1
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Suga T, Takada R, Sakamoto M, Ukaji Y. Directing-Group-Assisted Non-Strained Ether C-O Bond Homolysis Mediated by Low-Valent Titanium. Org Lett 2024; 26:2315-2320. [PMID: 38456776 DOI: 10.1021/acs.orglett.4c00590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2024]
Abstract
Ether C-O bonds are typical constituents of organic molecules that are seldom regarded as reactive functional groups except when highly strained. With the assistance of appropriate directing groups, low-valent titanium was found to homolytically cleave non-strained C-O bonds. In particular, a newly designed catechol monoether directing group rendered a route toward the activation of non-benzylic C(sp3)-O bonds. This method has been applied to conventional radical addition reactions to alkenes.
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Affiliation(s)
- Takuya Suga
- Division of Material Chemistry, Graduate School of Natural Science and Technology, Kanazawa University,, Kakuma, Kanazawa, 920-1192, Japan
| | - Ryusei Takada
- Division of Material Chemistry, Graduate School of Natural Science and Technology, Kanazawa University,, Kakuma, Kanazawa, 920-1192, Japan
| | - Masaya Sakamoto
- Division of Material Chemistry, Graduate School of Natural Science and Technology, Kanazawa University,, Kakuma, Kanazawa, 920-1192, Japan
| | - Yutaka Ukaji
- Division of Material Chemistry, Graduate School of Natural Science and Technology, Kanazawa University,, Kakuma, Kanazawa, 920-1192, Japan
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2
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Chen YX, He JT, Wu MC, Liu ZL, Xia PJ, Chen K, Xiang HY, Yang H. Visible-light-driven oxidation of organosilanes by a charge-transfer complex. Chem Commun (Camb) 2023; 59:6588-6591. [PMID: 37190787 DOI: 10.1039/d3cc01972a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Direct oxidation of organosilanes is one of the most straightforward ways to access silanols. Herein, we describe a novel photo-induced strategy for oxidation of organosilanes to access silanols, promoted by a photoactive charge-transfer complex (CTC) between sodium benzenesulfinate and molecular O2. A streamlined sequence transformation of organosilanes to silyl ethers was also readily achieved. This developed protocol represents the first example of CTC-based oxidation of organosilanes, offering a facile approach to access a series of silanol and silyl ether products.
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Affiliation(s)
- Yi-Xuan Chen
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China.
| | - Jun-Tao He
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China.
| | - Mei-Chun Wu
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China.
- College of Chemistry and Chemical Engineering, Huaihua University, Huaihua 418008, P. R. China
| | - Zhi-Lin Liu
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China.
| | - Peng-Ju Xia
- School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China
| | - Kai Chen
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China.
| | - Hao-Yue Xiang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China.
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, Henan, P. R. China
| | - Hua Yang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China.
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3
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Zhang J, Chen Y, Sun J, Wang J, Zhou M. Synthesis of alkenylated tetrathienoacenes obtained by palladium catalyzed direct C–H alkenylations. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.133215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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4
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Lei CW, Wang XY, Mu BS, Yu JS, Zhou Y, Zhou J. Me 2(CH 2Cl)SiCF 3 Facilitated Tandem Synthesis of Oxasilacycles Featuring a Trifluoromethyl Group. Org Lett 2022; 24:8364-8369. [DOI: 10.1021/acs.orglett.2c03393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Chuan-Wen Lei
- College of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
| | - Xi-Yu Wang
- College of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
| | - Bo-Shuai Mu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development; Shanghai Key Laboratory of Green Chemistry and Chemical Process, East China Normal University, Shanghai 200062, China
| | - Jin-Sheng Yu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development; Shanghai Key Laboratory of Green Chemistry and Chemical Process, East China Normal University, Shanghai 200062, China
| | - Ying Zhou
- College of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
| | - Jian Zhou
- College of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development; Shanghai Key Laboratory of Green Chemistry and Chemical Process, East China Normal University, Shanghai 200062, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 200032, China
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5
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Vala D, Vala RM, Patel HM. Versatile Synthetic Platform for 1,2,3-Triazole Chemistry. ACS OMEGA 2022; 7:36945-36987. [PMID: 36312377 PMCID: PMC9608397 DOI: 10.1021/acsomega.2c04883] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 09/30/2022] [Indexed: 05/31/2023]
Abstract
1,2,3-Triazole scaffolds are not obtained in nature, but they are still intensely investigated by synthetic chemists in various fields due to their excellent properties and green synthetic routes. This review will provide a library of all synthetic routes used in the past 21 years to synthesize 1,2,3-triazoles and their derivatives using various metal catalysts (such as Cu, Ni, Ru, Ir, Rh, Pd, Au, Ag, Zn, and Sm), organocatalysts, metal-free as well as solvent- and catalyst-free neat syntheses, along with their mechanistic cycles, recyclability studies, solvent systems, and reaction condition effects on regioselectivity. Constant developments indicate that 1,2,3-triazoles will help lead to future organic synthesis and are useful for creating molecular libraries of various functionalized 1,2,3-triazoles.
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6
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Li Z, Park HS, Qiao JX, Yeung KS, Yu JQ. Ligand-Enabled C-H Hydroxylation with Aqueous H 2O 2 at Room Temperature. J Am Chem Soc 2022; 144:18109-18116. [PMID: 36137252 PMCID: PMC10292862 DOI: 10.1021/jacs.2c08332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
With the large number of Pd(II)-catalyzed C-H activation reactions of native substrates developed in the past decade, the development of catalysts to enable the use of green oxidants under safe and practical conditions has become an increasingly important challenge. Notably, the compatibility of Pd(II) catalysts with sustainable aqueous H2O2 has been a long-standing challenge in catalysis including Wacker-type oxidations. We report herein a bifunctional bidentate carboxyl-pyridone (CarboxPyridone) ligand that enables room-temperature Pd-catalyzed C-H hydroxylation of a broad range of benzoic and phenylacetic acids with an industry-compatible oxidant, aqueous hydrogen peroxide (35% H2O2). The scalability of this methodology is demonstrated by a 1000 mmol scale reaction of ibuprofen (206 g) using only a 1 mol % Pd catalyst loading. The utility of this protocol is further illustrated through derivatization of the products and synthesis of polyfluorinated natural product coumestan and pterocarpene from phenol intermediates prepared using this methodology.
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Affiliation(s)
- Zhen Li
- The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, USA
| | - Han Seul Park
- The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, USA
| | - Jennifer X. Qiao
- Small Molecule Drug Discovery, Bristol Myers Squibb Research and Early Development, PO Box 4000, Princeton, NJ 08543, USA
| | - Kap-Sun Yeung
- Small Molecule Drug Discovery, Bristol Myers Squibb Research and Early Development, 100 Binney Street, Cambridge, MA 02142, USA
| | - Jin-Quan Yu
- The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, USA
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7
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Palladium-Catalyzed Organic Reactions Involving Hypervalent Iodine Reagents. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27123900. [PMID: 35745020 PMCID: PMC9230104 DOI: 10.3390/molecules27123900] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 06/07/2022] [Accepted: 06/11/2022] [Indexed: 01/13/2023]
Abstract
The chemistry of polyvalent iodine compounds has piqued the interest of researchers due to their role as important and flexible reagents in synthetic organic chemistry, resulting in a broad variety of useful organic molecules. These chemicals have potential uses in various functionalization procedures due to their non-toxic and environmentally friendly properties. As they are also strong electrophiles and potent oxidizing agents, the use of hypervalent iodine reagents in palladium-catalyzed transformations has received a lot of attention in recent years. Extensive research has been conducted on the subject of C—H bond functionalization by Pd catalysis with hypervalent iodine reagents as oxidants. Furthermore, the iodine(III) reagent is now often used as an arylating agent in Pd-catalyzed C—H arylation or Heck-type cross-coupling processes. In this article, the recent advances in palladium-catalyzed oxidative cross-coupling reactions employing hypervalent iodine reagents are reviewed in detail.
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8
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Hashimoto R, Hanaya K, Sugai T, Higashibayashi S. 1,2-Rearrangement from o-Quinols to Multisubstituted Catechols via Retro Diels-Alder Reaction of o-Quinol Dimers. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2022. [DOI: 10.1246/bcsj.20220025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Riichi Hashimoto
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo 105-8512, Japan
| | - Kengo Hanaya
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo 105-8512, Japan
| | - Takeshi Sugai
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo 105-8512, Japan
| | - Shuhei Higashibayashi
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo 105-8512, Japan
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10
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Guo P, Cheng LC, He X, Ye KY. Cobalt-catalyzed highly selective hydroxylation of organohydrosilanes and hydrosiloxanes. Org Chem Front 2022. [DOI: 10.1039/d2qo01294d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The highly selective and scalable dehydrogenative hydroxylation of hydrosilanes, featuring a low loading of the Earth-abundant cobalt catalyst, water as the green oxidant, and good generality for various hydrosilanes, is reported.
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Affiliation(s)
- Peng Guo
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University), College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Ling-Chao Cheng
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University), College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Xinglei He
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University), College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Ke-Yin Ye
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University), College of Chemistry, Fuzhou University, Fuzhou 350108, China
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11
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Murali K, Machado LA, Carvalho RL, Pedrosa LF, Mukherjee R, Da Silva Júnior EN, Maiti D. Decoding Directing Groups and Their Pivotal Role in C-H Activation. Chemistry 2021; 27:12453-12508. [PMID: 34038596 DOI: 10.1002/chem.202101004] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Indexed: 12/14/2022]
Abstract
Synthetic organic chemistry has witnessed a plethora of functionalization and defunctionalization strategies. In this regard, C-H functionalization has been at the forefront due to the multifarious applications in the development of simple to complex molecular architectures and holds a brilliant prospect in drug development and discovery. Despite been explored tremendously by chemists, this functionalization strategy still enjoys the employment of novel metal catalysts as well metal-free organic ligands. Moreover, the switch to photo- and electrochemistry has widened our understanding of the alternative pathways via which a reaction can proceed and these strategies have garnered prominence when applied to C-H activation. Synthetic chemists have been foraging for new directing groups and templates for the selective activation of C-H bonds from a myriad of carbon-hydrogen bonds in aromatic as well as aliphatic systems. As a matter of fact, by varying the templates and directing groups, scientists found the answer to the challenge of distal C-H bond activation which remained an obstacle for a very long time. These templates have been frequently harnessed for selectively activating C-H bonds of natural products, drugs, and macromolecules decorated with multiple C-H bonds. This itself was a challenge before the commencement of this field as functionalization of a site other than the targeted site could modify and hamper the biological activity of the pharmacophore. Total synthesis and pharmacophore development often faces the difficulty of superfluous reaction steps towards selective functionalization. This obstacle has been solved by late-stage functionalization simply by harnessing C-H bond activation. Moreover, green chemistry and metal-free reaction conditions have seen light in the past few decades due to the rising concern about environmental issues. Therefore, metal-free catalysts or the usage of non-toxic metals have been recently showcased in a number of elegant works. Also, research groups across the world are developing rational strategies for directing group free or non-directed protocols that are just guided by ligands. This review encapsulates the research works pertinent to C-H bond activation and discusses the science devoted to it at the fundamental level. This review gives the readers a broad understanding of how these strategies work, the execution of various metal catalysts, and directing groups. This not only helps a budding scientist towards the commencement of his/her research but also helps a matured mind searching out for selective functionalization. A detailed picture of this field and its progress with time has been portrayed in lucid scientific language with a motive to inculcate and educate scientific minds about this beautiful strategy with an overview of the most relevant and significant works of this era. The unique trait of this review is the detailed description and classification of various directing groups and their utility over a wide substrate scope. This allows an experimental chemist to understand the applicability of this domain and employ it over any targeted substrate.
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Affiliation(s)
- Karunanidhi Murali
- Department of Chemistry, Federal University of Minas Gerais, Belo Horizonte, 31270-901, MG, Brazil
| | - Luana A Machado
- Department of Chemistry, Federal University of Minas Gerais, Belo Horizonte, 31270-901, MG, Brazil.,Department of Chemistry, Fluminense Federal University, Niteroi, 24020-141, RJ, Brazil
| | - Renato L Carvalho
- Department of Chemistry, Federal University of Minas Gerais, Belo Horizonte, 31270-901, MG, Brazil
| | - Leandro F Pedrosa
- Department of Chemistry, Fluminense Federal University, Niteroi, 24020-141, RJ, Brazil
| | - Rishav Mukherjee
- Department of Chemistry IIT Bombay, Powai, Mumbai, 400076, India
| | | | - Debabrata Maiti
- Department of Chemistry IIT Bombay, Powai, Mumbai, 400076, India
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12
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Upadhyay P, Lali A. Engineered Pseudomonas putida for biosynthesis of catechol from lignin-derived model compounds and biomass hydrolysate. Prep Biochem Biotechnol 2021; 52:80-88. [PMID: 33870868 DOI: 10.1080/10826068.2021.1910960] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Catechol is an industrially relevant chemical with myriad applications. Its production via chemical route suffers from several drawbacks the major being a non-green and nonselective route. Currently, bio-based products using biocatalyst are gaining attention due to the growing environmental and health hazards concerns over the use of petroleum-derived feedstock. Lignocellulosic biomass serves as a promising feedstock. Lignin valorization is the demand of the current scenario which is complicated task by its complexity, heterogeneity and diversity of lignin structures posing limitations toward lignin valorization via chemical routes. There are several microorganisms that possess the ability to metabolize lignin monomers via their central metabolic pathways and this paves the way to the synthesis of a number of products. Pseudomonas putida KT2440 is one such organism and was chosen for genetic manipulations for catechol biosynthesis using lignin-derived model compounds and biomass hydrolysate stream comprising of various lignin monomers. Catechol production was engineered by diverting various lignin monomers and addressing the identified metabolic bottlenecks particularly vanillic acid accumulation toward catechol biosynthesis. The engineered strain could convert the model lignin monomers as well as monomers in the biomass hydrolysates to catechol and vanillic acid in more than 60% and 90% molar yields, respectively.
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Affiliation(s)
- Priya Upadhyay
- DBT-ICT Centre for Energy Biosciences, Institute of Chemical Technology, Mumbai, India
| | - Arvind Lali
- DBT-ICT Centre for Energy Biosciences, Institute of Chemical Technology, Mumbai, India.,Department of Chemical Engineering, Institute of Chemical Technology, Mumbai, India
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13
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Cao T, Shi Q, Zhu S. Benzene-Free Synthesis of Multisubstituted Catechol via Oxidative Dearomatic Reorganization. Org Lett 2021; 23:1411-1415. [PMID: 33560130 DOI: 10.1021/acs.orglett.1c00071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A benzene-free synthesis of multisubstituted catechol via an oxidative dearomatic reorganization is reported. This reaction tolerated a wide spectrum of functionalities, which could be applied in the synthesis of an electron-deficient arene-conjugated catechol that is difficult to access via biomimetic oxidative coupling. In addition, a diversification-oriented transformation that leveraged the versatile catechol afforded a series of functionality-rich products.
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Affiliation(s)
- Tongxiang Cao
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Qiu Shi
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Shifa Zhu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
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14
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Wu X, Yi S, Huang Y, Lin L, Tang Y, Feng P. An Easy Access to Pyrogallol Derivatives Using a Practical Auxiliary. ChemistrySelect 2021. [DOI: 10.1002/slct.202004270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xing Wu
- Department of Chemistry Jinan University Guangzhou 510632 China
| | - Songjian Yi
- Department of Chemistry Jinan University Guangzhou 510632 China
| | - Yifeng Huang
- Department of Chemistry Jinan University Guangzhou 510632 China
| | - Ling Lin
- Department of Chemistry Jinan University Guangzhou 510632 China
| | - Yu Tang
- Department of Chemistry Jinan University Guangzhou 510632 China
| | - Pengju Feng
- Department of Chemistry Jinan University Guangzhou 510632 China
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15
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Abstract
In recent years, Dakin oxidation has evolved primarily around the conversion of ortho- and para-hydroxy benzaldehydes and acetophenones to dihydric phenols, which are found in nature and complex organic materials.
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Affiliation(s)
- Porag Bora
- Department of Chemical Sciences, Tezpur University, Napaam, Sonitpur-784028, India
| | - Bondana Bora
- Department of Chemical Sciences, Tezpur University, Napaam, Sonitpur-784028, India
| | - Utpal Bora
- Department of Chemical Sciences, Tezpur University, Napaam, Sonitpur-784028, India
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16
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Zhang K, Yang L, Hu Y, Fan C, Zhao Y, Bai L, Li Y, Shi F, Liu J, Xie W. Synthesis of a Gold-Metal Oxide Core-Satellite Nanostructure for In Situ SERS Study of CuO-Catalyzed Photooxidation. Angew Chem Int Ed Engl 2020; 59:18003-18009. [PMID: 32602629 DOI: 10.1002/anie.202007462] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 06/28/2020] [Indexed: 11/09/2022]
Abstract
This work reports on an assembling-calcining method for preparing gold-metal oxide core-satellite nanostructures, which enable surface-enhanced Raman spectroscopic detection of chemical reactions on metal oxide nanoparticles. By using the nanostructure, we study the photooxidation of Si-H catalyzed by CuO nanoparticles. As evidenced by the in situ spectroscopic results, oxygen vacancies of CuO are found to be very active sites for oxygen activation, and hydroxide radicals (*OH) adsorbed at the catalytic sites are likely to be the reactive intermediates that trigger the conversion from silanes into the corresponding silanols. According to our finding, oxygen vacancy-rich CuO catalysts are confirmed to be of both high activity and selectivity in photooxidation of various silanes.
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Affiliation(s)
- Kaifu Zhang
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, College of Chemistry, Nankai University, Weijin Rd. 94, Tianjin, 300071, China
| | - Ling Yang
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, College of Chemistry, Nankai University, Weijin Rd. 94, Tianjin, 300071, China
| | - Yanfang Hu
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, College of Chemistry, Nankai University, Weijin Rd. 94, Tianjin, 300071, China
| | - Chenghao Fan
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, College of Chemistry, Nankai University, Weijin Rd. 94, Tianjin, 300071, China
| | - Yaran Zhao
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, College of Chemistry, Nankai University, Weijin Rd. 94, Tianjin, 300071, China
| | - Lu Bai
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, College of Chemistry, Nankai University, Weijin Rd. 94, Tianjin, 300071, China
| | - Yonglong Li
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, College of Chemistry, Nankai University, Weijin Rd. 94, Tianjin, 300071, China
| | - Faxing Shi
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, College of Chemistry, Nankai University, Weijin Rd. 94, Tianjin, 300071, China
| | - Jun Liu
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, College of Chemistry, Nankai University, Weijin Rd. 94, Tianjin, 300071, China
| | - Wei Xie
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, College of Chemistry, Nankai University, Weijin Rd. 94, Tianjin, 300071, China
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17
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Shetgaonkar SE, Singh FV. Hypervalent Iodine Reagents in Palladium-Catalyzed Oxidative Cross-Coupling Reactions. Front Chem 2020; 8:705. [PMID: 33134246 PMCID: PMC7553084 DOI: 10.3389/fchem.2020.00705] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 07/09/2020] [Indexed: 01/12/2023] Open
Abstract
Hypervalent iodine compounds are valuable and versatile reagents in synthetic organic chemistry, generating a diverse array of useful organic molecules. Owing to their non-toxic and environmentally friendly features, these reagents find potential applications in various oxidative functionalization reactions. In recent years, the use of hypervalent iodine reagents in palladium-catalyzed transformations has been widely studied as they are strong electrophiles and powerful oxidizing agents. For instance, extensive work has been carried out in the field of C–H bond functionalization via Pd-catalysis using hypervalent iodine reagents as oxidants. In addition, nowadays, iodine(III) reagents have been frequently employed as arylating agents in Pd-catalyzed C–H arylation or Heck-type cross-coupling reactions. In this review, recent advancements in the area of palladium-catalyzed oxidative cross-coupling reactions using hypervalent iodine reagents are summarized in detail.
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Affiliation(s)
- Samata E Shetgaonkar
- Chemistry Division, School of Advanced Science, Vellore Institute of Technology, Chennai, India
| | - Fateh V Singh
- Chemistry Division, School of Advanced Science, Vellore Institute of Technology, Chennai, India
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18
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Begum SA, Hira K, Pal PP, Nessa S, Kulkarni OP, Danaraj J, Shaik AB, Araya H, Fujimoto Y. Halodule pinifolia (Seagrass) attenuated lipopolysaccharide-, carrageenan-, and crystal-induced secretion of pro-inflammatory cytokines: mechanism and chemistry. Inflammopharmacology 2020; 29:253-267. [PMID: 32918703 DOI: 10.1007/s10787-020-00747-x] [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: 04/18/2020] [Accepted: 08/25/2020] [Indexed: 01/21/2023]
Abstract
OBJECTIVES The study aimed to explore the anti-inflammatory effect, underlying mechanism, and chemistry of Halodule pinifolia extract. METHODS The ethyl acetate (EHP) and methanol (MHP) extracts of Halodule pinifolia were screened for pro-inflammatory cytokine inhibition effect under various in vitro (LPSand crystal-induced inflammation) and in vivo models (LPS-induced endotoxaemia model, carrageenan-induced paw oedema model, and oxalate-induced renal nephropathy model of inflammation). The effect of EHP on the expression of inflammatory markers using western blot analysis (in vitro) was investigated. Chemical constituents of bioactive EHP were isolated through chromatography and characterised using NMR spectroscopy. Furthermore, EHP was standardised for rosmarinic acid, vanillic acid, and ethyl protocatechuate using HPLC. Also, total phytosterols, phenolic, and flavonoid content of EHP were determined by UV spectroscopy. KEY FINDINGS EHP was comparatively more effective than MHP in inhibiting cytokines secretions under LPS-induced in vitro models. Furthermore, EHP was screened under endotoxaemia in vivo model, EHP (250 mg/kg) reduced plasma IL-6, TNF-α, and IL-1β levels by 88.3%, 78.2%, and 74.5%, respectively. In the carrageenan-induced oedema model, EHP (200 mg/kg) reduced paw volume and release of TNF-α (69.3%) and IL-1β (43.1%). EHP (200 mg/kg) further controlled renal nephropathy by inhibiting plasma IL-1β and BUN levels. Also, a significant reduction of mRNA expressions of TNF-α and IL-1β and KIM-1 in renal tissues was observed. Through western blot, EHP was identified to regulate the expression of pro-form as well as mature-form of IL-1β and caspase-1. EHP constituted rosmarinic acid (RA), vanillic acid (VA), ethyl protocatechuate (EP), sitosterol, stigmasterol, campesterol, and dihydrobrassicasterol. It was determined that 4.6 mg/g of RA, 2.92 mg/g of VA, 0.76 mg/g of EP, 21.7 mg/g of total phenolics, 29.8 mg/g of total flavonoids, and 48.2 mg/g of total phytosterols were present in dry EHP. The presence of anti-inflammatory constituents such as RA, VA, and PE in EHP corroborated the in vitro and in vivo anti-inflammatory activity of EHP. CONCLUSION The anti-inflammatory property of EHP and its action through attenuation of pan-cytokines suggest that it can be developed into an oral pharmaceutical drug.
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Affiliation(s)
- Sajeli Ahil Begum
- Department of Pharmacy, Birla Institute of Technology and Science Pilani Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Hyderabad, Telangana, 500 078, India.
| | - Kirti Hira
- Department of Pharmacy, Birla Institute of Technology and Science Pilani Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Hyderabad, Telangana, 500 078, India
| | - Pragya Paramita Pal
- Department of Pharmacy, Birla Institute of Technology and Science Pilani Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Hyderabad, Telangana, 500 078, India
| | - Samrun Nessa
- Department of Pharmacy, Birla Institute of Technology and Science Pilani Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Hyderabad, Telangana, 500 078, India
| | - Onkar P Kulkarni
- Department of Pharmacy, Birla Institute of Technology and Science Pilani Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Hyderabad, Telangana, 500 078, India
| | - Jeyapragash Danaraj
- Centre of Advanced Study in Marine Biology, Faculty of Marine Sciences, Annamalai University, Parangipettai, Tamil Nadu, 608 502, India
| | - Ameer Basha Shaik
- Department of Plant Pathology, College of Agriculture, Professor Jayashankar Telangana State Agricultural University, Rajendra Nagar, Hyderabad, Telangana, 500 030, India
| | - Hiroshi Araya
- School of Agriculture, Meiji University, Kawasaki, Kanagawa, 214-8571, Japan
| | - Yoshinori Fujimoto
- School of Agriculture, Meiji University, Kawasaki, Kanagawa, 214-8571, Japan
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19
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Zhang K, Yang L, Hu Y, Fan C, Zhao Y, Bai L, Li Y, Shi F, Liu J, Xie W. Synthesis of a Gold–Metal Oxide Core–Satellite Nanostructure for In Situ SERS Study of CuO‐Catalyzed Photooxidation. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007462] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Kaifu Zhang
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education) Renewable Energy Conversion and Storage Center College of Chemistry Nankai University Weijin Rd. 94 Tianjin 300071 China
| | - Ling Yang
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education) Renewable Energy Conversion and Storage Center College of Chemistry Nankai University Weijin Rd. 94 Tianjin 300071 China
| | - Yanfang Hu
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education) Renewable Energy Conversion and Storage Center College of Chemistry Nankai University Weijin Rd. 94 Tianjin 300071 China
| | - Chenghao Fan
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education) Renewable Energy Conversion and Storage Center College of Chemistry Nankai University Weijin Rd. 94 Tianjin 300071 China
| | - Yaran Zhao
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education) Renewable Energy Conversion and Storage Center College of Chemistry Nankai University Weijin Rd. 94 Tianjin 300071 China
| | - Lu Bai
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education) Renewable Energy Conversion and Storage Center College of Chemistry Nankai University Weijin Rd. 94 Tianjin 300071 China
| | - Yonglong Li
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education) Renewable Energy Conversion and Storage Center College of Chemistry Nankai University Weijin Rd. 94 Tianjin 300071 China
| | - Faxing Shi
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education) Renewable Energy Conversion and Storage Center College of Chemistry Nankai University Weijin Rd. 94 Tianjin 300071 China
| | - Jun Liu
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education) Renewable Energy Conversion and Storage Center College of Chemistry Nankai University Weijin Rd. 94 Tianjin 300071 China
| | - Wei Xie
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education) Renewable Energy Conversion and Storage Center College of Chemistry Nankai University Weijin Rd. 94 Tianjin 300071 China
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20
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Hu QL, Hou KQ, Li J, Ge Y, Song ZD, Chan ASC, Xiong XF. Silanol: a bifunctional group for peptide synthesis and late-stage functionalization. Chem Sci 2020; 11:6070-6074. [PMID: 34094099 PMCID: PMC8159358 DOI: 10.1039/d0sc02439b] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 05/24/2020] [Indexed: 12/27/2022] Open
Abstract
Chemical modification of a specific amino acid residue on peptides represents an efficient strategy to improve their pharmacokinetics and facilitates the potential to achieve post-synthetic diversification of peptides. Herein, we reported the first Pd-catalyzed late-stage ortho-olefination of Tyr residues on peptides with high chemo- and site-selectivity, by employing the easily attached and removable silanol as a bifunctional protecting group and directing group. Up to hexapeptides with variation on amino acid sequences or locations of the Tyr residue and different olefins were compatible with this protocol, which enriched the chemical toolbox for late-stage modification via C(sp2)-H functionalization. Furthermore, the orthogonal protection strategies of Tyr were also developed and could be applied to SPPS.
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Affiliation(s)
- Qi-Long Hu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University 510006 Guangzhou Guangdong P. R. China
| | - Ke-Qiang Hou
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University 510006 Guangzhou Guangdong P. R. China
| | - Jian Li
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University 510006 Guangzhou Guangdong P. R. China
| | - Yang Ge
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University 510006 Guangzhou Guangdong P. R. China
| | - Zhen-Dong Song
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University 510006 Guangzhou Guangdong P. R. China
| | - Albert S C Chan
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University 510006 Guangzhou Guangdong P. R. China
| | - Xiao-Feng Xiong
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University 510006 Guangzhou Guangdong P. R. China
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21
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Khaef S, Rostami A, Khakyzadeh V, Zolfigol MA, Taherpour AA, Yarie M. Regioselective Ortho‐C H sulfenylation of free phenols catalyzed by Co(II)-immobilized on silica-coated magnetic nanoparticles. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.110772] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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22
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Gou Q, Tan X, Zhang M, Ran M, Yuan T, He S, Zhou L, Cao T, Luo F. Cobalt-Catalyzed C-H Acetoxylation of Phenols with Removable Monodentate Directing Groups: Access to Pyrocatechol Derivatives. Org Lett 2020; 22:1966-1971. [PMID: 32073867 DOI: 10.1021/acs.orglett.0c00312] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
An efficient cobalt-catalyzed C-H acetoxylation of phenols has been developed by using PIDA (phenyliodine diacetate) as a sole acetoxy source to synthesize pyrocatechol derivatives for the first time. The key feature of this method is the use of earth-abundant metal cobalt as the green and inexpensive catalyst for the acetoxylation of C(sp2)-H bonds under neutral reaction conditions. Furthermore, the gram-scale reaction and late-stage functionalization demonstrated the usefulness of this method.
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Affiliation(s)
- Quan Gou
- School of Chemistry and Chemical Engineering, Laboratory of Natural Medicine Research and Development in Wuling Mountain, Yangtze Normal University, Chongqing 408100, China
| | - Xiaoping Tan
- School of Chemistry and Chemical Engineering, Laboratory of Natural Medicine Research and Development in Wuling Mountain, Yangtze Normal University, Chongqing 408100, China
| | - Mingzhong Zhang
- School of Chemistry and Chemical Engineering, Laboratory of Natural Medicine Research and Development in Wuling Mountain, Yangtze Normal University, Chongqing 408100, China
| | - Man Ran
- School of Chemistry and Chemical Engineering, Laboratory of Natural Medicine Research and Development in Wuling Mountain, Yangtze Normal University, Chongqing 408100, China
| | - Tengrui Yuan
- Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, 9000 Gent, Belgium
| | - Shuhua He
- School of Chemistry and Chemical Engineering, Laboratory of Natural Medicine Research and Development in Wuling Mountain, Yangtze Normal University, Chongqing 408100, China
| | - Linzong Zhou
- School of Geographical Science and Tourism Management, Chuxiong Normal University, Chuxiong 675000, China
| | - Tuanwu Cao
- School of Chemistry and Chemical Engineering, Laboratory of Natural Medicine Research and Development in Wuling Mountain, Yangtze Normal University, Chongqing 408100, China
| | - Feihua Luo
- College of Materials Science and Engineering, Yangtze Normal University, Chongqing 408100, China
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23
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Yun YL, Yang J, Miao YH, Sun J, Wang XJ. Recent advances in Palladium(II)-catalyzed activation of aromatic ring C–H bonds. JOURNAL OF SAUDI CHEMICAL SOCIETY 2020. [DOI: 10.1016/j.jscs.2020.01.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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24
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Al Mamari HH, Štefane B, Žugelj HB. Metal-catalyzed C–H bond functionalization of phenol derivatives. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.130925] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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25
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Sang R, Korkis SE, Su W, Ye F, Engl PS, Berger F, Ritter T. Site-Selective C-H Oxygenation via Aryl Sulfonium Salts. Angew Chem Int Ed Engl 2019; 58:16161-16166. [PMID: 31475767 PMCID: PMC7754133 DOI: 10.1002/anie.201908718] [Citation(s) in RCA: 119] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Revised: 08/14/2019] [Indexed: 02/04/2023]
Abstract
Herein, we report a two-step process forming arene C-O bonds in excellent site-selectivity at a late-stage. The C-O bond formation is achieved by selective introduction of a thianthrenium group, which is then converted into C-O bonds using photoredox chemistry. Electron-rich, -poor and -neutral arenes as well as complex drug-like small molecules are successfully transformed into both phenols and various ethers. The sequence differs conceptually from all previous arene oxygenation reactions in that oxygen functionality can be incorporated into complex small molecules at a late stage site-selectively, which has not been shown via aryl halides.
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Affiliation(s)
- Ruocheng Sang
- Max-Planck-Institut für KohlenforschungKaiser-Wilhelm-Platz 145470Mülheim an der RuhrGermany
| | - Stamatis E. Korkis
- Max-Planck-Institut für KohlenforschungKaiser-Wilhelm-Platz 145470Mülheim an der RuhrGermany
| | - Wanqi Su
- Max-Planck-Institut für KohlenforschungKaiser-Wilhelm-Platz 145470Mülheim an der RuhrGermany
| | - Fei Ye
- Max-Planck-Institut für KohlenforschungKaiser-Wilhelm-Platz 145470Mülheim an der RuhrGermany
| | - Pascal S. Engl
- Max-Planck-Institut für KohlenforschungKaiser-Wilhelm-Platz 145470Mülheim an der RuhrGermany
| | - Florian Berger
- Max-Planck-Institut für KohlenforschungKaiser-Wilhelm-Platz 145470Mülheim an der RuhrGermany
| | - Tobias Ritter
- Max-Planck-Institut für KohlenforschungKaiser-Wilhelm-Platz 145470Mülheim an der RuhrGermany
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26
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Xu X, Luo J. Transition Metal-Catalyzed Directing-Group-Assisted C-H Activation of Phenols. CHEMSUSCHEM 2019; 12:4601-4616. [PMID: 31418536 DOI: 10.1002/cssc.201901951] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 08/14/2019] [Indexed: 05/08/2023]
Abstract
Strategies that exploit directing groups to control the site selectivity in the C-H activation of arenes have received much attention during the past two decades. In light of the importance of phenol derivatives in the areas of pharmaceuticals, agrochemicals, and materials science, transition-metal-catalyzed C-H activation of phenols has proven to be an extremely useful tool in organic synthesis. This Minireview summarizes the current state-of-the-art direct C-H activation of phenol derivatives under transition-metal catalysis.
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Affiliation(s)
- Xing Xu
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, 315211, P. R. China
| | - Junfei Luo
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, 315211, P. R. China
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27
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Sang R, Korkis SE, Su W, Ye F, Engl PS, Berger F, Ritter T. Site‐Selective C−H Oxygenation via Aryl Sulfonium Salts. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908718] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ruocheng Sang
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Stamatis E. Korkis
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Wanqi Su
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Fei Ye
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Pascal S. Engl
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Florian Berger
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Tobias Ritter
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
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Baschieri A, Amorati R, Valgimigli L, Sambri L. 1-Methyl-1,4-cyclohexadiene as a Traceless Reducing Agent for the Synthesis of Catechols and Hydroquinones. J Org Chem 2019; 84:13655-13664. [DOI: 10.1021/acs.joc.9b01898] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Andrea Baschieri
- Dipartimento di Chimica “G. Ciamician”, Università di Bologna, Via S. Giacomo 11, 40126 Bologna, Italy
| | - Riccardo Amorati
- Dipartimento di Chimica “G. Ciamician”, Università di Bologna, Via S. Giacomo 11, 40126 Bologna, Italy
| | - Luca Valgimigli
- Dipartimento di Chimica “G. Ciamician”, Università di Bologna, Via S. Giacomo 11, 40126 Bologna, Italy
| | - Letizia Sambri
- Dipartimento di Chimica Industriale “T. Montanari”Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
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29
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Takamatsu K, Hayashi Y, Kawauchi S, Hirano K, Miura M. Copper-Catalyzed Regioselective C–H Amination of Phenol Derivatives with Assistance of Phenanthroline-Based Bidentate Auxiliary. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01145] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Kazutaka Takamatsu
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yoshihiro Hayashi
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Susumu Kawauchi
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Koji Hirano
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Masahiro Miura
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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30
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Li X, Shen X, Wang J, Ri HI, Mi CY, Yan Y, Sun X, Yuan Q. Efficient biosynthesis of 3, 4-dihydroxyphenylacetic acid in Escherichia coli. J Biotechnol 2019; 294:14-18. [DOI: 10.1016/j.jbiotec.2019.01.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 01/21/2019] [Accepted: 01/23/2019] [Indexed: 01/15/2023]
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31
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Zhu Z, Salnikov GE, Koltunov KY. Cascade reaction of 2,3-naphthalenediol with benzene in the presence of aluminum halides. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.02.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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32
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Chen R, Zeng L, Lai Z, Cui S. Iridium-Catalyzed Hydroxyl-Enabled Cycloaddition of Azides and Alkynes. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801410] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Renjie Chen
- Institute of Drug Discovery and Design, College of Pharmaceutical Sciences; Zhejiang University; Hangzhou 310058 People's Republic of China
| | - Linwei Zeng
- Institute of Drug Discovery and Design, College of Pharmaceutical Sciences; Zhejiang University; Hangzhou 310058 People's Republic of China
| | - Zhencheng Lai
- Institute of Drug Discovery and Design, College of Pharmaceutical Sciences; Zhejiang University; Hangzhou 310058 People's Republic of China
| | - Sunliang Cui
- Institute of Drug Discovery and Design, College of Pharmaceutical Sciences; Zhejiang University; Hangzhou 310058 People's Republic of China
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Affiliation(s)
- Zheng Huang
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 0B8, Canada
| | - Jean-Philip Lumb
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 0B8, Canada
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Abstract
Synthetic methods for oxidative aromatic C-O bond formation are sparse, despite their demand in metabolite synthesis for drug discovery and development. We report a novel methodology for late-stage C-O bond formation of arenes. The reaction proceeds with excellent functional group tolerance even for highly functionalized substrates. The resulting aryl mesylates provide access to potential human metabolites of pharmaceuticals, and may be used directly to install a C-F bond to block metabolic hotspots. A charge-transfer interaction between the reagent bis(methanesulfonyl) peroxide and the substrate arenes may be relevant for the chemoselective functionalization of arenes over other functional groups.
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Affiliation(s)
- Jonas Börgel
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , D-45470 Mülheim an der Ruhr , Germany
| | - Lalita Tanwar
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , D-45470 Mülheim an der Ruhr , Germany
| | - Florian Berger
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , D-45470 Mülheim an der Ruhr , Germany
| | - Tobias Ritter
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , D-45470 Mülheim an der Ruhr , Germany
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35
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Sambiagio C, Schönbauer D, Blieck R, Dao-Huy T, Pototschnig G, Schaaf P, Wiesinger T, Zia MF, Wencel-Delord J, Besset T, Maes BUW, Schnürch M. A comprehensive overview of directing groups applied in metal-catalysed C-H functionalisation chemistry. Chem Soc Rev 2018; 47:6603-6743. [PMID: 30033454 PMCID: PMC6113863 DOI: 10.1039/c8cs00201k] [Citation(s) in RCA: 1097] [Impact Index Per Article: 182.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Indexed: 12/20/2022]
Abstract
The present review is devoted to summarizing the recent advances (2015-2017) in the field of metal-catalysed group-directed C-H functionalisation. In order to clearly showcase the molecular diversity that can now be accessed by means of directed C-H functionalisation, the whole is organized following the directing groups installed on a substrate. Its aim is to be a comprehensive reference work, where a specific directing group can be easily found, together with the transformations which have been carried out with it. Hence, the primary format of this review is schemes accompanied with a concise explanatory text, in which the directing groups are ordered in sections according to their chemical structure. The schemes feature typical substrates used, the products obtained as well as the required reaction conditions. Importantly, each example is commented on with respect to the most important positive features and drawbacks, on aspects such as selectivity, substrate scope, reaction conditions, directing group removal, and greenness. The targeted readership are both experts in the field of C-H functionalisation chemistry (to provide a comprehensive overview of the progress made in the last years) and, even more so, all organic chemists who want to introduce the C-H functionalisation way of thinking for a design of straightforward, efficient and step-economic synthetic routes towards molecules of interest to them. Accordingly, this review should be of particular interest also for scientists from industrial R&D sector. Hence, the overall goal of this review is to promote the application of C-H functionalisation reactions outside the research groups dedicated to method development and establishing it as a valuable reaction archetype in contemporary R&D, comparable to the role cross-coupling reactions play to date.
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Affiliation(s)
- Carlo Sambiagio
- Organic Synthesis (ORSY)
, Department of Chemistry
, University of Antwerp
,
Groenenborgerlaan 171
, 2020 Antwerp
, Belgium
| | - David Schönbauer
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Remi Blieck
- Normandie Univ
, INSA Rouen
, UNIROUEN
, CNRS
, COBRA (UMR 6014)
,
76000 Rouen
, France
| | - Toan Dao-Huy
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Gerit Pototschnig
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Patricia Schaaf
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Thomas Wiesinger
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Muhammad Farooq Zia
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Joanna Wencel-Delord
- Laboratoire de Chimie Moléculaire (UMR CNRS 7509)
, Université de Strasbourg
,
ECPM 25 Rue Becquerel
, 67087 Strasbourg
, France
| | - Tatiana Besset
- Normandie Univ
, INSA Rouen
, UNIROUEN
, CNRS
, COBRA (UMR 6014)
,
76000 Rouen
, France
| | - Bert U. W. Maes
- Organic Synthesis (ORSY)
, Department of Chemistry
, University of Antwerp
,
Groenenborgerlaan 171
, 2020 Antwerp
, Belgium
| | - Michael Schnürch
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
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36
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Wang J, Li B, Liu LC, Jiang C, He T, He W. Metal-free visible-light-mediated aerobic oxidation of silanes to silanols. Sci China Chem 2018. [DOI: 10.1007/s11426-018-9289-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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37
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Synthesis, characterization and catalytic oxidation of organosilanes with a novel multilayer polyoxomolybdate containing mixed-valence antimony. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2018.04.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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38
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Cao T, Kong Y, Luo K, Chen L, Zhu S. Cascade Claisen Rearrangement: Rapid Synthesis of Polysubstituted Salicylaldehydes and Total Syntheses of Hemigossypol and Gossypol. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201801612] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Tongxiang Cao
- School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 China
| | - Yi Kong
- School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 China
| | - Kui Luo
- School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 China
| | - Lianfen Chen
- School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 China
| | - Shifa Zhu
- School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 China
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39
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Cao T, Kong Y, Luo K, Chen L, Zhu S. Cascade Claisen Rearrangement: Rapid Synthesis of Polysubstituted Salicylaldehydes and Total Syntheses of Hemigossypol and Gossypol. Angew Chem Int Ed Engl 2018; 57:8702-8707. [DOI: 10.1002/anie.201801612] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 03/11/2018] [Indexed: 12/29/2022]
Affiliation(s)
- Tongxiang Cao
- School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 China
| | - Yi Kong
- School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 China
| | - Kui Luo
- School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 China
| | - Lianfen Chen
- School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 China
| | - Shifa Zhu
- School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 China
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40
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Wu K, Cao B, Zhou CY, Che CM. RhII
-Catalyzed Intermolecular C−H Arylation of Aromatics with Diazo Quinones. Chemistry 2018; 24:4815-4819. [DOI: 10.1002/chem.201800648] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Indexed: 01/25/2023]
Affiliation(s)
- Kai Wu
- State Key Laboratory of Synthetic Chemistry and; Department of Chemistry; The University of Hong Kong; Hong Kong P. R. China
| | - Bei Cao
- State Key Laboratory of Synthetic Chemistry and; Department of Chemistry; The University of Hong Kong; Hong Kong P. R. China
| | - Cong-Ying Zhou
- State Key Laboratory of Synthetic Chemistry and; Department of Chemistry; The University of Hong Kong; Hong Kong P. R. China
- HKU Shenzhen Institute of Research and Innovation; Shenzhen, Guangdong 518053 P. R. China
| | - Chi-Ming Che
- State Key Laboratory of Synthetic Chemistry and; Department of Chemistry; The University of Hong Kong; Hong Kong P. R. China
- HKU Shenzhen Institute of Research and Innovation; Shenzhen, Guangdong 518053 P. R. China
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41
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Posevins D, Qiu Y, Bäckvall JE. Highly Diastereoselective Palladium-Catalyzed Oxidative Carbocyclization of Enallenes Assisted by a Weakly Coordinating Hydroxyl Group. J Am Chem Soc 2018; 140:3210-3214. [PMID: 29425445 DOI: 10.1021/jacs.7b13563] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A highly diastereoselective palladium-catalyzed oxidative carbocyclization-borylation of enallenes assisted by a weakly coordinating hydroxyl group was developed. The reaction afforded functionalized cyclohexenol derivatives, in which the 1,3-relative stereochemistry is controlled (d.r. > 50:1). Other weakly coordinating oxygen-containing groups (ketone, alkoxide, acetate) also assisted the carbocyclization toward cyclohexenes. The reaction proceeds via a ligand exchange on Pd of the weakly coordinating group with a distant olefin group. The high diastereoselectivity of the hydroxyl-directed reaction could be rationalized by a face-selective coordination of the distant olefin. It was demonstrated that the primary coordination of the close-by oxygen-containing functionality was necessary for the reaction to occur and removal of this functionality shut down the reaction.
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Affiliation(s)
- Daniels Posevins
- Department of Organic Chemistry, Arrhenius Laboratory , Stockholm University , SE-106 91 Stockholm , Sweden
| | - Youai Qiu
- Department of Organic Chemistry, Arrhenius Laboratory , Stockholm University , SE-106 91 Stockholm , Sweden
| | - Jan-E Bäckvall
- Department of Organic Chemistry, Arrhenius Laboratory , Stockholm University , SE-106 91 Stockholm , Sweden
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42
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Kong C, Huang H, Xue Y, Liu Y, Peng Q, Liu Q, Xu Q, Zhu Q, Yin Y, Zhou X, Zhang Y, Cai M. Heterologous pathway assembly reveals molecular steps of fungal terreic acid biosynthesis. Sci Rep 2018; 8:2116. [PMID: 29391515 PMCID: PMC5794859 DOI: 10.1038/s41598-018-20514-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 01/19/2018] [Indexed: 12/11/2022] Open
Abstract
Terreic acid is a potential anticancer drug as it inhibits Bruton's tyrosine kinase; however, its biosynthetic molecular steps remain unclear. In this work, the individual reactions of terreic acid biosynthesis were determined by stepwise pathway assembly in a heterologous host, Pichia pastoris, on the basis of previous knockout studies in a native host, Aspergillus terreus. Polyketide synthase AtX was found to catalyze the formation of partially reduced polyketide 6-methylsalicylic acid, followed by 3-methylcatechol synthesis by salicylate 1-monooxygenase AtA-mediated decarboxylative hydroxylation of 6-methylsalicylic acid. Our results show that cytochrome P450 monooxygenase AtE hydroxylates 3-methylcatechol, thus producing the next product, 3-methyl-1,2,4-benzenetriol. A smaller putative cytochrome P450 monooxygenase, AtG, assists with this step. Then, AtD causes epoxidation and hydroxyl oxidation of 3-methyl-1,2,4-benzenetriol and produces a compound terremutin, via which the previously unknown function of AtD was identified as cyclooxygenation. The final step involves an oxidation reaction of a hydroxyl group by a glucose-methanol-choline oxidoreductase, AtC, which leads to the final product: terreic acid. Functions of AtD and AtG were determined for the first time. All the genes were reanalyzed and all intermediates and final products were isolated and identified. Our model fully defines the molecular steps and corrects previous results from the literature.
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Affiliation(s)
- Chuixing Kong
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Hezhou Huang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Ying Xue
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Yiqi Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Qiangqiang Peng
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Qi Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Qin Xu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Qiaoyun Zhu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Ying Yin
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Xiangshan Zhou
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Yuanxing Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
- Shanghai Collaborative Innovation Center for Biomanufacturing, 130 Meilong Road, Shanghai, 200237, China
| | - Menghao Cai
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China.
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43
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Yan YT, Gao W, Jin B, Shan DS, Peng RF, Chu SJ. Palladium-Catalyzed Reaction of [60]Fullerene with Aroyl Compounds via Enolate-Mediated sp2 C–H Bond Activation and Hydroxylation. J Org Chem 2018; 83:672-683. [DOI: 10.1021/acs.joc.7b02620] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yi-Teng Yan
- State
Key Laboratory Cultivation Base for Nonmetal Composites and Functional
Materials, Southwest University of Science and Technology, Mianyang, Sichuan 621010, P. R. China
| | - Wei Gao
- State
Key Laboratory Cultivation Base for Nonmetal Composites and Functional
Materials, Southwest University of Science and Technology, Mianyang, Sichuan 621010, P. R. China
| | - Bo Jin
- State
Key Laboratory Cultivation Base for Nonmetal Composites and Functional
Materials, Southwest University of Science and Technology, Mianyang, Sichuan 621010, P. R. China
- Department
of Chemistry, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
| | - Dong-Shi Shan
- State
Key Laboratory Cultivation Base for Nonmetal Composites and Functional
Materials, Southwest University of Science and Technology, Mianyang, Sichuan 621010, P. R. China
| | - Ru-Fang Peng
- State
Key Laboratory Cultivation Base for Nonmetal Composites and Functional
Materials, Southwest University of Science and Technology, Mianyang, Sichuan 621010, P. R. China
- Department
of Chemistry, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
| | - Shi-Jin Chu
- State
Key Laboratory Cultivation Base for Nonmetal Composites and Functional
Materials, Southwest University of Science and Technology, Mianyang, Sichuan 621010, P. R. China
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44
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Baruah S, Puzari A. Development of a new methodology for the synthesis of chloro(glycinato)1,10-phenanthroline copper(II) monohydrate and analogous complexes and study of their catalytic utility towards selective hydroxylation of phenol. INORG NANO-MET CHEM 2017. [DOI: 10.1080/24701556.2017.1357607] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- S. Baruah
- Department of Chemistry, National Institute of Technology Nagaland, Chumukedima, Dimapur, India
| | - A. Puzari
- Department of Chemistry, National Institute of Technology Nagaland, Chumukedima, Dimapur, India
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45
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Taneja N, Peddinti RK. Catalyst-Free Sulfonylation of 2-Methoxyphenols: Facile One-Pot Synthesis of (Arylsulfonyl)catechols in Aqueous Media. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701038] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Neha Taneja
- Department of Chemistry; Indian Institute of Technology, Roorkee; 247667 Roorkee Uttarakhand India
| | - Rama Krishna Peddinti
- Department of Chemistry; Indian Institute of Technology, Roorkee; 247667 Roorkee Uttarakhand India
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46
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Parasram M, Gevorgyan V. Silicon-Tethered Strategies for C-H Functionalization Reactions. Acc Chem Res 2017; 50:2038-2053. [PMID: 28771325 DOI: 10.1021/acs.accounts.7b00306] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Selective and efficient functionalization of ubiquitous C-H bonds is the Holy Grail of organic synthesis. Most advances in this area rely on employment of strongly or weakly coordinating directing groups (DGs) which have proven effective for transition-metal-catalyzed functionalization of C(sp2)-H and C(sp3)-H bonds. Although most directing groups are important functionalities in their own right, in certain cases, the DGs become static entities that possess very little synthetic leverage. Moreover, some of the DGs employed are cumbersome or unpractical to remove, which precludes the use of this approach in synthesis. It is believed, that development of a set of easily installable and removable/modifiable DGs for C-H functionalization would add tremendous value to the growing area of directed functionalization, and hence would promote its use in synthesis and late-stage functionalization of complex molecules. In particular, silicon tethers have long provided leverage in organic synthesis as easily installable and removable/modifiable auxiliaries for a variety of processes, including radical transformations, cycloaddition reactions, and a number of TM-catalyzed methods, including ring-closing metathesis (RCM) and cross-coupling reactions. Employment of Si-tethers is highly attractive for several reasons: (1) they are easy to handle/synthesize and are relatively stable; (2) they utilize cheap and abundant silicon precursors; and (3) Si-tethers are easily installable and removable/modifiable. Hence, development of Si-tethers for C-H functionalization reactions is appealing not only from a practical but also from a synthetic standpoint, since the Si-tether can provide an additional handle for diversification of organic molecules post-C-H functionalization. Over the past few years, we developed a set of Si-tether approaches for C-H functionalization reactions. The developed Si-tethers can be categorized into four types: (Type-1) Si-tethers possessing a reacting group, where the reacting group is delivered to the site of functionalization; (Type-2) Si-tethers possessing a DG, designed for selective C(sp2)-H functionalization of arenes; (Type-3) reactive Si-tethers for C-H silylation of organic molecules; and finally, (Type-4) reactive Si-tethers containing a DG, developed for selective C-H silylation/hydroxylation of challenging C(sp3)-H bonds. In this Account, we outline our advances on the employment of silicon auxiliaries for directed C-H functionalization reactions. The discussion of the strategies for employment of different Si-tethers, functionalization/modification of silicon tethers, and the methodological developments on C-C, C-X, C-O, and C-Si bond forming reactions via silicon tethers will also be presented. While the work described herein presents a substantial advance for the area of C-H functionalization, challenges still remain. The use of noble metals are required for the C-H functionalization methods presented herein. Also, the need for stoichiometric use of high molecular weight silicon auxiliaries is a shortcoming of the presented concept.
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Affiliation(s)
- Marvin Parasram
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Vladimir Gevorgyan
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
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47
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Kroc MA, Patil A, Carlos A, Ballantine J, Aguilar S, Mo DL, Wang HY, Mueller DS, Wink DJ, Anderson LL. Synthesis of α-oxygenated ketones and substituted catechols via the rearrangement of N-enoxy- and N-aryloxyphthalimides. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.01.061] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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48
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Lin Y, Jiang KZ, Cao J, Zheng ZJ, Xu Z, Cui YM, Xu LW. Iridium-Catalyzed Intramolecular C-H Silylation of Siloxane-Tethered Arene and Hydrosilane: Facile and Catalytic Synthesis of Cyclic Siloxanes. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700160] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Yan Lin
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Ke-Zhi Jiang
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Jian Cao
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Zhan-Jiang Zheng
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Zheng Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Yu-Ming Cui
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Li-Wen Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
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49
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Kamei T, Uryu M, Shimada T. Cu-Catalyzed Aerobic Oxidative C-H/C-O Cyclization of 2,2'-Binaphthols: Practical Synthesis of PXX Derivatives. Org Lett 2017; 19:2714-2717. [PMID: 28481101 DOI: 10.1021/acs.orglett.7b01060] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cu-catalyzed C-H/C-O cyclization of 2,2'-binaphthol, using air as an oxidant, was developed. C-H functionalization of binaphthols occurred at the 8,8'-position to form peri-xanthenoxanthenes that exhibit high charge-carrier mobility. The reaction can tolerate a wide variety of functional groups and afforded the corresponding peri-xanthenoxanthene derivatives via an efficient procedure.
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Affiliation(s)
- Toshiyuki Kamei
- Department of Chemical Engineering, Nara National College of Technology , 22 Yata-cho, Yamatokoriyama, Nara 639-1080, Japan
| | - Mizuho Uryu
- Department of Chemical Engineering, Nara National College of Technology , 22 Yata-cho, Yamatokoriyama, Nara 639-1080, Japan
| | - Toyoshi Shimada
- Department of Chemical Engineering, Nara National College of Technology , 22 Yata-cho, Yamatokoriyama, Nara 639-1080, Japan
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50
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Esguerra KVN, Lumb JP. Synthesis of ortho
-Azophenols by Formal Dehydrogenative Coupling of Phenols and Hydrazines or Hydrazides. Chemistry 2017; 23:8596-8600. [DOI: 10.1002/chem.201701226] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2017] [Indexed: 01/13/2023]
Affiliation(s)
| | - Jean-Philip Lumb
- Department of Chemistry; McGill University; 801 Sherbrooke St. W. Montreal Quebec H3A 0B8 Canada
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