1
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Chau TK, Ho NT, Ho TH, Nguyen AT, Nguyen KD, Phan NTS, Le HV, Nguyen TT. Synthesis of 2-benzyl benzoxazoles and benzothiazoles via elemental sulfur promoted cyclization of styrenes with 2-nitrophenols and N, N-dialkyl-3-nitroanilines. Org Biomol Chem 2024; 22:1234-1244. [PMID: 38240351 DOI: 10.1039/d3ob01775c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
Herein we report a method for affording 2-benzyl benzoxazoles from substituted styrenes and 2-nitrophenols. The success of this method relies on the use of simple reagents, namely elemental sulfur and DABCO. A combination of identical reagents was utilized for the annulation of styrenes with N,N-dialkyl-3-nitroanilines to afford 2-benzyl benzothiazoles. Overall, benzoxazoles and benzothiazoles bearing useful functionalities such as halogens, amines, and heterocyclic groups were isolated in moderate to good yields. Our methods are a rare example of divergent transformations of substituted nitroarenes towards 2-benzyl benzoxazoles and benzothiazoles.
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Affiliation(s)
- Truong K Chau
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam.
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Ho Chi Minh City, Vietnam
| | - Nguyen T Ho
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam.
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Ho Chi Minh City, Vietnam
| | - Tuan H Ho
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam.
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Ho Chi Minh City, Vietnam
| | - Anh T Nguyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam.
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Ho Chi Minh City, Vietnam
| | - Khoa D Nguyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam.
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Ho Chi Minh City, Vietnam
| | - Nam T S Phan
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam.
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Ho Chi Minh City, Vietnam
| | - Ha V Le
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam.
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Ho Chi Minh City, Vietnam
| | - Tung T Nguyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam.
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Ho Chi Minh City, Vietnam
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2
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Rosadoni E, Bombonato E, Del Vecchio A, Guariento S, Ronchi P, Bellina F. Direct Decarboxylative C-2 Alkylation of Azoles through Minisci-Type Coupling. J Org Chem 2023; 88:14236-14241. [PMID: 37729603 DOI: 10.1021/acs.joc.3c01625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/22/2023]
Abstract
This note discusses the application of a Minisci-type reaction for the direct alkylation of azoles with carboxylic acids as radical precursors. Different reaction conditions were investigated to achieve high yield of the desired products, focusing on acid strength and solvent screening. Moreover, the reactivity of imidazoles with various carboxylic acids was investigated, showing good yield for most cases. The study reveals the potential of this approach for late-stage functionalization in drug discovery.
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Affiliation(s)
- Elisabetta Rosadoni
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Moruzzi 13, 56124 Pisa, Italy
| | - Elena Bombonato
- Department of Chemistry "Giacomo Ciamician", Alma Mater Studiorum - University of Bologna, Via Selmi, 2, 40126 Bologna, Italy
| | - Antonio Del Vecchio
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Moruzzi 13, 56124 Pisa, Italy
| | - Sara Guariento
- Chemistry Research and Drug Design, Chiesi Farmaceutici S.p.A., Centro Ricerche, Largo Belloli 11/A, 43122 Parma, Italy
| | - Paolo Ronchi
- Chemistry Research and Drug Design, Chiesi Farmaceutici S.p.A., Centro Ricerche, Largo Belloli 11/A, 43122 Parma, Italy
| | - Fabio Bellina
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Moruzzi 13, 56124 Pisa, Italy
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3
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Duan YR, Wu HL, Gan HF. Synthesis of 2-Arylmethylbenzoxazoles by S8-Mediated Cyclization of 2-Aminophenols with Styrenes. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2022. [DOI: 10.1134/s1070428022100177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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4
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Shigehiro Y, Miya K, Shibai R, Kataoka Y, Ura Y. Synthesis of Pd-NNP Phosphoryl Mononuclear and Phosphinous Acid-Phosphoryl-Bridged Dinuclear Complexes and Ambient Light-Promoted Oxygenation of Benzyl Ligands. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuma Shigehiro
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science, Nara Women’s University, Kitauoyanishi-machi, Nara 630-8506, Japan
| | - Karen Miya
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science, Nara Women’s University, Kitauoyanishi-machi, Nara 630-8506, Japan
| | - Risa Shibai
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science, Nara Women’s University, Kitauoyanishi-machi, Nara 630-8506, Japan
| | - Yasutaka Kataoka
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science, Nara Women’s University, Kitauoyanishi-machi, Nara 630-8506, Japan
| | - Yasuyuki Ura
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science, Nara Women’s University, Kitauoyanishi-machi, Nara 630-8506, Japan
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5
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Tewari S, Mungalpara MN, Patel S, Rowlands GJ. The concise synthesis and resolution of planar chiral [2.2]paracyclophane oxazolines by C-H activation. RSC Adv 2022; 12:8588-8591. [PMID: 35424822 PMCID: PMC8984818 DOI: 10.1039/d2ra01075e] [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: 02/18/2022] [Accepted: 03/03/2022] [Indexed: 11/29/2022] Open
Abstract
Planar chiral [2.2]paracyclophanes are resolved through the direct C–H arylation of enantiopure oxazolines, providing a convenient route to ligands and chiral materials. Preliminary results show that hydrolysis followed by decarboxylative phosphorylation leads to enantiopure [2.2]paracyclophane derivatives that are otherwise challenging to prepare. Racemic bromo[2.2]paracyclophanes are directly transformed into enantiomerically pure planar chiral oxazolines in one step with simultaneous resolution of planar chirality.![]()
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Affiliation(s)
- Shashank Tewari
- School of Natural Sciences, Massey University Private Bag 11 222 Palmerston North 4442 New Zealand
| | - Maulik N Mungalpara
- School of Natural Sciences, Massey University Private Bag 11 222 Palmerston North 4442 New Zealand
| | - Suraj Patel
- School of Natural Sciences, Massey University Private Bag 11 222 Palmerston North 4442 New Zealand
| | - Gareth J Rowlands
- School of Natural Sciences, Massey University Private Bag 11 222 Palmerston North 4442 New Zealand
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6
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Xiao HX, Hsu WY, Liang SW, Guo Y, Lee WC, Lu IC, Chang YC. Bulky Di(1-adamantyl)phosphinous Acid-Ligated Pd(II) Precatalysts for Suzuki Reactions of Unreactive Aryl Chlorides. ACS OMEGA 2021; 6:35134-35143. [PMID: 34963994 PMCID: PMC8697604 DOI: 10.1021/acsomega.1c06430] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 11/25/2021] [Indexed: 06/14/2023]
Abstract
Di(1-adamantyl)phosphine oxide (SPO-Ad: Ad2P(V)(=O)H), a stable tautomer of di(1-adamantyl)phosphinous acid (PA-Ad: Ad2P(III)-OH), was employed to synthesize two new PA-Ad-coordinated complexes, POPd-Ad and POPd2-Ad. POPd-Ad was easily transformed from POPd2-Ad in acetonitrile, and the [M - H]- ion of the deprotonated POPd-Ad was observed in the electrospray ionization-mass spectrum of POPd2-Ad. Both complexes are effective precatalysts for the Suzuki reaction of aryl chlorides. The reduction of Pd(II) in POPd-Ad and POPd2-Ad by arylboronic acid was examined, and the ideal Pd-to-PA ratio in the Suzuki reaction was found to be 1:1. The effect of temperature on the catalytic yields was studied to examine the possible ligation state of the active species and the dimer-to-monomer process of POPd2-Ad. Mononuclear and mono-ligated Pd species was assumed to be catalytically active. The electronic and steric effects of PA-Ad were slightly better than those reported for PA-tBu ( t Bu2P(III)-OH). Density functional theory calculations were performed to evaluate the formation of mono-ligated and mononuclear Pd species from POPd-Ad and POPd2-Ad. Furthermore, the reaction time and catalyst loading could be reduced for the reported POPd1-tBu precatalyst using the optimized reaction conditions for POPd-Ad. The complexes synthesized in this extensive study will complement the existing SPO-coordinated POPd series of precatalysts.
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Affiliation(s)
- He-Xin Xiao
- Department
of Applied Chemistry, Providence University, 200, Sec. 7, Taiwan Boulevard, Shalu
Dist., Taichung City 43301, Taiwan
| | - Wan-Yun Hsu
- Department
of Applied Chemistry, Providence University, 200, Sec. 7, Taiwan Boulevard, Shalu
Dist., Taichung City 43301, Taiwan
| | - Siou-Wei Liang
- Department
of Applied Chemistry, Providence University, 200, Sec. 7, Taiwan Boulevard, Shalu
Dist., Taichung City 43301, Taiwan
| | - Yingjie Guo
- Department
of Cosmetic Science, Providence University, 200, Sec. 7, Taiwan Boulevard, Shalu
Dist., Taichung City 43301, Taiwan
| | - Wan-Ching Lee
- Department
of Chemistry, National Chung Hsing University, 145 Xingda Rd., South Dist., Taichung City40227, Taiwan
| | - I-Chung Lu
- Department
of Chemistry, National Chung Hsing University, 145 Xingda Rd., South Dist., Taichung City40227, Taiwan
| | - Yu-Chang Chang
- Department
of Applied Chemistry, Providence University, 200, Sec. 7, Taiwan Boulevard, Shalu
Dist., Taichung City 43301, Taiwan
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7
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Göbel D, Rusch P, Duvinage D, Stauch T, Bigall NC, Nachtsheim BJ. Substitution Effect on 2-(Oxazolinyl)-phenols and 1,2,5-Chalcogenadiazole -Annulated Derivatives: Emission-Color-Tunable, Minimalistic Excited-State Intramolecular Proton Transfer (ESIPT)-Based Luminophores. J Org Chem 2021; 86:14333-14355. [PMID: 34581564 DOI: 10.1021/acs.joc.1c00846] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Minimalistic 2-(oxazolinyl)-phenols substituted with different electron-donating and -withdrawing groups as well as 1,2,5-chalcogenadiazole-annulated derivatives thereof were synthesized and investigated in regard to their emission behavior in solution as well as in the solid state. Depending on the nature of the incorporated substituent and its position, emission efficiencies were increased or diminished, resulting in AIE or ACQ characteristics. Single-crystal analysis revealed J- and H-type packing motifs and a so-far undescribed isolation of ESIPT-based fluorophores in the keto form.
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Affiliation(s)
- Dominik Göbel
- Institute for Organic and Analytical Chemistry, University of Bremen, 28359 Bremen, Germany
| | - Pascal Rusch
- Leibniz Universität Hannover, Institute of Physical Chemistry and Electrochemistry, Callinstraße 3a, D-30167 Hannover, Germany.,Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering - Innovation Across Disciplines), D-30167 Hannover, Germany
| | - Daniel Duvinage
- Institute for Inorganic and Crystallographic Chemistry, University of Bremen, 28359 Bremen, Germany
| | - Tim Stauch
- Institute for Physical and Theoretical Chemistry, University of Bremen, Leobener Straße NW2, D-28359 Bremen, Germany.,Bremen Center for Computational Materials Science, University of Bremen, Am Fallturm 1, D-28359 Bremen, Germany.,MAPEX Center for Materials and Processes, University of Bremen, Bibliothekstraße 1, D-28359 Bremen, Germany
| | - Nadja-C Bigall
- Leibniz Universität Hannover, Institute of Physical Chemistry and Electrochemistry, Callinstraße 3a, D-30167 Hannover, Germany.,Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering - Innovation Across Disciplines), D-30167 Hannover, Germany
| | - Boris J Nachtsheim
- Institute for Organic and Analytical Chemistry, University of Bremen, 28359 Bremen, Germany
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8
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Basak S, Dutta S, Maiti D. Accessing C2-Functionalized 1,3-(Benz)azoles through Transition Metal-Catalyzed C-H Activation. Chemistry 2021; 27:10533-10557. [PMID: 33909304 DOI: 10.1002/chem.202100475] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Indexed: 12/22/2022]
Abstract
The skeletal presence of 1,3-azoles in a variety of bioactive natural products, pharmacophores, and organic materials demands the derivatization of such heteroarenes regioselectively. Plenty of cross-coupling as well as cyclocondensation reactions have been performed to build up these skeletons but remained commercially unrealizable. A couple of severe drawbacks are faced by these traditional protocols that require a more straightforward strategy to obviate them. Transition metal-catalyzed C-H functionalization has emerged as a superior alternative in that context. 1,3-Azoles and their benzo counterparts have been extensively functionalized exploiting both noble and earth-abundant transition metals. Lately, C-2 functionalization have gained much traction due to the ease of attaining high regioselectivity and installation of synthetically manipulative functionalities. This critical review presents a bird's eye view of all major C-2 functionalization of (benz)azoles catalyzed by a diverse set of metals performed over the past 15 years.
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Affiliation(s)
- Sumon Basak
- Department of Chemistry, Banaras Hindu University, Varanasi, UP, 221005, India
| | - Subhabrata Dutta
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, MH, 400076, India
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, MH, 400076, India
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9
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Akulov AA, Varaksin MV, Charushin VN, Chupakhin ON. C(sp2) – H functionalization of aldimines and related compounds: advances and prospects. RUSSIAN CHEMICAL REVIEWS 2021. [DOI: 10.1070/rcr4978] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This is the first systematic review of the most relevant approaches to direct C(sp2)–H bond functionalization of azomethine derivatives. The scope of the applicability of various transformations is analyzed. The review assesses prospects of the application of this functionalization strategy in the multistep synthesis of valuable compounds for use in medicinal chemistry, materials science and related areas.
The bibliography includes 124 references.
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10
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Piou T, Slutskyy Y, Kevin NJ, Sun Z, Xiao D, Kong J. Direct Arylation of Azoles Enabled by Pd/Cu Dual Catalysis. Org Lett 2021; 23:1996-2001. [PMID: 33667104 DOI: 10.1021/acs.orglett.1c00100] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A practical approach toward the synthesis of 2-arylazoles via direct arylation is described. The transformation relies on a Pd/Cu cocatalyst system that operates with low catalyst loadings. The reaction conditions were found to be tolerant of a wide range of functional groups and nitrogen-containing heterocycles commonly employed in a drug discovery setting.
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Affiliation(s)
- Tiffany Piou
- Department of Process Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Yuriy Slutskyy
- Department of Discovery Chemistry, Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Nancy J Kevin
- Department of Discovery Chemistry, Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Zhongxiang Sun
- Department of Discovery Chemistry, Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Dong Xiao
- Department of Discovery Chemistry, Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Jongrock Kong
- Department of Process Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
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11
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Akulov AA, Varaksin MV, Mampuys P, Charushin VN, Chupakhin ON, Maes BUW. C(sp 2)-H functionalization in non-aromatic azomethine-based heterocycles. Org Biomol Chem 2021; 19:297-312. [PMID: 33026389 DOI: 10.1039/d0ob01580f] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Direct C(sp2)-H functionalization of the endocyclic azomethine and aldonitrone moieties in non-aromatic azaheterocycles has established itself as a promising methodology over the last decade. Transition metal-catalyzed cross-coupling reactions, α-metalation-electrophile quenching protocols, and (metal-free) nucleophilic substitution of hydrogen reactions (SNH) are the major routes applied on cyclic imines and their derivatives. In this overview, we show the tangible progress made in this area during the period from 2008 to 2020.
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Affiliation(s)
- Alexey A Akulov
- Department of Organic & Biomolecular Chemistry, Ural Federal University, 19 Mira Str., 620002 Ekaterinburg, Russia.
| | - Mikhail V Varaksin
- Department of Organic & Biomolecular Chemistry, Ural Federal University, 19 Mira Str., 620002 Ekaterinburg, Russia. and Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 22 S. Kovalevskaya Str., 620990 Ekaterinburg, Russia
| | - Pieter Mampuys
- Division of Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium.
| | - Valery N Charushin
- Department of Organic & Biomolecular Chemistry, Ural Federal University, 19 Mira Str., 620002 Ekaterinburg, Russia. and Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 22 S. Kovalevskaya Str., 620990 Ekaterinburg, Russia
| | - Oleg N Chupakhin
- Department of Organic & Biomolecular Chemistry, Ural Federal University, 19 Mira Str., 620002 Ekaterinburg, Russia. and Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 22 S. Kovalevskaya Str., 620990 Ekaterinburg, Russia
| | - Bert U W Maes
- Division of Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium.
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12
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Su X, Ye L, Chen J, Liu X, Jiang S, Wang F, Liu L, Yang C, Chang X, Li Z, Gu Q, Liu X. Copper‐Catalyzed Enantioconvergent Cross‐Coupling of Racemic Alkyl Bromides with Azole C(sp
2
)−H Bonds. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202009527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xiao‐Long Su
- Shaanxi Key Laboratory of Phytochemistry College of Chemistry and Chemical Engineering Baoji University of Arts and Sciences Baoji Shaanxi 721013 China
- Shenzhen Grubbs Institute and Department of Chemistry Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 China
| | - Liu Ye
- Academy for Advanced Interdisciplinary Studies and Department of Chemistry Southern University of Science and Technology Shenzhen 518055 China
| | - Ji‐Jun Chen
- Shenzhen Grubbs Institute and Department of Chemistry Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 China
| | - Xiao‐Dong Liu
- Shenzhen Grubbs Institute and Department of Chemistry Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 China
| | - Sheng‐Peng Jiang
- Shenzhen Grubbs Institute and Department of Chemistry Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 China
| | - Fu‐Li Wang
- Shenzhen Grubbs Institute and Department of Chemistry Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 China
| | - Lin Liu
- Shenzhen Grubbs Institute and Department of Chemistry Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 China
| | - Chang‐Jiang Yang
- Shenzhen Grubbs Institute and Department of Chemistry Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 China
| | - Xiao‐Yong Chang
- Shenzhen Grubbs Institute and Department of Chemistry Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 China
| | - Zhong‐Liang Li
- Academy for Advanced Interdisciplinary Studies and Department of Chemistry Southern University of Science and Technology Shenzhen 518055 China
| | - Qiang‐Shuai Gu
- Academy for Advanced Interdisciplinary Studies and Department of Chemistry Southern University of Science and Technology Shenzhen 518055 China
| | - Xin‐Yuan Liu
- Shenzhen Grubbs Institute and Department of Chemistry Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 China
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13
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Su XL, Ye L, Chen JJ, Liu XD, Jiang SP, Wang FL, Liu L, Yang CJ, Chang XY, Li ZL, Gu QS, Liu XY. Copper-Catalyzed Enantioconvergent Cross-Coupling of Racemic Alkyl Bromides with Azole C(sp 2 )-H Bonds. Angew Chem Int Ed Engl 2020; 60:380-384. [PMID: 32949177 DOI: 10.1002/anie.202009527] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 08/21/2020] [Indexed: 11/12/2022]
Abstract
The development of enantioconvergent cross-coupling of racemic alkyl halides directly with heteroarene C(sp2 )-H bonds has been impeded by the use of a base at elevated temperature that leads to racemization. We herein report a copper(I)/cinchona-alkaloid-derived N,N,P-ligand catalytic system that enables oxidative addition with racemic alkyl bromides under mild conditions. Thus, coupling with azole C(sp2 )-H bonds has been achieved in high enantioselectivity, affording a number of potentially useful α-chiral alkylated azoles, such as 1,3,4-oxadiazoles, oxazoles, and benzo[d]oxazoles as well as 1,3,4-triazoles, for drug discovery. Mechanistic experiments indicated facile deprotonation of an azole C(sp2 )-H bond and the involvement of alkyl radical species under the reaction conditions.
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Affiliation(s)
- Xiao-Long Su
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji, Shaanxi, 721013, China.,Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Liu Ye
- Academy for Advanced Interdisciplinary Studies and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Ji-Jun Chen
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Xiao-Dong Liu
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Sheng-Peng Jiang
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Fu-Li Wang
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Lin Liu
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Chang-Jiang Yang
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Xiao-Yong Chang
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Zhong-Liang Li
- Academy for Advanced Interdisciplinary Studies and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Qiang-Shuai Gu
- Academy for Advanced Interdisciplinary Studies and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Xin-Yuan Liu
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China
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14
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Chen S, Ranjan P, Voskressensky LG, Van der Eycken EV, Sharma UK. Recent Developments in Transition-Metal Catalyzed Direct C-H Alkenylation, Alkylation, and Alkynylation of Azoles. Molecules 2020; 25:molecules25214970. [PMID: 33121108 PMCID: PMC7662665 DOI: 10.3390/molecules25214970] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 10/23/2020] [Accepted: 10/24/2020] [Indexed: 12/17/2022] Open
Abstract
The transition metal-catalyzed C–H bond functionalization of azoles has emerged as one of the most important strategies to decorate these biologically important scaffolds. Despite significant progress in the C–H functionalization of various heteroarenes, the regioselective alkylation and alkenylation of azoles are still arduous transformations in many cases. This review covers recent advances in the direct C–H alkenylation, alkylation and alkynylation of azoles utilizing transition metal-catalysis. Moreover, the limitations of different strategies, chemoselectivity and regioselectivity issues will be discussed in this review.
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Affiliation(s)
- Su Chen
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001 Leuven, Belgium; (S.C.); (P.R.)
| | - Prabhat Ranjan
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001 Leuven, Belgium; (S.C.); (P.R.)
| | - Leonid G. Voskressensky
- Organic Chemistry Department, Science Faculty, Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya street 6, RU-117198 Moscow, Russia;
| | - Erik V. Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001 Leuven, Belgium; (S.C.); (P.R.)
- Organic Chemistry Department, Science Faculty, Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya street 6, RU-117198 Moscow, Russia;
- Correspondence: (E.V.V.d.E.); (U.K.S.)
| | - Upendra K. Sharma
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001 Leuven, Belgium; (S.C.); (P.R.)
- Correspondence: (E.V.V.d.E.); (U.K.S.)
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15
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Liu C, Wang Z, Wang L, Li P, Zhang Y. Palladium-catalyzed direct C2-arylation of azoles with aromatic triazenes. Org Biomol Chem 2019; 17:9209-9216. [PMID: 31595932 DOI: 10.1039/c9ob01883b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A highly efficient palladium-catalyzed arylation of azoles at the C2-position using 1-aryltriazenes as aryl reagents was developed. Azoles including oxazoles, thiazoles, imidazoles, 1,3,4-oxadiazoles, and oxazolines could react with 1-aryltriazenes smoothly to generate the corresponding products in good to excellent yields, and various substitution patterns were tolerated toward the reaction.
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Affiliation(s)
- Can Liu
- Advanced Research Institute and Department of Chemistry, Taizhou University, Taizhou, Zhejiang 318000, P. R. China.
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16
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Gan H. S
8
‐Mediated Cyclization of 2‐Hydroxy/Amino anilines with Arylacetylene: Approach to Benzoxazoles and Benzimidazoles. ChemistrySelect 2019. [DOI: 10.1002/slct.201902349] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Haifeng Gan
- College of Biotechnology and Pharmaceutical EngineeringNanjing Tech University, Nanjing, Jiangsu 211800 P. R. China
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17
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Decoration of 1,3-oxazole by alkyl substituents via CH activation (microreview). Chem Heterocycl Compd (N Y) 2019. [DOI: 10.1007/s10593-019-02442-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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18
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Gandeepan P, Müller T, Zell D, Cera G, Warratz S, Ackermann L. 3d Transition Metals for C-H Activation. Chem Rev 2018; 119:2192-2452. [PMID: 30480438 DOI: 10.1021/acs.chemrev.8b00507] [Citation(s) in RCA: 1402] [Impact Index Per Article: 233.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
C-H activation has surfaced as an increasingly powerful tool for molecular sciences, with notable applications to material sciences, crop protection, drug discovery, and pharmaceutical industries, among others. Despite major advances, the vast majority of these C-H functionalizations required precious 4d or 5d transition metal catalysts. Given the cost-effective and sustainable nature of earth-abundant first row transition metals, the development of less toxic, inexpensive 3d metal catalysts for C-H activation has gained considerable recent momentum as a significantly more environmentally-benign and economically-attractive alternative. Herein, we provide a comprehensive overview on first row transition metal catalysts for C-H activation until summer 2018.
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Affiliation(s)
- Parthasarathy Gandeepan
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Thomas Müller
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Daniel Zell
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Gianpiero Cera
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Svenja Warratz
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
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19
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Detmar E, Müller V, Zell D, Ackermann L, Breugst M. Cobalt-catalyzed C-H cyanations: Insights into the reaction mechanism and the role of London dispersion. Beilstein J Org Chem 2018; 14:1537-1545. [PMID: 30013680 PMCID: PMC6036974 DOI: 10.3762/bjoc.14.130] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 06/02/2018] [Indexed: 12/20/2022] Open
Abstract
Carboxylate-assisted cobalt(III)-catalyzed C–H cyanations are highly efficient processes for the synthesis of (hetero)aromatic nitriles. We have now analyzed the cyanation of differently substituted 2-phenylpyridines in detail computationally by density functional theory and also experimentally. Based on our investigations, we propose a plausible reaction mechanism for this transformation that is in line with the experimental observations. Additional calculations, including NCIPLOT, dispersion interaction densities, and local energy decomposition analysis, for the model cyanation of 2-phenylpyridine furthermore highlight that London dispersion is an important factor that enables this challenging C–H transformation. Nonbonding interactions between the Cp* ligand and aromatic and C–H-rich fragments of other ligands at the cobalt center significantly contribute to a stabilization of cobalt intermediates and transition states.
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Affiliation(s)
- Eric Detmar
- Department für Chemie, Universität zu Köln, Greinstraße 4, 50939 Köln, Germany
| | - Valentin Müller
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstraße 2, 37077 Göttingen, Germany
| | - Daniel Zell
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstraße 2, 37077 Göttingen, Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstraße 2, 37077 Göttingen, Germany
| | - Martin Breugst
- Department für Chemie, Universität zu Köln, Greinstraße 4, 50939 Köln, Germany
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20
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Pan WJ, Wang ZX. Palladium-Catalyzed C−H Benzylation of (Benzo)oxazoles with Benzylic Quaternary Ammonium Triflates. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800264] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Wen-Jing Pan
- CAS Key Laboratory of Soft Matter Chemistry, and Department of Chemistry; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Zhong-Xia Wang
- CAS Key Laboratory of Soft Matter Chemistry, and Department of Chemistry; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
- Collaborative Innovation Center of Chemical Science, and Engineering (Tianjin); Tianjin 300072 P.R. China
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21
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Moncea O, Poinsot D, Fokin AA, Schreiner PR, Hierso J. Palladium‐Catalyzed C2−H Arylation of Unprotected (N−H)‐Indoles “On Water” Using Primary Diamantyl Phosphine Oxides as a Class of Primary Phosphine Oxide Ligands. ChemCatChem 2018. [DOI: 10.1002/cctc.201800187] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Oana Moncea
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR-CNRS 6302 Université de Bourgogne Franche-Comté 9 avenue Alain Savary 21078 Dijon France
- Institute of Organic Chemistry Justus-Liebig-University Heinrich-Buff-Ring 17 35392 Giessen Germany
| | - Didier Poinsot
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR-CNRS 6302 Université de Bourgogne Franche-Comté 9 avenue Alain Savary 21078 Dijon France
| | - Andrey A. Fokin
- Institute of Organic Chemistry Justus-Liebig-University Heinrich-Buff-Ring 17 35392 Giessen Germany
- Department of Organic Chemistry Igor Sikorsky Kiev Polytechnic Institute Pobeda Ave. 37 03056 Kiev Ukraine
| | - Peter R. Schreiner
- Institute of Organic Chemistry Justus-Liebig-University Heinrich-Buff-Ring 17 35392 Giessen Germany
| | - Jean‐Cyrille Hierso
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR-CNRS 6302 Université de Bourgogne Franche-Comté 9 avenue Alain Savary 21078 Dijon France
- Institut Universitaire de France (IUF) 103 Bd. Saint Michel 75005 Paris Cedex 5 France
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22
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Astarloa I, SanMartin R, Herrero MT, Domínguez E. Aqueous α-Arylation of Mono- and Diarylethanone Enolates at Low Catalyst Loading. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701596] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Iratxe Astarloa
- Department of Organic Chemistry II, Faculty of Science and Technology; University of the Basque Country (UPV/EHU) Sarriena auzoa; z/g 48940 Leioa Spain
| | - Raul SanMartin
- Department of Organic Chemistry II, Faculty of Science and Technology; University of the Basque Country (UPV/EHU) Sarriena auzoa; z/g 48940 Leioa Spain
| | - María Teresa Herrero
- Department of Organic Chemistry II, Faculty of Science and Technology; University of the Basque Country (UPV/EHU) Sarriena auzoa; z/g 48940 Leioa Spain
| | - Esther Domínguez
- Department of Organic Chemistry II, Faculty of Science and Technology; University of the Basque Country (UPV/EHU) Sarriena auzoa; z/g 48940 Leioa Spain
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23
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Affiliation(s)
- Peng Lu
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
| | - Chong-Lei Ji
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
| | - Zhan Lu
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
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24
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Ghorai D, Müller V, Keil H, Stalke D, Zanoni G, Tkachenko BA, Schreiner PR, Ackermann L. Secondary Phosphine Oxide Preligands for Palladium-Catalyzed C-H (Hetero)Arylations: Efficient Access to Pybox Ligands. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700663] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Debasish Ghorai
- Institut für Organische und Biomolekulare Chemie; Georg-August-Universität; Tammannstraße 2 37077 Göttingen Germany
- Department of Chemistry; University of Pavia; Viale Taramelli, 10 27100 Pavia Italy
| | - Valentin Müller
- Institut für Organische und Biomolekulare Chemie; Georg-August-Universität; Tammannstraße 2 37077 Göttingen Germany
| | - Helena Keil
- Institut für Anorganische Chemie; Georg-August-Universität; Tammannstraße 4 37077 Göttingen Germany
| | - Dietmar Stalke
- Institut für Anorganische Chemie; Georg-August-Universität; Tammannstraße 4 37077 Göttingen Germany
| | - Giuseppe Zanoni
- Department of Chemistry; University of Pavia; Viale Taramelli, 10 27100 Pavia Italy
| | - Boryslav A. Tkachenko
- Institute of Organic Chemistry; Justus-Liebig University; Heinrich-Buff-Ring 17 35392 Giessen Germany
| | - Peter R. Schreiner
- Institute of Organic Chemistry; Justus-Liebig University; Heinrich-Buff-Ring 17 35392 Giessen Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie; Georg-August-Universität; Tammannstraße 2 37077 Göttingen Germany
- Department of Chemistry; University of Pavia; Viale Taramelli, 10 27100 Pavia Italy
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25
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Nguyen TB, Retailleau P. Elemental Sulfur-Promoted Oxidative Rearranging Coupling between o-Aminophenols and Ketones: A Synthesis of 2-Alkyl benzoxazoles under Mild Conditions. Org Lett 2017; 19:3887-3890. [DOI: 10.1021/acs.orglett.7b01775] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Thanh Binh Nguyen
- Institut de Chimie des Substances
Naturelles, CNRS UPR 2301, Université Paris-Sud, Université
Paris-Saclay, 1, avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Pascal Retailleau
- Institut de Chimie des Substances
Naturelles, CNRS UPR 2301, Université Paris-Sud, Université
Paris-Saclay, 1, avenue de la Terrasse, 91198 Gif-sur-Yvette, France
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26
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Kljajic M, Puschnig JG, Weber H, Breinbauer R. Additive-Free Pd-Catalyzed α-Allylation of Imine-Containing Heterocycles. Org Lett 2017; 19:126-129. [PMID: 27936786 PMCID: PMC5223276 DOI: 10.1021/acs.orglett.6b03407] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Indexed: 11/28/2022]
Abstract
An additive-free Pd-catalyzed α-allylation of different imino-group-ontaining heterocycles is reported. The activation of α-CH pronucleophiles (pKa (DMSO) > 25) occurs without the addition of strong bases or Lewis acids using only the Pd/Xantphos catalyst system. The reaction scope has been studied for various 5- and 6-membered nitrogen-containing heterocycles (yields up to 96%). Mechanistic investigations suggest an initial allylation of the imine-N followed by a Pd-catalyzed formal aza-Claisen rearrangement.
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Affiliation(s)
- Marko Kljajic
- Institute
of Organic Chemistry, Graz University of
Technology, Stremayrgasse
9, A-8010 Graz, Austria
| | - Johannes G. Puschnig
- Institute
of Organic Chemistry, Graz University of
Technology, Stremayrgasse
9, A-8010 Graz, Austria
| | - Hansjörg Weber
- Institute
of Organic Chemistry, Graz University of
Technology, Stremayrgasse
9, A-8010 Graz, Austria
| | - Rolf Breinbauer
- Institute
of Organic Chemistry, Graz University of
Technology, Stremayrgasse
9, A-8010 Graz, Austria
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27
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Gutierrez DA, Lee WCC, Shen Y, Li JJ. Palladium-catalyzed electrophilic C–H fluorination of arenes using oxazoline as a removable directing group. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.10.079] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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28
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Wuttke A, Mata RA. Visualizing dispersion interactions through the use of local orbital spaces. J Comput Chem 2016; 38:15-23. [DOI: 10.1002/jcc.24508] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 09/08/2016] [Accepted: 09/10/2016] [Indexed: 12/15/2022]
Affiliation(s)
- Axel Wuttke
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen; Tammannstrasse 6 Göttingen D-37077 Germany
| | - Ricardo A. Mata
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen; Tammannstrasse 6 Göttingen D-37077 Germany
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29
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Yang F, Koeller J, Ackermann L. Photoinduced Copper-Catalyzed C-H Arylation at Room Temperature. Angew Chem Int Ed Engl 2016; 55:4759-62. [PMID: 26961222 DOI: 10.1002/anie.201512027] [Citation(s) in RCA: 109] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 01/29/2016] [Indexed: 01/01/2023]
Abstract
Room-temperature azole C-H arylations were accomplished with inexpensive copper(I) compounds by means of photoinduced catalysis. The expedient copper catalysis set the stage for site-selective C-H arylations of non-aromatic oxazolines under mild reaction conditions, and provides step-economical access to the alkaloid natural products balsoxin and texamine.
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Affiliation(s)
- Fanzhi Yang
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstraße 2, 37077, Göttingen, Germany
| | - Julian Koeller
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstraße 2, 37077, Göttingen, Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstraße 2, 37077, Göttingen, Germany. .,International Center for Advanced Studies of Energy Conversion (ICASEC), Georg-August University of Göttingen, Germany.
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30
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Yang F, Koeller J, Ackermann L. Photoinduced Copper‐Catalyzed C−H Arylation at Room Temperature. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201512027] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Fanzhi Yang
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
| | - Julian Koeller
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
- International Center for Advanced Studies of Energy Conversion (ICASEC) Georg-August University of Göttingen Germany
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31
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Computational and 31 P NMR studies of moisture-metastable cyclic diaminophosphine oxide preligands. Polyhedron 2016. [DOI: 10.1016/j.poly.2015.12.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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32
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Guntreddi T, Vanjari R, Kumar S, Singh R, Singh N, Kumar P, Singh KN. Elemental sulfur mediated synthesis of benzoxazoles, benzothiazoles and quinoxalines via decarboxylative coupling of 2-hydroxy/mercapto/amino-anilines with cinnamic acids. RSC Adv 2016. [DOI: 10.1039/c6ra17491d] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
A practical method has been developed for the synthesis of 2-benzylbenzoxazoles and 2-benzylbenzothiazoles using sulfur mediated decarboxylative coupling of cinnamic acids with 2-hydroxyanilines and 2-mercaptoanilines respectively.
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Affiliation(s)
- Tirumaleswararao Guntreddi
- Department of Chemistry (Centre of Advanced Study)
- Institute of Science
- Banaras Hindu University
- Varanasi 221005
- India
| | - Rajeshwer Vanjari
- Department of Chemistry (Centre of Advanced Study)
- Institute of Science
- Banaras Hindu University
- Varanasi 221005
- India
| | - Saurabh Kumar
- Department of Chemistry (Centre of Advanced Study)
- Institute of Science
- Banaras Hindu University
- Varanasi 221005
- India
| | - Rahul Singh
- Department of Chemistry (Centre of Advanced Study)
- Institute of Science
- Banaras Hindu University
- Varanasi 221005
- India
| | - Neetu Singh
- Department of Chemistry (Centre of Advanced Study)
- Institute of Science
- Banaras Hindu University
- Varanasi 221005
- India
| | - Promod Kumar
- Department of Chemistry (Centre of Advanced Study)
- Institute of Science
- Banaras Hindu University
- Varanasi 221005
- India
| | - Krishna Nand Singh
- Department of Chemistry (Centre of Advanced Study)
- Institute of Science
- Banaras Hindu University
- Varanasi 221005
- India
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33
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Xi T, Mei Y, Lu Z. Palladium-Catalyzed C-2 C–H Heteroarylation of Chiral Oxazolines: Diverse Synthesis of Chiral Oxazoline Ligands. Org Lett 2015; 17:5939-41. [DOI: 10.1021/acs.orglett.5b03041] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tuo Xi
- Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang 310028, China
| | - Yuncai Mei
- Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang 310028, China
| | - Zhan Lu
- Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang 310028, China
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34
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Wagner JP, Schreiner PR. London’sche Dispersionswechselwirkungen in der Molekülchemie - eine Neubetrachtung sterischer Effekte. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503476] [Citation(s) in RCA: 190] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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35
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N-heterocyclic carbene-Pd(II)-1-methylimidazole complex catalyzed C–H bond benzylation of (benzo)oxazoles with benzyl chlorides. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.07.030] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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36
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Wagner JP, Schreiner PR. London dispersion in molecular chemistry--reconsidering steric effects. Angew Chem Int Ed Engl 2015; 54:12274-96. [PMID: 26262562 DOI: 10.1002/anie.201503476] [Citation(s) in RCA: 633] [Impact Index Per Article: 70.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Indexed: 12/15/2022]
Abstract
London dispersion, which constitutes the attractive part of the famous van der Waals potential, has long been underappreciated in molecular chemistry as an important element of structural stability, and thus affects chemical reactivity and catalysis. This negligence is due to the common notion that dispersion is weak, which is only true for one pair of interacting atoms. For increasingly larger structures, the overall dispersion contribution grows rapidly and can amount to tens of kcal mol(-1) . This Review collects and emphasizes the importance of inter- and intramolecular dispersion for molecules consisting mostly of first row atoms. The synergy of experiment and theory has now reached a stage where dispersion effects can be examined in fine detail. This forces us to reconsider our perception of steric hindrance and stereoelectronic effects. The quantitation of dispersion energy donors will improve our ability to design sophisticated molecular structures and much better catalysts.
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Affiliation(s)
- J Philipp Wagner
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, 35392 Giessen (Germany)
| | - Peter R Schreiner
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, 35392 Giessen (Germany).
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37
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sp3–sp3 carbon–carbon bond formation using 2-alkylazoles and a bromoacrylate as the reaction partners. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.05.082] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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38
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Laclef S, Harari M, Godeau J, Schmitz-Afonso I, Bischoff L, Hoarau C, Levacher V, Fruit C, Besson T. Ligand-free Pd-catalyzed and copper-assisted C-H arylation of quinazolin-4-ones with aryl iodides under microwave heating. Org Lett 2015; 17:1700-3. [PMID: 25781369 DOI: 10.1021/acs.orglett.5b00467] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A microwave-assisted method for the palladium-catalyzed direct arylation of quinazolin-4-one has been developed under copper-assistance. This method is applicable to a wide range of aryl iodides and substituted (2H)-quinazolin-4-ones. This protocol provides a simple and efficient way to synthesize biologically relevant 2-arylquinazolin-4-one backbones.
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Affiliation(s)
- Sylvain Laclef
- Normandie Univ, COBRA, UMR 6014 et FR 3038; Univ Rouen; INSA Rouen; CNRS, IRCOF, 1 rue Tesnière, 76821 Mont Saint Aignan Cedex, France
| | - Marine Harari
- Normandie Univ, COBRA, UMR 6014 et FR 3038; Univ Rouen; INSA Rouen; CNRS, IRCOF, 1 rue Tesnière, 76821 Mont Saint Aignan Cedex, France
| | - Julien Godeau
- Normandie Univ, COBRA, UMR 6014 et FR 3038; Univ Rouen; INSA Rouen; CNRS, IRCOF, 1 rue Tesnière, 76821 Mont Saint Aignan Cedex, France
| | - Isabelle Schmitz-Afonso
- Normandie Univ, COBRA, UMR 6014 et FR 3038; Univ Rouen; INSA Rouen; CNRS, IRCOF, 1 rue Tesnière, 76821 Mont Saint Aignan Cedex, France
| | - Laurent Bischoff
- Normandie Univ, COBRA, UMR 6014 et FR 3038; Univ Rouen; INSA Rouen; CNRS, IRCOF, 1 rue Tesnière, 76821 Mont Saint Aignan Cedex, France
| | - Christophe Hoarau
- Normandie Univ, COBRA, UMR 6014 et FR 3038; Univ Rouen; INSA Rouen; CNRS, IRCOF, 1 rue Tesnière, 76821 Mont Saint Aignan Cedex, France
| | - Vincent Levacher
- Normandie Univ, COBRA, UMR 6014 et FR 3038; Univ Rouen; INSA Rouen; CNRS, IRCOF, 1 rue Tesnière, 76821 Mont Saint Aignan Cedex, France
| | - Corinne Fruit
- Normandie Univ, COBRA, UMR 6014 et FR 3038; Univ Rouen; INSA Rouen; CNRS, IRCOF, 1 rue Tesnière, 76821 Mont Saint Aignan Cedex, France
| | - Thierry Besson
- Normandie Univ, COBRA, UMR 6014 et FR 3038; Univ Rouen; INSA Rouen; CNRS, IRCOF, 1 rue Tesnière, 76821 Mont Saint Aignan Cedex, France
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39
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Hikawa H, Izumi K, Ino Y, Kikkawa S, Yokoyama Y, Azumaya I. Palladium-Catalyzed Benzylic CH BenzylationviaBis-Benzylpalladium(II) Complexes in Water: An Effective Pathway for the Direct Construction ofN-(1,2-Diphenylethyl)anilines. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201401017] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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40
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Haas D, Hofmayer MS, Bresser T, Knochel P. Zincation of 4,4-dimethyloxazoline using TMPZnCl·LiCl. A new preparation of 2-aryloxazolines. Chem Commun (Camb) 2015; 51:6415-7. [DOI: 10.1039/c5cc01144b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
4,4-Dimethyloxazoline is directly zincated using TMPZnCl·LiCl and further functionalized by Pd-catalyzed cross-couplings, as well as Cu-mediated acylation and allylation reactions.
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Affiliation(s)
- Diana Haas
- Ludwig Maximilians-University Munich
- Department of Chemistry
- 81377 München
- Germany
| | | | - Tomke Bresser
- Ludwig Maximilians-University Munich
- Department of Chemistry
- 81377 München
- Germany
| | - Paul Knochel
- Ludwig Maximilians-University Munich
- Department of Chemistry
- 81377 München
- Germany
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41
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Wellala NPN, Guan H. A diphenyl ether derived bidentate secondary phosphine oxide as a preligand for nickel-catalyzed C–S cross-coupling reactions. Org Biomol Chem 2015; 13:10802-7. [DOI: 10.1039/c5ob01874a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A bidentate secondary phosphine oxide is a more effective preligand than Ph2P(O)H in nickel-catalyzed C–S cross-coupling reactions.
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Affiliation(s)
| | - Hairong Guan
- Department of Chemistry
- University of Cincinnati
- Cincinnati
- USA
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42
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Hikawa H, Toyomoto M, Kikkawa S, Azumaya I. Direct substitution of benzylic alcohols with electron-deficient benzenethiols via π-benzylpalladium(ii) in water. Org Biomol Chem 2015; 13:11459-65. [DOI: 10.1039/c5ob01717c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
An efficient and environmentally benign method for the direct nucleophilic substitution of benzylic alcohols with electron-deficient benzenethiols in water is developed. This strategy is an attractive atom-economical process, which affords the desired products along with water as the sole co-product.
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Affiliation(s)
- Hidemasa Hikawa
- Faculty of Pharmaceutical Sciences
- Toho University
- Funabashi
- Japan
| | - Mariko Toyomoto
- Faculty of Pharmaceutical Sciences
- Toho University
- Funabashi
- Japan
| | - Shoko Kikkawa
- Faculty of Pharmaceutical Sciences
- Toho University
- Funabashi
- Japan
| | - Isao Azumaya
- Faculty of Pharmaceutical Sciences
- Toho University
- Funabashi
- Japan
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43
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Muselli M, Baudequin C, Hoarau C, Bischoff L. Pd-Catalyzed direct C–H functionalization of imidazolones with aryl- and alkenyl halides. Chem Commun (Camb) 2015; 51:745-8. [DOI: 10.1039/c4cc07917e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Direct C–H arylation and alkenylation of 4,4′-dialkylimidazolones with a broad range of halides under palladium and copper catalysis have been developed.
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Affiliation(s)
- Mickaël Muselli
- Mickaël Muselli
- Christine Baudequin
- Christophe Hoarau
- Laurent Bischoff Normandie Univ
- COBRA
| | - Christine Baudequin
- Mickaël Muselli
- Christine Baudequin
- Christophe Hoarau
- Laurent Bischoff Normandie Univ
- COBRA
| | - Christophe Hoarau
- Mickaël Muselli
- Christine Baudequin
- Christophe Hoarau
- Laurent Bischoff Normandie Univ
- COBRA
| | - Laurent Bischoff
- Mickaël Muselli
- Christine Baudequin
- Christophe Hoarau
- Laurent Bischoff Normandie Univ
- COBRA
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44
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Chang TW, Ho PY, Mao KC, Hong FE. Developing five-membered heterocycle substituted phosphinous acids as ligands for palladium-catalyzed Suzuki–Miyaura and Catellani reactions. Dalton Trans 2015; 44:17129-42. [DOI: 10.1039/c5dt02611c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Several secondary phosphine oxides (SPOs) were prepared. Organic products with unexpected conformations (9 and 10) were obtained besides 8 from Heck-type Catellani reactions with the assistance of the selected SPO ligand 5f.
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Affiliation(s)
- Ting-Wei Chang
- Department of Chemistry
- National Chung Hsing University
- Taichung 40227
- Taiwan
| | - Pei-Yun Ho
- Department of Chemistry
- National Chung Hsing University
- Taichung 40227
- Taiwan
| | - Kuo-Chung Mao
- Department of Chemistry
- National Chung Hsing University
- Taichung 40227
- Taiwan
| | - Fung-E. Hong
- Department of Chemistry
- National Chung Hsing University
- Taichung 40227
- Taiwan
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45
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Bae S, Jang HL, Jung H, Joo JM. Catalytic C–H Allylation and Benzylation of Pyrazoles. J Org Chem 2014; 80:690-7. [DOI: 10.1021/jo5025317] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Seri Bae
- Department of Chemistry and
Chemistry Institute of Functional Materials, Pusan National University, Busan 609-735, Republic of Korea
| | - Ha-Lim Jang
- Department of Chemistry and
Chemistry Institute of Functional Materials, Pusan National University, Busan 609-735, Republic of Korea
| | - Haeun Jung
- Department of Chemistry and
Chemistry Institute of Functional Materials, Pusan National University, Busan 609-735, Republic of Korea
| | - Jung Min Joo
- Department of Chemistry and
Chemistry Institute of Functional Materials, Pusan National University, Busan 609-735, Republic of Korea
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46
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Garg P, Chaudhary S, Milton MD. Synthesis of 2-Aryl/Heteroaryloxazolines from Nitriles under Metal- and Catalyst-Free Conditions and Evaluation of Their Antioxidant Activities. J Org Chem 2014; 79:8668-77. [DOI: 10.1021/jo501430p] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Parul Garg
- Department of Chemistry, University of Delhi, Delhi 110 007, India
| | - Shweta Chaudhary
- Department of Chemistry, University of Delhi, Delhi 110 007, India
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47
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Gao F, Kim BS, Walsh PJ. Room-temperature palladium-catalyzed direct 2-arylation of benzoxazoles with aryl and heteroaryl bromides. Chem Commun (Camb) 2014; 50:10661-4. [PMID: 25078988 DOI: 10.1039/c4cc05307a] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
An efficient room-temperature palladium-catalyzed direct 2-arylation of benzoxazoles with aryl bromides is presented. The Pd(OAc)2/NiXantphos-based catalyst enables the introduction of various aryl and heteroaryl groups, via a deprotonative cross-coupling process (DCCP) in good to excellent yields (60-99%).
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Affiliation(s)
- Feng Gao
- Department of Medicinal Plants, Agronomy College, Sichuan Agricultural University, No. 211, Huimin Road, Wenjiang Region, Chengdu 611130, P. R. China
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48
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Shen XB, Zhang Y, Chen WX, Xiao ZK, Hu TT, Shao LX. Direct C–H Bond Arylation of (Benzo)oxazoles with Aryl Chlorides Catalyzed by N-Heterocyclic Carbene–Palladium(II)–1-Methylimidazole Complex. Org Lett 2014; 16:1984-7. [DOI: 10.1021/ol500531m] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Xiao-Bao Shen
- College
of Chemistry and Materials Engineering, Wenzhou University, Chashan University Town, Wenzhou, Zhejiang Province 325035, People’s Republic of China
| | - Yun Zhang
- College
of Chemistry and Materials Engineering, Wenzhou University, Chashan University Town, Wenzhou, Zhejiang Province 325035, People’s Republic of China
| | - Wen-Xin Chen
- College
of Chemistry and Materials Engineering, Wenzhou University, Chashan University Town, Wenzhou, Zhejiang Province 325035, People’s Republic of China
| | - Zheng-Kang Xiao
- College
of Chemistry and Materials Engineering, Wenzhou University, Chashan University Town, Wenzhou, Zhejiang Province 325035, People’s Republic of China
| | - Ting-Ting Hu
- Oujiang
College, Wenzhou University, Chashan University Town, Wenzhou, Zhejiang Province 325035, People’s Republic of China
| | - Li-Xiong Shao
- College
of Chemistry and Materials Engineering, Wenzhou University, Chashan University Town, Wenzhou, Zhejiang Province 325035, People’s Republic of China
- College
of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang Province 321004, People’s Republic of China
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49
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Li G, Arisawa M, Yamaguchi M. Rhodium-catalyzed synthesis of unsymmetrical di(aryl/heteroaryl)methanes using aryl/heteroarylmethyl ketones via CO–C bond cleavage. Chem Commun (Camb) 2014; 50:4328-30. [DOI: 10.1039/c4cc00816b] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The RhH(PPh3)4 complex catalyzes the reaction of aryl/heteroarylmethyl ketones and aryl heteroaryl ethers giving unsymmetrical diarylmethanes containing one or two heteroarenes.
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Affiliation(s)
- Guangzhe Li
- Department of Organic Chemistry
- Graduate School of Pharmaceutical Sciences
- Tohoku University
- Sendai, Japan
| | - Mieko Arisawa
- Department of Organic Chemistry
- Graduate School of Pharmaceutical Sciences
- Tohoku University
- Sendai, Japan
| | - Masahiko Yamaguchi
- Department of Organic Chemistry
- Graduate School of Pharmaceutical Sciences
- Tohoku University
- Sendai, Japan
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50
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Kapdi AR. Organometallic aspects of transition-metal catalysed regioselective C–H bond functionalisation of arenes and heteroarenes. Dalton Trans 2014; 43:3021-34. [DOI: 10.1039/c3dt52737a] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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