1
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Zhang T, Feng H. Skeletal Editing of Isatins for Heterocycle Molecular Diversity. CHEM REC 2024; 24:e202400024. [PMID: 38847062 DOI: 10.1002/tcr.202400024] [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: 02/01/2024] [Indexed: 06/28/2024]
Abstract
Isatins have been widely used in the preparation of a variety of heterocyclic compounds, where the skeletal editing of isatins has shown significant advantages for the construction of diverse heterocycles. This review highlights the progress made in the last decade (2013-2023) in the skeletal editing of the isatin scaffold. A series of ring expansion reactions for the construction of quinoline skeleton, quinolone skeleton, polycyclic quinazoline skeleton, medium-sized ring skeleton, as well as a series of ring opening reactions for the generation of 2-(azoly)aniline skeleton by the cleavage of C-C bond and C-N bond are highlighted. It is hoped that this review will provide some understanding of the chemical transformations of isatins and contribute to the further realization of its molecular diversity.
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Affiliation(s)
- Tiantian Zhang
- Shanghai Frontiers Science Research Center for Druggability of Cardiovascular Noncoding RNA, College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China
| | - Huangdi Feng
- Shanghai Frontiers Science Research Center for Druggability of Cardiovascular Noncoding RNA, College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China
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2
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Bentonite catalyzed solvent-free synthesis of N′-(2-oxoindolin-3-ylidene) benzohydrazide derivatives under microwave irradiation. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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3
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Pan Y, Liu Z, Zou P, Chen Y, Chen Y. Hypervalent Iodine Reagents Enable C(sp 2)-H Amidation of (Hetero)arenes with Iminophenylacetic Acids. Org Lett 2022; 24:6681-6685. [PMID: 36043941 DOI: 10.1021/acs.orglett.2c02751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Sulfonamide-containing (hetero)arenes are widely present in bioactive molecules. Here, we report the sulfonamidyl (hetero)arenes synthesis by the C(sp2)-H amidation from bench-stable amidyl-iminophenylacetic acids. The hypervalent iodine reagents covalently activated iminophenylacetic acids for the facile sulfonamidyl radical generation under mild photocatalytic oxidative conditions. Diversified indoles, pyrroles, imidazopyridines, and fused arenes underwent the C(sp2)-H amidation with excellent chemoselectivity and regioselectivity. This reaction performs well under neutral aqueous conditions with potential biological applications.
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Affiliation(s)
- Yue Pan
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032 China.,Department of Chemistry, Shanghai University, 99 Shangda Road, Shanghai 200444 China
| | - Zhengyi Liu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032 China
| | - Peng Zou
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032 China
| | - Yali Chen
- Department of Chemistry, Shanghai University, 99 Shangda Road, Shanghai 200444 China
| | - Yiyun Chen
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032 China.,School of Physical Science and Technology, ShanghaiTech University, 100 Haike Road, Shanghai 201210 China.,School of Chemistry and Material Sciences, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou 310024, China
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4
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Wu XF, Chen Z, Liu L, zhang Y, Yang Z. Copper‐Catalyzed Decarbonylative Cyclization of Isatins and Trifluoroacetimidohydrazides for the Synthesis of 2‐(5‐Trifluoromethyl‐1,2,4‐triazol‐3‐yl)anilines. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202101397] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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5
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Alavinia S, Ghorbani-Vaghei R. The preparation, characterization and catalytic activity of Ni NPs supported on porous alginate- g-poly( p-styrene sulfonamide- co-acrylamide). RSC Adv 2021; 11:29728-29740. [PMID: 35479525 PMCID: PMC9040858 DOI: 10.1039/d1ra04022g] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Accepted: 08/23/2021] [Indexed: 12/13/2022] Open
Abstract
Herein, we report the synthesis of nickel nanoparticles under mild conditions using porous alginate-g-poly(p-styrene sulfonamide-co-acrylamide) as a protecting/stabilizing agent and sodium borohydride as a reducing agent. The porous cross-linked polymeric support was prepared via combining the use of sol-gel, nanocasting, and crosslinking techniques, in which the p-styrene sulfonamide monomer (PSSA) and N,N'-methylene-bis (acrylamide) (MBA) cross-linker underwent copolymerization on the surface of sodium alginate in the presence of a SiO2 nanoparticle (NP) template (Alg-PSSA-co-ACA). The prepared catalyst (Alg-PSSA-co-ACA@Ni) showed high catalytic activity for the one-step synthesis of 1,3,4-oxadiazoles from the reaction of hydrazides and aryl iodides through isocyanide insertion/cyclization.
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Affiliation(s)
- Sedigheh Alavinia
- Department of Chemistry, Bu-Ali Sina University 65174 Hamedan Iran +98 81 38380647
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6
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Qian P, Liu J, Zhang Y, Wang Z. Tunable Electrosynthesis of Anthranilic Acid Derivatives via a C-C Bond Cleavage of Isatins. J Org Chem 2021; 86:16008-16015. [PMID: 34260858 DOI: 10.1021/acs.joc.1c01017] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A facile and direct electrocatalytic C-C bond cleavage/functionalization reaction of isatins was developed. With isatins as the amino-attached C1 sources, a variety of aminobenzoates, and aminobenzamides were synthesized in moderate to good yields under mild conditions.
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Affiliation(s)
- Peng Qian
- School of Chemistry and Material Engineering, Engineering Research Center of Biomass Conversion and Pollution Prevention of Anhui Educational Institutions, Fuyang Normal University, Fuyang, Anhui 236037, People's Republic of China
| | - Jiaojiao Liu
- School of Chemistry and Material Engineering, Engineering Research Center of Biomass Conversion and Pollution Prevention of Anhui Educational Institutions, Fuyang Normal University, Fuyang, Anhui 236037, People's Republic of China
| | - Yan Zhang
- Hefei National Laboratory for Physical Sciences at Microscale, Technology & School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Zhiyong Wang
- Hefei National Laboratory for Physical Sciences at Microscale, Technology & School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
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7
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Luo N, Sun ZW, Xu XX, Hu XQ, Jia FC. A transition-metal-free, base-promoted annulation/ring-cleavage/ring-reconstruction cascade reaction: a facile access to N-protection free indole-indenones. Org Chem Front 2021. [DOI: 10.1039/d1qo01280k] [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
An unprecedented base-promoted reaction of 2-halogenated arylglyoxals with 2-oxindoles is accomplished under metal-free conditions, furnishing a wide range of biologically important (NH)-indeno[2,1-b]indol-6(5H)-ones in useful to good yields.
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Affiliation(s)
- Na Luo
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430073, China
| | - Zhen-Wei Sun
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430073, China
| | - Xing-Xin Xu
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430073, China
| | - Xiao-Qiang Hu
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, School of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan 430074, China
| | - Feng-Cheng Jia
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430073, China
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8
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Qian P, Zhou Z, Wang L, Wang Z, Wang Z, Zhang Z, Sheng L. Electrosynthesis of 2-(1,3,4-Oxadiazol-2-yl)aniline Derivatives with Isatins as Amino-Attached C1 Sources. J Org Chem 2020; 85:13029-13036. [DOI: 10.1021/acs.joc.0c01700] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Peng Qian
- School of Chemistry and Material Engineering, Engineering Research Center of Biomass Conversion and Pollution Prevention of Anhui Educational Institutions, Fuyang Normal University, Fuyang, Anhui 236037, P. R. China
| | - Zhenghong Zhou
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Li Wang
- School of Chemistry and Material Engineering, Engineering Research Center of Biomass Conversion and Pollution Prevention of Anhui Educational Institutions, Fuyang Normal University, Fuyang, Anhui 236037, P. R. China
| | - Zhicheng Wang
- School of Chemistry and Material Engineering, Engineering Research Center of Biomass Conversion and Pollution Prevention of Anhui Educational Institutions, Fuyang Normal University, Fuyang, Anhui 236037, P. R. China
| | - Zhongwei Wang
- School of Chemistry and Material Engineering, Engineering Research Center of Biomass Conversion and Pollution Prevention of Anhui Educational Institutions, Fuyang Normal University, Fuyang, Anhui 236037, P. R. China
| | - Zhenlei Zhang
- School of Chemistry and Material Engineering, Engineering Research Center of Biomass Conversion and Pollution Prevention of Anhui Educational Institutions, Fuyang Normal University, Fuyang, Anhui 236037, P. R. China
| | - Liangquan Sheng
- School of Chemistry and Material Engineering, Engineering Research Center of Biomass Conversion and Pollution Prevention of Anhui Educational Institutions, Fuyang Normal University, Fuyang, Anhui 236037, P. R. China
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9
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Wang LC, Du S, Chen Z, Wu XF. FeCl 3-Mediated Synthesis of 2-(Trifluoromethyl)quinazolin-4(3 H)-ones from Isatins and Trifluoroacetimidoyl Chlorides. Org Lett 2020; 22:5567-5571. [PMID: 32610908 DOI: 10.1021/acs.orglett.0c01927] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
An FeCl3-mediated cascade coupling/decarbonylative annulation reaction for the efficient construction of 2-(trifluoromethyl)quinazolin-4(3H)-ones has been developed. This transformation employs readily available isatins and trifluoroacetimidoyl chlorides as the starting materials, providing a facile and practical route to diverse biologically relevant quinazolin-4(3H)-one derivatives. A plausible reaction pathway has been proposed based on the mechanistic observations.
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Affiliation(s)
- Le-Cheng Wang
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
| | - Shiying Du
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
| | - Zhengkai Chen
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
| | - Xiao-Feng Wu
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China.,Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Rostock, 18059, Germany
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10
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Singh M, Vaishali, Paul AK, Singh V. Isatin as a 2-aminobenzaldehyde surrogate: transition metal-free efficient synthesis of 2-(2'-aminophenyl)benzothiazole derivatives. Org Biomol Chem 2020; 18:4459-4469. [PMID: 32490470 DOI: 10.1039/d0ob00888e] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A transition metal-free, convenient, and efficient practical approach has been devised for the synthesis of substituted 2-(2'-aminophenyl)benzothiazoles via a sulfur insertion strategy using isatin derivatives as 2-aminobenzaldehyde surrogates. KI assisted one-pot operation of isatin, arylamines and elemental sulfur resulted in the formation of a C-N and two C-S bonds and cascade cleavage of the isatin ring resulting in the formation of 2-(2'-aminophenyl)benzothiazoles. The significant features of this strategy are the readily available and inexpensive starting materials, broad substrate scope, sustainable reaction conditions and high yield of products. Importantly, the strategy was found to be appropriate for gram scale synthesis (>10 g) of 2-(2'-aminophenyl)benzothiazole derivatives. Moreover, the excellent photophysical properties (ΦF up to 60%) of 2-(2'-aminophenyl)benzothiazole derivatives provide huge scope in materials science.
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Affiliation(s)
- Manpreet Singh
- Department of Chemistry, Dr B R Ambedkar National Institute of Technology (NIT) Jalandhar, 144011, Punjab, India.
| | - Vaishali
- Department of Chemistry, Dr B R Ambedkar National Institute of Technology (NIT) Jalandhar, 144011, Punjab, India.
| | - Avijit Kumar Paul
- Department of Chemistry, National Institute of Technology (NIT) Kurukshetra, 136119, Haryana, India
| | - Virender Singh
- Department of Chemistry, Dr B R Ambedkar National Institute of Technology (NIT) Jalandhar, 144011, Punjab, India. and Department of Chemistry, Central University of Punjab, Bathinda, 151001, Punjab, India. virender.singh.cup.edu.in
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11
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Lu F, Gong F, Li L, Zhang K, Li Z, Zhang X, Yin Y, Wang Y, Gao Z, Zhang H, Lei A. Electrochemical Synthesis of 2,5-Disubstituted 1,3,4-Oxadiazoles from α-Keto Acids and Acylhydrazines Under Mild Conditions. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000311] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Fangling Lu
- College of Chemistry and Chemical Engineering; Shaanxi Normal University Xi'an; 710119 Xi'an Shaanxi P.R.China
| | - Fengping Gong
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; 330022 Nanchang Jiangxi P. R. China
| | - Liangsen Li
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; 330022 Nanchang Jiangxi P. R. China
| | - Kan Zhang
- College of Chemistry and Chemical Engineering; Shaanxi Normal University Xi'an; 710119 Xi'an Shaanxi P.R.China
| | - Zhen Li
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; 330022 Nanchang Jiangxi P. R. China
| | - Xinwei Zhang
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; 330022 Nanchang Jiangxi P. R. China
| | - Ying Yin
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; 330022 Nanchang Jiangxi P. R. China
| | - Ying Wang
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; 330022 Nanchang Jiangxi P. R. China
| | - Ziwei Gao
- College of Chemistry and Chemical Engineering; Shaanxi Normal University Xi'an; 710119 Xi'an Shaanxi P.R.China
| | - Heng Zhang
- College of Chemistry and Molecular Sciences; the Institute for Advanced Studies (IAS); Wuhan University; 430072 Wuhan Hubei P. R. China
| | - Aiwen Lei
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; 330022 Nanchang Jiangxi P. R. China
- College of Chemistry and Molecular Sciences; the Institute for Advanced Studies (IAS); Wuhan University; 430072 Wuhan Hubei P. R. China
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12
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Facile synthesis of 1,3,4-oxadiazoles via iodine promoted oxidative annulation of methyl-azaheteroarenes and hydrazides. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130887] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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13
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Zhao Q, Ren L, Hou J, Yu W, Chang J. Annulation Reactions of In-Situ-Generated N-(Het)aroyldiazenes with Isothiocyanates Leading to 2-Imino-1,3,4-oxadiazolines. Org Lett 2019; 21:210-213. [PMID: 30547596 DOI: 10.1021/acs.orglett.8b03663] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A novel annulation reaction of N-(het)aroyldiazenes and isothiocyanates has been established. This transformation involves a sequential cyclization and desulfurization/intramolecular rearrangement to produce 2-imino-1,3,4-oxadiazolines. The less-stable N-(het)aroyldiazenes can be conveniently generated in situ by I2-mediated oxidation of hydrazides, which allows a one-pot synthesis of the products directly from readily accessible hydrazide and isothiocyanate substrates. This operationally simple synthetic process requires no use of malodorous isocyanides and can be conveniently conducted on a gram scale.
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Affiliation(s)
- Qiongli Zhao
- College of Chemistry and Molecular Engineering; Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province; School of Pharmaceutical Sciences , Zhengzhou University , Zhengzhou , Henan Province 450001 , China
| | - Linning Ren
- College of Chemistry and Molecular Engineering; Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province; School of Pharmaceutical Sciences , Zhengzhou University , Zhengzhou , Henan Province 450001 , China
| | - Jiao Hou
- College of Chemistry and Molecular Engineering; Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province; School of Pharmaceutical Sciences , Zhengzhou University , Zhengzhou , Henan Province 450001 , China
| | - Wenquan Yu
- College of Chemistry and Molecular Engineering; Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province; School of Pharmaceutical Sciences , Zhengzhou University , Zhengzhou , Henan Province 450001 , China
| | - Junbiao Chang
- College of Chemistry and Molecular Engineering; Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province; School of Pharmaceutical Sciences , Zhengzhou University , Zhengzhou , Henan Province 450001 , China
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14
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Singh D, Tiwari SK, Singh V. A transition metal-free approach towards synthesis of β-carboline tethered 1,3,4-oxadiazoles via oxidative C–O bond formation. NEW J CHEM 2019. [DOI: 10.1039/c8nj04294b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
An efficient protocol has been developed for one-pot synthesis of biologically interesting β-carboline substituted 1,3,4-oxadiazoles via an I2-assisted oxidative C–O bond formation strategy.
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Affiliation(s)
- Dharmender Singh
- Department of Chemistry
- Dr B R Ambedkar National Institute of Technology (NIT)
- Jalandhar
- India
| | - Sandip Kumar Tiwari
- Drug Discovery and Molecular Synthesis Lab
- Centre of Biomedical Research
- SGPGIMS
- Lucknow- 226014
- India
| | - Virender Singh
- Department of Chemistry
- Dr B R Ambedkar National Institute of Technology (NIT)
- Jalandhar
- India
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15
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Angapelly S, Ramya PVS, Sodhi R, Angeli A, Rangan K, Nagesh N, Supuran CT, Arifuddin M. Iodine-mediated one-pot intramolecular decarboxylation domino reaction for accessing functionalised 2-(1,3,4-oxadiazol-2-yl)anilines with carbonic anhydrase inhibitory action. J Enzyme Inhib Med Chem 2018. [PMID: 29536768 PMCID: PMC6010027 DOI: 10.1080/14756366.2018.1443447] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
A practical and transition metal-free one-pot domino synthesis of diversified (1,3,4-oxadiazol-2-yl)anilines has been developed employing isatins and hydrazides as the starting materials, in the presence of molecular iodine. The prominent feature of this domino process involves consecutive condensation, hydrolytic ring cleavage, and an intramolecular decarboxylation, in a one-pot process that leads to the oxidative formation of a C–O bond. Fluorescence properties of some of the representative molecules obtained in this way were studied. The synthesised 2-(1,3,4-oxadiazolo-2-yl)aniline-benzene sulphonamides (8a–o) were screened for their carbonic anhydrase (CA, EC 4.2.1.1) inhibitory activity. Most of the compounds exhibited low micromolar to nanomolar activity against human (h) isoforms hCA I, hCA II, hCA IV, and XII, with some compounds displaying selective CA inhibitory activity towards hCA II with KIs of 6.4–17.6 nM.
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Affiliation(s)
- Srinivas Angapelly
- a National Institute of Pharmaceutical Education and Research (NIPER) - Hyderabad , Hyderabad , India
| | - P V Sri Ramya
- a National Institute of Pharmaceutical Education and Research (NIPER) - Hyderabad , Hyderabad , India
| | - Rohini Sodhi
- a National Institute of Pharmaceutical Education and Research (NIPER) - Hyderabad , Hyderabad , India
| | - Andrea Angeli
- b Neurofarba Department , Sezione di Scienze Farmaceutiche e Nutraceutiche, University of Florence , Florence , Italy
| | - Krishnan Rangan
- c Birla Institute of Technology & Science, Pilani , Hyderabad , India
| | - Narayana Nagesh
- d Center for Cellular and Molecular Biology (CCMB) , Hyderabad , India
| | - Claudiu T Supuran
- b Neurofarba Department , Sezione di Scienze Farmaceutiche e Nutraceutiche, University of Florence , Florence , Italy
| | - Mohammed Arifuddin
- a National Institute of Pharmaceutical Education and Research (NIPER) - Hyderabad , Hyderabad , India
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16
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Stepek IA, Bode JW. Synthetic fermentation of bioactive molecules. Curr Opin Chem Biol 2018; 46:18-24. [PMID: 29627458 DOI: 10.1016/j.cbpa.2018.03.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 03/18/2018] [Accepted: 03/22/2018] [Indexed: 02/08/2023]
Abstract
The concept of synthetic fermentation is to 'grow' complex organic molecules in a controlled and predictable manner by combining small molecule building blocks in water-without the need for reagents, enzymes, or organisms. This approach mimics the production of small mixtures of structurally related natural products by living organisms, particularly microbes, under conditions compatible with direct screening of the cultures for biological activity. This review discusses the development and implementation of this concept, its use for the discovery of protease inhibitors, its basis as a chemistry outreach program allowing non-specialists to make and discover new antibiotics, and highlights of related approaches.
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Affiliation(s)
- Iain A Stepek
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences, ETH-Zürich, 8093 Zürich, Switzerland
| | - Jeffrey W Bode
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences, ETH-Zürich, 8093 Zürich, Switzerland; Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Chikusa, Nagoya 464-8602, Japan.
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17
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Wang L, Wang Y, Chen Q, He M. Photocatalyzed facile synthesis of 2,5-diaryl 1,3,4-oxadiazoles with polyaniline- g-C3N4-TiO2 composite under visible light. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.03.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Tokumaru K, Bera K, Johnston JN. 1,3,4-Oxadiazole and Heteroaromatic-Fused 1,2,4-Triazole Synthesis using Diverted Umpolung Amide Synthesis. SYNTHESIS-STUTTGART 2018; 49:4670-4675. [PMID: 29507449 DOI: 10.1055/s-0036-1590802] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Umpolung Amide Synthesis (UmAS) has emerged as a superior alternative to conventional amide synthesis methods based on carbonyl electrophiles in a range of situations, particularly when epimerization-prone couplings are prescribed. In an unanticipated development during our most recent studies, it was discovered that diacyl hydrazide products from UmAS were not formed as intermediates when using an acyl hydrazide as the amine acceptor. This resulted in a new preparation of 1,3,4-oxadiazoles from α-bromonitroalkane donors. We hypothesized that a key tetrahedral intermediate in UmAS was diverted toward a more direct pathway to the heterocycle product rather than through formation of the diacyl hydrazide, a typical oxadiazole progenitor. In studies reported here, diversion to 1,2,4-triazole products is described, a behavior hypothesized to also result from an analogous tetrahedral intermediate, but one formed from heteroaromatic hydrazine acceptors.
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Affiliation(s)
- Kazuyuki Tokumaru
- Department of Chemistry, and Institute of Chemical Biology, Vanderbilt University, Nashville, TN 37235
| | - Kalisankar Bera
- Department of Chemistry, and Institute of Chemical Biology, Vanderbilt University, Nashville, TN 37235
| | - Jeffrey N Johnston
- Department of Chemistry, and Institute of Chemical Biology, Vanderbilt University, Nashville, TN 37235
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19
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Hubert JG, Stepek IA, Noda H, Bode JW. Synthetic fermentation of β-peptide macrocycles by thiadiazole-forming ring-closing reactions. Chem Sci 2018; 9:2159-2167. [PMID: 29719689 PMCID: PMC5896468 DOI: 10.1039/c7sc05057g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2017] [Accepted: 01/05/2018] [Indexed: 01/12/2023] Open
Abstract
A new thiadiazole-forming macrocyclization reaction enables the one-pot synthesis of cyclic β-peptide libraries from readily accessible building blocks without additional reagents.
Macrocyclic β-peptides were efficiently prepared using a thiadiazole-forming cyclization reaction between an α-ketoacid and a thiohydrazide. The linear β-peptide precursors were assembled from isoxazolidine monomers by α-ketoacid-hydroxylamine (KAHA) ligations with a bifunctional initiator – a process we have termed ‘synthetic fermentation’ due to the analogy of producing natural product-like molecules from simpler building blocks. The linear synthetic fermentation products underwent Boc-deprotection/thiadiazole-forming macrocyclization under aqueous, acidic conditions to provide the cyclic products in a one-pot process. This reaction sequence proceeds from easily accessed initiator and monomer building blocks without the need for additional catalysts or reagents, enabling facile production of macrocyclic β-peptides, a relatively underexplored structural class.
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Affiliation(s)
- Jonathan G Hubert
- Laboratorium für Organische Chemie , Department of Chemistry and Applied Biosciences , ETH Zürich , Zürich , Switzerland 8093 . ; http://www.bode.ethz.ch
| | - Iain A Stepek
- Laboratorium für Organische Chemie , Department of Chemistry and Applied Biosciences , ETH Zürich , Zürich , Switzerland 8093 . ; http://www.bode.ethz.ch
| | - Hidetoshi Noda
- Institute of Microbial Chemistry (Bikaken) , 3-14-23 Kamiosaki, Shinagawa-ku , Tokyo 141-0021 , Japan
| | - Jeffrey W Bode
- Laboratorium für Organische Chemie , Department of Chemistry and Applied Biosciences , ETH Zürich , Zürich , Switzerland 8093 . ; http://www.bode.ethz.ch
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20
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Synthesis of 2,5-disubstituted 1,3,4-oxadiazoles by visible-light-mediated decarboxylation–cyclization of hydrazides and diketones. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.01.037] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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21
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Jia FC, Xu C, Wang YW, Chen ZP, Chen YF, Wu AX. Copper-catalyzed ambient-temperature decarboxylative annulation of isatins with amidine hydrochlorides: a facile access to 2-(1,3,5-triazin-2-yl)aniline derivatives. Org Biomol Chem 2018; 16:4223-4226. [DOI: 10.1039/c8ob00904j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A copper-catalyzed domino protocol for the synthesis of 2-(1,3,5-triazin-2-yl)anilines has been developed from isatins and amidine hydrochlorides at ambient temperature.
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Affiliation(s)
- Feng-Cheng Jia
- School of Chemistry and Environmental Engineering
- Wuhan Institute of Technology
- Wuhan 430073
- China
| | - Cheng Xu
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education
- College of Chemistry
- Central China Normal University
- Wuhan 430079
| | - Yu-Wei Wang
- School of Chemistry and Environmental Engineering
- Wuhan Institute of Technology
- Wuhan 430073
- China
| | - Zhi-Peng Chen
- School of Chemistry and Environmental Engineering
- Wuhan Institute of Technology
- Wuhan 430073
- China
| | - Yun-Feng Chen
- School of Chemistry and Environmental Engineering
- Wuhan Institute of Technology
- Wuhan 430073
- China
| | - An-Xin Wu
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education
- College of Chemistry
- Central China Normal University
- Wuhan 430079
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22
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Jiang Q, Qi X, Zhang C, Ji X, Li J, Liu R. Oxidant- and hydrogen acceptor-free palladium catalyzed dehydrogenative cyclization of acylhydrazones to substituted oxadiazoles. Org Chem Front 2018. [DOI: 10.1039/c7qo00749c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
An efficient method for the synthesis of 2,5-disubstituted 1,3,4-oxadiazoles has been developed through palladium(0) catalyzed dehydrogenative cyclization ofN-arylidenearoylhydrazides without oxidants and hydrogen acceptors.
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Affiliation(s)
- Qiangqiang Jiang
- School of Pharmacy
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Xinghui Qi
- School of Pharmacy
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Chenyang Zhang
- School of Pharmacy
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Xuan Ji
- School of Pharmacy
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Jin Li
- China Catalyst Holding Co
- Ltd
- Dalian 116699
- China
| | - Renhua Liu
- School of Pharmacy
- East China University of Science and Technology
- Shanghai 200237
- China
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23
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Wang P, Fu Y, Wu P, Guo X, Chen B. Convenient Access to C4-Dicarbonylation of Anilines by Iodine-Promoted Oxidative Cross-Coupling Reactions. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700212] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Panpan Wang
- State Key Laboratory of Applied Organic Chemistry Lanzhou University; Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization; Lanzhou 730000 China
| | - Yajie Fu
- State Key Laboratory of Applied Organic Chemistry Lanzhou University; Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization; Lanzhou 730000 China
| | - Ping Wu
- State Key Laboratory of Applied Organic Chemistry Lanzhou University; Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization; Lanzhou 730000 China
| | - Xin Guo
- State Key Laboratory of Applied Organic Chemistry Lanzhou University; Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization; Lanzhou 730000 China
| | - Baohua Chen
- State Key Laboratory of Applied Organic Chemistry Lanzhou University; Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization; Lanzhou 730000 China
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24
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Synthesis of 2-Amino-1,3,4-oxadiazoles through Elemental Sulfur Promoted Cyclization of Hydrazides with Isocyanides. CHINESE J CHEM 2017. [DOI: 10.1002/cjoc.201700188] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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25
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Zhou ZW, Jia FC, Xu C, Jiang SF, Wu YD, Wu AX. A concise construction of 12H-benzo[4,5]thiazolo[2,3-b]quinazolin-12-ones via an unusual TBHP/Na2CO3 promoted cascade oxidative cyclization and interrupted Dimroth rearrangement. Chem Commun (Camb) 2017; 53:1056-1059. [DOI: 10.1039/c6cc09376k] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
An interrupted Dimroth rearrangement was merged into the oxidative cyclization between isatins and 2-haloaryl isothiocyanates, giving 12H-benzo[4,5]thiazolo[2,3-b]quinazolin-12-one derivatives.
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Affiliation(s)
- Zhi-Wen Zhou
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education
- College of Chemistry
- Central China Normal University
- Hubei
| | - Feng-Cheng Jia
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education
- College of Chemistry
- Central China Normal University
- Hubei
| | - Cheng Xu
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education
- College of Chemistry
- Central China Normal University
- Hubei
| | - Shi-Fen Jiang
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education
- College of Chemistry
- Central China Normal University
- Hubei
| | - Yan-Dong Wu
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education
- College of Chemistry
- Central China Normal University
- Hubei
| | - An-Xin Wu
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education
- College of Chemistry
- Central China Normal University
- Hubei
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26
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Gao P, Wang J, Bai Z, Cheng H, Xiao J, Lai M, Yang D, Fan M. One-pot cyclization/decarboxylation of α-keto acids and acylhydrazines for the synthesis of 2,5-disubstituted 1,3,4-oxadiazoles under transition-metal-free conditions. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.09.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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27
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Fan XY, Jiang X, Zhang Y, Chen ZB, Zhu YM. Palladium-catalyzed one-pot synthesis of diazoles via tert-butyl isocyanide insertion. Org Biomol Chem 2016; 13:10402-8. [PMID: 26328529 DOI: 10.1039/c5ob01328c] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
An efficient one-pot palladium-catalyzed reaction for the synthesis of diazoles from readily available hydrazides and aryl halide via isocyanide insertion/cyclization sequence has been developed. This methodology efficiently constructs diazoles in good to excellent yields with the advantages of wide functional group tolerance and operational simplicity.
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Affiliation(s)
- Xiang-Yuan Fan
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China.
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28
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Fan Y, He Y, Liu X, Hu T, Ma H, Yang X, Luo X, Huang G. Iodine-Mediated Domino Oxidative Cyclization: One-Pot Synthesis of 1,3,4-Oxadiazoles via Oxidative Cleavage of C(sp2)–H or C(sp)–H Bond. J Org Chem 2016; 81:6820-5. [DOI: 10.1021/acs.joc.6b01135] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yuxing Fan
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu, 730000, P. R. China
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Lanzhou, 730000, P. R. China
| | - Yongqin He
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu, 730000, P. R. China
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Lanzhou, 730000, P. R. China
| | - Xingxing Liu
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu, 730000, P. R. China
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Lanzhou, 730000, P. R. China
| | - Ting Hu
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu, 730000, P. R. China
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Lanzhou, 730000, P. R. China
| | - Haojie Ma
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu, 730000, P. R. China
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Lanzhou, 730000, P. R. China
| | - Xiaodong Yang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu, 730000, P. R. China
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Lanzhou, 730000, P. R. China
| | - Xinliang Luo
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu, 730000, P. R. China
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Lanzhou, 730000, P. R. China
| | - Guosheng Huang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu, 730000, P. R. China
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Lanzhou, 730000, P. R. China
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29
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Jia FC, Zhou ZW, Xu C, Wu YD, Wu AX. Divergent Synthesis of Quinazolin-4(3H)-ones and Tryptanthrins Enabled by a tert-Butyl Hydroperoxide/K3PO4-Promoted Oxidative Cyclization of Isatins at Room Temperature. Org Lett 2016; 18:2942-5. [DOI: 10.1021/acs.orglett.6b01291] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Feng-Cheng Jia
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Hubei, Wuhan 430079, P. R. China
| | - Zhi-Wen Zhou
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Hubei, Wuhan 430079, P. R. China
| | - Cheng Xu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Hubei, Wuhan 430079, P. R. China
| | - Yan-Dong Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Hubei, Wuhan 430079, P. R. China
| | - An-Xin Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Hubei, Wuhan 430079, P. R. China
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
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30
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Wu X, Gao Q, Geng X, Zhang J, Wu YD, Wu AX. Iodine-Promoted Oxidative Cross-Coupling of Unprotected Anilines with Methyl Ketones: A Site-Selective Direct C–H Bond Functionalization to C4-Dicarbonylation of Anilines. Org Lett 2016; 18:2507-10. [DOI: 10.1021/acs.orglett.6b01162] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Xia Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Qinghe Gao
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Xiao Geng
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Jingjing Zhang
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Yan-dong Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, China
| | - An-xin Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, China
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31
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Lu XX, Luo YH, Liu YS, Ma WW, Xu Y, Zhang H. Assembly of three stable POM-based pillar-layer CuI coordination polymers with visible light driven photocatalytic properties. CrystEngComm 2016. [DOI: 10.1039/c6ce00332j] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three new 3D POM-based CuI coordination polymers have been successfully prepared by a hydrothermal reaction. Compounds 1–3 show remarkably high heat stability, acid and alkali resistance, and effectively degrade methylene blue within visible light range.
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Affiliation(s)
- Xin-Xin Lu
- Institute of Polyoxometalate Chemistry
- Department of Chemistry
- Northeast Normal University
- Changchun, PR China
| | - Yu-Hui Luo
- Institute of Polyoxometalate Chemistry
- Department of Chemistry
- Northeast Normal University
- Changchun, PR China
- Department of Chemical Engineering
| | - Yu-Shuang Liu
- Institute of Polyoxometalate Chemistry
- Department of Chemistry
- Northeast Normal University
- Changchun, PR China
| | - Wen-Wen Ma
- Institute of Polyoxometalate Chemistry
- Department of Chemistry
- Northeast Normal University
- Changchun, PR China
| | - Yan Xu
- Institute of Polyoxometalate Chemistry
- Department of Chemistry
- Northeast Normal University
- Changchun, PR China
| | - Hong Zhang
- Institute of Polyoxometalate Chemistry
- Department of Chemistry
- Northeast Normal University
- Changchun, PR China
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32
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Kumar R, Arigela RK, Samala S, Kundu B. Diversity Oriented Synthesis of Indoloazepinobenzimidazole and Benzimidazotriazolobenzodiazepine from N(1)-Alkyne-1,2-diamines. Chemistry 2015; 21:18828-33. [PMID: 26525303 DOI: 10.1002/chem.201502956] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 09/14/2015] [Indexed: 12/20/2022]
Abstract
A one-pot protocol for the diversity oriented synthesis of two N-polyheterocycles indoloazepinobenzimidazole and benzimidazotriazolobenzodiazepine from a common N(1)-alkyne-1,2-diamine building block is described. The approach involves sequential formation of benzimidazole through cyclocondensation and oxidation, which is followed by the formation of either an azepine ring (through alkyne activation and 6-endo-dig cyclization, 1,2-migration with ring expansion, and re-aromatization), or diazepine and triazole rings through 1,3-dipolar cycloaddition.
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Affiliation(s)
- Ravi Kumar
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031 (India).,Academy of Scientific and Innovative Research, New Delhi, 110001 (India)
| | - Rajesh K Arigela
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031 (India)
| | - Srinivas Samala
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031 (India)
| | - Bijoy Kundu
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031 (India). .,Academy of Scientific and Innovative Research, New Delhi, 110001 (India).
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33
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Gao Q, Liu S, Wu X, Zhang J, Wu A. Direct Annulation of Hydrazides to 1,3,4-Oxadiazoles via Oxidative C(CO)–C(Methyl) Bond Cleavage of Methyl Ketones. Org Lett 2015; 17:2960-3. [DOI: 10.1021/acs.orglett.5b01241] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Qinghe Gao
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Shan Liu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Xia Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Jingjing Zhang
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Anxin Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
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