1
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Liu YY, Zhai YT. Iron-Catalyzed One-Pot Cascade Reactions of Oximes with Inactivated Saturated Ketones: Entry to Highly Substituted Pyridines. J Org Chem 2024; 89:17598-17608. [PMID: 39509683 DOI: 10.1021/acs.joc.4c02361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2024]
Abstract
An iron-catalyzed oxidative [3 + 3] annulation of oxime esters with inactivated saturated ketones is described. This cascade strategy allows one-step rapid synthesis of various structurally important pyridines through an oxidative dehydrogenation/annulation/oxidative aromatization sequence via direct α,β-dehydrogenation of simple saturated ketones followed by annulation with oximes. This method shows good functional group tolerance, readily accessible starting materials, a wide substrate scope, high chemoselectivity, and no need for extra stoichiometric oxidant and is also applicable to the late-stage functionalization of natural products.
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Affiliation(s)
- Yan-Yun Liu
- School of Chemical and Environmental Engineering, Hunan Institute of Technology, Hengyang 421002, China
| | - Yu-Ting Zhai
- School of Chemical and Environmental Engineering, Hunan Institute of Technology, Hengyang 421002, China
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2
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Xia D, Wang W, Xu X, Zhu Y, Li Q, Wang J, Zhang Y, Zhang WD. Access to Diverse Carbonyl Compounds by Catalyst-Free and Photoinduced Aerobic Cleavage of C=N Bonds. Chemistry 2024; 30:e202402607. [PMID: 39215487 DOI: 10.1002/chem.202402607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2024] [Revised: 08/28/2024] [Accepted: 08/29/2024] [Indexed: 09/04/2024]
Abstract
Functional group interconversion is of great significance in organic synthesis. However, aerobic cleavage of C=N bonds to access carbonyl compounds still suffered from some limitations such as harsh reaction conditions, stoichiometric oxidants, poor substrate scope and use of toxic reagents. Herein, we report a catalyst-free and photo-induced aerobic cleavage of C=N bonds to afford diverse carbonyl compounds using oxygen from air as green oxidant. This mild methodology permits N-tosylhydrazones converted into the corresponding carbonyl compounds including ketones, aldehydes and carboxylic acids, showing broad functional group tolerance and compatibility. Moreover, the gram-scale reaction and post-modification of complicated molecules proved the applicability and efficiency of this strategy. Finally, a plausible mechanism was proposed based on spectroscopic investigations and detailed mechanistic studies.
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Affiliation(s)
- Dingding Xia
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, NMPA Key Laboratory for Research and Evaluation of Innovative Drug, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007, China
- Shanghai Frontiers Science Center for Chinese Medicine Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, No. 1200, Cailun Road, Shanghai, 201203, China
| | - Weijie Wang
- Shanghai Frontiers Science Center for Chinese Medicine Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, No. 1200, Cailun Road, Shanghai, 201203, China
| | - Xike Xu
- School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Yanping Zhu
- School of Pharmacy, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai, 264005, China
| | - Qiannan Li
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, NMPA Key Laboratory for Research and Evaluation of Innovative Drug, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007, China
- Shanghai Frontiers Science Center for Chinese Medicine Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, No. 1200, Cailun Road, Shanghai, 201203, China
| | - Jinxin Wang
- School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Yu Zhang
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, NMPA Key Laboratory for Research and Evaluation of Innovative Drug, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007, China
- Shanghai Frontiers Science Center for Chinese Medicine Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, No. 1200, Cailun Road, Shanghai, 201203, China
| | - Wei-Dong Zhang
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, NMPA Key Laboratory for Research and Evaluation of Innovative Drug, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007, China
- Shanghai Frontiers Science Center for Chinese Medicine Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, No. 1200, Cailun Road, Shanghai, 201203, China
- School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
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3
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Kong X, Liang Y, Guo Z, Lin T, Liu S, Liu Z, Liu T, Cheng JP. Determination of pK a Values of C-H Bonds in Polar Fluorinated Arenes Referred to a New CF 3SO 2-Substituted Anchor Compound. CHEMSUSCHEM 2024:e202402041. [PMID: 39567253 DOI: 10.1002/cssc.202402041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2024] [Revised: 11/19/2024] [Accepted: 11/19/2024] [Indexed: 11/22/2024]
Abstract
pKa values of C-H bonds remain unreported and challenging in fluorous solvents because of these solvents' unique physicochemical properties, although they have been measured, theorized and predicted successfully in water and common organic solvents. Herein, a new CF3SO2-substituted anchor compound designed for matching the physicochemical properties of polar fluorinated arenes is synthesized. Its self-dissociation constants in these solvents are used as bases for experimentally determining the pKa values of 36 C-H compounds in them. These experimentally determined pKa values exhibit excellent linear free-energy relationships and correlate well with their corresponding DFT-calculated values. These data indicate that the polar fluorinated arenes are thermodynamically more favorable for deprotonation of ketone derivatives than acetonitrile as reaction media, resulting in enhanced deprotonation-promoted CO2 fixation. The pKa values determined in this work can be used as an important guidance tool for reactions involving the formation and cleavage of C-H bonds in polar fluorinated arenes.
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Affiliation(s)
- Xiangmei Kong
- State Key Laboratory of Elemento-organic Chemistry, College of Chemistry, Nankai University, Weijin Road No. 94, Tianjin, 300071, China
| | - Yunfei Liang
- State Key Laboratory of Elemento-organic Chemistry, College of Chemistry, Nankai University, Weijin Road No. 94, Tianjin, 300071, China
| | - Zhenbo Guo
- State Key Laboratory of Elemento-organic Chemistry, College of Chemistry, Nankai University, Weijin Road No. 94, Tianjin, 300071, China
| | - Tianxing Lin
- State Key Laboratory of Elemento-organic Chemistry, College of Chemistry, Nankai University, Weijin Road No. 94, Tianjin, 300071, China
| | - Shan Liu
- State Key Laboratory of Elemento-organic Chemistry, College of Chemistry, Nankai University, Weijin Road No. 94, Tianjin, 300071, China
| | - Zhiyi Liu
- State Key Laboratory of Elemento-organic Chemistry, College of Chemistry, Nankai University, Weijin Road No. 94, Tianjin, 300071, China
| | - Tianfei Liu
- State Key Laboratory of Elemento-organic Chemistry, College of Chemistry, Nankai University, Weijin Road No. 94, Tianjin, 300071, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, 300192, China
| | - Jin-Pei Cheng
- State Key Laboratory of Elemento-organic Chemistry, College of Chemistry, Nankai University, Weijin Road No. 94, Tianjin, 300071, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, 300192, China
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, 100084, China
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4
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Guo YY, Tian ZH, Zhang L, Han YC, Zhang BB, Xing Q, Shao T, Liu Y, Jiang Z. Photobiocatalytic Platform for the Efficient Enantio-Divergent Synthesis of β-Fluoromethylated Ketones. J Am Chem Soc 2024; 146:31012-31020. [PMID: 39473165 DOI: 10.1021/jacs.4c10441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2024]
Abstract
β-Fluoromethyl (CH2F, CHF2, and CF3)-substituted chiral ketones are essential moieties and are vital building blocks in pharmaceutical and agrochemistry. However, general and convenient methods for enantio-diverse access to diverse β-fluoromethylated ketones are lacking, hindering the further development of these functional moieties. In this study, we developed an ene-reductase-based photobiocatalytic platform for efficient synthesis of enantio-divergent β-fluoromethylated chiral ketones. Our method highlights substrate-type diversity, excellent enantioselectivity, enzymatic enantio-divergent synthesis, as well as a dicyanopyrazine (DPZ)-type photosensitizer for biocompatible olefin E/Z isomerization in enzymatic stereoconvergent olefin asymmetric reduction, thereby providing a general photobiocatalytic solution to diverse β-fluoromethylated chiral ketones.
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Affiliation(s)
- Yuan-Yang Guo
- State Key Laboratory of Antiviral Drugs; Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals; Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; NMPA Key Laboratory for Research and Evaluation of Innovative Drug; Henan Key Laboratory of Organic Functional Molecule and Drug Innovation; School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Ze-Hua Tian
- State Key Laboratory of Antiviral Drugs; Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals; Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; NMPA Key Laboratory for Research and Evaluation of Innovative Drug; Henan Key Laboratory of Organic Functional Molecule and Drug Innovation; School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Linghong Zhang
- State Key Laboratory of Antiviral Drugs; Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals; Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; NMPA Key Laboratory for Research and Evaluation of Innovative Drug; Henan Key Laboratory of Organic Functional Molecule and Drug Innovation; School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Yu-Chen Han
- State Key Laboratory of Antiviral Drugs; Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals; Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; NMPA Key Laboratory for Research and Evaluation of Innovative Drug; Henan Key Laboratory of Organic Functional Molecule and Drug Innovation; School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Bei-Bei Zhang
- State Key Laboratory of Antiviral Drugs; Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals; Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; NMPA Key Laboratory for Research and Evaluation of Innovative Drug; Henan Key Laboratory of Organic Functional Molecule and Drug Innovation; School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Qing Xing
- State Key Laboratory of Antiviral Drugs; Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals; Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; NMPA Key Laboratory for Research and Evaluation of Innovative Drug; Henan Key Laboratory of Organic Functional Molecule and Drug Innovation; School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Tianju Shao
- State Key Laboratory of Antiviral Drugs; Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals; Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; NMPA Key Laboratory for Research and Evaluation of Innovative Drug; Henan Key Laboratory of Organic Functional Molecule and Drug Innovation; School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Yang Liu
- State Key Laboratory of Antiviral Drugs; Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals; Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; NMPA Key Laboratory for Research and Evaluation of Innovative Drug; Henan Key Laboratory of Organic Functional Molecule and Drug Innovation; School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Zhiyong Jiang
- State Key Laboratory of Antiviral Drugs; Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals; Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; NMPA Key Laboratory for Research and Evaluation of Innovative Drug; Henan Key Laboratory of Organic Functional Molecule and Drug Innovation; School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
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5
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He KH, Jin N, Chen JC, Zheng YF, Pan F. Ketone Skeletal Modification via a Metallaphotoredox-Catalyzed Deacylation and Acylation Strategy. Org Lett 2024; 26:9503-9507. [PMID: 39465911 DOI: 10.1021/acs.orglett.4c03456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/29/2024]
Abstract
Herein, we describe a dual catalytic strategy that employs dihydroquinazolinones, derived from ketone analogs, as versatile intermediates for acylation via α C-C cleavage with 2-pyridyl esters, facilitating the efficient synthesis of a variety of ketones. The reaction accommodates a wide range of ketones and carboxylic acids, showing tolerance to various functional groups. The versatility of this synthetic technique is further highlighted through its application in the late-stage modification of pharmaceuticals and biologically active natural products.
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Affiliation(s)
- Ke-Han He
- School of Science, Xichang University, 1 Xuefu Road, Xichang 615000, People's Republic of China
| | - Na Jin
- School of Science, Xichang University, 1 Xuefu Road, Xichang 615000, People's Republic of China
| | - Jia-Cai Chen
- School of Science, Xichang University, 1 Xuefu Road, Xichang 615000, People's Republic of China
| | - You-Fen Zheng
- School of Science, Xichang University, 1 Xuefu Road, Xichang 615000, People's Republic of China
| | - Fei Pan
- College of Chemistry and Materials Science, Sichuan Normal University, 5 Jingan Road, Chengdu 610068, People's Republic of China
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6
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Lu H, Li X, Wang Z, Du P, Yin SF, Kambe N, Qiu R. Base-Promoted One-Pot Four-Component Domino Strategy Involving Aldehydes and Ketones to Access Multifunctionalized Dihydropyridinones. J Org Chem 2024; 89:15574-15582. [PMID: 39417992 DOI: 10.1021/acs.joc.4c01636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2024]
Abstract
The synthesis of multifunctionalized dihydropyridinones from aldehydes and ketones involves at least a three-step process, making route shortening a challenging task, especially in achieving a one-pot four-component synthesis via aldehydes and ketones precondensation. Herein, we discovered a [1 + 2 + 1 + 2] four-component domino cyclization reaction, a novel concept in 4CRs with commercially available ketones and aldehydes, which by initially combining aldehydes and ketones with Meldrum's acid and ammonium acetate (NH4OAc), respectively, they give dihydropyridones (>110 examples). This transformation features inexpensive additives and readily available starting materials, making it appropriate for rapid access to relevant pharmaceutical molecules containing dihydropyridinone-derived heterocycles. Also these compounds can be conveniently converted into trisubstituted and tetrasubstituted pyridines.
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Affiliation(s)
- Hao Lu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
| | - Xinyu Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
| | - Zhiqing Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
| | - Peng Du
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
| | - Shuang-Feng Yin
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
| | - Nobuaki Kambe
- The Institute of Scientific and Industrial Research, Osaka University, 8-1Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Renhua Qiu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
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7
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Okoromoba OE, Chen TA, Jang ES, McMullin CL, Cundari TR, Warren TH. Copper-Catalyzed C(sp 3)-H α-Acetylation: Generation of Quaternary Centers. Angew Chem Int Ed Engl 2024:e202418692. [PMID: 39477874 DOI: 10.1002/anie.202418692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2024] [Indexed: 11/24/2024]
Abstract
α-substituted ketones are important chemical targets as synthetic intermediates as well as functionalities in natural products and pharmaceuticals. We report the α-acetylation of C(sp3)-H substrates R-H with arylmethyl ketones ArC(O)Me to provide α-alkylated ketones ArC(O)CH2R at RT with tBuOOtBu as oxidant via copper(I) β ${\beta }$ -diketiminato catalysts. Proceeding via alkyl radicals R•, this method enables α-substitution with bulky substituents without competing elimination that occurs in more traditional alkylation reactions between enolates and alkyl electrophiles. DFT studies suggest the intermediacy of copper(II) enolates [CuII](CH2C(O)Ar) that capture alkyl radicals R• to give R-CH2C(O)Ar outcompeting dimerization of the copper(II) enolate to give the 1,4-diketone ArC(O)CH2CH2C(O)Ar.
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Affiliation(s)
- Otome E Okoromoba
- Department of Chemistry, Georgetown University, Box 571227, 20057-1227, Washington, DC, USA
| | - Ting-An Chen
- Department of Chemistry, Georgetown University, Box 571227, 20057-1227, Washington, DC, USA
- Department of Chemistry, Michigan State University, 578 S. Shaw Lane, 48824, East Lansing, MI, USA
| | - Eun Sil Jang
- Department of Chemistry, Georgetown University, Box 571227, 20057-1227, Washington, DC, USA
| | | | - Thomas R Cundari
- Department of Chemistry, Center for Advanced Scientific Computing and Modeling (CASCaM), University of North Texas, 76203, Denton, TX, USA
| | - Timothy H Warren
- Department of Chemistry, Georgetown University, Box 571227, 20057-1227, Washington, DC, USA
- Department of Chemistry, Michigan State University, 578 S. Shaw Lane, 48824, East Lansing, MI, USA
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8
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Yang B, Tang RY. Direct synthesis of dialkyl ketones from deoxygenative cross-coupling of carboxylic acids and alcohols. Chem Sci 2024:d4sc05420b. [PMID: 39421204 PMCID: PMC11480827 DOI: 10.1039/d4sc05420b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2024] [Accepted: 10/07/2024] [Indexed: 10/19/2024] Open
Abstract
Carboxylic acids and alcohols are widely commercially available, structurally diverse, benchtop stable, and ubiquitous in both natural products and pharmaceutical agents, making them ideal coupling partners for organic synthesis. Though various transformations have been developed by enabling the activation and subsequent cross-coupling of carboxylic acids and alcohols in separate contexts, the direct coupling of these two structural motifs to build value-added molecules is rare. Herein, we developed a direct deoxygenative cross-coupling between carboxylic acids and alcohols for dialkyl ketone synthesis via photoredox/nickel dual catalysis. This protocol provides a powerful platform to construct a wide range of structurally diverse ketone scaffolds with broad substrate scope, good functional group tolerance, step-economy and mild reaction conditions, using simple and readily available substrates. Moreover, the large-scale synthesis and late-stage functionalization of biological molecules also demonstrate the potential practicality.
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Affiliation(s)
- Bo Yang
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University Guangzhou 510642 P. R. China
- State Key Laboratory of Green Pesticide, South China Agricultural University Guangzhou 510642 P. R. China
| | - Ri-Yuan Tang
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University Guangzhou 510642 P. R. China
- State Key Laboratory of Green Pesticide, South China Agricultural University Guangzhou 510642 P. R. China
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9
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Manna S, Sreedhara RH, Prabhu KR. Visible light-mediated radical addition cascade cyclization of aryl isocyanides with tricarbonyls: rapid access to substituted phenanthridines and isoquinolines. Org Biomol Chem 2024; 22:7786-7790. [PMID: 39235450 DOI: 10.1039/d4ob01405g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2024]
Abstract
A visible light-mediated synthesis of substituted phenanthridines and isoquinolines from ortho-substituted aryl isocyanides and tricarbonyl compounds is unveiled via the radical addition cascade cyclization (RACC) strategy. This acid/base-free method involves an oxidant (a persulphate salt) and a Ru-photocatalyst. This protocol avoids the use of halogenated compounds as pre-functionalized carbonyl precursors. The products can be easily post-modified to other important small molecules. The functional group tolerance of the reaction and the yields of the products are good without any scalability issues. The mechanistic investigation suggested the presence of a radical pathway during the reaction.
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Affiliation(s)
- Sabyasachi Manna
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India.
| | - Rahul Halanuru Sreedhara
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India.
| | - Kandikere Ramaiah Prabhu
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India.
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10
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Li QZ, He MH, Zeng R, Lei YY, Yu ZY, Jiang M, Zhang X, Li JL. Molecular Editing of Ketones through N-Heterocyclic Carbene and Photo Dual Catalysis. J Am Chem Soc 2024; 146:22829-22839. [PMID: 39086019 DOI: 10.1021/jacs.4c08163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2024]
Abstract
The molecular editing of ketones represents an appealing strategy due to its ability to maximize the structural diversity of ketone compounds in a straightforward manner. However, developing efficient methods for the arbitrary modification of ketonic molecules, particularly those integrated within complex skeletons, remains a significant challenge. Herein, we present a unique strategy for ketone recasting that involves radical acylation of pre-functionalized ketones facilitated by N-heterocyclic carbene and photo dual catalysis. This protocol features excellent substrate tolerance and can be applied to the convergent synthesis and late-stage functionalization of structurally complex bioactive ketones. Mechanistic investigations, including experimental studies and density functional theory (DFT) calculations, shed light on the reaction mechanism and elucidate the basis of the regioselectivity.
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Affiliation(s)
- Qing-Zhu Li
- Anti-infective Agent Creation Engineering Research Centre of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Mei-Hao He
- Anti-infective Agent Creation Engineering Research Centre of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Rong Zeng
- Anti-infective Agent Creation Engineering Research Centre of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Yuan-Yuan Lei
- Anti-infective Agent Creation Engineering Research Centre of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Zhao-Yuan Yu
- Anti-infective Agent Creation Engineering Research Centre of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Min Jiang
- Anti-infective Agent Creation Engineering Research Centre of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Xiang Zhang
- Anti-infective Agent Creation Engineering Research Centre of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Jun-Long Li
- Anti-infective Agent Creation Engineering Research Centre of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, China
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11
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Lei SH, Zou YF, Qu JP, Kang YB. TBN as Organic Redox Cocatalyst for Oxidative Tiffeneau-Demjanov-Type Rearrangement Using O 2 as Sole Oxidant. Org Lett 2024; 26:6454-6458. [PMID: 39037151 DOI: 10.1021/acs.orglett.4c02264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/23/2024]
Abstract
The Tiffeneau-Demjanov-type rearrangement is a ring-expansion reaction involving the cationic rearrangement of cyclic alcohols. The carbocation intermediates can be generated in situ via various means, including Wacker oxidation. In near recent reports on the reinvestiagtions by Wahl et al. (Sietmann, J.; Tenberge, M.; Wahl, J. M. Wacker Oxidation of Methylenecyclobutanes: Scope and Selectivity in an Unusual Setting. Angew. Chem., Int. Ed. 2023, 62, e202215381) and Zhu et al. (Feng, Q.; Wang, Q.; Zhu, J.-P. Oxidative Rearrangement of 1,1-Disubstituted Alkenes to Ketones. Science 2023, 379, 1363-1368), stoichiometric oxidants were involved. In this work, we report the Tiffeneau-Demjanov-type rearrangement can be smoothly promoted by the Pd-TBN cocatalyzed aerobic Wacker oxidation using molecular oxygen as the sole oxidant. tert-Butanol is essential for achieving high yields. Since the first report by Grigg et al. in 1977 (Boontanonda, P.; Grigg, R. J. Palladium (II)-Catalysed Ring Expansion of Methylenecyclobutanes and Related Systems. J. Chem. Soc. Chem. Commun. 1977, 17, 583-584), the five-decade journey of Pd-catalyzed Tiffeneau-Demjanov-type rearrangement returns to the aerobic again.
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Affiliation(s)
- Shu-Hui Lei
- Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Yu-Fan Zou
- Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jian-Ping Qu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Yan-Biao Kang
- Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
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12
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Wang L, Yilmaz F, Yildirim O, Schölermann B, Bag S, Greiner L, Pahl A, Sievers S, Scheel R, Strohmann C, Squire C, Foley DJ, Ziegler S, Grigalunas M, Waldmann H. Discovery of a Novel Pseudo-Natural Product Aurora Kinase Inhibitor Chemotype through Morphological Profiling. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2309202. [PMID: 38569218 PMCID: PMC11151026 DOI: 10.1002/advs.202309202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 02/20/2024] [Indexed: 04/05/2024]
Abstract
The pseudo-natural product (pseudo-NP) concept aims to combine NP fragments in arrangements that are not accessible through known biosynthetic pathways. The resulting compounds retain the biological relevance of NPs but are not yet linked to bioactivities and may therefore be best evaluated by unbiased screening methods resulting in the identification of unexpected or unprecedented bioactivities. Herein, various NP fragments are combined with a tricyclic core connectivity via interrupted Fischer indole and indole dearomatization reactions to provide a collection of highly three-dimensional pseudo-NPs. Target hypothesis generation by morphological profiling via the cell painting assay guides the identification of an unprecedented chemotype for Aurora kinase inhibition with both its relatively highly 3D structure and its physicochemical properties being very different from known inhibitors. Biochemical and cell biological characterization indicate that the phenotype identified by the cell painting assay corresponds to the inhibition of Aurora kinase B.
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Affiliation(s)
- Lin Wang
- Department of Chemical BiologyMax Planck Institute of Molecular Physiology44227DortmundGermany
| | - Furkan Yilmaz
- Department of Chemical BiologyMax Planck Institute of Molecular Physiology44227DortmundGermany
- Faculty of Chemistry and Chemical BiologyTU Dortmund University44227DortmundGermany
| | - Okan Yildirim
- Department of Chemical BiologyMax Planck Institute of Molecular Physiology44227DortmundGermany
| | - Beate Schölermann
- Department of Chemical BiologyMax Planck Institute of Molecular Physiology44227DortmundGermany
| | - Sukdev Bag
- Department of Chemical BiologyMax Planck Institute of Molecular Physiology44227DortmundGermany
| | - Luca Greiner
- Department of Chemical BiologyMax Planck Institute of Molecular Physiology44227DortmundGermany
| | - Axel Pahl
- Department of Chemical BiologyMax Planck Institute of Molecular Physiology44227DortmundGermany
- Compound Management and Screening Center (COMAS)44227DortmundGermany
| | - Sonja Sievers
- Department of Chemical BiologyMax Planck Institute of Molecular Physiology44227DortmundGermany
- Compound Management and Screening Center (COMAS)44227DortmundGermany
| | - Rebecca Scheel
- Faculty of Chemistry and Inorganic ChemistryTU Dortmund University44227DortmundGermany
| | - Carsten Strohmann
- Faculty of Chemistry and Inorganic ChemistryTU Dortmund University44227DortmundGermany
| | - Christopher Squire
- School of Biological SciencesUniversity of Auckland1142AucklandNew Zealand
| | - Daniel J. Foley
- School of Physical and Chemical SciencesUniversity of Canterbury8041ChristchurchNew Zealand
| | - Slava Ziegler
- Department of Chemical BiologyMax Planck Institute of Molecular Physiology44227DortmundGermany
| | - Michael Grigalunas
- Department of Chemical BiologyMax Planck Institute of Molecular Physiology44227DortmundGermany
| | - Herbert Waldmann
- Department of Chemical BiologyMax Planck Institute of Molecular Physiology44227DortmundGermany
- Faculty of Chemistry and Chemical BiologyTU Dortmund University44227DortmundGermany
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13
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Bera S, Kabadwal LM, Banerjee D. Harnessing alcohols as sustainable reagents for late-stage functionalisation: synthesis of drugs and bio-inspired compounds. Chem Soc Rev 2024; 53:4607-4647. [PMID: 38525675 DOI: 10.1039/d3cs00942d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
Alcohol is ubiquitous with unparalleled structural diversity and thus has wide applications as a native functional group in organic synthesis. It is highly prevalent among biomolecules and offers promising opportunities for the development of chemical libraries. Over the last decade, alcohol has been extensively used as an environmentally friendly chemical for numerous organic transformations. In this review, we collectively discuss the utilisation of alcohol from 2015 to 2023 in various organic transformations and their application toward intermediates of drugs, drug derivatives and natural product-like molecules. Notable features discussed are as follows: (i) sustainable approaches for C-X alkylation (X = C, N, or O) including O-phosphorylation of alcohols, (ii) newer strategies using methanol as a methylating reagent, (iii) allylation of alkenes and alkynes including allylic trifluoromethylations, (iv) alkenylation of N-heterocycles, ketones, sulfones, and ylides towards the synthesis of drug-like molecules, (v) cyclisation and annulation to pharmaceutically active molecules, and (vi) coupling of alcohols with aryl halides or triflates, aryl cyanide and olefins to access drug-like molecules. We summarise the synthesis of over 100 drugs via several approaches, where alcohol was used as one of the potential coupling partners. Additionally, a library of molecules consisting over 60 fatty acids or steroid motifs is documented for late-stage functionalisation including the challenges and opportunities for harnessing alcohols as renewable resources.
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Affiliation(s)
- Sourajit Bera
- Department of Chemistry, Laboratory of Catalysis and Organic Synthesis, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
| | - Lalit Mohan Kabadwal
- Department of Chemistry, Laboratory of Catalysis and Organic Synthesis, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
| | - Debasis Banerjee
- Department of Chemistry, Laboratory of Catalysis and Organic Synthesis, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
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14
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Porte V, Milunovic MNM, Knof U, Leischner T, Danzl T, Kaiser D, Gruene T, Zalibera M, Jelemenska I, Bucinsky L, Jannuzzi SAV, DeBeer S, Novitchi G, Maulide N, Arion VB. Chemical and Redox Noninnocence of Pentane-2,4-dione Bis( S-methylisothiosemicarbazone) in Cobalt Complexes and Their Application in Wacker-Type Oxidation. JACS AU 2024; 4:1166-1183. [PMID: 38559722 PMCID: PMC10976605 DOI: 10.1021/jacsau.4c00005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 02/09/2024] [Accepted: 02/15/2024] [Indexed: 04/04/2024]
Abstract
Cobalt complexes with multiproton- and multielectron-responsive ligands are of interest for challenging catalytic transformations. The chemical and redox noninnocence of pentane-2,4-dione bis(S-methylisothiosemicarbazone) (PBIT) in a series of cobalt complexes has been studied by a range of methods, including spectroscopy [UV-vis, NMR, electron paramagnetic resonance (EPR), X-ray absorption spectroscopy (XAS)], cyclic voltammetry, X-ray diffraction, and density functional theory (DFT) calculations. Two complexes [CoIII(H2LSMe)I]I and [CoIII(LSMe)I2] were found to act as precatalysts in a Wacker-type oxidation of olefins using phenylsilane, the role of which was elucidated through isotopic labeling. Insights into the mechanism of the catalytic transformation as well as the substrate scope of this selective reaction are described, and the essential role of phenylsilane and the noninnocence of PBIT are disclosed. Among the several relevant species characterized was an unprecedented Co(III) complex with a dianionic diradical PBIT ligand ([CoIII(LSMe••)I]).
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Affiliation(s)
- Vincent Porte
- University
of Vienna, Institute of Organic Chemistry, Währinger Strasse 38, A-1090 Vienna, Austria
| | - Miljan N. M. Milunovic
- University
of Vienna, Institute of Inorganic Chemistry, Währinger Strasse 42, A-1090 Vienna, Austria
| | - Ulrich Knof
- Novartis
Pharma AG, CH-4056 Basel, Switzerland
| | - Thomas Leischner
- University
of Vienna, Institute of Organic Chemistry, Währinger Strasse 38, A-1090 Vienna, Austria
| | - Tobias Danzl
- University
of Vienna, Institute of Organic Chemistry, Währinger Strasse 38, A-1090 Vienna, Austria
| | - Daniel Kaiser
- University
of Vienna, Institute of Organic Chemistry, Währinger Strasse 38, A-1090 Vienna, Austria
| | - Tim Gruene
- University
of Vienna, Institute of Inorganic Chemistry, Währinger Strasse 42, A-1090 Vienna, Austria
| | - Michal Zalibera
- Institute
of Physical Chemistry and Chemical Physics, Faculty of Chemical and
Food Technology, Slovak University of Technology
in Bratislava, Radlinského 9, SK-81237 Bratislava, Slovak Republic
| | - Ingrid Jelemenska
- Institute
of Physical Chemistry and Chemical Physics, Faculty of Chemical and
Food Technology, Slovak University of Technology
in Bratislava, Radlinského 9, SK-81237 Bratislava, Slovak Republic
| | - Lukas Bucinsky
- Institute
of Physical Chemistry and Chemical Physics, Faculty of Chemical and
Food Technology, Slovak University of Technology
in Bratislava, Radlinského 9, SK-81237 Bratislava, Slovak Republic
| | - Sergio A. V. Jannuzzi
- Max
Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Serena DeBeer
- Max
Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470 Mülheim an der Ruhr, Germany
| | | | - Nuno Maulide
- University
of Vienna, Institute of Organic Chemistry, Währinger Strasse 38, A-1090 Vienna, Austria
| | - Vladimir B. Arion
- University
of Vienna, Institute of Inorganic Chemistry, Währinger Strasse 42, A-1090 Vienna, Austria
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15
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Tsai ZN, Li LY, Paculba AS, Miñoza S, Tsao YT, Lin PS, Liao HH. Pro-aromatic Dihydroquinazolinones - From Multigram Synthesis to Reagents for Gram-scale Metallaphotoredox Reactions. Chem Asian J 2023:e202301004. [PMID: 38102804 DOI: 10.1002/asia.202301004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 12/14/2023] [Accepted: 12/15/2023] [Indexed: 12/17/2023]
Abstract
Dihydroquinazolinone (DHQZ) has recently been harnessed as a ketone-derived pro-aromatic reagent extensively employed in (metalla)photoredox reactions as versatile group transfer agents. In this work, we outline a column chromatography-free protocol for the multigram-scale synthesis of pro-aromatic DHQZs as well as its use in a gram-scale nickel/photoredox dual-catalyzed cross-coupling in single-batch, photoflow, and simultaneous multiple smaller batches. While the single-batch approach leveraged moderate yields, a simple plug-flow photoreactor also exhibited amenable productivity (up to 45 % yield) despite the use of a heterogeneous base. Meanwhile, performing the metallaphotoredox-catalyzed reaction in multiple smaller batches in an improvised photoreactor facilitated high yields of up to 59 % and good reproducibility, implying a convenient alternative in the absence of photoflow setups.
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Affiliation(s)
- Zong-Nan Tsai
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, Taiwan (ROC
| | - Li-Yun Li
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, Taiwan (ROC
| | - Aira Shayne Paculba
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, Taiwan (ROC
| | - Shinje Miñoza
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, Taiwan (ROC
| | - Yong-Ting Tsao
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, Taiwan (ROC
| | - Pei-Shan Lin
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, Taiwan (ROC
| | - Hsuan-Hung Liao
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, Taiwan (ROC
- Department of Applied and Medicinal Chemistry, Kaohsiung Medical University, Kaohsiung, Taiwan (ROC
- Green Hydrogen Research Center, National Sun Yat-sen University, Kaohsiung, Taiwan (ROC
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16
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Kumar N, Sankar RV, Gunanathan C. Ruthenium-Catalyzed Self-Coupling of Secondary Alcohols. J Org Chem 2023. [PMID: 38039390 DOI: 10.1021/acs.joc.3c02029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2023]
Abstract
A simple catalytic method for self-coupling of secondary alcohols leading to the synthesis of β-branched ketones under mild conditions is reported. Well-defined ruthenium pincer complex catalyzed the reactions. Optimization studies revealed that sodium tert-butoxide is an appropriate base for this transformation. Functionalized aryl methanols, heteroaryl methanols, and linear and branched aliphatic secondary alcohols underwent facile catalytic self-coupling reactions. Mechanistic studies revealed that both catalyst and base are crucial to achieve dehydrogenation of secondary alcohols to ketones, their subsequent controlled aldol condensation, and further hydrogenation of α,β-unsaturated intermediates, leading to the selective formation of β-branched ketone products. Notably, the noninnocent PNP ligand which displays amine-amide metal-ligand cooperation operative in a catalyst played a key role in facilitating this catalytic self-coupling of secondary alcohols. Liberated molecular hydrogen and water are the only byproducts.
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Affiliation(s)
- Nitin Kumar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar 752050, India
| | - Raman Vijaya Sankar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar 752050, India
| | - Chidambaram Gunanathan
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar 752050, India
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17
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Xie J, Pahl A, Krzyzanowski A, Krupp A, Liu J, Koska S, Schölermann B, Zhang R, Bonowski J, Sievers S, Strohmann C, Ziegler S, Grigalunas M, Waldmann H. Synthetic Matching of Complex Monoterpene Indole Alkaloid Chemical Space. Angew Chem Int Ed Engl 2023; 62:e202310222. [PMID: 37818743 DOI: 10.1002/anie.202310222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 10/02/2023] [Accepted: 10/06/2023] [Indexed: 10/13/2023]
Abstract
Monoterpene indole alkaloids (MIAs) are endowed with high structural and spatial complexity and characterized by diverse biological activities. Given this complexity-activity combination in MIAs, rapid and efficient access to chemical matter related to and with complexity similar to these alkaloids would be highly desirable, since such compound classes might display novel bioactivity. We describe the design and synthesis of a pseudo-natural product (pseudo-NP) collection obtained by the unprecedented combination of MIA fragments through complexity-generating transformations, resulting in arrangements not currently accessible by biosynthetic pathways. Cheminformatic analyses revealed that both the pseudo-NPs and the MIAs reside in a unique and common area of chemical space with high spatial complexity-density that is only sparsely populated by other natural products and drugs. Investigation of bioactivity guided by morphological profiling identified pseudo-NPs that inhibit DNA synthesis and modulate tubulin. These results demonstrate that the pseudo-NP collection occupies similar biologically relevant chemical space that Nature has endowed MIAs with.
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Affiliation(s)
- Jianing Xie
- Department of Chemical Biology, Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Straße 11, 44227, Dortmund, Germany
| | - Axel Pahl
- Department of Chemical Biology, Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Straße 11, 44227, Dortmund, Germany
- Compound Management and Screening Center (COMAS), Otto-Hahn-Straße 11, 44227, Dortmund, Germany
| | - Adrian Krzyzanowski
- Department of Chemical Biology, Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Straße 11, 44227, Dortmund, Germany
- Faculty of Chemistry and Chemical Biology, TU Dortmund University, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
| | - Anna Krupp
- Faculty of Chemistry, Inorganic Chemistry, TU Dortmund University, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
| | - Jie Liu
- Department of Chemical Biology, Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Straße 11, 44227, Dortmund, Germany
| | - Sandra Koska
- Department of Chemical Biology, Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Straße 11, 44227, Dortmund, Germany
| | - Beate Schölermann
- Department of Chemical Biology, Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Straße 11, 44227, Dortmund, Germany
| | - Ruirui Zhang
- Department of Chemical Biology, Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Straße 11, 44227, Dortmund, Germany
| | - Jana Bonowski
- Department of Chemical Biology, Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Straße 11, 44227, Dortmund, Germany
| | - Sonja Sievers
- Department of Chemical Biology, Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Straße 11, 44227, Dortmund, Germany
- Compound Management and Screening Center (COMAS), Otto-Hahn-Straße 11, 44227, Dortmund, Germany
| | - Carsten Strohmann
- Faculty of Chemistry, Inorganic Chemistry, TU Dortmund University, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
| | - Slava Ziegler
- Department of Chemical Biology, Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Straße 11, 44227, Dortmund, Germany
| | - Michael Grigalunas
- Department of Chemical Biology, Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Straße 11, 44227, Dortmund, Germany
| | - Herbert Waldmann
- Department of Chemical Biology, Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Straße 11, 44227, Dortmund, Germany
- Faculty of Chemistry and Chemical Biology, TU Dortmund University, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
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18
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Mondal B, Chen H, Maiti R, Wang H, Cai H, Mou C, Hao L, Chai H, Chi YR. Carbene-Catalyzed Direct O-Functionalization of Ketone: Atroposelective Access to Non- C2-Symmetric Binaphthyls. Org Lett 2023; 25:8252-8257. [PMID: 37955414 DOI: 10.1021/acs.orglett.3c03141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
Disclosed here is NHC-catalyzed direct intermolecular trapping of the ketone oxygen atom with the acyl azolium intermediate. The overall reaction is a dynamic kinetic resolution process that converts ketone to the corresponding enol ester with well-controlled axial chirality. Our reaction eventually affords non-C2-symmetric binaphthyl derivatives with important applications, such as in the area of asymmetric catalysis.
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Affiliation(s)
- Bivas Mondal
- School of Chemistry, Chemical Engineering, and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Hang Chen
- School of Chemistry, Chemical Engineering, and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Rakesh Maiti
- School of Chemistry, Chemical Engineering, and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Hongling Wang
- School of Chemistry, Chemical Engineering, and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Hui Cai
- National Key Laboratory of Green Pesticide, Guizhou University, Guiyang, Guizhou 550025, People's Republic of China
| | - Chengli Mou
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550025, People's Republic of China
| | - Lin Hao
- School of Chemistry, Chemical Engineering, and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Huifang Chai
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550025, People's Republic of China
| | - Yonggui Robin Chi
- National Key Laboratory of Green Pesticide, Guizhou University, Guiyang, Guizhou 550025, People's Republic of China
- School of Chemistry, Chemical Engineering, and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
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19
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Eaton M, Dai Y, Wang Z, Li B, Lamine W, Miqueu K, Liu SY. Synthesis of Allenes by Hydroalkylation of 1,3-Enynes with Ketones Enabled by Cooperative Catalysis. J Am Chem Soc 2023; 145:21638-21645. [PMID: 37738372 PMCID: PMC10783955 DOI: 10.1021/jacs.3c08151] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/24/2023]
Abstract
A method for the synthesis of allenes by the addition of ketones to 1,3-enynes by cooperative Pd(0)Senphos/B(C6F5)3/NR3 catalysis is described. A wide range of aryl- and aliphatic ketones undergo addition to various 1,3-enynes in high yields at room temperature. Mechanistic investigations revealed a rate-determining outer-sphere proton transfer mechanism, which was corroborated by DFT calculations.
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Affiliation(s)
- Maxwell Eaton
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467-3860, United States
| | - Yuping Dai
- E2S UPPA/CNRS, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux IPREM UMR 5254, Université de Pau et des Pays de l'Adour, Hélioparc, 2 avenue P. Angot, 64053 Pau Cedex 09, France
| | - Ziyong Wang
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467-3860, United States
| | - Bo Li
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467-3860, United States
| | - Walid Lamine
- E2S UPPA/CNRS, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux IPREM UMR 5254, Université de Pau et des Pays de l'Adour, Hélioparc, 2 avenue P. Angot, 64053 Pau Cedex 09, France
| | - Karinne Miqueu
- E2S UPPA/CNRS, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux IPREM UMR 5254, Université de Pau et des Pays de l'Adour, Hélioparc, 2 avenue P. Angot, 64053 Pau Cedex 09, France
| | - Shih-Yuan Liu
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467-3860, United States
- E2S UPPA/CNRS, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux IPREM UMR 5254, Université de Pau et des Pays de l'Adour, Hélioparc, 2 avenue P. Angot, 64053 Pau Cedex 09, France
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20
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Li QZ, Zeng R, Xu PS, Jin XH, Xie C, Yang QC, Zhang X, Li JL. Direct Acylation of Unactivated Alkyl Halides with Aldehydes through N-Heterocyclic Carbene Organocatalysis. Angew Chem Int Ed Engl 2023; 62:e202309572. [PMID: 37581950 DOI: 10.1002/anie.202309572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 08/15/2023] [Accepted: 08/15/2023] [Indexed: 08/17/2023]
Abstract
Catalytic acylation of organohalides with aldehydes is an ideal strategy for the direct synthesis of ketones. However, the utilization of unactivated alkyl halides in such a transformation remains a formidable challenge. In this study, we developed a cross-coupling reaction of aldehydes with unactivated alkyl halides through N-heterocyclic carbene catalysis. With this protocol, various ketones could be rapidly synthesized from readily available starting materials under mild conditions. This organocatalytic system was successfully applied in the late-stage functionalization of pharmaceutical derivatives. Mechanistic investigations suggest a closed-shell nucleophilic substitution mechanism for this reaction.
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Affiliation(s)
- Qing-Zhu Li
- Anti-infective Agent Creation Engineering Research Centre of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, 610106, China
| | - Rong Zeng
- Anti-infective Agent Creation Engineering Research Centre of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, 610106, China
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Peng-Shuai Xu
- Anti-infective Agent Creation Engineering Research Centre of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, 610106, China
| | - Xin-Hang Jin
- Anti-infective Agent Creation Engineering Research Centre of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, 610106, China
| | - Chuan Xie
- Anti-infective Agent Creation Engineering Research Centre of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, 610106, China
| | - Qi-Chun Yang
- Anti-infective Agent Creation Engineering Research Centre of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, 610106, China
| | - Xiang Zhang
- Anti-infective Agent Creation Engineering Research Centre of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, 610106, China
| | - Jun-Long Li
- Anti-infective Agent Creation Engineering Research Centre of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, 610106, China
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21
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Yan ZM, Qi L, Du HJ, Zhao ZQ, Liu JL, Dong YC, Li W, Wang LJ. Photocatalytic C-C Bond Cleavage and Fluorosulfonylation of Strained Cycloalkanols for Carbonyl-Containing Aliphatic Sulfonyl Fluorides. Org Lett 2023; 25:7051-7056. [PMID: 37728878 DOI: 10.1021/acs.orglett.3c02727] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
In this report, we present a photocatalytic ring-opening fluorosulfonylation of strained cycloalkanols with sulfur dioxide and NFSI under mild conditions for the synthesis of carbonyl-containing aliphatic sulfonyl fluorides. The synthetic potential of the carbonyl-containing aliphatic sulfonyl fluoride products has been examined by diverse transformations, including SuFEx reactions and Baeyer-Villiger oxidation reactions. Mechanistic studies demonstrate that the reaction operates through a radical C-C bond cleavage/SO2 insertion/fluorination cascade process.
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Affiliation(s)
- Zhi-Min Yan
- College of Chemistry and Materials Science, Key Laboratory of Medicinal Chemistry, and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, 180 Wusi Donglu, Baoding 071002, P. R. China
| | - Lin Qi
- College of Chemistry and Materials Science, Key Laboratory of Medicinal Chemistry, and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, 180 Wusi Donglu, Baoding 071002, P. R. China
| | - Hui-Jie Du
- College of Chemistry and Materials Science, Key Laboratory of Medicinal Chemistry, and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, 180 Wusi Donglu, Baoding 071002, P. R. China
| | - Zi-Qiang Zhao
- College of Chemistry and Materials Science, Key Laboratory of Medicinal Chemistry, and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, 180 Wusi Donglu, Baoding 071002, P. R. China
| | - Jia-Li Liu
- College of Chemistry and Materials Science, Key Laboratory of Medicinal Chemistry, and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, 180 Wusi Donglu, Baoding 071002, P. R. China
| | - Yi-Chen Dong
- College of Chemistry and Materials Science, Key Laboratory of Medicinal Chemistry, and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, 180 Wusi Donglu, Baoding 071002, P. R. China
| | - Wei Li
- College of Chemistry and Materials Science, Key Laboratory of Medicinal Chemistry, and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, 180 Wusi Donglu, Baoding 071002, P. R. China
| | - Li-Jing Wang
- College of Chemistry and Materials Science, Key Laboratory of Medicinal Chemistry, and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, 180 Wusi Donglu, Baoding 071002, P. R. China
- State Key Laboratory of New Pharmaceutical Preparations and Excipients, Hebei University, 180 Wusi Donglu, Baoding 071002, P. R. China
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22
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Bag S, Ojha S, Venugopalan S, Sahoo B. Photocatalytic Alkylation/Arylative Cyclization of N-Acrylamides of N-Heteroarenes and Arylamines with Dihydroquinazolinones from Unactivated Ketones. J Org Chem 2023; 88:12121-12130. [PMID: 37515554 DOI: 10.1021/acs.joc.3c01149] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/31/2023]
Abstract
We describe a visible-light photoredox-catalyzed alkylation/arylative cyclization of N-acrylamides─from 2-arylindoles, 2-arylbenzimidazoles, or N-substituted anilines─with ketone-derived dihydroquinazolinones, accessing indolo- and benzimidazolo[2,1-a]isoquinolines or 2-oxindoles. The consecutive incorporation of alkyl- and aryl-carbogenic motifs across a C=C bond via formal cleavage of ketone α-C-C and arene C-H bonds leads to the formation of five- and six-membered rings, with an all-carbon quaternary stereocenter. This dicarbofunctionalization elaborates aromatization-driven radical C-C functionalization of unactivated aliphatic ketones to construct diverse cyclic structures with functionality tolerance.
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Affiliation(s)
- Sandip Bag
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram - 695551, Kerala, India
| | - Shubham Ojha
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram - 695551, Kerala, India
| | - Sreelakshmi Venugopalan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram - 695551, Kerala, India
| | - Basudev Sahoo
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram - 695551, Kerala, India
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23
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Liang H, Huang Q, Zou L, Wei P, Lu J, Zhang Y. Methyl gallate: Review of pharmacological activity. Pharmacol Res 2023; 194:106849. [PMID: 37429335 DOI: 10.1016/j.phrs.2023.106849] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 07/07/2023] [Indexed: 07/12/2023]
Abstract
Methyl gallate (MG) is a polyphenolic compound widely found in natural plants. MG has been shown to have a variety of biological functions, including anti-tumor, anti-inflammatory, anti-oxidant, neuroprotective, hepatoprotective and anti-microbial activities, and has broad research and development prospects. A total of 88 articles related to MG were searched using the PubMed, Science Direct, and Google Scholar databases, systematically investigating the pharmacological activity and molecular mechanisms of MG. There were no restrictions on the publication years, and the last search was conducted on June 5, 2023. MG can exert pharmacological effects through multiple pathways and targets, such as PI3K/Akt, ERK1/2, Caspase, AMPK/NF-κB, Wnt/β-catenin, TLR4/NF-κB, MAPK, p53, NLRP3, ROS, EMT. According to the literature, MG has the potential to be a prospective adjuvant for anticancer therapy and deserves further study.
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Affiliation(s)
- Huaguo Liang
- School of Basic Medical Sciences, Guangdong Pharmaceutical University, Guangzhou 510006, PR China
| | - Qingsong Huang
- School of Basic Medical Sciences, Guangdong Pharmaceutical University, Guangzhou 510006, PR China
| | - Li Zou
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, PR China
| | - Peng Wei
- School of Basic Medical Sciences, Guangdong Pharmaceutical University, Guangzhou 510006, PR China
| | - Jiazheng Lu
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, PR China
| | - Yongli Zhang
- School of Basic Medical Sciences, Guangdong Pharmaceutical University, Guangzhou 510006, PR China.
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24
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Ni J, Xia X, Gu D, Wang Z. Ti-Catalyzed Modular Ketone Synthesis from Carboxylic Derivatives and gem-Dihaloalkanes. J Am Chem Soc 2023. [PMID: 37365677 DOI: 10.1021/jacs.3c04009] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
Ketones are ubiquitous in organic synthesis. However, the general method to convert widely available carboxylic acids, unactivated esters, and amides into ketones remains elusive. Herein, we describe the Ti-catalyzed modular ketone synthesis from carboxylic derivatives and easily accessed gem-dihaloalkanes. Notably, this protocol could achieve the direct catalytic olefination of carboxylic acids. This method features a sequence of olefination and electrophilic transformation and good functional group compatibility and allows rapid access to various functionalized ketones. Preliminary mechanistic studies provide insights into the reaction pathway and support the intermediacy of plausible alkylidene titanocene and gem-bimetallic complexes.
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Affiliation(s)
- Jiabin Ni
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, Hangzhou 310024, Zhejiang Province, China; Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, Zhejiang Province, China
| | - Xiaowen Xia
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, Hangzhou 310024, Zhejiang Province, China; Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, Zhejiang Province, China
| | - Danyu Gu
- Instrumentation and Service Center for Molecular Sciences, Westlake University, Hangzhou 310024, Zhejiang Province, China
| | - Zhaobin Wang
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, Hangzhou 310024, Zhejiang Province, China; Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, Zhejiang Province, China
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25
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Chen XW, Hou ZC, Chen C, Zhang LH, Chen ME, Zhang FM. Enantioselective total syntheses of six natural and two proposed meroterpenoids from Psoralea corylifolia. Chem Sci 2023; 14:5699-5704. [PMID: 37265714 PMCID: PMC10231314 DOI: 10.1039/d3sc00582h] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 05/01/2023] [Indexed: 06/03/2023] Open
Abstract
The first enantioselective total syntheses of six natural and two proposed meroterpenoids isolated from Psoralea corylifolia have been achieved in 7-9 steps from 2-methylcyclohexanone. The current synthetic approaches feature a high level of synthetic flexibility, stereodivergent fashion and short synthetic route, thereby providing a potential platform for the preparation of numerous this-type meroterpenoids and their pseudo-natural products.
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Affiliation(s)
- Xiao-Wei Chen
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Lanzhou 730000 China
| | - Zi-Chao Hou
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Lanzhou 730000 China
| | - Chi Chen
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Lanzhou 730000 China
| | - Ling-Hui Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Lanzhou 730000 China
| | - Meng-En Chen
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Lanzhou 730000 China
| | - Fu-Min Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Lanzhou 730000 China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University Shanghai 200062 China
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26
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Mondal PP, Das S, Venugopalan S, Krishnan M, Sahoo B. Visible-Light-Photocatalyzed Dicarbofunctionalization of Conjugated Alkenes with Ketone-Based Dihydroquinazolinones. Org Lett 2023; 25:1441-1446. [PMID: 36820645 DOI: 10.1021/acs.orglett.3c00175] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
A visible-light-photocatalyzed 1,2-arylalkylation of N-(arylsulfonyl)acrylamides with ketone-based dihydroquinazolinones is described. The formal C-C bond cleavage of aliphatic ketones is unified with tandem radical alkylation/1,4-aryl migration/desulfonylation to forge two different types of vicinal C-C bonds and construct an all-carbon quaternary α-stereocenter, thus enhancing the carbogenic complexity and tolerating diverse functionalities. Additional to telescopic synthesis and product diversification, this method features a radical dicarbofunctionalization of conjugated N-(arylsulfonyl)acrylamides with a nucleophilic alkyl radical precursor (dihydroquinazolinone) utilizing oxygen as a green oxidant at ambient temperature.
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Affiliation(s)
- Pinku Prasad Mondal
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram, 695551 Kerala, India
| | - Subham Das
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram, 695551 Kerala, India
| | - Sreelakshmi Venugopalan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram, 695551 Kerala, India
| | - Malavika Krishnan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram, 695551 Kerala, India
| | - Basudev Sahoo
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram, 695551 Kerala, India
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27
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Nguyen K, Nguyen V, Tran H, Pham P. Organo-photocatalytic C-H bond oxidation: an operationally simple and scalable method to prepare ketones with ambient air. RSC Adv 2023; 13:7168-7178. [PMID: 36891491 PMCID: PMC9986805 DOI: 10.1039/d3ra00332a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Accepted: 02/17/2023] [Indexed: 03/08/2023] Open
Abstract
Oxidative C-H functionalization with O2 is a sustainable strategy to convert feedstock-like chemicals into valuable products. Nevertheless, eco-friendly O2-utilizing chemical processes, which are scalable yet operationally simple, are challenging to develop. Here, we report our efforts, via organo-photocatalysis, in devising such protocols for catalytic C-H bond oxidation of alcohols and alkylbenzenes to ketones using ambient air as the oxidant. The protocols employed tetrabutylammonium anthraquinone-2-sulfonate as the organic photocatalyst which is readily available from a scalable ion exchange of inexpensive salts and is easy to separate from neutral organic products. Cobalt(ii) acetylacetonate was found to be greatly instrumental to oxidation of alcohols and therefore was included as an additive in evaluating the alcohol scope. The protocols employed a nontoxic solvent, could accommodate a variety of functional groups, and were readily scaled to 500 mmol scale in a simple batch setting using round-bottom flasks and ambient air. A preliminary mechanistic study of C-H bond oxidation of alcohols supported the validity of one possible mechanistic pathway, nested in a more complex network of potential pathways, in which the anthraquinone form - the oxidized form - of the photocatalyst activates alcohols and the anthrahydroquinone form - the relevant reduced form of the photocatalyst - activates O2. A detailed mechanism, which reflected such a pathway and was consistent with previously accepted mechanisms, was proposed to account for formation of ketones from aerobic C-H bond oxidation of both alcohols and alkylbenzenes.
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Affiliation(s)
- Ky Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University Hanoi Vietnam
| | - Van Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University Hanoi Vietnam
| | - Hieu Tran
- Faculty of Chemistry, University of Science, Vietnam National University Hanoi Vietnam
| | - Phong Pham
- Faculty of Chemistry, University of Science, Vietnam National University Hanoi Vietnam
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28
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Whitmarsh-Everiss T, Wang Z, Hauberg Hansen C, Depta L, Sassetti E, Rafn Dan O, Pahl A, Sievers S, Laraia L. Identification of Biologically Diverse Tetrahydronaphthalen-2-ols through the Synthesis and Phenotypic Profiling of Chemically Diverse, Estradiol-Inspired Compounds. Chembiochem 2023; 24:e202200555. [PMID: 36594441 DOI: 10.1002/cbic.202200555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 01/02/2023] [Accepted: 01/02/2023] [Indexed: 01/04/2023]
Abstract
Combining natural product fragments to design new scaffolds with unprecedented bioactivity is a powerful strategy for the discovery of tool compounds and potential therapeutics. However, the choice of fragments to couple and the biological screens to employ remain open questions in the field. By choosing a primary fragment containing the A/B ring system of estradiol and fusing it to nine different secondary fragments, we were able to identify compounds that modulated four different phenotypes: inhibition of autophagy and osteoblast differentiation, as well as potassium channel and tubulin modulation. The latter two were uncovered by using unbiased morphological profiling with a cell-painting assay. The number of hits and variety in bioactivity discovered validates the use of recombining natural product fragments coupled to phenotypic screening for the rapid identification of biologically diverse compounds.
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Affiliation(s)
- Thomas Whitmarsh-Everiss
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, 2800, Kgs Lyngby, Denmark
| | - Zhou Wang
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, 2800, Kgs Lyngby, Denmark
| | - Cecilie Hauberg Hansen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, 2800, Kgs Lyngby, Denmark
| | - Laura Depta
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, 2800, Kgs Lyngby, Denmark
| | - Elisa Sassetti
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, 2800, Kgs Lyngby, Denmark
| | - Oliver Rafn Dan
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, 2800, Kgs Lyngby, Denmark
| | - Axel Pahl
- Max Planck Institute of Molecular Physiology, Otto-Hahn-Strasse 11, Dortmund, 44227, Germany
| | - Sonja Sievers
- Max Planck Institute of Molecular Physiology, Otto-Hahn-Strasse 11, Dortmund, 44227, Germany
| | - Luca Laraia
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, 2800, Kgs Lyngby, Denmark
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29
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Ertl P, Altmann E, Racine S. The most common linkers in bioactive molecules and their bioisosteric replacement network. Bioorg Med Chem 2023; 81:117194. [PMID: 36773350 DOI: 10.1016/j.bmc.2023.117194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/31/2023] [Accepted: 01/31/2023] [Indexed: 02/05/2023]
Abstract
Structures of the large majority of bioactive molecules are composed of several rings that are decorated by substituents and connected by linkers. While numerous cheminformatics studies focusing on rings and substituents are available, practically nothing has been published about the third important structural constituent of bioactive molecules - the linkers. The current study attempts to fill this gap. The most common linkers present in bioactive molecules are identified, their properties analyzed and a method for linker similarity search introduced. The bioisosteric replacement network of linkers is generated based on a large corpus of structure-activity data from medicinal chemistry literature. The results are presented in a graphical form and the underlying data are also made available for download. This analysis is intended to help medicinal chemists to better understand the role of linkers, particularly heterocyclic rings in bioactive molecules and to select an optimal set of linkers in their future project.
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Affiliation(s)
- Peter Ertl
- Global Discovery Chemistry, Novartis Institutes for BioMedical Research, CH-4056 Basel, Switzerland.
| | - Eva Altmann
- Global Discovery Chemistry, Novartis Institutes for BioMedical Research, CH-4056 Basel, Switzerland
| | - Sophie Racine
- Global Discovery Chemistry, Novartis Institutes for BioMedical Research, CH-4056 Basel, Switzerland
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30
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Whyte A, Yoon TP. Selective Cross-Ketonization of Carboxylic Acids Enabled by Metallaphotoredox Catalysis. Angew Chem Int Ed Engl 2022; 61:e202213739. [PMID: 36318472 PMCID: PMC9771944 DOI: 10.1002/anie.202213739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Indexed: 11/30/2022]
Abstract
Carboxylic acids are attractive building blocks for synthetic chemistry because they are chemically stable, abundant, and commercially available with substantial structural diversity. The process of combining two carboxylic acids to furnish a ketone is termed ketonization. This is a potentially valuable transformation that has been underutilized in organic synthesis due to the harsh reaction conditions generally required and the lack of selectivity obtained when coupling two distinct carboxylic acids. We report herein a metallaphotoredox strategy that selectively generates unsymmetrical ketones via cross-ketonization of two structurally dissimilar carboxylic acids. Cross-selectivity is achieved by exploiting divergent reactivity of differentially substituted acids towards critical one- and two-electron processes in the proposed coupling mechanism. This method is broadly applicable to a variety of functionalized carboxylic acids. It can also be applied to acids of similar steric profile by exploiting differences in their relative rates of decarboxylation.
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Affiliation(s)
- Andrew Whyte
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison WI 53706 (USA)
| | - Tehshik P. Yoon
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison WI 53706 (USA)
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31
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Grigalunas M, Patil S, Krzyzanowski A, Pahl A, Flegel J, Schölermann B, Xie J, Sievers S, Ziegler S, Waldmann H. Unprecedented Combination of Polyketide Natural Product Fragments Identifies the New Hedgehog Signaling Pathway Inhibitor Grismonone. Chemistry 2022; 28:e202202164. [PMID: 36083197 PMCID: PMC10091983 DOI: 10.1002/chem.202202164] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Indexed: 11/09/2022]
Abstract
Pseudo-natural products (pseudo-NPs) are de novo combinations of natural product (NP) fragments that define novel bioactive chemotypes. For their discovery, new design principles are being sought. Previously, pseudo-NPs were synthesized by the combination of fragments originating from biosynthetically unrelated NPs to guarantee structural novelty and novel bioactivity. We report the combination of fragments from biosynthetically related NPs in novel arrangements to yield a novel chemotype with activity not shared by the guiding fragments. We describe the synthesis of the polyketide pseudo-NP grismonone and identify it as a structurally novel and potent inhibitor of Hedgehog signaling. The insight that the de novo combination of fragments derived from biosynthetically related NPs may also yield new biologically relevant compound classes with unexpected bioactivity may be considered a chemical extension or diversion of existing biosynthetic pathways and greatly expands the opportunities for exploration of biologically relevant chemical space by means of the pseudo-NP principle.
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Affiliation(s)
- Michael Grigalunas
- Max Planck Institute of Molecular PhysiologyDepartment of Chemical BiologyDortmund44227Germany
| | - Sohan Patil
- Max Planck Institute of Molecular PhysiologyDepartment of Chemical BiologyDortmund44227Germany
| | - Adrian Krzyzanowski
- Max Planck Institute of Molecular PhysiologyDepartment of Chemical BiologyDortmund44227Germany
- Technical University DortmundFaculty of ChemistryChemical BiologyDortmund44227Germany
| | - Axel Pahl
- Max Planck Institute of Molecular PhysiologyDepartment of Chemical BiologyDortmund44227Germany
- Compound Management and Screening CenterDortmund44227Germany
| | - Jana Flegel
- Max Planck Institute of Molecular PhysiologyDepartment of Chemical BiologyDortmund44227Germany
| | - Beate Schölermann
- Max Planck Institute of Molecular PhysiologyDepartment of Chemical BiologyDortmund44227Germany
| | - Jianing Xie
- Max Planck Institute of Molecular PhysiologyDepartment of Chemical BiologyDortmund44227Germany
| | - Sonja Sievers
- Max Planck Institute of Molecular PhysiologyDepartment of Chemical BiologyDortmund44227Germany
- Compound Management and Screening CenterDortmund44227Germany
| | - Slava Ziegler
- Max Planck Institute of Molecular PhysiologyDepartment of Chemical BiologyDortmund44227Germany
| | - Herbert Waldmann
- Max Planck Institute of Molecular PhysiologyDepartment of Chemical BiologyDortmund44227Germany
- Technical University DortmundFaculty of ChemistryChemical BiologyDortmund44227Germany
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32
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Whyte A, Yoon TP. Selective Cross‐Ketonization of Carboxylic Acids Enabled by Metallaphotoredox Catalysis. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202213739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Affiliation(s)
- Andrew Whyte
- Department of Chemistry University of Wisconsin-Madison 1101 University Avenue Madison WI 53706 USA
| | - Tehshik P. Yoon
- Department of Chemistry University of Wisconsin-Madison 1101 University Avenue Madison WI 53706 USA
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33
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Kerackian T, Bouyssi D, Pilet G, Médebielle M, Monteiro N, Vantourout JC, Amgoune A. Nickel-Catalyzed Electro-Reductive Cross-Coupling of Aliphatic N-Acyl Imides with Alkyl Halides as a Strategy for Dialkyl Ketone Synthesis: Scope and Mechanistic Investigations. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Taline Kerackian
- Université Lyon, Université Lyon 1, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS, UMR 5246 du CNRS), 1 rue Victor Grignard, 69100 Villeurbanne, France
| | - Didier Bouyssi
- Université Lyon, Université Lyon 1, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS, UMR 5246 du CNRS), 1 rue Victor Grignard, 69100 Villeurbanne, France
| | - Guillaume Pilet
- Université Lyon, Université Lyon 1, Laboratoire des Multimatériaux et Interfaces (LMI, UMR 5615 du CNRS), 6 rue Victor Grignard, 69100 Villeurbanne, France
| | - Maurice Médebielle
- Université Lyon, Université Lyon 1, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS, UMR 5246 du CNRS), 1 rue Victor Grignard, 69100 Villeurbanne, France
| | - Nuno Monteiro
- Université Lyon, Université Lyon 1, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS, UMR 5246 du CNRS), 1 rue Victor Grignard, 69100 Villeurbanne, France
| | - Julien C. Vantourout
- Université Lyon, Université Lyon 1, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS, UMR 5246 du CNRS), 1 rue Victor Grignard, 69100 Villeurbanne, France
| | - Abderrahmane Amgoune
- Université Lyon, Université Lyon 1, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS, UMR 5246 du CNRS), 1 rue Victor Grignard, 69100 Villeurbanne, France
- Institut Universitaire de France (IUF), 1 rue Descartes, 75231 Paris, France
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34
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Singha T, Rouf Samim Mondal A, Midya S, Prasad Hari D. The Dowd–Beckwith Reaction: History, Strategies, and Synthetic Potential. Chemistry 2022; 28:e202202025. [DOI: 10.1002/chem.202202025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Tushar Singha
- Department of Organic Chemistry Indian Institute of Scienece Bangalore 560012 India
| | | | - Suparnak Midya
- Department of Organic Chemistry Indian Institute of Scienece Bangalore 560012 India
| | - Durga Prasad Hari
- Department of Organic Chemistry Indian Institute of Scienece Bangalore 560012 India
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