01637] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A facile and effective tandem reaction of ynones and methyl salicylates was developed to obtain a broad range of 3-acyl chromones in moderate-to-excellent yields. This protocol underwent a Michael addition and cyclization process, which exhibited easily accessible substrates, broad substrate scope, and high regioselectivity under mild and transition-metal-free conditions. Moreover, gram-scale reaction and further chemical transformation of the products were also further studied.
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Affiliation(s)
- Ya-Fang Ye
- Henan Engineering Research Center of Functional Materials and Catalytic Reaction, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Feng Li
- Henan Engineering Research Center of Functional Materials and Catalytic Reaction, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Jia-Le Chen
- Henan Engineering Research Center of Functional Materials and Catalytic Reaction, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Zi-Qian An
- Henan Engineering Research Center of Functional Materials and Catalytic Reaction, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Gui-Ying Zhang
- Henan Engineering Research Center of Functional Materials and Catalytic Reaction, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Yan-Bo Wang
- Henan Engineering Research Center of Functional Materials and Catalytic Reaction, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
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5
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Xie LY, Peng S, Yang LH, Liu XW. Metal-Free Synthesis of Carbamoylated Chroman-4-Ones via Cascade Radical Annulation of 2-(Allyloxy)arylaldehydes with Oxamic Acids. Molecules 2022; 27:molecules27207049. [PMID: 36296640 PMCID: PMC9609457 DOI: 10.3390/molecules27207049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 10/12/2022] [Accepted: 10/12/2022] [Indexed: 11/17/2022] Open
Abstract
An efficient and straightforward approach for the synthesis of carbamoylated chroman-4-ones has been well-developed. The reaction is triggered through the generation of carbamoyl radicals from oxamic acids under metal-free conditions, which subsequently undergoes decarboxylative radical cascade cyclization on 2-(allyloxy)arylaldehydes to afford various amide-containing chroman-4-one scaffolds with high functional group tolerance and a broad substrate scope.
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6
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Mao LL, Zhou AX, Zhu XH, Peng H, Quan LX, Wan JP, Yang SD. Visible-Light-Mediated Tandem Difluoromethylation/Cyclization of Alkenyl Aldehydes toward CF 2H-Substituted Chroman-4-one Derivatives. J Org Chem 2022; 87:12414-12423. [PMID: 36007244 DOI: 10.1021/acs.joc.2c01689] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient and facile visible-light-mediated tandem difluoromethylation/cyclization of alkenyl aldehydes, with easily accessible and air-stable [Ph3PCF2H]+Br- as the difluoromethylation reagent, has been established. A range of CF2H-substituted chroman-4-one skeletons and their derivatives, such as 2,3-dihydroquinolin-4(1H)-ones, chroman, 3,4-dihydronaphthalen-1(2H)-one, 2,3-dihydrobenzofuran, and 2,3-dihydro-1H-inden-1-one, are efficiently produced in moderate to good yields with excellent chemoselectivity under mild reaction conditions.
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Affiliation(s)
- Liu-Liang Mao
- College of Chemistry and Environment Science, Shangrao Normal University, Shangrao 334001, China
| | - An-Xi Zhou
- College of Chemistry and Environment Science, Shangrao Normal University, Shangrao 334001, China
| | - Xian-Hong Zhu
- College of Chemistry and Environment Science, Shangrao Normal University, Shangrao 334001, China
| | - Huanan Peng
- College of Chemistry and Environment Science, Shangrao Normal University, Shangrao 334001, China
| | - Li-Xia Quan
- College of Chemistry and Environment Science, Shangrao Normal University, Shangrao 334001, China
| | - Jie-Ping Wan
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Shang-Dong Yang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
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7
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Liu YC, Chen P, Li XJ, Xiong BQ, Liu Y, Tang KW, Huang PF. Visible-Light-Induced Dual Acylation of Alkenes for the Construction of 3-Substituted Chroman-4-ones. J Org Chem 2022; 87:4263-4272. [PMID: 35234478 DOI: 10.1021/acs.joc.1c03100] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Heterocyclic compounds, especially oxygen-containing heterocyclic compounds, are crucial moieties in bioactive compounds and drug leads. Substituted chroman-4-ones are a kind of the most significant structural skeletons. Herein, we report a visible-light-induced dual acylation of alkenes for constructing 3-substituted chroman-4-ones, which undergoes a radical tandem cyclization reaction through carbon-carbon bond cleavage of oxime esters by a nitrogen-centered radical strategy. A series of 3-substituted chroman-4-ones were prepared with up to 86% yield.
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Affiliation(s)
- Yi-Chen Liu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Pu Chen
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Xue-Jiao Li
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Bi-Quan Xiong
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Yu Liu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Ke-Wen Tang
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Peng-Fei Huang
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
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8
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Wang L, Jiang M, Shi MQ. Copper-catalyzed synthesis of CN-containing chroman-4-ones via intramolecular radical cascade acyl-cyanation reaction. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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9
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Sharma S, Sarma B, Baishya G. Direct synthesis of 4-hydroxycoumarins and 4-hydroxy-6-methyl-2-pyrone containing chroman-4-ones via a silver catalyzed radical cascade cyclization reaction. NEW J CHEM 2021. [DOI: 10.1039/d1nj03437e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A novel AgNO3/K2S2O8 catalyzed radical cascade cyclization reaction of 2-(allyloxy)arylaldehydes with 4-hydroxycoumarins and 4-hydroxy-6-methyl-2-pyrone produces two new series of chroman-2-ones.
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Affiliation(s)
- Suraj Sharma
- Chemical Science & Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India
| | - Bipul Sarma
- Department of Chemical Sciences, Tezpur University, Tezpur, 784028, India
| | - Gakul Baishya
- Chemical Science & Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India
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10
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Kiran, Rani P, Chahal S, Sindhu J, Kumar S, Varma RS, Singh R. Transition metal-free C-3 functionalization of quinoxalin-2(1 H)-ones: recent advances and sanguine future. NEW J CHEM 2021. [DOI: 10.1039/d1nj03445f] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A gradual shift from metal-catalyzed to metal-free methods is occurring, as the latter are more environmentally benign. This review discusses sustainable protocols for the construction of C–C, C–N, C–P, C–S, and C–O bonds via C–H functionalization of quinoxalin-2(1H)-ones.
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Affiliation(s)
- Kiran
- Department of Chemistry, COBS&H, CCSHAU, Hisar, 125004, India
| | - Payal Rani
- Department of Chemistry, COBS&H, CCSHAU, Hisar, 125004, India
| | - Sandhya Chahal
- Department of Chemistry, COBS&H, CCSHAU, Hisar, 125004, India
| | - Jayant Sindhu
- Department of Chemistry, COBS&H, CCSHAU, Hisar, 125004, India
| | - Sudhir Kumar
- Department of Chemistry, COBS&H, CCSHAU, Hisar, 125004, India
| | - Rajender S. Varma
- Regional Centre of Advanced Technologies and Materials, Palacký University in Olomouc, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Rajvir Singh
- Department of Chemistry, COBS&H, CCSHAU, Hisar, 125004, India
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11
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Li Y, Wang Z, Xu S, Cheng J. Rhodium-catalyzed C–H activation/annulation of salicylaldehyde with 4-diazoisochroman-3-imines toward 5H,12H-isochromeno[3,4–b]chromen-12-one. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152387] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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12
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Chen DM, Sun YY, Han QQ, Wang ZL. Hypervalent iodine mediated radical cyclization of o-(allyloxy)arylaldehydes and N-hydroxyphthalimide (NHPI) under metal-free conditions. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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13
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Viji M, Vishwanath M, Sim J, Park Y, Jung C, Lee S, Lee H, Lee K, Jung JK. α-Hydroxy acid as an aldehyde surrogate: metal-free synthesis of pyrrolo[1,2- a]quinoxalines, quinazolinones, and other N-heterocycles via decarboxylative oxidative annulation reaction. RSC Adv 2020; 10:37202-37208. [PMID: 35521290 PMCID: PMC9057147 DOI: 10.1039/d0ra07093a] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 10/04/2020] [Indexed: 01/18/2023] Open
Abstract
A metal-free and efficient procedure for the synthesis of pyrrolo[1,2-a]quinoxalines, quinazolinones, and indolo[1,2-a]quinoxaline has been developed. The key features of our method include the in situ generation of aldehyde from α-hydroxy acid in the presence of TBHP (tert-butyl hydrogen peroxide), and further condensation with various amines, followed by intramolecular cyclization and subsequent oxidation to afford the corresponding quinoxalines, quinazolinones derivatives in moderate to high yields.
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Affiliation(s)
- Mayavan Viji
- College of Pharmacy, Medicinal Research Center (MRC), Chungbuk National University Cheongju 28160 Republic of Korea +82-43-268-2732 +82-43-261-2635
| | - Manjunatha Vishwanath
- College of Pharmacy, Medicinal Research Center (MRC), Chungbuk National University Cheongju 28160 Republic of Korea +82-43-268-2732 +82-43-261-2635
| | - Jaeuk Sim
- College of Pharmacy, Medicinal Research Center (MRC), Chungbuk National University Cheongju 28160 Republic of Korea +82-43-268-2732 +82-43-261-2635
| | - Yunjeong Park
- College of Pharmacy, Medicinal Research Center (MRC), Chungbuk National University Cheongju 28160 Republic of Korea +82-43-268-2732 +82-43-261-2635
| | - Chanhyun Jung
- College of Pharmacy, Medicinal Research Center (MRC), Chungbuk National University Cheongju 28160 Republic of Korea +82-43-268-2732 +82-43-261-2635
| | - Seohu Lee
- College of Pharmacy, Medicinal Research Center (MRC), Chungbuk National University Cheongju 28160 Republic of Korea +82-43-268-2732 +82-43-261-2635
| | - Heesoon Lee
- College of Pharmacy, Medicinal Research Center (MRC), Chungbuk National University Cheongju 28160 Republic of Korea +82-43-268-2732 +82-43-261-2635
| | - Kiho Lee
- College of Pharmacy, Korea University Sejong 30019 Republic of Korea
| | - Jae-Kyung Jung
- College of Pharmacy, Medicinal Research Center (MRC), Chungbuk National University Cheongju 28160 Republic of Korea +82-43-268-2732 +82-43-261-2635
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Liu Q, Lu W, Xie G, Wang X. Metal-free synthesis of phosphinoylchroman-4-ones via a radical phosphinoylation-cyclization cascade mediated by K 2S 2O 8. Beilstein J Org Chem 2020; 16:1974-1982. [PMID: 32831954 PMCID: PMC7431760 DOI: 10.3762/bjoc.16.164] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 07/31/2020] [Indexed: 12/17/2022] Open
Abstract
A variety of chroman-4-ones bearing phosphine oxide motifs were conveniently synthesized from readily available diphenylphosphine oxides and alkenyl aldehydes via a metal-free tandem phosphinoylation/cyclization protocol. The reaction utilizes K2S2O8 as oxidant and proceeds in DMSO/H2O at environmentally benign conditions with a broad substrate scope and afforded the title compounds in moderate yields.
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Affiliation(s)
- Qiang Liu
- Dongguan University of Technology, Dongguan 523808, P. R. China
- Department of Applied Chemistry, School of Science, Xi’an Jiaotong University, Xi’an 710049, P. R. China
| | - Weibang Lu
- Dongguan University of Technology, Dongguan 523808, P. R. China
| | - Guanqun Xie
- Dongguan University of Technology, Dongguan 523808, P. R. China
| | - Xiaoxia Wang
- Dongguan University of Technology, Dongguan 523808, P. R. China
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