1
|
Patel S, Chakraborty A, Chatterjee I. C(sp 3)-C(sp 3) Radical-Cross-Coupling Reaction via Photoexcitation. Org Lett 2023; 25:8246-8251. [PMID: 37947520 DOI: 10.1021/acs.orglett.3c03276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
The photoexcitation of 4-alkyl-1,4-dihydropyridines (alkyl-DHPs) in the presence of a base triggers the single-electron-transfer-mediated desulfonative radical-cross-coupling (RCC) reaction without the need for any metal or photocatalyst. 4-Alkyl-substituted 1,4-DHPs as the electron donor (reductant) and alkyl sulfones as the electron acceptor (oxidant) are chosen strategically as the two best-matched modular radical precursors for the construction of C(sp3)-C(sp3) bonds. Ultraviolet light-emitting diodes (365 nm) have proven to be adequate for inducing single-electron transfer between two radical precursors in the excited state. Following this designed strategy, a diverse collection of primary, secondary, and tertiary persistent alkyl radicals from both radical precursors have been used to forge C(sp3)-C(sp3) bonds. This blueprint features good functional group compatibility, a broad scope, and detailed mechanistic investigation.
Collapse
Affiliation(s)
- Sandeep Patel
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab 140001, India
| | - Arijit Chakraborty
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab 140001, India
| | - Indranil Chatterjee
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab 140001, India
| |
Collapse
|
2
|
Sengoku T, Iwama H, Shimotori T, Fujimoto K, Inuzuka T, Matsune K, Yoda H. Visible-Light-Induced Reductive Coupling of Arylacetylenes with Benzothiazole Sulfones. J Org Chem 2023; 88:12776-12782. [PMID: 37614008 DOI: 10.1021/acs.joc.3c01554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Abstract
In this study, we propose heavy-metal-free reductive coupling of arylacetylenes with benzothiazole sulfones. The reactions of alkyl or benzylic benzothiazole sulfones with arylacetylenes are successfully performed in the presence of Hantzsch esters and K2CO3 under visible-light irradiation to afford 1,2-disubstituted alkenes in moderate to good yields, with Z-isomer as the major product. The utility of this protocol is expanded to α-deuterative coupling using a deuterated Hantzsch ester, furnishing the corresponding alkenes with high deuterium incorporation.
Collapse
Affiliation(s)
- Tetsuya Sengoku
- Department of Applied Chemistry, Faculty of Engineering, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu 432-8561, Japan
| | - Haruka Iwama
- Department of Applied Chemistry, Faculty of Engineering, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu 432-8561, Japan
| | - Takuma Shimotori
- Department of Applied Chemistry, Faculty of Engineering, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu 432-8561, Japan
| | - Keisuke Fujimoto
- Department of Applied Chemistry, Faculty of Engineering, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu 432-8561, Japan
| | - Toshiyasu Inuzuka
- Division of Instrumental Analysis, Life Science Research Center, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Koki Matsune
- Department of Applied Chemistry, Faculty of Engineering, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu 432-8561, Japan
| | - Hidemi Yoda
- Department of Applied Chemistry, Faculty of Engineering, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu 432-8561, Japan
| |
Collapse
|
3
|
Lin D, Coe M, Krishnamurti V, Ispizua-Rodriguez X, Surya Prakash GK. Recent Advances in Visible Light-Mediated Radical Fluoro-alkylation, -alkoxylation, -alkylthiolation, -alkylselenolation, and -alkylamination. CHEM REC 2023; 23:e202300104. [PMID: 37212421 DOI: 10.1002/tcr.202300104] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 04/20/2023] [Indexed: 05/23/2023]
Abstract
In the last few years, many reagents and protocols have been developed to allow for the efficient fluorofunctionalization of a diverse set of scaffolds ranging from alkanes, alkenes, alkynes, and (hetero)arenes. The concomitant rise of organofluorine chemistry and visible light-mediated synthesis have synergistically expanded the fields and have mutually benefitted from developments in both fields. In this context, visible light driven formations of radicals containing fluorine have been a major focus for the discovery of new bioactive compounds. This review details the recent advances and progress made in visible light-mediated fluoroalkylation and heteroatom centered radical generation.
Collapse
Affiliation(s)
- Daniel Lin
- Loker Hydrocarbon Research Institute Department of Chemistry, University of Southern California, 837 Bloom Walk, 90089-1661, Los Angeles, CA, USA
| | - Matthew Coe
- Loker Hydrocarbon Research Institute Department of Chemistry, University of Southern California, 837 Bloom Walk, 90089-1661, Los Angeles, CA, USA
| | - Vinayak Krishnamurti
- Loker Hydrocarbon Research Institute Department of Chemistry, University of Southern California, 837 Bloom Walk, 90089-1661, Los Angeles, CA, USA
| | - Xanath Ispizua-Rodriguez
- Loker Hydrocarbon Research Institute Department of Chemistry, University of Southern California, 837 Bloom Walk, 90089-1661, Los Angeles, CA, USA
| | - G K Surya Prakash
- Loker Hydrocarbon Research Institute Department of Chemistry, University of Southern California, 837 Bloom Walk, 90089-1661, Los Angeles, CA, USA
| |
Collapse
|
4
|
Mondal S, Chatterjee N, Maity S. Recent Developments on Photochemical Synthesis of 1,n-Dicarbonyls. Chemistry 2023; 29:e202301147. [PMID: 37335758 DOI: 10.1002/chem.202301147] [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: 04/11/2023] [Revised: 06/19/2023] [Accepted: 06/19/2023] [Indexed: 06/21/2023]
Abstract
1,n-dicarbonyls are one of the most fascinating chemical feedstocks finding abundant usage in the field of pharmaceuticals. Besides, they are utilized in a plethora of synthesis in general synthetic organic chemistry. A number of 'conventional' methods are available for their synthesis, such as the Stetter reaction, Baker-Venkatraman rearrangement, oxidation of vicinal diols, and oxidation of deoxybenzoins, synonymous with unfriendly reagents and conditions. In the last 15 years or so, photocatalysis has taken the world of synthetic organic chemistry by a remarkable renaissance. It is fair to say now that everybody loves the light and photoredox chemistry has opened a new gateway to organic chemists towards milder, more simpler alternatives to the previously available methods, allowing access to many sensitive reactions and products. In this review, we present the readers with the photochemical synthesis of a variety of 1,n-dicarbonyls. Diverse photocatalytic pathways to these fascinating molecules have been discussed, placing special emphasis on the mechanisms, giving the reader an opportunity to find all these significant developments in one place.
Collapse
Affiliation(s)
- Subhashis Mondal
- Department of Chemistry & Chemical Biology, Indian Institute of Technology (ISM), Dhanbad, 826004, Jharkhand, India
| | - Nirbhik Chatterjee
- Department of Chemistry, Kanchrapara College, North 24 Parganas, 743145, West Bengal, India
| | - Soumitra Maity
- Department of Chemistry & Chemical Biology, Indian Institute of Technology (ISM), Dhanbad, 826004, Jharkhand, India
| |
Collapse
|
5
|
Upreti GC, Singh T, Chaudhary D, Singh A. Cascade Cyclizations Triggered by Photochemically Generated Carbamoyl Radicals Derived from Alkyl Amines. J Org Chem 2023; 88:11801-11808. [PMID: 37555769 DOI: 10.1021/acs.joc.3c01090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
We report on a visible light-mediated cascade carbamoylation/cyclization of acrylamides using dihydropyridyl carbamoyl donors derived from alkyl amines. Diversely selected acrylamides including 2-cyano-N-arylacrylamides, indolyl- and benzimidazolyl acrylamides, and 2-alkynyl-N-aryl acrylamides participate in this reaction, providing products in good yields. The highlights of this photochemical method include the application of alkyl amine-derived carbamoyl donors, peroxide-free reaction conditions, and a broad scope.
Collapse
Affiliation(s)
| | - Tavinder Singh
- Department of Chemistry, IIT Kanpur, Kanpur, 208016 Uttar Pradesh, India
| | - Divakar Chaudhary
- Department of Chemistry, IIT Kanpur, Kanpur, 208016 Uttar Pradesh, India
| | - Anand Singh
- Department of Chemistry, IIT Kanpur, Kanpur, 208016 Uttar Pradesh, India
- Department of Sustainable Energy Engineering, IIT Kanpur, Kanpur, 208016 Uttar Pradesh, India
| |
Collapse
|
6
|
Zhao YS, Huang SJ, Gu YQ, Liu GK. Visible-light photoredox-catalyzed radical aryldifluoromethylation of N-arylacrylamides with S-(difluoromethyl)sulfonium salt. Org Biomol Chem 2023; 21:4013-4017. [PMID: 37128753 DOI: 10.1039/d3ob00488k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
A facile and highly efficient visible-light photoredox-catalyzed protocol for aryldifluoromethylation of acrylamides was developed using S-(difluoromethyl)sulfonium salt as the difluoromethyl source. With this method, pharmaceutically interesting CF2H-containing oxindoles were readily accessed from N-arylacrylamides, and this method featured mild reaction conditions, a broad scope of substrates, good tolerance of functional groups, and good to excellent yields. Control experiments revealed that this protocol proceeded through a difluoromethylation/cyclization cascade process.
Collapse
Affiliation(s)
- Ya-Shi Zhao
- School of Pharmaceutical Sciences, Shenzhen University Medical School, Shenzhen University, 1066 Xueyuan Avenue, Nanshan District, Shenzhen 518055, China.
| | - Sheng-Jie Huang
- School of Pharmaceutical Sciences, Shenzhen University Medical School, Shenzhen University, 1066 Xueyuan Avenue, Nanshan District, Shenzhen 518055, China.
| | - Yuan-Qing Gu
- School of Pharmaceutical Sciences, Shenzhen University Medical School, Shenzhen University, 1066 Xueyuan Avenue, Nanshan District, Shenzhen 518055, China.
| | - Guo-Kai Liu
- School of Pharmaceutical Sciences, Shenzhen University Medical School, Shenzhen University, 1066 Xueyuan Avenue, Nanshan District, Shenzhen 518055, China.
| |
Collapse
|
7
|
Dong DQ, Yang SH, Wu P, Wang JZ, Min LH, Yang H, Zhou MY, Wei ZH, Ding CZ, Wang YL, Gao JH, Wang SJ, Wang ZL. Copper-Catalyzed Difluoroalkylation Reaction. Molecules 2022; 27:molecules27238461. [PMID: 36500553 PMCID: PMC9740754 DOI: 10.3390/molecules27238461] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/14/2022] [Accepted: 11/14/2022] [Indexed: 12/07/2022] Open
Abstract
This review describes recent advances in copper-catalyzed difluoroalkylation reactions. The RCF2 radical is generally proposed in the mechanism of these reactions. At present, various types of copper-catalyzed difluoroalkylation reactions have been realized. According to their characteristics, we classify these difluoroalkylation reactions into three types.
Collapse
Affiliation(s)
- Dao-Qing Dong
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Shao-Hui Yang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Pei Wu
- Shandong Academy of Pesticide Sciences, Beiyuan Street, Jinan 250033, China
- Correspondence: (P.W.); (Z.-L.W.)
| | - Jin-Zhi Wang
- Tancheng County Agricultural Technology Popularization Center, Linyi 276100, China
| | - Ling-Hao Min
- Qingdao Zhongda Agritech Co., Ltd., Qingdao 266109, China
| | - Hao Yang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Meng-Yu Zhou
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Ze-Hui Wei
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Cai-Zhen Ding
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Yan-Li Wang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Jia-Hui Gao
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Shu-Jie Wang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Zu-Li Wang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
- National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass, Nanjing Forestry University, Nanjing 210037, China
- Correspondence: (P.W.); (Z.-L.W.)
| |
Collapse
|
8
|
Wang L, Zhang Y, Zhu T, Wu J. Difluoromethylarylation of Alkynes from [Bis(difluoroacetoxy)iodo]benzene: Access to CF 2H-Containing Dibenzazepines. J Org Chem 2022; 87:7551-7556. [PMID: 35549257 DOI: 10.1021/acs.joc.2c00584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A photoinduced radical difluoromethylarylation via tandem addition-cyclization of alkynes with easily available [bis(difluoroacetoxy)iodo]benzene is accomplished, providing a straightforward and practical route for the construction of difluoromethylated dibenzazepines. Various sensitive functional groups can be compatible under photoinduced conditions. Mechanism investigation reveals that this transformation is initiated by the addition of alkyne with difluoromethyl radical, generated in situ from [bis(difluoroacetoxy)iodo]benzene.
Collapse
Affiliation(s)
- Luoyu Wang
- School of Pharmaceutical and Materials Engineering & Institute for Advanced Studies, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China
| | - Yan Zhang
- School of Pharmaceutical and Materials Engineering & Institute for Advanced Studies, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China
| | - Tonghao Zhu
- School of Pharmaceutical and Materials Engineering & Institute for Advanced Studies, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China
| | - Jie Wu
- School of Pharmaceutical and Materials Engineering & Institute for Advanced Studies, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China.,School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| |
Collapse
|
9
|
Wang X, Liu R, Zhang S, Zhou T, Zhao X, Lu K. Visible-light-induced Radical Cyclization of N-allylbenzamide with [Bis(difluoroacetoxy)iodo]benzene to Difluoromethylated Dihydroisoquinolinones. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153761] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
10
|
Nambo M, Maekawa Y, Crudden CM. Desulfonylative Transformations of Sulfones by Transition-Metal Catalysis, Photocatalysis, and Organocatalysis. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05608] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Masakazu Nambo
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Chikusa, Nagoya, Japan, 464-8602
| | - Yuuki Maekawa
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Chikusa, Nagoya, Japan, 464-8602
- Department of Chemistry, Queen’s University, Chernoff Hall, Kingston, Ontario, Canada, K7L 4 V1
| | - Cathleen M. Crudden
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Chikusa, Nagoya, Japan, 464-8602
- Department of Chemistry, Queen’s University, Chernoff Hall, Kingston, Ontario, Canada, K7L 4 V1
| |
Collapse
|
11
|
Chen N, Lei J, Wang Z, Liu Y, Sun K, Tang S. Construction of Fluoro-containing Heterocycles Mediated by Free Radicals. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202109033] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
12
|
Feng J, Jia X, Zhang S, Lu K, Cahard D. State of knowledge in photoredox-catalysed direct difluoromethylation. Org Chem Front 2022. [DOI: 10.1039/d2qo00551d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The combination of visible light photoredox catalysis with direct difluoromethylation has allowed the synthesis of a large choice of CF2H-containing value-added molecules under very mild reaction conditions.
Collapse
Affiliation(s)
- Jiaxu Feng
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, P.R. China
- Department of Chemistry, College of Sciences, Tianjin University of Science & Technology, Tianjin 300457, P.R. China
| | - Xiaodong Jia
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, P.R. China
| | - Shuyue Zhang
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, P.R. China
| | - Kui Lu
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, P.R. China
- Department of Chemistry, College of Sciences, Tianjin University of Science & Technology, Tianjin 300457, P.R. China
| | - Dominique Cahard
- CNRS, UMR 6014 COBRA, Normandie Université, 76821 Mont Saint Aignan, France
| |
Collapse
|
13
|
Patel S, Paul B, Paul H, Shankhdhar R, Chatterjee I. Redox-active alkylsulfones as precursors for alkyl radicals under photoredox catalysis. Chem Commun (Camb) 2022; 58:4857-4860. [DOI: 10.1039/d2cc00163b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Visible-light photoredox catalytic method for the generation of alkyl radicals using redox-active alkylsulfones to form a new C–C bond is reported.
Collapse
Affiliation(s)
- Sandeep Patel
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab-140001, India
| | - Biprajit Paul
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab-140001, India
| | - Hrishikesh Paul
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab-140001, India
| | - Rajat Shankhdhar
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab-140001, India
| | - Indranil Chatterjee
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab-140001, India
| |
Collapse
|
14
|
Li Z, Wu YH, Xi JM, Wei ZL, Liao WW. Copper-Catalyzed Difluoroalkylation of Alkene/Nitrile Insertion/Cyclization Tandem Sequences: Construction of Difluorinated Bicyclic Amidines. Org Lett 2021; 23:9591-9596. [PMID: 34874172 DOI: 10.1021/acs.orglett.1c03802] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A copper-catalyzed difluoroalkylation of an alkene/nitrile insertion/cyclization tandem sequence of N-cyanamide alkene was described, which provided a convenient synthetic approach for accessing difluorinated bicyclic amidines bearing imine moieties in a sustainable fashion. This protocol is characterized by high yields, a broad substrate scope, and good functional group compatibility. In addition, the desired product can be readily converted into other valuable functionalized fluorinated aza-heterocycles.
Collapse
Affiliation(s)
- Zheng Li
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Yu-Heng Wu
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Ji-Ming Xi
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Zhong-Lin Wei
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Wei-Wei Liao
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
| |
Collapse
|
15
|
Persulfate promoted tandem radical cyclization of ortho-cyanoarylacrylamides with oxamic acids for construction of carbamoyl quinoline-2,4-diones under metal-free conditions. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.04.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|
16
|
Affiliation(s)
- Jitender Singh
- Department of Chemistry Indian Institute of Technology Roorkee Roorkee 247667 India
| | - Anuj Sharma
- Department of Chemistry Indian Institute of Technology Roorkee Roorkee 247667 India
| |
Collapse
|
17
|
Visible-light-initiated tandem synthesis of difluoromethylated oxindoles in 2-MeTHF under additive-, metal catalyst-, external photosensitizer-free and mild conditions. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.01.021] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
18
|
Metal-free iodic acid-triggered cascade cyclization of alkenes with N-hydroxyphthalimide: A simple and mild access to aminooxylated 3,3-disubstituted 2-oxindoles. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.152874] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
19
|
Nambo M, Tahara Y, Yim JCH, Yokogawa D, Crudden CM. Synthesis of quaternary centres by single electron reduction and alkylation of alkylsulfones. Chem Sci 2021; 12:4866-4871. [PMID: 34168761 PMCID: PMC8179647 DOI: 10.1039/d1sc00133g] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
A new method for the generation of tertiary radicals through single electron reduction of alkylsulfones promoted by Zn and 1,10-phenanthroline has been developed. These radicals could be employed in the Giese reaction, affording structurally diverse quaternary products in good yields. With the high modularity and functional group compatibility of sulfones, the utility of this method was demonstrated by intramolecular and iterative reactions to give complex structures. The radical generation process was investigated by control experiments and theoretical calculations. A new method for the generation of tertiary radicals through single electron reduction of alkylsulfones promoted by Zn and 1,10-phenanthroline has been developed.![]()
Collapse
Affiliation(s)
- Masakazu Nambo
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University Chikusa Nagoya Aichi 464-8601 Japan
| | - Yasuyo Tahara
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University Chikusa Nagoya Aichi 464-8601 Japan
| | - Jacky C-H Yim
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University Chikusa Nagoya Aichi 464-8601 Japan
| | - Daisuke Yokogawa
- Graduate School of Arts and Science, The University of Tokyo Komaba, Meguro-ku Tokyo 153-8902 Japan
| | - Cathleen M Crudden
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University Chikusa Nagoya Aichi 464-8601 Japan .,Department of Chemistry, Queen's University Chernoff Hall Kingston Ontario K7L 3N6 Canada
| |
Collapse
|
20
|
He SY, Yan XW, Tu HY, Zhang XG. Palladium-catalyzed selective defluorinative arylation for the efficient stereospecific synthesis of ( E)-β-fluoroacrylamides. Org Chem Front 2021. [DOI: 10.1039/d1qo00721a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A practical and efficient method for the synthesis of (E)-β-fluoroacrylamides was developed by the selective defluorinative arylation of trifluoropropanamides with arylboronic acids.
Collapse
Affiliation(s)
- Shi-Yu He
- Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, Hezhou University, Hezhou 542899, China
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Xiao-Wei Yan
- Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, Hezhou University, Hezhou 542899, China
| | - Hai-Yong Tu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Xing-Guo Zhang
- Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, Hezhou University, Hezhou 542899, China
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| |
Collapse
|
21
|
Zhao Y, Zhang Y, Liu Y, Zhu T, Wu J. Photoredox-catalyzed direct C(sp 2)–H difluoromethylation of enamides or heterocycles with [bis(difluoroacetoxy)iodo]benzene. Org Chem Front 2021. [DOI: 10.1039/d1qo00995h] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A photoredox-catalyzed direct C(sp2)–H difluoromethylation of enamides and heterocycles is accomplished by using easily accessible [bis(difluoroacetoxy)iodo]benzene as the CF2H source.
Collapse
Affiliation(s)
- Yun Zhao
- School of Pharmaceutical and Materials Engineering & Institute for Advanced Studies, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China
| | - Yan Zhang
- School of Pharmaceutical and Materials Engineering & Institute for Advanced Studies, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China
| | - Yating Liu
- School of Pharmaceutical and Materials Engineering & Institute for Advanced Studies, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China
| | - Tonghao Zhu
- School of Pharmaceutical and Materials Engineering & Institute for Advanced Studies, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China
| | - Jie Wu
- School of Pharmaceutical and Materials Engineering & Institute for Advanced Studies, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| |
Collapse
|
22
|
Wang X, Lei J, Liu Y, Ye Y, Li J, Sun K. Fluorination and fluoroalkylation of alkenes/alkynes to construct fluoro-containing heterocycles. Org Chem Front 2021. [DOI: 10.1039/d0qo01629b] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This review summarize the established strategies through fluorination and fluoroalkylation of alkenes/alkynes for constructing fluoro-containing heterocycles. Reaction scopes, mechanisms and some shortcomings are also discussed.
Collapse
Affiliation(s)
- Xin Wang
- School of Chemistry and Chemical Engineering
- YanTai University
- Yantai
- P. R. China
| | - Jia Lei
- School of Pharmacy
- Harbin University of Commerce
- Harbin
- P. R. China
| | - Yingjie Liu
- School of Pharmacy
- Harbin University of Commerce
- Harbin
- P. R. China
| | - Yong Ye
- College of Chemistry
- Zhengzhou University
- Zhengzhou 450001
- P. R. China
| | - Jiazhu Li
- School of Chemistry and Chemical Engineering
- YanTai University
- Yantai
- P. R. China
| | - Kai Sun
- School of Chemistry and Chemical Engineering
- YanTai University
- Yantai
- P. R. China
| |
Collapse
|
23
|
Sun YY, Song JC, Yang SH, Wang ZL, Zhang EX, Han QQ, Yue S. Visible light induced radical cascade cyclization of ortho-cyanoarylacrylamides with phosphine oxides for the preparation of phosphorylated quinoline-2,4(1 H,3 H)-dione. NEW J CHEM 2021. [DOI: 10.1039/d1nj03579g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Visible light induced cascade cyclization of ortho-cyanoarylacrylamides with phosphine oxides for the preparation of phosphorylated quinoline-2,4(1H,3H)-dione was presented. Products with moderate to good yields were efficiently isolated.
Collapse
Affiliation(s)
- Yuan-Yuan Sun
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, P. R. China
| | - Jing-Cheng Song
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, P. R. China
| | - Shao-Hui Yang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, P. R. China
| | - Zu-Li Wang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, P. R. China
| | - En-Xuan Zhang
- Asymchem Life Science (Tianjin) Co., Ltd, Tianjin 300457, China
| | - Qing-Qing Han
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, P. R. China
| | - Shan Yue
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, P. R. China
| |
Collapse
|
24
|
Shen XQ, Wang SQ, Fan D, Zhang XG, Tu HY. Copper-Catalyzed Selective Defluorinative Sulfuration of Trifluoropropanamides Leading to α-Fluorothioacrylamides. J Org Chem 2020; 86:1591-1600. [PMID: 33372521 DOI: 10.1021/acs.joc.0c02436] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A practical and efficient method for the synthesis of α-fluorothioacrylamide was developed from selective defluorinative sulfuration of trifluoropropanamides with disulfides. The N-chelation-assisted copper-catalyzed defluorination and sulfurization reactions feature excellent functional group tolerance and incorporation of both sulfur atoms of disulfides into acrylamides.
Collapse
Affiliation(s)
- Xiao-Qin Shen
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Sui-Qian Wang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Dongfeng Fan
- Zhejiang Huafon Thermoplastic Polyurethane Company Limited, Ruian 325200, China
| | - Xing-Guo Zhang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China.,Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, Hezhou University, Hezhou 542899, China
| | - Hai-Yong Tu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| |
Collapse
|
25
|
Yin Z, Yu Y, Li C, Mei H, Zhu K, Han J. Sulfuration‐Triggered Radical Cyclization of
o
‐Cyanoarylacrylamides to 3‐Thiomethylated Quinoline‐2,4‐dione. ChemistrySelect 2020. [DOI: 10.1002/slct.202003999] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Zizhen Yin
- Jiangsu Co–Innovation Center of Efficient Processing and Utilization of Forest Resources College of Chemical Engineering Nanjing Forestry University Nanjing 210037 China
| | - Yingjie Yu
- Jiangsu Co–Innovation Center of Efficient Processing and Utilization of Forest Resources College of Chemical Engineering Nanjing Forestry University Nanjing 210037 China
| | - Chunxiang Li
- Shandong Key Laboratory of Biochemical Analysis College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 PR China
| | - Haibo Mei
- Jiangsu Co–Innovation Center of Efficient Processing and Utilization of Forest Resources College of Chemical Engineering Nanjing Forestry University Nanjing 210037 China
| | - Kai Zhu
- Jiangsu Co–Innovation Center of Efficient Processing and Utilization of Forest Resources College of Chemical Engineering Nanjing Forestry University Nanjing 210037 China
| | - Jianlin Han
- Jiangsu Co–Innovation Center of Efficient Processing and Utilization of Forest Resources College of Chemical Engineering Nanjing Forestry University Nanjing 210037 China
| |
Collapse
|
26
|
Liu JK, Sun H, Jiang Y, Lu MK, Li YY, Li L. Iron-Catalyzed Tandem Radical Addition/Cyclization: Highly Efficient Access to Methylated Quinoline-2,4-diones. Synlett 2020. [DOI: 10.1055/s-0039-1691574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
A visible-light-induced and iron-catalyzed oxidative radical addition/cyclization cascade reaction of N-(o-cyanoaryl)acrylamides with dimethyl sulfoxide has been developed. The method exhibits a wide substrate scope and an excellent functional-group tolerance, thus providing an efficient and convenient access to a variety of methylated quinoline-2,4-diones.
Collapse
Affiliation(s)
- Ji-Kai Liu
- School of Pharmaceutical Sciences, South-Central University for Nationalities
| | | | | | | | | | | |
Collapse
|
27
|
Syntheses of 3,3-Disubstituted Dihydrobenzofurans, Indolines, Indolinones and Isochromanes by Palladium-Catalyzed Tandem Reaction Using Pd(PPh3)2Cl2/(±)-BINAP as a Catalytic System. Catalysts 2020. [DOI: 10.3390/catal10091084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
A general procedure for the tandem arylation reaction of arylbromide with heteroaryl compounds was developed by using Pd(PPh3)2Cl2/(±)-BINAP (1,1′-Binaphthalene-2,2′-diylbis (diphenylphosphane)) as catalytic system. Both sulphur- and oxygen-containing heterocycles were also employed as an efficient reagent for arylation, which gave moderate to excellent yields with moderate to good regioselectivities (5:1 to > 20:1 ir (isomer ratio)). Except for dihydrobenzofurans, indolines and indolinones, this type of tandem reaction was also expanded to synthesize isochromanes. The synthesized new compounds were well characterized through different spectroscopic techniques, such as 1H and 13C NMR (nuclear magnetic resonance), and mass spectral analysis.
Collapse
|
28
|
Radical C–H 18F-Difluoromethylation of Heteroarenes with [18F]Difluoromethyl Heteroaryl-Sulfones by Visible Light Photoredox Catalysis. Catalysts 2020. [DOI: 10.3390/catal10030275] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
The 18F-labeling of CF2H groups has been recently studied in radiopharmaceutical chemistry owing to the favorable nuclear and physical characteristics of the radioisotope 18F for positron emission tomography (PET). Following up on the reported efficiency of the [18F]difluoromethyl benzothiazolyl-sulfone ([18F]1) as a 18F-difluoromethylating reagent, we investigated the influence of structurally-related [18F]difluoromethyl heteroaryl-sulfones in the reactivity toward the photoredox C–H 18F-difluoromethylation of heteroarenes under continuous-flow conditions. In the present work, six new [18F]difluoromethyl heteroaryl-sulfones [18F]5a–[18F]5f were prepared and, based on the overall radiochemical yields (RCYs), three of these reagents ([18F]5a, [18F]5c, and [18F]5f) were selected for the fully automated radiosynthesis on a FASTlabTM synthesizer (GE Healthcare) at high level of starting radioactivity. Subsequently, their efficiency as 18F-difluoromethylating reagents was evaluated using the antiherpetic drug acyclovir as a model substrate. Our results showed that the introduction of molecular modifications in the structure of [18F]1 influenced the amount of fac-IrIII(ppy)3 and the residence time needed to ensure a complete C–H 18F-difluoromethylation process. The photocatalytic C–H 18F-difluoromethylation reaction with the reagents [18F]5a, [18F]5c, and [18F]5f was extended to other heteroarenes. Radical-trapping experiments demonstrated the likely involvement of radical species in the C–H 18F-difluoromethylation process.
Collapse
|
29
|
Li C, Zhao Y, Zhou J, Wang X, Hou J, Song Y, Liu W, Han G. Synthesis of difluoroalkylated 2-azaspiro[4.5]decane derivatives via copper-catalyzed difluoroalkylation/dearomatization of N-benzylacrylamides. Org Biomol Chem 2020; 18:8376-8380. [DOI: 10.1039/d0ob01833c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A copper-catalyzed synthesis of difluoroalkylated spiro-azacycles from N-benzylacrylamides is presented. The reaction involves the β-difluoroalkylation of acrylamide, 5-exo cyclization, and dearomatization.
Collapse
Affiliation(s)
- Chengwen Li
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics
- School of Pharmacy
- Tianjin Medical University
- Tianjin 300070
- P. R. China
| | - Yilin Zhao
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics
- School of Pharmacy
- Tianjin Medical University
- Tianjin 300070
- P. R. China
| | - Jiaxin Zhou
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics
- School of Pharmacy
- Tianjin Medical University
- Tianjin 300070
- P. R. China
| | - Xue Wang
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics
- School of Pharmacy
- Tianjin Medical University
- Tianjin 300070
- P. R. China
| | - Jingli Hou
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics
- School of Pharmacy
- Tianjin Medical University
- Tianjin 300070
- P. R. China
| | - Yuguang Song
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics
- School of Pharmacy
- Tianjin Medical University
- Tianjin 300070
- P. R. China
| | - Wenjuan Liu
- Jiangsu Duxingzhiyuan New Material Technology Co. Ltd
- Nantong
- 226300
- P. R. China
| | - Guifang Han
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics
- School of Pharmacy
- Tianjin Medical University
- Tianjin 300070
- P. R. China
| |
Collapse
|