1
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Wang Y, Wang Y, Wang S, Yu Z, Wang S, Chen W. Electrochemical Trifluoromethylthiolation/Cyclization of N-Arylacrylamides with AgSCF 3: Access to SCF 3-Containing Oxindoles. J Org Chem 2024. [PMID: 39158299 DOI: 10.1021/acs.joc.4c00433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/20/2024]
Abstract
An environmentally friendly electrochemical strategy for the synthesis of SCF3-containing oxindoles was developed. This electrochemical transformation was accomplished through a cascade trifluoromethylthiolation/cyclization of N-acrylamides with AgSCF3, obviating the requirement for external oxidants. A variety of functional groups were well tolerated in this transformation.
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Affiliation(s)
- Yu Wang
- Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power, Shanghai 200090, China
| | - Ye Wang
- Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power, Shanghai 200090, China
| | - Sheng Wang
- Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power, Shanghai 200090, China
| | - Zhou Yu
- Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power, Shanghai 200090, China
| | - Siqi Wang
- Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power, Shanghai 200090, China
| | - Wenbo Chen
- Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power, Shanghai 200090, China
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2
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Zhang SP, Guo DW, Yang ML, Xia YT, Yang WC. EDA Complex-Enabled Annulation to Access CF 2-Containing Tetralones and Quinazolinones Using Persulfates as Electron Donors. J Org Chem 2024; 89:10614-10623. [PMID: 39051432 DOI: 10.1021/acs.joc.4c00845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2024]
Abstract
A photocatalyst-free and EDA complex-enabled radical cascade cyclization reaction of inactive alkenes with bromodifluoroacetamides was reported for the divergent synthesis of fluorine-containing tetralones and quinazolinones. In this transformation, persulfates as electron donors and difluoro bromamide as electron acceptors generate the EDA complex. This is a promising photochemical method with advantages such as mild reaction conditions, simple operation, being metal-free, and excellent functional group tolerance.
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Affiliation(s)
- Shu-Peng Zhang
- Guangling College and School of Plant Protection, Yangzhou University, Yangzhou 225009, P. R. China
| | - Da-Wei Guo
- Guangling College and School of Plant Protection, Yangzhou University, Yangzhou 225009, P. R. China
| | - Mei-Ling Yang
- Guangling College and School of Plant Protection, Yangzhou University, Yangzhou 225009, P. R. China
| | - Yun-Tao Xia
- College of Chemistry & Chemical Engineering, Henan University of Technology, Academician Workstation for Natural Medicinal Chemistry of Henan Province, Zhengzhou 450001, China
| | - Wen-Chao Yang
- Guangling College and School of Plant Protection, Yangzhou University, Yangzhou 225009, P. R. China
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
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3
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Xia D, Shi Y, Jiang L, Li Y, Kong J. Recent advances in the radical cascade reaction for constructing nitrogen heterocycles using azides as radical acceptors. Org Biomol Chem 2024; 22:5511-5523. [PMID: 38904322 DOI: 10.1039/d4ob00732h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2024]
Abstract
Due to the high conversion properties, azide compounds are widely utilized in organic synthesis. For instance, azide compounds readily release nitrogen to form a new N-C bond when they function as radical acceptors for the active intermediates in the reaction. Over the past decade, strategies employing azides as radical acceptors to construct nitrogen heterocycles have been extensively developed. This approach has emerged as a crucial method for synthesizing nitrogen heterocycles. Therefore, this paper provides a review of the research advancements in tandem cyclization reactions using azides as radical acceptors, summarizing the process of reaction design, exploration, reasoning of the mechanism, and prospects for further research of these reactions.
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Affiliation(s)
- Dong Xia
- College of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng, 224005, P. R. China.
| | - Yun Shi
- College of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng, 224005, P. R. China.
| | - Liying Jiang
- College of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng, 224005, P. R. China.
| | - Yang Li
- School of Bioengineering, Huainan Normal University, Huainan, 232038, P. R. China.
| | - Jianfei Kong
- College of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng, 224005, P. R. China.
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4
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Ying J, Zhou T, Liu Y, Zhou L, Wan JP. Transition-Metal-Free C-H Trifluoromethylthiolation of N,N-Disubstituted Enaminones To Access CF 3S-Functionalized Enaminones and Their Application in the Synthesis of CF 3S-Heteroaryls. J Org Chem 2024; 89:9078-9085. [PMID: 38830227 DOI: 10.1021/acs.joc.4c00704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2024]
Abstract
The α-C-H trifluoromethylthiolation of N,N-disubstituted enaminones has been achieved with simple and cheap CF3SO2Na as the CF3S source. The reactions were run at mild temperature (0 °C to rt) using POCl3 as the only reducing reagent. The work represents the first example on the synthesis of α-trifluoromethylthio enaminones via direct C-H functionalization. In addition, the resulting CF3S-functionalized enaminones have been proven as useful building blocks in the synthesis of various CF3S-functionalized heteroaromatic compounds by simple annulation reactions.
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Affiliation(s)
- Jinbiao Ying
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330033, China
| | - Tao Zhou
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330033, China
| | - Yunyun Liu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330033, China
| | - Liyun Zhou
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330033, China
| | - Jie-Ping Wan
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330033, China
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5
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Reddy CR, Prasad AS, Ajaykumar U. A Domino Dearomative ipso-Annulation/Desymmetrization Approach: Stereoselective Access to Tricyclic Alkaloid Skeletons. Org Lett 2024; 26:4904-4909. [PMID: 38836597 DOI: 10.1021/acs.orglett.4c01407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
Herein, we reveal an unprecedented domino annulation of N-benzyl-acrylamides with 1,3-dicarbonyls for the assembly of fused tricyclic alkaloid frameworks incorporating a spirocycle via an alkylation/dearomative ipso-annulation/Michael addition (desymmetrization) sequence. This conversion involves three carbon-carbon bond formations, generating four chiral carbons, including three quaternary carbon centers, in a single diastereomer in one pot under identical reaction conditions. The synthetic potential of this atom-economic method is illustrated by modifications of the functional groups present in the products obtained.
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Affiliation(s)
- Chada Raji Reddy
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Aratikumari Suresh Prasad
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Uprety Ajaykumar
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
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6
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Jaiswal G, Pan SC. BBr 3-mediated dearomative spirocyclization of biaryl ynones: facile access to spiro[5.5]dienones. Org Biomol Chem 2024; 22:3602-3605. [PMID: 38629922 DOI: 10.1039/d4ob00274a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/09/2024]
Abstract
This report covers boron tribromide (BBr3) mediated dearomative spirocyclization of biaryl ynones. The direct synthesis of spiro[5.5]dienones with a tri-substituted double bond is described for the first time in this paper. The scope of the reaction is broad and the spirocyclic products were obtained in moderate to good yields.
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Affiliation(s)
- Gaurav Jaiswal
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, India.
| | - Subhas Chandra Pan
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, India.
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7
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Guo C, Li L, Yan Q, Chen J, Liu ZQ, Li QX, Ni SF, Li Z. Radical Three-Component Nitro Spiro-Cyclization of Unsaturated Sulfonamides/Amides to Access NO 2-Featured 4-Azaspiro[4.5]decanes. Org Lett 2024; 26:3069-3074. [PMID: 38557118 DOI: 10.1021/acs.orglett.4c00651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Free radical three-component nitration/spirocyclization of unsaturated sulfonamides/amides with tert-butyl nitrite was developed for the construction of diverse NO2-revised 4-azaspiro[4.5]decanes. This tandem system featured metal-free participation, simple operation, good selectivity/yields, and a green/low-cost O source. Meanwhile, one nitro-containing complex molecule and a scaled-up operation were performed well to test the synthetic potential of the cascade reaction. Isotopic labeling, radical inhibition experiments, and DFT analysis were carried out to gain insight into the reaction process.
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Affiliation(s)
- Changyou Guo
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, State Key Laboratory of New Pharmaceutical Preparations and Excipients, College of Chemistry and Materials Science, Key Laboratory of Chemical Biology of Hebei Province (22567635H), Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Hebei University, Baoding, Hebei 071002, P. R. China
| | - Lijun Li
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, State Key Laboratory of New Pharmaceutical Preparations and Excipients, College of Chemistry and Materials Science, Key Laboratory of Chemical Biology of Hebei Province (22567635H), Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Hebei University, Baoding, Hebei 071002, P. R. China
| | - Qinqin Yan
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, State Key Laboratory of New Pharmaceutical Preparations and Excipients, College of Chemistry and Materials Science, Key Laboratory of Chemical Biology of Hebei Province (22567635H), Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Hebei University, Baoding, Hebei 071002, P. R. China
| | - Jingyi Chen
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, State Key Laboratory of New Pharmaceutical Preparations and Excipients, College of Chemistry and Materials Science, Key Laboratory of Chemical Biology of Hebei Province (22567635H), Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Hebei University, Baoding, Hebei 071002, P. R. China
| | - Zhong-Quan Liu
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, P. R. China
| | - Quan-Xin Li
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong 515063, P. R. China
| | - Shao-Fei Ni
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong 515063, P. R. China
| | - Zejiang Li
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, State Key Laboratory of New Pharmaceutical Preparations and Excipients, College of Chemistry and Materials Science, Key Laboratory of Chemical Biology of Hebei Province (22567635H), Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Hebei University, Baoding, Hebei 071002, P. R. China
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8
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Wang W, Yu L. Synthesis of Indenones via Persulfate Promoted Radical Alkylation/Cyclization of Biaryl Ynones with 1,4-Dihydropyridines. Molecules 2024; 29:458. [PMID: 38257370 PMCID: PMC10818456 DOI: 10.3390/molecules29020458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2023] [Revised: 01/13/2024] [Accepted: 01/15/2024] [Indexed: 01/24/2024] Open
Abstract
The oxidative radical cascade cyclization of alkynes has emerged as a versatile strategy for the efficient construction of diverse structural units and complex molecules in organic chemistry. This work reports an alkyl radical initiated 5-exo-trig cyclization of biaryl ynones with 1,4-dihydropyridines to selectively synthesize indenones.
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Affiliation(s)
- Wanwan Wang
- Jiangsu Key Laboratory of Chiral Pharmaceuticals Biosynthesis, Taizhou University, Taizhou 225300, China;
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9
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Zhou W, Li ZQ, Cheng C, Lu L, Yang R, Song XR, Luo MJ, Xiao Q. Electrochemical Arene Radical Cation Promoted Spirocyclization of Biaryl Ynones: Access to Alkoxylated Spiro[5,5]trienones. Org Lett 2023; 25:9158-9163. [PMID: 38101415 DOI: 10.1021/acs.orglett.3c03678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2023]
Abstract
Herein, a novel electrochemical arene radical cation promoted dearomative spirocyclization of biaryl ynones with alcohols is described, providing a conceptually novel transformation mode for producing diverse alkoxylated spiro[5,5]trienones. The catalyst- and chemical-oxidant-free spirocyclization protocol features broad substrate scope and high functional group tolerance. Mechanistic studies reveal that the generation of arene radical cation via anodic single-electron oxidation is crucial, with sequential 6-endo-dig cyclization, dissociation of hemiketal, anodic oxidation, and nucleophilic attack of alcohols.
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Affiliation(s)
- Wei Zhou
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Zi-Qiong Li
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Chaozhihui Cheng
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Lin Lu
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Ruchun Yang
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Xian-Rong Song
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Mu-Jia Luo
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Qiang Xiao
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
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10
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Yan Q, Chen S, Fan J, Li Z. Recent advances in radical thiocyanation cyclization or spirocyclization reactions. Org Biomol Chem 2023; 21:9112-9122. [PMID: 37986647 DOI: 10.1039/d3ob01659e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
Organic thiocyanates are valuable biological moities and drug-building blocks. They can also transform effectively into thioethers, thiols, alkynyl thioethers, and thiocarbamates in synthetic chemistry. With respect to the merits of thiocyanates, many chemists and our research team have developed diverse strategies to access SCN-revised heterocycles/spirocycles via an effective radical cyclization process. Hence, this review article first describes the importance/application of thiocyanates. Subsequently, it summarizes the reaction conditions, substrate scopes, and plausible mechanism, respectively, of the excellent work stated above.
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Affiliation(s)
- Qinqin Yan
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, State Key Laboratory of New Pharmaceutical Preparations and Excipients, College of Chemistry and Materials Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, Hebei, 071002, P. R. China.
| | - Shiliu Chen
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, State Key Laboratory of New Pharmaceutical Preparations and Excipients, College of Chemistry and Materials Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, Hebei, 071002, P. R. China.
| | - Jie Fan
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, State Key Laboratory of New Pharmaceutical Preparations and Excipients, College of Chemistry and Materials Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, Hebei, 071002, P. R. China.
| | - Zejiang Li
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, State Key Laboratory of New Pharmaceutical Preparations and Excipients, College of Chemistry and Materials Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, Hebei, 071002, P. R. China.
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11
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Nagar R, Suwalka D, Malviya BK, Verma VP, Jassal AK, Sharma S. Electrochemical Post-Ugi Cyclization for the Synthesis of Highly Functionalized Spirolactams. J Org Chem 2023; 88:13977-13994. [PMID: 37695028 DOI: 10.1021/acs.joc.3c01532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
The combination of the Ugi reaction and electro-organic synthesis can aid in the creation of novel heterocycles that have not been previously explored. In this study, a new strategy utilizing bis-amides from the Ugi reaction has been developed, which can produce C-S, C-Se, and C-C═O functionalized five-membered spirolactams mediated by electricity under catalyst- and metal-free conditions. Notably, this approach can be applied using a microelectro-flow reactor (μ-EFR) for gram-scale synthesis. The described strategy can synthesize complex azaspiro-fused tricyclic scaffolds with high diastereo- and regioselectivity, highlighting its versatility and potential.
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Affiliation(s)
- Riya Nagar
- Department of Chemistry, Mohanlal Sukhadia University, Udaipur 313001, India
| | - Dinesh Suwalka
- Department of Chemistry, Mohanlal Sukhadia University, Udaipur 313001, India
| | | | - Ved Prakash Verma
- Department of Chemistry, Banasthali University, Niwai-Jodhpuriya Road, Vanasthali 304022, India
| | - Amanpreet Kaur Jassal
- Department of Chemistry, U.G.C. Centre of Advance Studies in Chemistry, Guru Nanak Dev University, Amritsar 143005, India
| | - Siddharth Sharma
- Department of Chemistry, Mohanlal Sukhadia University, Udaipur 313001, India
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12
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Sun Y, Zhang SP, Yang WC. Divergent Construction of Thiochromanes and N-Arylbutanamides via Arylthiodifluoromethyl Radical-Triggered Cascade of Alkenes. J Org Chem 2023; 88:13279-13290. [PMID: 37650696 DOI: 10.1021/acs.joc.3c01576] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
A strategy utilizing silver-catalyzed oxidative decarboxylation radical cascade cyclization of arylthiodifluoroacetic acids with alkenes for the simple and efficient preparation of difluoromethylated thiochromanes and 2,2-disubstituted-N-arylbutanamides derivatives has been developed. This approach includes good functional group tolerance, easily accessible starting materials, and operational simplicity.
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Affiliation(s)
- Yu Sun
- Guangling College and School of Plant Protection, Yangzhou University, Yangzhou 225009, P. R. China
| | - Shu-Peng Zhang
- Guangling College and School of Plant Protection, Yangzhou University, Yangzhou 225009, P. R. China
- National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass, Nanjing Forestry University, Nanjing 210037, China
| | - Wen-Chao Yang
- Guangling College and School of Plant Protection, Yangzhou University, Yangzhou 225009, P. R. China
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13
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Verma N, Tyagi R, Khanna A, Malviya M, Sagar R. Electro-organic synthesis of isatins and hydrazones through C-N cross-coupling and C(sp 2)-H/C(sp 3)-H functionalization. Org Biomol Chem 2023; 21:6707-6714. [PMID: 37563999 DOI: 10.1039/d3ob01128c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/12/2023]
Abstract
An efficient and unique approach to synthesize isatin (indole-2,3-dione) from 2-aminoacetophenone under electrochemical conditions supported by I2-DMSO through C-N cross-coupling and C(sp2)-H/C(sp3)-H functionalization is presented. This synthetic method spans a wide range of substituted 2-aminoacetophenone substrates. The use of iodine as a promoter and shorter reaction times produced good to very good yields of isatin derivatives, which is a significant improvement over the reaction in a batch process. Further, hydrazones of isatin were synthesized by using hydrazine hydrate which produces electrochemically active molecules, namely isatin-hydrazones. The hydrazones of acetophenone were also obtained using the same reaction protocol. Additionally, the effect of increasing scan rate studied using cyclic voltammetry shows that the process followed a diffusion-controlled mechanism.
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Affiliation(s)
- Neetu Verma
- Department of Chemistry, IIT (Banaras Hindu University), Varanasi-221005, India.
| | - Rajdeep Tyagi
- Glycochemistry Laboratory, School of Physical Sciences, Jawaharlal Nehru University, New Delhi-110067, India.
| | - Ashish Khanna
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
| | - Manisha Malviya
- Department of Chemistry, IIT (Banaras Hindu University), Varanasi-221005, India.
| | - Ram Sagar
- Glycochemistry Laboratory, School of Physical Sciences, Jawaharlal Nehru University, New Delhi-110067, India.
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
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14
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Lei ZL, Liu TC, Cui FH, Pan YM, Li SH, Tang HT. Electrochemical Promoted Three-Component Trifluoromethylation/Spirocyclization Reaction of N-Arylsulfonylacrylamides to 4-Azaspiro[4.5]decanes. Org Lett 2023; 25:6001-6005. [PMID: 37548921 DOI: 10.1021/acs.orglett.3c02143] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
An electrochemical facilitated three-component trifluoromethylation/spirocyclization reaction of N-(arylsulfonyl)acrylamides, CF3SO2Na, and H2O has been developed. Without the requirement of chemical oxidants, a number of unexplored trifluoromethylated 4-azaspiro[4.5]decanes were obtained in satisfactory yields under mild conditions. This work provides a new synthetic strategy for fluorine-containing spirocyclic compounds and shows a new perspective for the reactivity study of N-(arylsulfonyl)acrylamides.
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Affiliation(s)
- Zhi-Long Lei
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin 541004, People's Republic of China
| | - Tai-Chen Liu
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin 541004, People's Republic of China
| | - Fei-Hu Cui
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin 541004, People's Republic of China
| | - Ying-Ming Pan
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin 541004, People's Republic of China
| | - Shu-Hui Li
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin 541004, People's Republic of China
| | - Hai-Tao Tang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin 541004, People's Republic of China
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15
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Reddy CR, Ajaykumar U, Patil AD, Ramesh R. ipso-Cyclization of unactivated biaryl ynones leading to thio-functionalized spirocyclic enones. Org Biomol Chem 2023; 21:6379-6388. [PMID: 37492954 DOI: 10.1039/d3ob00974b] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2023]
Abstract
Ceric ammonium nitrate (CAN)-promoted oxidative ipso-cyclization of unactivated biaryl ynones with S-centered radicals (SCN/SCF3) to access spiro[5,5]trienones has been established. This approach displayed excellent regioselectivity towards spirocyclization and tolerated a variety of functional groups. Dearomatization of hitherto unknown aryl/heteroaryl groups is also disclosed. DMSO is employed as a low-toxicity, inexpensive solvent as well as a source of oxygen.
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Affiliation(s)
- Chada Raji Reddy
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad - 500007, India.
| | - Uprety Ajaykumar
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad - 500007, India.
| | - Amol D Patil
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad - 500007, India.
| | - Remya Ramesh
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad - 500007, India.
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16
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Roy B, Kuila P, Sarkar D. Visible Light Promoted Brominative Dearomatization of Biaryl Ynones to Spirocycles. J Org Chem 2023; 88:10925-10945. [PMID: 37459885 DOI: 10.1021/acs.joc.3c00941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
Bromine induced spiro cyclization of biaryl ynones facilitated the synthesis of spiro[5,5]trienones suitable for extended functionality at the C(3') position. Herein, a step-economic photo-oxidative brominative carbannulation of biaryl ynones employing ammonium bromide and riboflavin tetraacetate (RFTA) has been developed. The reactivity between distal phenyl C-H activated ortho-annulation and dearomative ipso-annulation is well exemplified. The eminent features of the methodology include metal-free, external additive free, low-loading photocatalyst (0.1 mol %), and use of a simple precursor.
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Affiliation(s)
- Barnali Roy
- Department of Chemistry, National Institute of Technology, Rourkela, Odisha 769008, India
| | - Puspendu Kuila
- Department of Chemistry, National Institute of Technology, Rourkela, Odisha 769008, India
| | - Debayan Sarkar
- Organic Synthesis and Molecular Engineering Laboratory, Department of Chemistry, Indian Institute of Technology Indore, Indore, Madhya Pradesh 453552, India
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17
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Dong H, Chen C, Zhao J, Ji Y, Yang W. Photoinduced Photocatalyst-Free Cascade Cyclization of Alkynes with Sodium Sulfinates for the Synthesis of Benzothiophenes and Thioflavones. Molecules 2023; 28:molecules28114436. [PMID: 37298913 DOI: 10.3390/molecules28114436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 05/19/2023] [Accepted: 05/26/2023] [Indexed: 06/12/2023] Open
Abstract
The subject of this investigation is a new method for the construction of sulfonylated heterocycles which overcomes the limitations of classical approaches using a cheap feedstock sulfonylating agent, especially under photocatalyst- and metal-free conditions.
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Affiliation(s)
- Hongqiang Dong
- The Open Research Fund of the National and Local Joint Engineering Laboratory of High Efficiency and Superior-Quality Cultivation and Fruit Deep Processing Technology of Characteristic Fruit Trees in South Xinjiang, College of Agriculture, Tarim University, Alaer 843300, China
| | - Chunli Chen
- The Open Research Fund of the National and Local Joint Engineering Laboratory of High Efficiency and Superior-Quality Cultivation and Fruit Deep Processing Technology of Characteristic Fruit Trees in South Xinjiang, College of Agriculture, Tarim University, Alaer 843300, China
| | - Jinlei Zhao
- National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass, Nanjing Forestry University, Nanjing 210037, China
- Jiangsu Surveying and Design Institute of Water Resources Co., Ltd., Yangzhou 225127, China
| | - Yigang Ji
- Jiangsu Key Laboratory of Biofuctional Molecules, Department of Life Sciences and Chemistry, Jiangsu Second Normal University, Nanjing 210013, China
| | - Wenchao Yang
- Guangling College and School of Plant Protection, Yangzhou University, Yangzhou 225009, China
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18
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Wan J, Huang J. Electrochemical Dearomative Amination of Phenol Derivatives: Access to Spirooxazolidinones. Adv Synth Catal 2023. [DOI: 10.1002/adsc.202300118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Affiliation(s)
- Jin‐Lin Wan
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou Guangdong 510640 People's Republic of China
| | - Jing‐Mei Huang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou Guangdong 510640 People's Republic of China
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19
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Li Y, Li L, Guo C, Yan Q, Zhou H, Wang Y, Liu ZQ, Li Z. Nitro-Spirocyclization of Biaryl Ynones with tert-Butyl Nitrite: Access to NO 2-Substituted Spiro[5,5]trienones. J Org Chem 2023; 88:4854-4862. [PMID: 36947717 DOI: 10.1021/acs.joc.3c00087] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/24/2023]
Abstract
A metal/peroxide-free involved simple cascade 6-exo-trig spirocyclization of tert-butyl nitrite with biaryl ynones has been finished, which resulted in various NO2-modified spiro[5,5]trienones with good regioselectivity/yields. A variety of scaled-up experiments, reduction/epoxidation operations, and mechanistic studies were performed to verify the merits and spirocyclization process of this radical system. Finally, the structure of the spirocycles was confirmed by single-crystal X-ray diffraction.
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Affiliation(s)
- Yang Li
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, College of Chemistry and Materials Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, Hebei 071002, PR China
| | - Lijun Li
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, College of Chemistry and Materials Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, Hebei 071002, PR China
| | - Changyou Guo
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, College of Chemistry and Materials Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, Hebei 071002, PR China
| | - Qinqin Yan
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, College of Chemistry and Materials Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, Hebei 071002, PR China
| | - Hongxun Zhou
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, College of Chemistry and Materials Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, Hebei 071002, PR China
| | - Ying Wang
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, College of Chemistry and Materials Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, Hebei 071002, PR China
| | - Zhong-Quan Liu
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, PR China
| | - Zejiang Li
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, College of Chemistry and Materials Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, Hebei 071002, PR China
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20
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Hu Z, Wu J, Wu J, Wu F. Research Progress on Direct Trifluoromethylselenylation. CHINESE J ORG CHEM 2023. [DOI: 10.6023/cjoc202206050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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21
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Photoinduced cyclization of aryl ynones with 4-alkyl-DHPs for the divergent synthesis of indenones, thioflavones and spiro[5.5]trienones. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2022.112819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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22
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Zhang Y, Cai Z, Warratz S, Ma C, Ackermann L. Recent advances in electrooxidative radical transformations of alkynes. Sci China Chem 2022. [DOI: 10.1007/s11426-022-1438-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
AbstractDuring the past few years, electrochemical oxidative reactions through radical intermediates have emerged as an environmentally-benign, powerful platform for the facile formation of C–E (E = C, N, S, Se, O and Hal) bonds through single-electron-transfer (SET) processes at the electrodes. Functionalized unsaturated molecules and unusual structural motifs can, for instance, be directly constructed under exceedingly mild reaction conditions through initial radical attack onto alkynes. This minireview highlights the recent advances in electrooxidation in radical reactions until June 2022, with a particular focus on radical additions onto alkynes.
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23
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Wang J, Lu XX, Yang RP, Xiang ZH, Zhang BB, Chao S, Liu L, Yan Y, Shang X. Synthesis of Spiro[5.5]trienones- and Spiro[4.5]trienones-Fused Selenocyanates via Electrophilic Selenocyanogen Cyclization and Dearomative Spirocyclization. J Org Chem 2022; 87:13089-13101. [PMID: 36170059 DOI: 10.1021/acs.joc.2c01594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A practical strategy for the synthesis of spiro[5.5]trienones-fused selenocyanates and spiro[4.5]trienones-fused selenocyanates through electrophilic selenocyanogen cyclization and dearomative spirocyclization is reported. This approach was conducted under mild conditions with broad substrate scope and good functional group tolerance. The utility of this procedure is exhibited in the late-stage functionalization of nature product and drug molecules.
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Affiliation(s)
- Jia Wang
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan 453003, China
| | - Xiao-Xiao Lu
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan 453003, China
| | - Run-Ping Yang
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan 453003, China
| | - Zhi-Hao Xiang
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan 453003, China
| | - Bing-Bing Zhang
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan 453003, China
| | - Shujun Chao
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan 453003, China
| | - Lixia Liu
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan 453003, China
| | - Yunhui Yan
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan 453003, China
| | - Xuefang Shang
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan 453003, China
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24
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Raji Reddy C, Kolgave DH, Ajaykumar U, Ramesh R. Copper(II)-catalyzed oxidative ipso-annulation of N-arylpropiolamides and biaryl ynones with 1,3-diketones: construction of diketoalkyl spiro-trienones. Org Biomol Chem 2022; 20:6879-6889. [PMID: 35972321 DOI: 10.1039/d2ob01282k] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An unprecedented copper-catalyzed ipso-annulation reaction of N-(p-methoxyaryl)propiolamides with 1,3-diketones has been developed, which enables the assembly of diketoalkylated spiro[4.5]trienones involving oxidative dearomatization in the presence of ammonium persulfate [(NH4)2S2O8] as the oxidant. This protocol was extended to biaryl ynones, efficiently affording the diketoalkylated spiro[5.5]trienones in good yields. The significance of the diketoalkyl functionality has been illustrated by further transformation into 3-pyrazoyl spiro-trienone, a structurally unique motif.
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Affiliation(s)
- Chada Raji Reddy
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad - 500007, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Dattahari H Kolgave
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad - 500007, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Uprety Ajaykumar
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad - 500007, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Remya Ramesh
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad - 500007, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
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25
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Chen X, Pei C, Liu B, Li J, Zou D, Wu Y, Wu Y. Copper-assisted trifluoromethylthiolation/radical cascade cyclization of alkynes to construct SCF 3-containing dioxodibenzothiazepines. Chem Commun (Camb) 2022; 58:8674-8677. [PMID: 35822922 DOI: 10.1039/d2cc02171d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A mild and efficient Cu-assisted trifluoromethylthiolation/radical cascade cyclization of alkynes with readily available and stable AgSCF3 as the trifluoromethylthiolating reagent has been disclosed. This transformation provides an opportunity to construct a series of potential medicinally valuable trifluoromethylthio-substituted dioxodibenzothiazepines with wide functional group compatibility. This protocol opens up a new avenue for the construction of useful trifluoromethylthiolated seven-membered N-heterocycles.
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Affiliation(s)
- Xiaoyu Chen
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China.
| | - Congcong Pei
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China.
| | - Bo Liu
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China.
| | - Jingya Li
- Tetranov Biopharm, LLC., Zhengzhou, 450052, People's Republic of China
| | - Dapeng Zou
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China.
| | - Yangjie Wu
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China.
| | - Yusheng Wu
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China. .,Tetranov International, Inc., 100 Jersey Avenue, Suite A340, New Brunswick, NJ, 08901, USA.
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26
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Ren Y, Yan Q, Li Y, Gao Y, Zhao J, Li L, Liu ZQ, Li Z. Free Radical Promoted Trifluoromethylthiolation of Alkynes to Access SCF 3-Containing Dibenzazepines or Dioxodibenzothiazepines. J Org Chem 2022; 87:8773-8781. [PMID: 35709505 DOI: 10.1021/acs.joc.2c00623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Persulfate-promoted radical cascade trifluoromethylthiolation of aryl acetylenes with AgSCF3 provides a simple reaction system for the synthesis of SCF3-substituted dibenzazepines or dioxodibenzothiazepines with good Z/E selectivity. The single-crystal X-ray diffraction data confirms the structures of the final products. A series of scaled-up experiments, further transformations, and radical inhibition experiments were operated in the reaction system.
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Affiliation(s)
- Yingming Ren
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, College of Chemistry & Environmental Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, Hebei 071002, People's Republic of China
| | - Qinqin Yan
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, College of Chemistry & Environmental Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, Hebei 071002, People's Republic of China
| | - Yang Li
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, College of Chemistry & Environmental Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, Hebei 071002, People's Republic of China
| | - Yongjun Gao
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, College of Chemistry & Environmental Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, Hebei 071002, People's Republic of China
| | - Jincan Zhao
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, College of Chemistry & Environmental Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, Hebei 071002, People's Republic of China
| | - Lijun Li
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, College of Chemistry & Environmental Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, Hebei 071002, People's Republic of China
| | - Zhong-Quan Liu
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, People's Republic of China
| | - Zejiang Li
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, College of Chemistry & Environmental Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, Hebei 071002, People's Republic of China
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27
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Li L, Hou ZW, Li P, Wang L. Electrochemical Dearomatizing Spirocyclization of Alkynes with Dimethyl 2-Benzylmalonate s to Spiro[4.5]deca-trienones. J Org Chem 2022; 87:8697-8708. [PMID: 35679486 DOI: 10.1021/acs.joc.2c00939] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
An electrochemical dearomatizing spirocyclization of alkynes with dimethyl 2-benzylmalonates for the preparation of spiro[4.5]deca-trienones has been developed. This approach adopts ferrocene (Cp2Fe) as an electrocatalyst to produce carbon-centered radical intermediates from C-H-based malonates, which obviates the forthputting of noble-metal reagents, sacrificial chemical oxidants and 2-bromomalonates. A wide variety of spiro compounds are efficiently prepared with satisfactory results under mild conditions.
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Affiliation(s)
- Laiqiang Li
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, Zhejiang 318000, P. R. China.,Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Zhong-Wei Hou
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, Zhejiang 318000, P. R. China
| | - Pinhua Li
- Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
| | - Lei Wang
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, Zhejiang 318000, P. R. China.,Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
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28
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Chen F, Zheng Y, Yang H, Yang Q, Wu L, Zhou N. Iron‐Catalyzed Silylation and Spirocyclization of Biaryl‐Ynones: A Radical Cascade Process toward Silylated Spiro[5.5]trienones. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200049] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Fei Chen
- Henan Provincial Engineering and Technology Research Center for Precise Synthesis of Fluorine-Containing Drugs Anyang Key Laboratory of New Functional Complex Materials College of Chemistry and Chemical Engineering Anyang Normal University Anyang 455000 People's Republic of China
| | - Yang Zheng
- Henan Provincial Engineering and Technology Research Center for Precise Synthesis of Fluorine-Containing Drugs Anyang Key Laboratory of New Functional Complex Materials College of Chemistry and Chemical Engineering Anyang Normal University Anyang 455000 People's Republic of China
| | - Hao Yang
- Henan Provincial Engineering and Technology Research Center for Precise Synthesis of Fluorine-Containing Drugs Anyang Key Laboratory of New Functional Complex Materials College of Chemistry and Chemical Engineering Anyang Normal University Anyang 455000 People's Republic of China
| | - Qing‐Yun Yang
- Henan Provincial Engineering and Technology Research Center for Precise Synthesis of Fluorine-Containing Drugs Anyang Key Laboratory of New Functional Complex Materials College of Chemistry and Chemical Engineering Anyang Normal University Anyang 455000 People's Republic of China
| | - Lu‐Yan Wu
- Henan Provincial Engineering and Technology Research Center for Precise Synthesis of Fluorine-Containing Drugs Anyang Key Laboratory of New Functional Complex Materials College of Chemistry and Chemical Engineering Anyang Normal University Anyang 455000 People's Republic of China
| | - Nengneng Zhou
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education Anhui Key Laboratory of Molecule-Based Materials College of Chemistry and Materials Science Anhui Normal University Wuhu 241000 People's Republic of China
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29
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Wei W, Scheremetjew A, Ackermann L. Electrooxidative palladium- and enantioselective rhodium-catalyzed [3 + 2] spiroannulations. Chem Sci 2022; 13:2783-2788. [PMID: 35340855 PMCID: PMC8890123 DOI: 10.1039/d1sc07124f] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 02/09/2022] [Indexed: 11/21/2022] Open
Abstract
Despite indisputable progress in the development of electrochemical transformations, electrocatalytic annulations for the synthesis of biologically relevant three-dimensional spirocyclic compounds has as of yet not been accomplished. In sharp contrast, herein, we describe the palladaelectro-catalyzed C-H activation/[3 + 2] spiroannulation of alkynes by 1-aryl-2-naphthols. Likewise, a cationic rhodium(iii) catalyst was shown to enable electrooxidative [3 + 2] spiroannulations via formal C(sp3)-H activations. The versatile spiroannulations featured a broad substrate scope, employing electricity as a green oxidant in lieu of stoichiometric chemical oxidants under mild conditions. An array of spirocyclic enones and diverse spiropyrazolones, bearing all-carbon quaternary stereogenic centers were thereby accessed in a user-friendly undivided cell setup, with molecular hydrogen as the sole byproduct.
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Affiliation(s)
- Wen Wei
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
| | - Alexej Scheremetjew
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
- Wöhler Research Institute for Sustainable Chemistry, Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
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30
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Visible-light-induced novel cyclization of 2-(2-(arylethynyl)benzylidene)-malononitrile derivatives with 2,6-di(tert-butyl)-4-methylphenol to bridged spirocyclic compounds. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.03.084] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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31
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Liang Y, Wang S, Jia H, Chen B, Zhu F, Huo Z. Trifluoromethylthiolative spirocyclization of biaryl ynones without leaving groups on the para-position of dearomatized aryl rings. NEW J CHEM 2022. [DOI: 10.1039/d2nj01056a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A direct and efficient strategy for the oxidative spirocyclization of biaryl ynones has been developed, where nonsubstituted groups were on the para-position of the dearomatized aryl rings.
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Affiliation(s)
- You Liang
- Co-Innovation Center for Modern Production Technology of Grain Crop/Jiangsu Key Laboratory of Crop Genetics and Physiology, Yangzhou University, Yangzhou 225009, P. R. China
- College of Plant Science, Tarim University, Alaer 843300, P. R. China
| | - Sijin Wang
- Co-Innovation Center for Modern Production Technology of Grain Crop/Jiangsu Key Laboratory of Crop Genetics and Physiology, Yangzhou University, Yangzhou 225009, P. R. China
| | - Huijuan Jia
- Co-Innovation Center for Modern Production Technology of Grain Crop/Jiangsu Key Laboratory of Crop Genetics and Physiology, Yangzhou University, Yangzhou 225009, P. R. China
| | - Beibei Chen
- College of Plant Science, Tarim University, Alaer 843300, P. R. China
| | - Feng Zhu
- Plant Protection and Plant Quarantine Station of Jiangsu Province, Nanjing 210014, P. R. China
| | - Zhongyang Huo
- Co-Innovation Center for Modern Production Technology of Grain Crop/Jiangsu Key Laboratory of Crop Genetics and Physiology, Yangzhou University, Yangzhou 225009, P. R. China
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32
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Wang L, Xie L, Fang Z, Zhang Q, Li D. Tandem trifluoromethylthiolation and cyclization of N-aryl-3-butenamides with AgSCF 3: divergent access to CF 3S-substituted 3,4-dihydroquinolin-2-ones and azaspiro[4,5]dienones. Org Chem Front 2022. [DOI: 10.1039/d2qo00207h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A AgSCF3-mediated tandem trifluoromethylthiolaton and cyclization of N-aryl-3-butenamides was developed. It showed divergent reactivities and enabled the selective syntheses of CF3S-substituted 3,4-dihydroquinolin-2-ones and azaspiro[4,5]dienones. The selectivity was achieved through different...
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33
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Shen LY, Sun Y, Wang YQ, Li B, Yang WC, Dai P. K2S2O8-promoted radical trifluoromethylthiolation/spirocyclization for the synthesis of SCF3‑featured spiro[5,5]trienones. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132649] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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34
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Li N, Shi Z, Yuan Y, Li Z, Ye KY. Rapid synthesis of spirodienones via electrochemical dearomative spirocyclization in flow. Org Chem Front 2022. [DOI: 10.1039/d2qo01392d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
An electrochemical dearomative spirocyclization in flow has been developed, featuring the use of electrons as the clean oxidant in a minimum amount of electrolytes to afford diverse spirodienones in a short reaction time.
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Affiliation(s)
- Nan Li
- Institute of Pharmaceutical Science and Technology, College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Zhaojiang Shi
- Institute of Pharmaceutical Science and Technology, College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Yaofeng Yuan
- Institute of Pharmaceutical Science and Technology, College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Zhen Li
- Institute of Molecular Aggregation Science, Tianjin University, Tianjin 300072, China
| | - Ke-Yin Ye
- Institute of Pharmaceutical Science and Technology, College of Chemistry, Fuzhou University, Fuzhou 350108, China
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35
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Li JN, Li ZJ, Shen LY, Li P, Zhang Y, Yang WC. Selective polychloromethylation and halogenation of alkynes with polyhaloalkanes. Org Biomol Chem 2022; 20:6659-6666. [DOI: 10.1039/d2ob01053d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We disclosed a selective polychloromethylation and halogenation reaction of alkynes via a radical addition/spirocyclization cascade sequence, in which applying polyhaloalkanes as the precursor of polyhalomethyl and halogen radical. Across this...
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36
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Xia D, Shen LY, Zhang Y, Yang WC. Radical spirocyclization of biaryl ynones for the construction of NO 2-containing spiro[5.5]trienones. NEW J CHEM 2022. [DOI: 10.1039/d2nj03670c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
An efficient 6-exo-trig radical cascade reaction of biaryl ynones with NaNO2 was developed to afford nitro-functionalized spiro[5.5]trienones with yields of up to 88%.
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Affiliation(s)
- Dong Xia
- College of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng, 224005, P. R. China
| | - Liu-Yu Shen
- Guangling College and School of Plant Protection, Yangzhou University, Yangzhou, 225009, P. R. China
| | - Yicheng Zhang
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui, 235000, P. R. China
| | - Wen-Chao Yang
- Guangling College and School of Plant Protection, Yangzhou University, Yangzhou, 225009, P. R. China
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37
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Wang Z, Sun Y, Shen LY, Yang WC, Meng F, Li P. Photochemical and electrochemical strategies in C–F bond activation and functionalization. Org Chem Front 2022. [DOI: 10.1039/d1qo01512e] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The recent advances in photochemical or electrochemical C–F bond activation and functionalization have been summarized and discussed.
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Affiliation(s)
- Zhanghong Wang
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang 550025, PR China
| | - Yu Sun
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, P. R. China
| | - Liu-Yu Shen
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, P. R. China
| | - Wen-Chao Yang
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, P. R. China
| | - Fei Meng
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, P. R. China
| | - Pinhua Li
- Anhui Laboratory of Clean Catalytic Engineering, Anhui Laboratory of Functional Complexes for Materials Chemistry and Application, College of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, P. R. of China
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38
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Chen Z, Zheng X, Zhou SF, Cui X. Visible Light-Promoted Selenylative Spirocyclization of Biaryl Ynones toward the Formation of Selenated Spiro[5.5]trienones. Org Biomol Chem 2022; 20:5779-5783. [DOI: 10.1039/d2ob01006b] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A visible-light induced dearomative cascade cyclization of biaryl ynones with diselenides under photocatalyst and external additive-free conditions has been explored, giving a series of selenated spiro[5.5]trienones in moderate to good...
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39
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Shi Y, Xiao T, Xia D, Yang W. SCF 3 Radical Initiated Cascade Reaction of Unsaturated Hydrocarbon. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202203041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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40
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He FS, Su L, Yu F, Tang Z, Wu J. Construction of sulfonated spiro[5,5]trienones from sulfur dioxide via iron-catalyzed dearomative spirocyclization of biaryls. Org Chem Front 2022. [DOI: 10.1039/d2qo00120a] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An iron-catalyzed dearomative spirocyclization of biaryl ynones with sodium metabisulfite and cycloketone oxime esters is developed. By using sodium metabisulfite as the source of sulfur dioxide, this approach enables the...
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41
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Wang W, Zhang M, Yang W, Yang X. Research Progress in Radical Cascade Reaction Using Nitrogen Heterocycle in Indoles as Radical Acceptors. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202107012] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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42
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Zhao Y, Wang X, Yao R, Li C, Xu Z, Zhang L, Han G, Hou J, Liu Y, Song Y. Iron‐Catalyzed Alkene Trifluoromethylation in Tandem with Phenol Dearomatizing Spirocyclization: Regioselective Construction of Trifluoromethylated Spirocarbocycles. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Yilin Zhao
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics School of Pharmacy The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics School of Basic Medical Sciences Tianjin Medical University Tianjin 300070 People's Republic of China
| | - Xue Wang
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics School of Pharmacy The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics School of Basic Medical Sciences Tianjin Medical University Tianjin 300070 People's Republic of China
| | - Ru Yao
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics School of Pharmacy The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics School of Basic Medical Sciences Tianjin Medical University Tianjin 300070 People's Republic of China
| | - Chengwen Li
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics School of Pharmacy The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics School of Basic Medical Sciences Tianjin Medical University Tianjin 300070 People's Republic of China
| | - Zelin Xu
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics School of Pharmacy The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics School of Basic Medical Sciences Tianjin Medical University Tianjin 300070 People's Republic of China
| | - Liming Zhang
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics School of Pharmacy The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics School of Basic Medical Sciences Tianjin Medical University Tianjin 300070 People's Republic of China
| | - Guifang Han
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics School of Pharmacy The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics School of Basic Medical Sciences Tianjin Medical University Tianjin 300070 People's Republic of China
| | - Jingli Hou
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics School of Pharmacy The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics School of Basic Medical Sciences Tianjin Medical University Tianjin 300070 People's Republic of China
| | - Yangping Liu
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics School of Pharmacy The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics School of Basic Medical Sciences Tianjin Medical University Tianjin 300070 People's Republic of China
| | - Yuguang Song
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics School of Pharmacy The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics School of Basic Medical Sciences Tianjin Medical University Tianjin 300070 People's Republic of China
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Wang X, Zhang Y, Sun K, Meng J, Zhang B. Study on the Application of Photoelectric Technology in the Synthesis of Selenium-Containing Heterocycles. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202109046] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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