1
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Fukuda T, Kishikawa N, El-Maghrabey M, Nakamura S, Ohba Y, Kawakami S, Wada M, Kuroda N. 4-Iodobenzonitrile as a fluorogenic derivatization reagent for chromatographic analysis of L-p-boronophenylalanine in whole blood samples using Suzuki coupling reaction. Anal Chim Acta 2024; 1313:342700. [PMID: 38862203 DOI: 10.1016/j.aca.2024.342700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 05/04/2024] [Accepted: 05/06/2024] [Indexed: 06/13/2024]
Abstract
BACKGROUND L-p-Boronophehylalanine (BPA) is used in boron neutron capture therapy (BNCT), which is a novel selective cancer radiotherapy technique. It is important to measure BPA levels in human blood for effective radiotherapy; a prompt gamma-ray spectrometer, ICP-AES, and ICP-MS have been used for this purpose. However, these methods require sophisticated and expensive apparatuses as well as experienced analysts. Herein, we propose an HPLC-FL method for the determination of BPA after precolumn derivatization. A new fluorogenic reagent for aryl boronic acid derivatives, namely, 4-iodobenzonitrile, was employed for the fluorogenic derivatization of BPA based on the Suzuki coupling reaction. RESULTS After the fluorogenic derivatization, a fluorescent cyanobiphenyl derivative is formed with maximum fluorescence at 335 nm after excitation at 290 nm. The developed method showed good linearity (r2=0.997) over the concentration range of 0.5-1000 nmol/L, and the detection limit (S/N = 3) was 0.26 nmol/L. The proposed method is more sensitive than previously reported methods for the determination of BPA, including the ICP-MS. Finally, the proposed method was successively applied to the measurement of BPA in human whole blood samples with a good recovery rate (≥95.7 %) using only 10 μL of blood sample. The proposed method offers a simple and efficient solution for monitoring BPA levels in BNCT-treated patients. SIGNIFICANCE 4-Iodobenzonitrile was investigated as a new fluorogenic reagent for BPA based on Suzuki coupling. A new HPLC-FL method for BPA in whole blood samples with ultrasensitivity was developed. The developed method is superior in sensitivity to all previously reported methods for BPA. The method requires only a very small sample volume, making it suitable for micro-blood analysis of BPA via fingerstick sampling.
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Affiliation(s)
- Takayuki Fukuda
- Department of Analytical Chemistry for Pharmaceuticals, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Naoya Kishikawa
- Department of Analytical Chemistry for Pharmaceuticals, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Mahmoud El-Maghrabey
- Department of Analytical Chemistry for Pharmaceuticals, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan; Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, 35516, Mansoura, Egypt
| | - Saori Nakamura
- Faculty of Pharmaceutical Sciences, Nagasaki International University, 2825-7 HuisTen Bosch Cho, Sasebo, Nagasaki, 859-3298, Japan
| | - Yoshihito Ohba
- Faculty of Pharmaceutical Sciences, Nagasaki International University, 2825-7 HuisTen Bosch Cho, Sasebo, Nagasaki, 859-3298, Japan
| | - Shigeru Kawakami
- Department of Pharmaceutical Informatics, Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1 Sakamoto, Nagasaki, 852-8588, Japan
| | - Mitsuhiro Wada
- Faculty of Pharmaceutical Sciences, Sanyo-Onoda City University, 1-1-1 Daigakudori, SanyoOnoda, Yamaguchi, 756-0884, Japan
| | - Naotaka Kuroda
- Department of Analytical Chemistry for Pharmaceuticals, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan.
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2
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Ye S, Wang H, Liang G, Hu Z, Wan K, Zhang L, Peng B. ortho-Cyanomethylation of aryl fluoroalkyl sulfoxides via a sulfonium-Claisen rearrangement. Org Biomol Chem 2024; 22:1495-1499. [PMID: 38293848 DOI: 10.1039/d3ob02102e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
We hereby report the ortho-cyanomethylation of aryl fluoroalkyl sulfoxides with acetonitrile through a sulfonium-Claisen-type rearrangement. This reaction enables the incorporation of two valuable functional groups, such as the cyanomethyl group and the fluoroalkylthio group, into arenes. Remarkably, fluoroalkylthio groups, such as SCFH2 and SCF2H, bearing active hydrogen, are well tolerated by the reaction. The success of the reaction relies on the use of an excess amount of acetonitrile and the electronegative effect of fluoroalkyl substituents, both of which promote the electrophilic assembly of sulfoxides with acetonitrile. Consequently, the sulfonium-Claisen rearrangement reaction tolerates a wide variety of fluoroalkyl sulfoxides bearing functional groups including halides, nitriles, ketones, sulfones, and amides, which are appealing for subsequent elaboration and exploration.
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Affiliation(s)
- Sheng Ye
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China.
| | - Huanhuan Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China.
| | - Guoqing Liang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China.
| | - Zhengkai Hu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China.
| | - Kun Wan
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China.
| | - Lei Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China.
| | - Bo Peng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China.
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3
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Zhang J, Wang L, Ji Q, Liu F. DNA-Compatible Cyanomethylation of (Hetero)aryl Halides or Triflates under a Tandem Reaction for DNA-Encoded Library Synthesis. Org Lett 2023; 25:6931-6936. [PMID: 37677078 DOI: 10.1021/acs.orglett.3c02850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
A DNA-compatible reaction has been developed for the cyanomethylation of (hetero)aryl halides or triflates via a tandem process involving palladium-mediated Suzuki-Miyaura coupling and base-promoted isoxazole fragmentation. This one-pot protocol employs easily accessible starting materials, exhibits a wide substrate scope, and results in no significant DNA damage. Additionally, the resulting (hetero)arylacetonitriles can be converted into the corresponding carboxylic acids, which may be utilized for the synthesis of DNA-encoded chemical libraries.
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Affiliation(s)
- Jie Zhang
- R&D Institute, Chia Tai Tianqing Pharmaceutical Group Co., Ltd., Nanjing 211122, Jiangsu Province, China
| | - Lu Wang
- R&D Institute, Chia Tai Tianqing Pharmaceutical Group Co., Ltd., Nanjing 211122, Jiangsu Province, China
| | - Qian Ji
- R&D Institute, Chia Tai Tianqing Pharmaceutical Group Co., Ltd., Nanjing 211122, Jiangsu Province, China
| | - Fei Liu
- R&D Institute, Chia Tai Tianqing Pharmaceutical Group Co., Ltd., Nanjing 211122, Jiangsu Province, China
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4
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Priya H, Paranjothy M. Collision Induced Dissociation of Deprotonated Isoxazole and 3-Methyl Isoxazole via Direct Chemical Dynamics Simulations. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2023; 34:710-719. [PMID: 36951239 DOI: 10.1021/jasms.2c00366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Isoxazoles are an important class of organic compounds widely employed in synthesis and drug design. Fragmentation chemistry of the parent isoxazole molecule and its substituents has been the subject of several experimental and theoretical investigations. Collision induced dissociation (CID) of isoxazole and its substituents has been studied experimentally under negative ion conditions. Based on the observed reaction products, dissociation patterns were proposed. In the present work, we studied the dissociation chemistry of deprotonated isoxazole and 3-methyl isoxazole using electronic structure theory calculations and direct chemical dynamics simulations. Various deprotonated isomers of these molecules were activated by collision with an Ar atom, and the ensuing fractionation patterns were studied using on-the-fly classical trajectory simulations at the density functional B3LYP/6-31+G* level of electronic structure theory. A variety of reaction products and pathways were observed, and it was found that a nonstatistical shattering mechanism dominates the CID dynamics of these molecules. Simulation results are compared with experiments, and detailed atomic level dissociation mechanisms are presented.
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Affiliation(s)
- Himani Priya
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, 342030 Rajasthan, India
| | - Manikandan Paranjothy
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, 342030 Rajasthan, India
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5
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Muto R, Nagata K, Nakazumi Y, Nakamura K, Ueno S. Palladium-Catalyzed para-Selective Allylation of 1-(Cyanomethyl)arenes with Allyl Acetates. Org Lett 2023; 25:2108-2112. [PMID: 36940090 DOI: 10.1021/acs.orglett.3c00534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2023]
Abstract
The Pd/PMe3-catalyzed allylation of 1-(cyanomethyl)naphthalenes with allyl acetates proved to be para- rather than α-regioselective. This reaction is thought to proceed through ligand attack of the para-carbon in the arenes, electronically enriched by a cyano-stabilized α-carbanion, to the (π-allyl)palladium and a 1,5-hydrogen shift of the para-hydrogen from the dearomatized intermediate.
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Affiliation(s)
- Rina Muto
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan
| | - Kenji Nagata
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan
| | - Yoshiki Nakazumi
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan
| | - Kaho Nakamura
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan
| | - Satoshi Ueno
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan
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6
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Goebel JF, Löffler J, Zeng Z, Handelmann J, Hermann A, Rodstein I, Gensch T, Gessner VH, Gooßen LJ. Computer-Driven Development of Ylide Functionalized Phosphines for Palladium-Catalyzed Hiyama Couplings. Angew Chem Int Ed Engl 2023; 62:e202216160. [PMID: 36538000 DOI: 10.1002/anie.202216160] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 12/16/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022]
Abstract
Palladium-catalyzed couplings of silicon enolates with aryl electrophiles are of great synthetic utility, but often limited to expensive bromide substrates. A comparative experimental study confirmed that none of the established ligand systems allows to couple inexpensive aryl chlorides with α-trimethylsilyl alkylnitriles. In contrast, ylide functionalized phosphines (YPhos) led to encouraging results. A statistical model was developed that correlates the reaction yields with ligand features. It was employed to predict catalyst structures with superior performance. With this cheminformatics approach, YPhos ligands were tailored specifically to the demands of Hiyama couplings. The newly synthesized ligands displayed record-setting activities, enabling the elusive coupling of aryl chlorides with α-trimethylsilyl alkyl nitriles. The preparative utility of the catalyst system was demonstrated by the synthesis of pharmaceutically meaningful α-aryl alkylnitriles, α-arylcarbonyls and biaryls.
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Affiliation(s)
- Jonas F Goebel
- Chair of Organic Chemistry I, Ruhr-Universität Bochum, Universitätsstr. 150, 44801, Bochum, Germany
| | - Julian Löffler
- Chair of Inorganic Chemistry II, Ruhr-Universität Bochum, Universitätsstr. 150, 44801, Bochum, Germany
| | - Zhongyi Zeng
- Chair of Organic Chemistry I, Ruhr-Universität Bochum, Universitätsstr. 150, 44801, Bochum, Germany
| | - Jens Handelmann
- Chair of Inorganic Chemistry II, Ruhr-Universität Bochum, Universitätsstr. 150, 44801, Bochum, Germany
| | - Albert Hermann
- Chair of Organic Chemistry I, Ruhr-Universität Bochum, Universitätsstr. 150, 44801, Bochum, Germany
| | - Ilja Rodstein
- Chair of Inorganic Chemistry II, Ruhr-Universität Bochum, Universitätsstr. 150, 44801, Bochum, Germany
| | - Tobias Gensch
- Department of Chemistry, TU Berlin, 10623, Berlin, Germany
| | - Viktoria H Gessner
- Chair of Inorganic Chemistry II, Ruhr-Universität Bochum, Universitätsstr. 150, 44801, Bochum, Germany
| | - Lukas J Gooßen
- Chair of Organic Chemistry I, Ruhr-Universität Bochum, Universitätsstr. 150, 44801, Bochum, Germany
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7
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Ghosh T, Biswas D, Bhakta S. Palladium-Catalyzed Synthesis of Fused Carbo- and Heterocycles: Recent Advances. Chem Asian J 2022; 17:e202200725. [PMID: 36065137 DOI: 10.1002/asia.202200725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 09/03/2022] [Indexed: 11/10/2022]
Abstract
The use of palladium catalysts in fused ring synthesis has been increasingly noteworthy in recent years in organic synthesis. It has a lot of potential compared to other transition metal catalysts, because of its one-of-a-kind feature that makes them more widely applicable in a variety of disciplines application. Palladium is important in a variety of Heck processes, including intramolecular, intermolecular, and reductive Heck reactions, which produce diverse carbocycles and heterocycles of biological importance. Under optimal reaction conditions, carbocyclization or heterocyclization occurs, resulting in the production of numerous structural building blocks of naturally occurring compounds. Beside intramolecular Heck-type reactions, cycloaddition, cycloalkylation, oxidative coupling, C-H functionalization, cross-coupling reactions, and carboamidation reactions have also been employed extensively to access fused carbo- and heterocycles of immense biological importance. This review article provides a well-summarized discussion (since 2001) on fused carbo- and heterocycle ring synthesis using palladium catalysts, overviewing their applications, and mechanistic insights.
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Affiliation(s)
- Tapas Ghosh
- Maulana Abul Kalam Azad University of Technology, Applied Sciences, Simhat, Haringhata, 741249, Haringhata, INDIA
| | - Diptam Biswas
- Maulana Abul Kalam Azad University of Technology, Applied Chemistry, INDIA
| | - Sayantika Bhakta
- Maulana Abul Kalam Azad University of Technology, Applied Chemistry, INDIA
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8
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Liang Y, Peng B. Revisiting Aromatic Claisen Rearrangement Using Unstable Aryl Sulfonium/Iodonium Species: The Strategy of Breaking Up the Whole into Parts. Acc Chem Res 2022; 55:2103-2122. [PMID: 35861672 DOI: 10.1021/acs.accounts.2c00263] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
ConspectusSince Ludwig Claisen's discovery of the sigmatropic rearrangement of allyl aryl ethers in 1912, aromatic Claisen rearrangement has continuously attracted the attention of both experimental and theoretical chemists. Over more than a century of growth, this protocol has proven to be a practical and powerful synthetic tool in many aspects. However, the reaction scope has long been limited to aryl ethers and their S or N analogs until the serendipitous discovery of aromatic iodonium-Claisen rearrangement by Oh et al. in 1988 and the development of aromatic sulfonium-Claisen rearrangement by Kita et al. in 2004. Unlike traditional Claisen rearrangements, these hypervalent-bonding-based Claisen-type rearrangements can be performed by simply mixing electrophilically activated aryl sulfoxides/iodanes with certain nucleophiles to directly deliver rearrangement products. In addition to the simple operation, remarkable features, such as readily available substrates, valuable products and intriguing rearrangement patterns, have led to a dramatic resurgence of this rearrangement chemistry.In this Account, we summarize our recent works on developing new aromatic rearrangement modes using sulfonium/iodonium reagents. Interestingly, the program started with an accidental discovery that aryl sulfoxides could be coupled with alkyl nitriles in the presence of Tf2O and base. Mechanistic studies reveal that the reaction proceeds in three major steps, including the Tf2O-triggered assembly of both coupling partners, base-promoted deprotonation of in situ-generated aryl sulfonium-imine species leading to a key rearrangement precursor called aryl sulfonium-ketenimine species, and subsequent facile and rapid [3,3]-rearrangement. On the basis of the mechanistic underpinning, we divided the one-step operation into two steps called the "assembly/deprotonation" protocol for constructing unstable rearrangement precursors. Most notably, the switch from the commonly used one-step to mechanism-based multiple-step manipulation, which can be termed "breaking up the whole into parts", not only enables the independent control of each step of the reaction, thus significantly expanding the accessible synthetic scope, but also raises opportunities for developing new rearrangement patterns. For example, the "assembly/deprotonation" protocol has also been applied to the development of [5,5]-rearrangement of aryl sulfoxides and the asymmetric rearrangement of aryl iodanes, thus enabling the unprecedented regio- and stereocontrol of the rearrangement process. Furthermore, the "breaking up the whole into parts" thinking triggered us to merge the Morita-Baylis-Hillman (MBH) reaction into the rearrangement process to accomplish Z-selective MBH-type [3,3]-rearrangement of α,β-unsaturated nitriles and E-selective MBH-type [3,3]-rearrangement of α,β-unsaturated 2-oxazolines, which expands the scope of rearrangement partners to include α,β-unsaturated carbonyls. In addition, the impressive rapidity of the rearrangement process found in our initial discovery has also been recognized as a congestion-acceleration effect, which was further utilized to forge the rapid ortho-cyanoalkylative rearrangement of aryl iodanes, and thus leading to the first dearomatization of aryl iodanes. We anticipate that our protocols and ideas behind the methods will be complementary to the traditional thinking of the aromatic Claisen rearrangement.
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Affiliation(s)
- Yuchen Liang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, 688 Yingbin Road, Jinhua321004, China
| | - Bo Peng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, 688 Yingbin Road, Jinhua321004, China
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9
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Pan C, Meng Y, Deng Y, Zhou B, Chen J, He Z, Sun W, Khan R, Fan B. Metal‐Free Visible‐Light‐Induced Atom‐Transfer
Radical Addition Reaction of Alkenes/Alkynes with
ICH
2
CN
. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202200144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Chunxiang Pan
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University Yuehua Street Kunming Yunnan 650500 China
| | - Yunyan Meng
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University Yuehua Street Kunming Yunnan 650500 China
| | - Yao Deng
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University Yuehua Street Kunming Yunnan 650500 China
| | - Bingjie Zhou
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University Yuehua Street Kunming Yunnan 650500 China
| | - Jingchao Chen
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University Yuehua Street Kunming Yunnan 650500 China
| | - Zhenxiu He
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University Yuehua Street Kunming Yunnan 650500 China
| | - Weiqing Sun
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University Yuehua Street Kunming Yunnan 650500 China
| | - Ruhima Khan
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University Yuehua Street Kunming Yunnan 650500 China
| | - Baomin Fan
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University Yuehua Street Kunming Yunnan 650500 China
- Key Laboratory of Advanced Synthetic Chemistry, Yunnan Minzu University Yuehua Street Kunming Yunnan 650500 China
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10
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Yao H, Zhong X, Wang B, Lin S, Yan Z. Cyanomethylation of the Benzene Rings and Pyridine Rings via Direct Oxidative Cross-Dehydrogenative Coupling with Acetonitrile. Org Lett 2022; 24:2030-2034. [PMID: 35261234 DOI: 10.1021/acs.orglett.2c00498] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel and efficient approach for the amine-directed dehydrogenative C(sp2)-C(sp3) coupling of arylamines with acetonitrile was reported by using FeCl2 as the catalyst. Substituted anilines, aminopyridines, naphthylamines, and some nitrogen-containing heterocyclic arylamines react with inactive acetonitrile to form the corresponding arylacetonitriles in moderate to good yields. This protocol features nontoxic iron catalysis, efficient atom economy, nonprefunctionalized starting materials, good regioselectivity, and excellent compatibility of functional groups and aromatic rings, providing a novel, straightforward, and green approach toward arylacetonitriles.
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Affiliation(s)
- Hua Yao
- College of Chemistry, Nanchang University, Nanchang 330031, PR China
| | - Xiaoyang Zhong
- College of Chemistry, Nanchang University, Nanchang 330031, PR China
| | - Bingqing Wang
- College of Chemistry, Nanchang University, Nanchang 330031, PR China
| | - Sen Lin
- College of Chemistry, Nanchang University, Nanchang 330031, PR China
| | - Zhaohua Yan
- College of Chemistry, Nanchang University, Nanchang 330031, PR China
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11
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Zhang JQ, Liu J, Hu D, Song J, Zhu G, Ren H. Rapid and Simple Access to α-(Hetero)arylacetonitriles from Gem-Difluoroalkenes. Org Lett 2022; 24:786-790. [PMID: 34989584 DOI: 10.1021/acs.orglett.1c04336] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A scalable cyanation of gem-difluoroalkenes to (hetero)arylacetonitrile derivatives was developed. This strategy features mild reaction conditions, excellent yields, wide substrate scope, and broad functional group tolerance. Significantly, in this reaction, aqueous ammonia offers a "N" source for the "CN" reagent and entirely avoids the use of toxic cyanating reagents or metal catalysis. Hence, we provide a green and alternative method for the synthesis of arylacetonitriles.
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Affiliation(s)
- Jun-Qi Zhang
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
| | - Jiayue Liu
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
| | - Dandan Hu
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
| | - Jinyu Song
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
| | - Guorong Zhu
- Zhejiang Tianyu Pharmaceutical Co., Lddd., Jiangkou Development Zone, Huangyan 318020, Zhejiang, P. R. China
| | - Hongjun Ren
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
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12
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Ru(III)-catalyzed construction of variously substituted quinolines from 2-aminoaromatic aldehydes (ketones) and isoxazoles: Isoxazoles as cyclization reagent and cyano sources. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.12.072] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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13
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Kim DP, Sharma BM, Nikam AV, Lahore S, Ahn GN. Cyanide-Free Cyanation of sp2 and sp-Carbons by Oxazole based Masked CN Source Using Flow Microreactors. Chemistry 2021; 28:e202103777. [PMID: 34963029 DOI: 10.1002/chem.202103777] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Indexed: 11/10/2022]
Abstract
We herein report a cyanide-free continuous-flow process for cyanation of sp 2 and sp carbons to synthesize aryl, vinyl and acetylenic nitriles from (5-methyl-2-phenyloxazol-4-yl) boronic acid [OxBA] reagent as a sole source of carbon-bound masked -CN source. Non-toxic and stable OxBA reagent is generated by lithiation-borylation of bromo-oxazole, and the consecutive Suzuki-Miyaura cross-coupling with aryl, vinyl, or acetylenic halides and demasking [4 + 2]/retro-[4 + 2] sequence were successfully accomplished to give the desired cyano compounds with reasonably good yields in a four-step flow manner. A unique feature of this cyanation protocol in flow enables to cyanate a variety of sp 2 and sp carbons to produce a broad spectrum of aryl acetonitrile. It is envisaged that the OxBA based cyanation would replace existing unstable and toxic approaches as well as non-toxic cyanation using two different sources of "C" and "N" to incorporate the -CN group.
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Affiliation(s)
- Dong-Pyo Kim
- Pohang University of Science and Technology, chemical engineering, san 31, Hyoja-dong, Nam-gu, 790-784, Pohang, KOREA, REPUBLIC OF
| | - Brijesh M Sharma
- Pohang Gonggwa Daehakgyo Sinsojae Gonghakgwa: Pohang University of Science and Technology Department of Materials Science and Engineering, Department of Chemical Engineering, KOREA, REPUBLIC OF
| | - Arun V Nikam
- Pohang Gonggwa Daehakgyo Sinsojae Gonghakgwa: Pohang University of Science and Technology Department of Materials Science and Engineering, Department of Chemical Engineering, KOREA, REPUBLIC OF
| | - Santosh Lahore
- Pohang Gonggwa Daehakgyo Sinsojae Gonghakgwa: Pohang University of Science and Technology Department of Materials Science and Engineering, Department of Chemical Engineering, KOREA, REPUBLIC OF
| | - Gwang-Noh Ahn
- Pohang Gonggwa Daehakgyo Sinsojae Gonghakgwa: Pohang University of Science and Technology Department of Materials Science and Engineering, Department of Chemical Engineering, KOREA, REPUBLIC OF
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14
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Pan C, Yang C, Li K, Zhang K, Zhu Y, Wu S, Zhou Y, Fan B. Photo-Promoted Decarboxylative Alkylation of α, β-Unsaturated Carboxylic Acids with ICH 2CN for the Synthesis of β, γ-Unsaturated Nitriles. Org Lett 2021; 23:7188-7193. [PMID: 34491073 DOI: 10.1021/acs.orglett.1c02585] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
An efficient, catalyst/photocatalyst-free, and cost-effective methodology for the decarboxylative alkylation of α,β-unsaturated carboxylic acids to synthesize β,γ-unsaturated nitriles has been developed. The reaction proceeded in an environmentally benign atmosphere of blue light-emitting diode irradiation with K2CO3 and water at room temperature. The methodology worked for a wide range of substrates (22 examples) with up to 83% yield. The protocol is also compatible for gram-scale synthesis.
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Affiliation(s)
- Chunxiang Pan
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, Yuehua Street, Kunming 650500, China
| | - Chunhui Yang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, Yuehua Street, Kunming 650500, China
| | - Kangkui Li
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, Yuehua Street, Kunming 650500, China
| | - Keyang Zhang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, Yuehua Street, Kunming 650500, China
| | - Yuanbin Zhu
- Yunnan Tiefeng High Tech Mining Chemicals Co. Ltd, Qingfeng Industrial Park, Lufeng 651200, Yunnan Province China
| | - Shiyuan Wu
- Yunnan Tiefeng High Tech Mining Chemicals Co. Ltd, Qingfeng Industrial Park, Lufeng 651200, Yunnan Province China
| | - Yongyun Zhou
- Key Laboratory of Advanced Synthetic Chemistry, Yunnan Minzu University, Yuehua Street, Kunming 650500, China
| | - Baomin Fan
- Key Laboratory of Advanced Synthetic Chemistry, Yunnan Minzu University, Yuehua Street, Kunming 650500, China
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15
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De Bonfils P, Verron E, Nun P, Coeffard V. Photoinduced Storage and Thermal Release of Singlet Oxygen from 1,2‐Dihydropyridine Endoperoxides. CHEMPHOTOCHEM 2021. [DOI: 10.1002/cptc.202100047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Paul De Bonfils
- CEISAM UMR CNRS 6230 Université de Nantes 44000 Nantes France
| | - Elise Verron
- CEISAM UMR CNRS 6230 Université de Nantes 44000 Nantes France
| | - Pierrick Nun
- CEISAM UMR CNRS 6230 Université de Nantes 44000 Nantes France
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16
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Iodine(III) promotes cross-dehydrogenative coupling of N-hydroxyphthalimide and unactivated C(sp 3)-H bonds. Commun Chem 2021; 4:46. [PMID: 36697770 PMCID: PMC9814821 DOI: 10.1038/s42004-021-00480-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 02/26/2021] [Indexed: 01/28/2023] Open
Abstract
Cross-dehydrogenative coupling reactions provide a method to construct new chemical bonds by direct C-H activation without any pre-functionalization. Compared to functionalization of a C-H bond α- to ether oxygen, α- to carbonyl, or at a benzylic position, functionalization of unactivated hydrocarbons is difficult and often requires high temperatures, a transition-metal catalyst, or a superstoichiometric quantity of volatile, toxic, and explosive tert-butylhydroperoxide. Here, a cross-dehydrogenative C-O coupling reaction of N-hydroxyphthalimide with unactivated alkanes, nitriles, ethers, and thioethers has been realized by using iodobenzene diacetate as the radical initiator. The current protocol enables efficient functionalization of unactivated hydrocarbons and nitriles through inert C(sp3)-H bond activation under mild reaction conditions. O-substituted NHPI derivatives are generated in good yields under metal-free conditions.
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17
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Chen Y, Xu L, Jiang Y, Ma D. Assembly of α-(Hetero)aryl Nitriles via Copper-Catalyzed Coupling Reactions with (Hetero)aryl Chlorides and Bromides. Angew Chem Int Ed Engl 2021; 60:7082-7086. [PMID: 33372348 DOI: 10.1002/anie.202014638] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Indexed: 11/05/2022]
Abstract
α-(Hetero)aryl nitriles are important structural motifs for pharmaceutical design. The known methods for direct synthesis of these compounds via coupling with (hetero)aryl halides suffer from narrow reaction scope. Herein, we report that the combination of copper salts and oxalic diamides enables the coupling of a variety of (hetero)aryl halides (Cl, Br) and ethyl cyanoacetate under mild conditions, affording α-(hetero)arylacetonitriles via one-pot decarboxylation. Additionally, the CuBr/oxalic diamide catalyzed coupling of (hetero)aryl bromides with α-alkyl-substituted ethyl cyanoacetates proceeds smoothly at 60 °C, leading to the formation of α-alkyl (hetero)arylacetonitriles after decarboxylation. The method features a general substrate scope and is compatible with various functionalities and heteroaryls.
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Affiliation(s)
- Ying Chen
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai, 201210, China
| | - Lanting Xu
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Yongwen Jiang
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Dawei Ma
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
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18
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Chen Y, Xu L, Jiang Y, Ma D. Assembly of α‐(Hetero)aryl Nitriles via Copper‐Catalyzed Coupling Reactions with (Hetero)aryl Chlorides and Bromides. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014638] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ying Chen
- School of Physical Science and Technology ShanghaiTech University 393 Middle Huaxia Road Shanghai 201210 China
| | - Lanting Xu
- State Key Laboratory of Bioorganic & Natural Products Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Yongwen Jiang
- State Key Laboratory of Bioorganic & Natural Products Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Dawei Ma
- State Key Laboratory of Bioorganic & Natural Products Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
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19
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Eşsiz S. A computational study for the reaction mechanism of metal-free cyanomethylation of aryl alkynoates with acetonitrile. RSC Adv 2021; 11:18246-18251. [PMID: 35480900 PMCID: PMC9033414 DOI: 10.1039/d1ra01649k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 05/12/2021] [Indexed: 12/04/2022] Open
Abstract
A computational study of metal-free cyanomethylation and cyclization of aryl alkynoates with acetonitrile is carried out employing density functional theory and high-level coupled-cluster methods, such as coupled-cluster singles and doubles with perturbative triples [CCSD(T)]. Our results indicate that the reaction of aryl alkynoates with acetonitrile in the presence of tert-butyl peroxybenzoate (TBPB) under metal-free conditions tends to proceed through cyanomethylation, spirocyclization and ester migration of the kinetically favoured coumarin derivatives. 1,2-Ester migration in the spiro-radical intermediate 10 does not proceed via the formation of the carboxyl radical 11 suggested by Sun and co-workers. Our results also demonstrate that the t-butoxy radical is substantially responsible the formation of the cyanomethyl radical by the abstraction of a hydrogen atom from acetonitrile. A computational study of metal-free cyanomethylation and cyclization of aryl alkynoates with acetonitrile is carried out employing density functional theory and high-level coupled-cluster methods, such as [CCSD(T)].![]()
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Affiliation(s)
- Selçuk Eşsiz
- Department of Chemistry
- Faculty of Science
- Atatürk University
- Erzurum 25240
- Turkey
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20
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Wu J, Liu J, Zhou K, He Z, Wang Q, Wu F, Miao T, Qian J, Shi Q. Efficient construction of diverse 3-cyanoindoles under novel tandem catalysis. Chem Commun (Camb) 2020; 56:12660-12663. [PMID: 32966377 DOI: 10.1039/d0cc05439a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A novel and rapid construction of 3-cyanoindoles by palladium-catalyzed tandem reactions has been developed. "N-H" free unprotected, N-alkyl and N-aryl 3-cyanoindoles are obtained with good to excellent yields. The usefulness of this synthetic approach is further demonstrated by the successful synthesis of practical compounds such as the therapeutic estrogen receptor ligand A precursor. Mechanism study shows that the tandem catalysis exploits a Suzuki cross-coupling with subsequent base-induced isoxazole fragmentation, followed by the aldimine condensation.
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Affiliation(s)
- Jun Wu
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, P. R. China.
| | - Jiabin Liu
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, P. R. China.
| | - Kerui Zhou
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, P. R. China.
| | - Zhenni He
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, P. R. China.
| | - Qian Wang
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, P. R. China.
| | - Fen Wu
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, P. R. China.
| | - Tingting Miao
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, P. R. China.
| | - Jinjie Qian
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, P. R. China.
| | - Qian Shi
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, P. R. China.
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21
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Morita T, Fuse S, Nakamura H. Photochemical Conversion of Isoxazoles to 5-Hydroxyimidazolines. Org Lett 2020; 22:3460-3463. [PMID: 32286839 DOI: 10.1021/acs.orglett.0c00910] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Photochemical conversion of isoxazole I to 5-hydroxyimidazoline VII proceeded via the trapping of the photogenerated acylazirine III with amines under UV light irradiation. This is the first report of the efficient synthesis of 5-hydroxyimidazolines that are not readily accessible by other means. 5-Hydroxyimidazolines were also converted into multisubstituted imidazoles in one step by treatment with trifluoroacetic anhydride (TFAA) and 2,6-lutidine in dichloromethane.
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Affiliation(s)
- Taiki Morita
- School of Life Science and Technology, Tokyo Institute of Technology, Yokohama 226-8503, Japan.,Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8503, Japan
| | - Shinichiro Fuse
- School of Life Science and Technology, Tokyo Institute of Technology, Yokohama 226-8503, Japan.,Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8503, Japan
| | - Hiroyuki Nakamura
- School of Life Science and Technology, Tokyo Institute of Technology, Yokohama 226-8503, Japan.,Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8503, Japan
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22
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Tolstikova LL, Shainyan BA. N,N-Bis(cyanomethyl)trifluoromethanesulfonamide. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2020. [DOI: 10.1134/s1070428020040235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Chen G, Li B, Hu B, Zhang X, Fan X. FeCl3-catalyzed C-3 functionalization of imidazo[1,2-a]pyridines with diazoacetonitrile under oxidant- and ligand-free conditions. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151774] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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24
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Harrison JR, Sarkar S, Hampton S, Riley J, Stojanovski L, Sahlberg C, Appelqvist P, Erath J, Mathan V, Rodriguez A, Kaiser M, Pacanowska DG, Read KD, Johansson NG, Gilbert IH. Discovery and Optimization of a Compound Series Active against Trypanosoma cruzi, the Causative Agent of Chagas Disease. J Med Chem 2020; 63:3066-3089. [PMID: 32134269 DOI: 10.1021/acs.jmedchem.9b01852] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Chagas disease is caused by the protozoan parasite Trypanosoma cruzi. It is endemic in South and Central America and recently has been found in other parts of the world, due to migration of chronically infected patients. The current treatment for Chagas disease is not satisfactory, and there is a need for new treatments. In this work, we describe the optimization of a hit compound resulting from the phenotypic screen of a library of compounds against T. cruzi. The compound series was optimized to the level where it had satisfactory pharmacokinetics to allow an efficacy study in a mouse model of Chagas disease. We were able to demonstrate efficacy in this model, although further work is required to improve the potency and selectivity of this series.
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Affiliation(s)
- Justin R Harrison
- Drug Discovery Unit, Division of Biological Chemistry and Drug Discovery, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Sandipan Sarkar
- Syngene International Ltd, Biocon Park, SEZ, Bommasandra Industrial Area, Phase-IV, Bommasandra-Jigani Link Road, Bangalore 560 099, India
| | - Shahienaz Hampton
- Drug Discovery Unit, Division of Biological Chemistry and Drug Discovery, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Jennifer Riley
- Drug Discovery Unit, Division of Biological Chemistry and Drug Discovery, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Laste Stojanovski
- Drug Discovery Unit, Division of Biological Chemistry and Drug Discovery, University of Dundee, Dundee DD1 5EH, United Kingdom
| | | | | | - Jessey Erath
- New York University School of Medicine, 430 East 29th Street, Alexandria Center West Tower, Room 511, Lab 524, New York, New York 10010, United States
| | - Vinodhini Mathan
- Syngene International Ltd, Biocon Park, SEZ, Bommasandra Industrial Area, Phase-IV, Bommasandra-Jigani Link Road, Bangalore 560 099, India
| | - Ana Rodriguez
- New York University School of Medicine, 430 East 29th Street, Alexandria Center West Tower, Room 511, Lab 524, New York, New York 10010, United States
| | - Marcel Kaiser
- Swiss Tropical and Public Health Institute (Swiss TPH), Socinstrasse 57, Basel CH-4051, Switzerland.,University of Basel, Petersplatz 1, Basel CH-4003, Switzerland
| | - Dolores Gonzalez Pacanowska
- Instituto de Parasitología y Biomedicina "López-Neyra", Avda. Conocimiento S/N, Parque Tecnológico Ciencias de la Salud18016 Armilla, Granada Spain
| | - Kevin D Read
- Drug Discovery Unit, Division of Biological Chemistry and Drug Discovery, University of Dundee, Dundee DD1 5EH, United Kingdom
| | | | - Ian H Gilbert
- Drug Discovery Unit, Division of Biological Chemistry and Drug Discovery, University of Dundee, Dundee DD1 5EH, United Kingdom
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25
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Kannan M, Muthaiah S. Extending the Chemistry of Hexamethylenetetramine in Ruthenium-Catalyzed Amine Oxidation. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00399] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Muthukumar Kannan
- National Institute of Technology Kurukshetra, Kurukshetra 136119, Haryana, India
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26
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Wang D, Lu B, Song YL, Sun HM, Shen Q. Fe(III)-catalyzed oxidative coupling of alkylnitriles with aromatic carboxylic acids: Facile access to cyanomethyl esters. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.150969] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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27
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Donald JR, Berrell SL. Radical cyanomethylation via vinyl azide cascade-fragmentation. Chem Sci 2019; 10:5832-5836. [PMID: 31293772 PMCID: PMC6568274 DOI: 10.1039/c9sc01370a] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 05/04/2019] [Indexed: 12/17/2022] Open
Abstract
Herein, a novel methodology for radical cyanomethylation is described. The process is initiated by radical addition to the vinyl azide reagent 3-azido-2-methylbut-3-en-2-ol which triggers a cascade-fragmentation mechanism driven by the loss of dinitrogen and the stabilised 2-hydroxypropyl radical, ultimately effecting cyanomethylation. Cyanomethyl groups can be efficiently introduced into a range of substrates via trapping of α-carbonyl, heterobenzylic, alkyl, sulfonyl and aryl radicals, generated from a variety of functional groups under both photoredox catalysis and non-catalytic conditions. The value of this approach is exemplified by the late-stage cyanomethylation of pharmaceuticals.
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Affiliation(s)
- James R Donald
- Department of Chemistry , University of York , Heslington , York , YO10 5DD , UK .
| | - Sophie L Berrell
- Department of Chemistry , University of York , Heslington , York , YO10 5DD , UK .
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28
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Wang X, Makha M, Chen SW, Zheng H, Li Y. GaCl3-Catalyzed C–H Cyanation of Indoles with N-Cyanosuccinimide. J Org Chem 2019; 84:6199-6206. [DOI: 10.1021/acs.joc.9b00416] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Xue Wang
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100 P. R. China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Mohamed Makha
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Shu-Wei Chen
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100 P. R. China
| | - Huaiji Zheng
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100 P. R. China
| | - Yuehui Li
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou 730000, P. R. China
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29
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Kornfilt DJP, MacMillan DWC. Copper-Catalyzed Trifluoromethylation of Alkyl Bromides. J Am Chem Soc 2019; 141:6853-6858. [PMID: 30983333 DOI: 10.1021/jacs.9b03024] [Citation(s) in RCA: 99] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Copper oxidative addition into organohalides is a challenging two-electron process. In contrast, formal oxidative addition of copper to Csp2 carbon-bromine bonds can be accomplished by employing latent silyl radicals under photoredox conditions. This novel paradigm for copper oxidative addition has now been applied to a Cu-catalyzed cross-coupling of Csp3-bromides. Specifically, a copper/photoredox dual catalytic system for the coupling of alkyl bromides with trifluoromethyl groups is presented. This operationally simple and robust protocol successfully converts a variety of alkyl, allyl, benzyl, and heterobenzyl bromides into the corresponding alkyl trifluoromethanes.
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Affiliation(s)
- David J P Kornfilt
- Merck Center for Catalysis at Princeton University , Princeton , New Jersey 08544 , United States
| | - David W C MacMillan
- Merck Center for Catalysis at Princeton University , Princeton , New Jersey 08544 , United States
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30
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Chen P, Zhang QQ, Guo J, Chen LL, Wang YB, Zhang X. An effective preparation of both 1,3-diketones and nitriles from alkynones with oximes as hydroxide sources. Org Biomol Chem 2019; 16:8336-8344. [PMID: 30206631 DOI: 10.1039/c8ob01861h] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An effective phosphine-catalyzed protocol has been established for the syntheses of 1,3-diketones and nitriles from alkynones with oximes as hydroxide surrogates. This method features the use of a phosphine catalyst, compatibility with various functional groups and ambient temperature, which makes this approach very practical. A plausible mechanism was proposed.
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Affiliation(s)
- Pei Chen
- Institute of Functional Organic Molecular Engineering, Henan Engineering Laboratory of Flame-Retardant and Functional Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China.
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31
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Lu GP, Lin YM. A Base-Induced Ring-Opening Process of 2-Substituted-1,3,4-Oxadiazoles for the Generation of Nitriles at Room Temperature. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/174751914x14007780679741] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Guo-ping Lu
- College of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiaoling Wei, Nanjing 210094, P.R. China
| | - Ya-mei Lin
- College of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiaoling Wei, Nanjing 210094, P.R. China
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32
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Dutta I, Yadav S, Sarbajna A, De S, Hölscher M, Leitner W, Bera JK. Double Dehydrogenation of Primary Amines to Nitriles by a Ruthenium Complex Featuring Pyrazole Functionality. J Am Chem Soc 2018; 140:8662-8666. [DOI: 10.1021/jacs.8b05009] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Indranil Dutta
- Department of Chemistry and Center for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Sudhir Yadav
- Department of Chemistry and Center for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Abir Sarbajna
- Department of Chemistry and Center for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Subhabrata De
- Department of Chemistry and Center for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Markus Hölscher
- Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringerweg 2, 52074 Aachen, Germany
| | - Walter Leitner
- Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringerweg 2, 52074 Aachen, Germany
- Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Jitendra K. Bera
- Department of Chemistry and Center for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
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33
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Condition‐Based Selective Synthesis of 3,4,5‐Trisubstituted Isoxazoline N
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oxides, 4,5‐Dihydroisoxazoles and Isoxazoles. ChemistrySelect 2018. [DOI: 10.1002/slct.201800839] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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34
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Ray R, Hazari AS, Lahiri GK, Maiti D. Ruthenium-Catalyzed Aerobic Oxidation of Amines. Chem Asian J 2018; 13:2138-2148. [PMID: 29345861 DOI: 10.1002/asia.201701748] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Indexed: 11/09/2022]
Abstract
Amine oxidation is one of the fundamental reactions in organic synthesis as it leads to a variety of value-added products such as oximes, nitriles, imines, and amides among many others. These products comprise the key N-containing building blocks in the modern chemical industry, and such transformations, when achieved in the presence of molecular oxygen without using stoichiometric oxidants, are much preferred as they circumvent the production of unwanted wastes. In parallel, the versatility of ruthenium catalysts in various oxidative transformations is well-documented. Herein, this review focuses on aerobic oxidation of amines specifically by using ruthenium catalysts and highlights the major achievements in this direction and challenges that still need to be addressed.
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Affiliation(s)
- Ritwika Ray
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India
| | - Arijit Singha Hazari
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India
| | - Goutam Kumar Lahiri
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India
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35
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Okamoto K, Nanya A, Eguchi A, Ohe K. Asymmetric Synthesis of 2H
-Azirines with a Tetrasubstituted Stereocenter by Enantioselective Ring Contraction of Isoxazoles. Angew Chem Int Ed Engl 2017; 57:1039-1043. [DOI: 10.1002/anie.201710920] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Indexed: 12/14/2022]
Affiliation(s)
- Kazuhiro Okamoto
- Department of Energy and Hydrocarbon Chemistry; Graduate School of Engineering; Kyoto University; Katsura Nishikyo-ku Kyoto 615-8510 Japan
| | - Atsushi Nanya
- Department of Energy and Hydrocarbon Chemistry; Graduate School of Engineering; Kyoto University; Katsura Nishikyo-ku Kyoto 615-8510 Japan
| | - Akira Eguchi
- Department of Energy and Hydrocarbon Chemistry; Graduate School of Engineering; Kyoto University; Katsura Nishikyo-ku Kyoto 615-8510 Japan
| | - Kouichi Ohe
- Department of Energy and Hydrocarbon Chemistry; Graduate School of Engineering; Kyoto University; Katsura Nishikyo-ku Kyoto 615-8510 Japan
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36
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Okamoto K, Nanya A, Eguchi A, Ohe K. Asymmetric Synthesis of 2H
-Azirines with a Tetrasubstituted Stereocenter by Enantioselective Ring Contraction of Isoxazoles. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201710920] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Kazuhiro Okamoto
- Department of Energy and Hydrocarbon Chemistry; Graduate School of Engineering; Kyoto University; Katsura Nishikyo-ku Kyoto 615-8510 Japan
| | - Atsushi Nanya
- Department of Energy and Hydrocarbon Chemistry; Graduate School of Engineering; Kyoto University; Katsura Nishikyo-ku Kyoto 615-8510 Japan
| | - Akira Eguchi
- Department of Energy and Hydrocarbon Chemistry; Graduate School of Engineering; Kyoto University; Katsura Nishikyo-ku Kyoto 615-8510 Japan
| | - Kouichi Ohe
- Department of Energy and Hydrocarbon Chemistry; Graduate School of Engineering; Kyoto University; Katsura Nishikyo-ku Kyoto 615-8510 Japan
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37
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Lindsay-Scott PJ, Gallagher PT. Synthesis of heterocycles from arylacetonitriles: Powerful tools for medicinal chemists. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.05.089] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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38
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Su H, Wang L, Rao H, Xu H. Iron-Catalyzed Dehydrogenative sp3–sp2 Coupling via Direct Oxidative C–H Activation of Acetonitrile. Org Lett 2017; 19:2226-2229. [DOI: 10.1021/acs.orglett.7b00678] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Huimin Su
- Department
of Chemistry, Capital Normal University, Beijing 100048, P. R. China
| | - Luyao Wang
- Department
of Chemistry, Capital Normal University, Beijing 100048, P. R. China
| | - Honghua Rao
- Department
of Chemistry, Capital Normal University, Beijing 100048, P. R. China
- Key
Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology
(Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Hao Xu
- College
of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
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39
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Chen S, Li DY, Jiang LL, Liu K, Liu PN. Copper-Catalyzed Cascade Transformation of Homopropargyl Azides into Trifluoromethylated Nitriles via C–C Cleavage. Org Lett 2017; 19:2014-2017. [DOI: 10.1021/acs.orglett.7b00571] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Shuang Chen
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Lab for Advanced Materials and School of Chemistry & Molecular Engineering, East China University of Science & Technology, Meilong Road 130, Shanghai 200237, China
| | - Deng-Yuan Li
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Lab for Advanced Materials and School of Chemistry & Molecular Engineering, East China University of Science & Technology, Meilong Road 130, Shanghai 200237, China
| | - Liang-Liang Jiang
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Lab for Advanced Materials and School of Chemistry & Molecular Engineering, East China University of Science & Technology, Meilong Road 130, Shanghai 200237, China
| | - Kai Liu
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Lab for Advanced Materials and School of Chemistry & Molecular Engineering, East China University of Science & Technology, Meilong Road 130, Shanghai 200237, China
| | - Pei-Nian Liu
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Lab for Advanced Materials and School of Chemistry & Molecular Engineering, East China University of Science & Technology, Meilong Road 130, Shanghai 200237, China
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40
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Goswami P, Singh G, Vijaya Anand R. N-Heterocyclic Carbene Catalyzed 1,6-Conjugate Addition of Me3Si-CN to para-Quinone Methides and Fuchsones: Access to α-Arylated Nitriles. Org Lett 2017; 19:1982-1985. [DOI: 10.1021/acs.orglett.7b00508] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Prithwish Goswami
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S. A. S. Nagar, Manauli (PO), Punjab - 140306, India
| | - Gurdeep Singh
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S. A. S. Nagar, Manauli (PO), Punjab - 140306, India
| | - Ramasamy Vijaya Anand
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S. A. S. Nagar, Manauli (PO), Punjab - 140306, India
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41
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Shang L, Chang Y, Luo F, He JN, Huang X, Zhang L, Kong L, Li K, Peng B. Redox-Neutral α-Arylation of Alkyl Nitriles with Aryl Sulfoxides: A Rapid Electrophilic Rearrangement. J Am Chem Soc 2017; 139:4211-4217. [DOI: 10.1021/jacs.7b00969] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Li Shang
- Department
of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Yonghui Chang
- College of
Chemistry and Chemical Engineering, Hainan Normal University, 99
Longkunnan Road, Haikou, 571158, China
| | - Fan Luo
- Department
of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Jia-Ni He
- Department
of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Xin Huang
- Department
of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Lei Zhang
- Department
of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Lichun Kong
- Department
of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Kaixiao Li
- Department
of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Bo Peng
- Department
of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
- State
Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China
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42
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Wada E, Takeuchi T, Fujimura Y, Tyagi A, Kato T, Yoshida H. Direct cyanomethylation of aliphatic and aromatic hydrocarbons with acetonitrile over a metal loaded titanium oxide photocatalyst. Catal Sci Technol 2017. [DOI: 10.1039/c7cy00365j] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The direct cyanomethylation of aliphatic hydrocarbons proceeds with a Pt/TiO2 photocatalyst, while that of benzene requires a Pd/TiO2 hybrid catalyst.
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Affiliation(s)
- Emiko Wada
- Graduate School of Human and Environmental Studies
- Kyoto University
- Kyoto 606-8501
- Japan
- Research Fellow of the Japan Society for the Promotion of Science
| | - Tomoaki Takeuchi
- Graduate School of Human and Environmental Studies
- Kyoto University
- Kyoto 606-8501
- Japan
| | - Yuki Fujimura
- Department of Applied Chemistry
- Graduate School of Engineering
- Nagoya University
- Nagoya
- Japan
| | - Akanksha Tyagi
- Graduate School of Human and Environmental Studies
- Kyoto University
- Kyoto 606-8501
- Japan
| | - Tatsuhisa Kato
- Graduate School of Human and Environmental Studies
- Kyoto University
- Kyoto 606-8501
- Japan
- Institute for Liberal Arts and Science
| | - Hisao Yoshida
- Graduate School of Human and Environmental Studies
- Kyoto University
- Kyoto 606-8501
- Japan
- Elemental Strategy Initiative for Catalysts and Batteries (ESICB)
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43
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Jiao Z, Chee KW, Zhou J“S. Palladium-Catalyzed Asymmetric α-Arylation of Alkylnitriles. J Am Chem Soc 2016; 138:16240-16243. [DOI: 10.1021/jacs.6b11610] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Zhiwei Jiao
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Kwok Wei Chee
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Jianrong “Steve” Zhou
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
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44
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Morita T, Fuse S, Nakamura H. Generation of an 4-Isoxazolyl Anion Species: Facile Access to Multifunctionalized Isoxazoles. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608039] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Taiki Morita
- Laboratory for Chemistry and Life Science Institute of Innovative Research; Tokyo Institute of Technology; 4259 Nagatsuta-cho, Midori-ku Yokohama 226-8503 Japan
| | - Shinichiro Fuse
- Laboratory for Chemistry and Life Science Institute of Innovative Research; Tokyo Institute of Technology; 4259 Nagatsuta-cho, Midori-ku Yokohama 226-8503 Japan
| | - Hiroyuki Nakamura
- Laboratory for Chemistry and Life Science Institute of Innovative Research; Tokyo Institute of Technology; 4259 Nagatsuta-cho, Midori-ku Yokohama 226-8503 Japan
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45
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Morita T, Fuse S, Nakamura H. Generation of an 4-Isoxazolyl Anion Species: Facile Access to Multifunctionalized Isoxazoles. Angew Chem Int Ed Engl 2016; 55:13580-13584. [DOI: 10.1002/anie.201608039] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Taiki Morita
- Laboratory for Chemistry and Life Science Institute of Innovative Research; Tokyo Institute of Technology; 4259 Nagatsuta-cho, Midori-ku Yokohama 226-8503 Japan
| | - Shinichiro Fuse
- Laboratory for Chemistry and Life Science Institute of Innovative Research; Tokyo Institute of Technology; 4259 Nagatsuta-cho, Midori-ku Yokohama 226-8503 Japan
| | - Hiroyuki Nakamura
- Laboratory for Chemistry and Life Science Institute of Innovative Research; Tokyo Institute of Technology; 4259 Nagatsuta-cho, Midori-ku Yokohama 226-8503 Japan
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46
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Zhang W, Yang S, Shen Z. Copper-Catalyzed Cyanomethylation of Substituted Tetrahydroisoquinolines with Acetonitrile. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600050] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Wei Zhang
- School of Chemistry and Chemical Engineering; Shanghai Jiao Tong University; 800 Dongchuan Road Shanghai 200240 People's Republic of China
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials; Shanghai Normal University; Shanghai 200234 People's Republic of China
| | - Shiping Yang
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials; Shanghai Normal University; Shanghai 200234 People's Republic of China
| | - Zengming Shen
- School of Chemistry and Chemical Engineering; Shanghai Jiao Tong University; 800 Dongchuan Road Shanghai 200240 People's Republic of China
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47
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Zhou W, Zheng S, Schultz JW, Rath NP, Mirica LM. Aromatic Cyanoalkylation through Double C–H Activation Mediated by Ni(III). J Am Chem Soc 2016; 138:5777-80. [DOI: 10.1021/jacs.6b02405] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wen Zhou
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130-4899, United States
| | - Shuai Zheng
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130-4899, United States
| | - Jason W. Schultz
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130-4899, United States
| | - Nigam P. Rath
- Department
of Chemistry and Biochemistry, University of Missouri—St. Louis, St.
Louis, Missouri 63121-4400, United States
| | - Liviu M. Mirica
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130-4899, United States
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48
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Tu KN, Hirner JJ, Blum SA. Oxyboration with and without a Catalyst: Borylated Isoxazoles via B-O σ-Bond Addition. Org Lett 2016; 18:480-3. [PMID: 26771389 PMCID: PMC4763986 DOI: 10.1021/acs.orglett.5b03530] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Herein
we report an oxyboration reaction with activated substrates
that employs B–O σ bond additions to C–C π
bonds to form borylated isoxazoles, which are potential building blocks
for drug discovery. Although this reaction can be effectively catalyzed
by gold, it is the first example of uncatalyzed oxyboration of C–C
π bonds by B–O σ bonds—and only the second
example that is catalyzed. This oxyboration reaction is tolerant of
groups incompatible with alternative lithiation/borylation and palladium-catalyzed
C–H activation/borylation technologies for the synthesis of
borylated isoxazoles.
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Affiliation(s)
- Kim N Tu
- Department of Chemistry, University of California-Irvine , Irvine, California 92697-2025, United States
| | - Joshua J Hirner
- Department of Chemistry, University of California-Irvine , Irvine, California 92697-2025, United States
| | - Suzanne A Blum
- Department of Chemistry, University of California-Irvine , Irvine, California 92697-2025, United States
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49
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Liu Y, Yang K, Ge H. Palladium-catalyzed ligand-promoted site-selective cyanomethylation of unactivated C(sp 3)-H bonds with acetonitrile. Chem Sci 2016; 7:2804-2808. [PMID: 28660057 PMCID: PMC5477045 DOI: 10.1039/c5sc04066c] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Accepted: 01/06/2016] [Indexed: 12/20/2022] Open
Abstract
The direct coupling of unactivated sp3 C–H bonds in aliphatic amides with acetonitrile was achieved via palladium catalysis.
The direct cyanomethylation of unactivated sp3 C–H bonds of aliphatic amides was achieved via palladium catalysis assisted by a bidentate directing group with good functional group compatibility. This process represents the first example of the direct cross-coupling of sp3 C–H bonds with acetonitrile. Considering the importance of the cyano group in medicinal and synthetic organic chemistry, this reaction will find broad application in chemical research.
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Affiliation(s)
- Yongbing Liu
- Department of Chemistry and Chemical Biology , Indiana University-Purdue University Indianapolis , Indianapolis , Indiana 46202 , USA .
| | - Ke Yang
- Department of Chemistry and Chemical Biology , Indiana University-Purdue University Indianapolis , Indianapolis , Indiana 46202 , USA . .,Institute of Chemistry and BioMedical Sciences , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , P. R. China
| | - Haibo Ge
- Department of Chemistry and Chemical Biology , Indiana University-Purdue University Indianapolis , Indianapolis , Indiana 46202 , USA .
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50
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Gao B, Xie Y, Yang L, Huang H. Copper-catalyzed decarboxylative cross-coupling of cinnamic acids and ACCN via single electron transfer. Org Biomol Chem 2016; 14:2399-402. [DOI: 10.1039/c5ob02677f] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel and convenient method for the synthesis of β,γ-unsaturated nitriles using ACCN (1,1′-azobis(cyclohexane-1-carbonitrile)) as a cyano source was described.
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Affiliation(s)
- Bao Gao
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou 730000
- China
| | - Yinjun Xie
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou 730000
- China
| | - Lei Yang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou 730000
- China
| | - Hanmin Huang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou 730000
- China
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