1
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Bagad PK, Darole RS, Krishna GR, Senthilkumar B. Highly Selective C-N and C-S Dual Functionalization of 1,3-Dicarbonyl Derivatives Using TBHP as an Oxidant. J Org Chem 2024; 89:9371-9380. [PMID: 38913603 DOI: 10.1021/acs.joc.4c00612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
A direct electrosynthesis/photocatalyst-free, atom-economical, and efficient method for the selective synthesis of (E)-3-amino-2-thiocyanato-α,β-unsaturated carbonyl compounds is described through a given protocol. The present approach features the use of inexpensive ammonium thiocyanate to achieve dual functionalization of 1,3-dicarbonyl compounds using TBHP as an oxidant, providing a rapid and practical route to the selective formation of both C-N and C-S bonds via a radical process. This method offers a broad substrate scope with excellent yield and allows for further exploration of the products to construct heterocyclic compounds and other functionalities.
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Affiliation(s)
- Pooja K Bagad
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
| | - Ratanamala S Darole
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
| | - G Rama Krishna
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
| | - Beeran Senthilkumar
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
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2
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Yang Q, Huang S, Yin L, Wang Z, Chen X, Huang C. NBS-Promoted Synthesis of Thiocyanated Aminomaleimides and Site-Selective Intramolecular Cyclization Access to 1,4-Benzothiazepines via S-CN Bond Cleavage. J Org Chem 2024; 89:5266-5276. [PMID: 38592168 DOI: 10.1021/acs.joc.3c02607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/10/2024]
Abstract
A transition metal-free concise and efficient protocol for the synthesis of thiocyanated aminomaleimides and benzo[e][1,4]thiazepine derivatives has been developed. The method involves an initial α-C-H thiocyanation of aminomaleimides with KSCN and TEMPO-mediated tandem S-CN bond cleavage/intramolecular cyclization substitution processes, which enables the formation of seven-membered S/N-heterocycles. This synthetic strategy provides a reliable method for the synthesis of biologically interesting benzo[e][1,4]thiazepine derivatives by using KSCN as sulfur sources as well as expands the application of enaminones thiocyanation reactions in heterocycles synthesis.
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Affiliation(s)
- Qi Yang
- National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, School of Chemistry and Environment, Yunnan Minzu University, Kunming 650500, P.R. China
- School of Chemistry and Resource Engineering, Honghe University, Mengzi 661199, P.R. China
| | - Shuntao Huang
- National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, School of Chemistry and Environment, Yunnan Minzu University, Kunming 650500, P.R. China
| | - Lu Yin
- National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, School of Chemistry and Environment, Yunnan Minzu University, Kunming 650500, P.R. China
| | - Zhuoyu Wang
- National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, School of Chemistry and Environment, Yunnan Minzu University, Kunming 650500, P.R. China
| | - Xuebing Chen
- School of Chemistry and Resource Engineering, Honghe University, Mengzi 661199, P.R. China
| | - Chao Huang
- National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, School of Chemistry and Environment, Yunnan Minzu University, Kunming 650500, P.R. China
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3
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Liu L, Wen C, Sun G, Li Y, Zhang J, Zhang Z, Wang Z, She M, Liu P, Zhang S, Li J. Multisite-Sequential Cyclization To Construct 1,2,4-Triazole-Based N-Fused Heterocyclics. Org Lett 2023; 25:1530-1535. [PMID: 36852941 DOI: 10.1021/acs.orglett.3c00322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
A feasible protocol that uses atomic groups (KSCN, KSeCN, and NH2CN), o-bromobenzoyl hydrazides, and formyls as reaction factors to synthesize N-fused 1,2,4-triazole with benzothiazides, benzoselenazinones, and quinazolinones was proposed. The method overcomes the lengthy multistep synthesis, narrow substrate scope, and toxicity challenge induced by the use or production of hazardous substances. It also enables the development of fused-heterocyclic selenium and quinazolinone derivatives. Their fluorescent performance further demonstrates the practicability of this methodology.
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Affiliation(s)
- Lang Liu
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Changting Wen
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Guojin Sun
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Yao Li
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Jun Zhang
- College of Chemistry and Chemical Engineering, Ningxia University Yinchuan, Ningxia, 750021, P. R. China
| | - Zhe Zhang
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Zesi Wang
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Mengyao She
- Ministry of Education Key Laboratory of Resource Biology and Modern Biotechnology in Western China, The College of Life Sciences, Faculty of Life and Health Science, Northwest University, Xi'an, Shaanxi Province 710069, P. R. China
| | - Ping Liu
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Shengyong Zhang
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Jianli Li
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Xi'an Key Laboratory of Functional Supramolecular Structure and Materials, College of Chemistry & Materials Science, Northwest University, Xi'an, Shaanxi 710127, P. R. China
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4
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Liu Y, Zhang T, Wan JP. Ultrasound-Promoted Synthesis of α-Thiocyanoketones via Enaminone C═C Bond Cleavage and Tunable One-Pot Access to 4-Aryl-2-aminothiazoles. J Org Chem 2022; 87:8248-8255. [PMID: 35616657 DOI: 10.1021/acs.joc.2c00708] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Ultrasound has been successfully employed to promote the thiocyanation of the C═C bond in enaminones for the synthesis of α-thiocyanoketones and 2-aminothiazoles. The reactions of enaminones with ammonium thiocyanate provide α-thiocyanoketones with ultrasound irradiation at room temperature. More interestingly, simply further heating the vessel after ultrasonic irradiation leads to the selective synthesis of 2-aminothiazoles with an unconventional 4-aryl substructure.
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Affiliation(s)
- Yunyun Liu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Tao Zhang
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Jie-Ping Wan
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
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5
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Matsui D, Tanimori S. A quick and easy access to a series of thiocyanated enaminones and 2‐iminothiazolones using
PIDA
under mild conditions. J Heterocycl Chem 2022. [DOI: 10.1002/jhet.4492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Daiki Matsui
- Department of Applied Life Sciences Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1‐1 Gakuencho, Nakaku, Sakai Osaka Japan
| | - Shinji Tanimori
- Department of Applied Life Sciences Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1‐1 Gakuencho, Nakaku, Sakai Osaka Japan
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6
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Xiao J, Ai Z, Li X, Tao S, Zhao B, Wang X, Wang X, Du Y. Synthesis of 3-thiocyanated chromones via TCCA/NH4SCN-mediated cyclization/thiocyanation of alkynyl aryl ketones. GREEN SYNTHESIS AND CATALYSIS 2021. [DOI: 10.1016/j.gresc.2021.12.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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7
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Li W, Wu Q, Xu G, Sun Y, Huang C, Liu T. A Practical Synthesis of
N
‐aryl/
N
‐alkyl 4‐Pyridones under Continuous Flow Technology. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100584] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Weiqiang Li
- National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials School of Chemistry and Environment Yunnan Minzu University Kunming 650500 P. R. China
| | - Qin Wu
- National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials School of Chemistry and Environment Yunnan Minzu University Kunming 650500 P. R. China
| | - Genrui Xu
- National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials School of Chemistry and Environment Yunnan Minzu University Kunming 650500 P. R. China
| | - Yinjing Sun
- College of Chemistry and Environmental Science Qujing Normal University Qujing 655011 P. R. China
| | - Chao Huang
- National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials School of Chemistry and Environment Yunnan Minzu University Kunming 650500 P. R. China
| | - Teng Liu
- College of Chemistry and Environmental Science Qujing Normal University Qujing 655011 P. R. China
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8
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An Z, Liu Y, Zhao P, Yan R. I
2
‐Promoted [3+2] Cyclization of 1,3‐Diketones with Potassium Thiocyanate: a Route to Thiazol‐2(3
H
)‐One Derivatives. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100228] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Zhenyu An
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 Gansu People's Republic of China
| | - Yafeng Liu
- Chemical Science and Engineering College North Minzu University Yinchuan 750000 People's Republic of China
| | - Pengbo Zhao
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 Gansu People's Republic of China
| | - Rulong Yan
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 Gansu People's Republic of China
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9
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Wei Z, Zhang Q, Tang M, Zhang S, Zhang Q. Diversity-Oriented Synthesis of 1,2,4-Triazols, 1,3,4-Thiadiazols, and 1,3,4-Selenadiazoles from N-Tosylhydrazones. Org Lett 2021; 23:4436-4440. [PMID: 33988376 DOI: 10.1021/acs.orglett.1c01379] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The diversity-oriented synthesis of 1,2,4-triazols, 1,3,4-thiadiazols, and 1,3,4-selenadiazoles from N-tosylhydrazones was developed, and the reactions were general for a wide range of substrates, in which NH2CN, KOCN, KSCN, and KSeCN were used as odorless sources. Two different pathways were proposed, and N-tosylhydrazonoyl chlorides were formed in situ in the presence of NCS.
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Affiliation(s)
- Zeyang Wei
- School of Pharmacy, Lanzhou University, Lanzhou 730000, P. R. China
| | - Qi Zhang
- School of Pharmacy, Lanzhou University, Lanzhou 730000, P. R. China
| | - Meng Tang
- School of Pharmacy, Lanzhou University, Lanzhou 730000, P. R. China
| | - Siyu Zhang
- School of Pharmacy, Lanzhou University, Lanzhou 730000, P. R. China
| | - Qian Zhang
- School of Pharmacy, Lanzhou University, Lanzhou 730000, P. R. China
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10
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Chen XB, Huang ST, Li J, Yang Q, Yang L, Yu F. Highly Regioselective and Chemoselective [3 + 3] Annulation of Enaminones with ortho-Fluoronitrobenzenenes: Divergent Synthesis of Aposafranones and Their N-Oxides. Org Lett 2021; 23:3032-3037. [PMID: 33792341 DOI: 10.1021/acs.orglett.1c00710] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A base-promoted unprecedented strategy for the regioselective and chemoselective divergent synthesis of highly functionalized aposafranones and their N-oxides has been developed from the [3 + 3] annulation of enaminones with o-fluoronitrobenzenenes. This novel synthetic strategy offers an alternative method for the construction of aposafranones and their N-oxides are meaningful in the fields of both biology and organic synthesis. The established protocol explores the annulation scope of enaminones, and it expands the application of nitro-based cyclization.
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Affiliation(s)
- Xue-Bing Chen
- College of Science, Honghe University, Mengzi, 661199, Yunnan, China
| | - Shun-Tao Huang
- College of Science, Honghe University, Mengzi, 661199, Yunnan, China
| | - Jie Li
- College of Science, Honghe University, Mengzi, 661199, Yunnan, China
| | - Qi Yang
- College of Science, Honghe University, Mengzi, 661199, Yunnan, China
| | - Li Yang
- College of Science, Honghe University, Mengzi, 661199, Yunnan, China
| | - Fuchao Yu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650504, People's Republic of China
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11
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Gu Q, Wang Q, Dai W, Wang X, Ban Y, Liu T, Zhao Y, Zhang Y, Ling Y, Zeng X. K 2S 2O 8-mediated regio- and stereo-selective thiocyanation of enamides with NH 4SCN. Org Biomol Chem 2021; 19:2512-2516. [PMID: 33662088 DOI: 10.1039/d1ob00156f] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A direct and straightforward thiocyanation of enamides with NH4SCN under metal-free conditions has been accomplished. A variety of (E)-β-thiocyanoenamides are readily produced in a regio- and stereo-selective manner. The protocol features mild reaction conditions, good functional group tolerance and operational simplicity. The potential utility of this strategy was further demonstrated by transformation of thiocyanate into thiotetrazole-containing compounds and a Pd-catalyzed cross-coupling reaction to afford six- or seven-membered sulfur-containing heterocycles. Mechanistic insights into the reaction indicate that the reaction may proceed via a radical mechanism.
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Affiliation(s)
- Qingyun Gu
- School of Pharmacy, Nantong University, 19 Qixiu Road, Nantong, Jiangsu Province 226001, People's Republic of China.
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12
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Wen KG, Liu C, Wei DH, Niu YF, Peng YY, Zeng XP. Catalytic Enantioselective Desymmetrization of Cyclobutane-1,3-diones by Carbonyl-Amine Condensation. Org Lett 2021; 23:1118-1122. [DOI: 10.1021/acs.orglett.1c00067] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Kai-Ge Wen
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and Jiangxi Key Laboratory of Green Chemistry, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Chao Liu
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and Jiangxi Key Laboratory of Green Chemistry, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Dong-Hui Wei
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and Jiangxi Key Laboratory of Green Chemistry, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Yan-Fei Niu
- Shanghai Key Laboratory of Green Chemistry and Chemical Process, East China Normal University, Shanghai 200062, China
| | - Yi-Yuan Peng
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and Jiangxi Key Laboratory of Green Chemistry, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Xing-Ping Zeng
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and Jiangxi Key Laboratory of Green Chemistry, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
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13
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Patel RI, Sharma S, Sharma A. Cyanation: a photochemical approach and applications in organic synthesis. Org Chem Front 2021. [DOI: 10.1039/d1qo00162k] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review summarises the photocatalytic cyanation strategies to construct C(sp2)–CN, C(sp3)–CN and X–CN (X = N, S) bonds.
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Affiliation(s)
- Roshan I. Patel
- Department of Chemistry
- Indian Institute of Technology Roorkee
- Roorkee-247667
- India
| | - Shivani Sharma
- Department of Chemistry
- Indian Institute of Technology Roorkee
- Roorkee-247667
- India
| | - Anuj Sharma
- Department of Chemistry
- Indian Institute of Technology Roorkee
- Roorkee-247667
- India
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14
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Hu G, Li P, Zhou Z, Yang F, Xu S, Fan H, Zhao X, Zhang X. NBS-assisted palladium-catalyzed bromination/cross-coupling reaction of 2-alkynyl arylazides with KSCN: an efficient method to synthesize 3-thiocyanindoles. NEW J CHEM 2021. [DOI: 10.1039/d0nj05894g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
An efficient NBS-assisted palladium-catalyzed bromination/cross-coupling synthesis of 3-thiocyanindoles from 2-alkynyl arylazides with KSCN has been described.
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Affiliation(s)
- Guiwen Hu
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Ping Li
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Zhiqiang Zhou
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Fan Yang
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Shijie Xu
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Hui Fan
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Xuechun Zhao
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Xiaoxiang Zhang
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
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15
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Ali D, Panday AK, Choudhury LH. Hydrogen Peroxide-Mediated Rapid Room Temperature Metal-Free C(sp 2)-H Thiocyanation of Amino Pyrazoles, Amino Uracils, and Enamines. J Org Chem 2020; 85:13610-13620. [PMID: 33054213 DOI: 10.1021/acs.joc.0c01738] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A rapid metal- and additive-free room temperature method for C(sp2)-H thiocyanation of aminopyrazoles, aminoisoxazole, aminoisothiazole, amino uracils, and aliphatic enamines has been developed in an aqueous medium using hydrogen peroxide as a benign oxidant and ammonium thiocyanate as a thiocyanating agent. On the other hand, the reaction of hydrogen peroxide and ammonium thiocyanate followed by one-pot addition of NaOH provides the corresponding disulfides in the case of amino azoles, and pyrimidine-fused 2-amino thiazoles were observed in the case of aminouracils. The salient features of this method are the use of an eco-friendly oxidant, reaction tunability to access different products, wide substrate scope, and good to very good yields.
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Affiliation(s)
- Danish Ali
- Department of Chemistry, Indian Institute of Technology Patna, Bihta, Patna 801106, India
| | - Anoop Kumar Panday
- Department of Chemistry, Indian Institute of Technology Patna, Bihta, Patna 801106, India
| | - Lokman H Choudhury
- Department of Chemistry, Indian Institute of Technology Patna, Bihta, Patna 801106, India
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16
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R C, Pise A, Shah SK, D R, V S, Tiwari KN. Copper-Catalyzed Thiolation of Terminal Alkynes Employing Thiocyanate as the Sulfur Source Leading to Enaminone-Based Alkynyl Sulfides under Ambient Conditions. Org Lett 2020; 22:6557-6561. [PMID: 32806209 DOI: 10.1021/acs.orglett.0c02308] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A highly efficient protocol for copper-catalyzed thio-alkynylation of enaminone-based thiocyanates with terminal alkynes under mild conditions has been developed. This scalable amino group-directed thio-alkynylation proceeds in the open air with a broad substrate scope and an excellent yield. The demonstrated synthetic transformation creates the opportunity for a wide variety of sulfur-containing useful materials. Gram-scale synthesis and further synthetic transformations of alkynyl sulfides highlight the potential utility of the method.
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Affiliation(s)
- Chandran R
- National Institute of Pharmaceutical Education and Research (NIPER), Raebareli, Transit Campus, Bijnour-Sisendi Road, Lucknow 226002, India
| | - Ashwini Pise
- National Institute of Pharmaceutical Education and Research (NIPER), Raebareli, Transit Campus, Bijnour-Sisendi Road, Lucknow 226002, India
| | - Suraj Kumar Shah
- National Institute of Pharmaceutical Education and Research (NIPER), Raebareli, Transit Campus, Bijnour-Sisendi Road, Lucknow 226002, India
| | - Rahul D
- National Institute of Pharmaceutical Education and Research (NIPER), Raebareli, Transit Campus, Bijnour-Sisendi Road, Lucknow 226002, India
| | - Suman V
- National Institute of Pharmaceutical Education and Research (NIPER), Raebareli, Transit Campus, Bijnour-Sisendi Road, Lucknow 226002, India
| | - Keshri Nath Tiwari
- National Institute of Pharmaceutical Education and Research (NIPER), Raebareli, Transit Campus, Bijnour-Sisendi Road, Lucknow 226002, India
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17
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Koohgard M, Hosseinpour Z, Sarvestani AM, Hosseini-Sarvari M. ARS–TiO2 photocatalyzed direct functionalization of sp2 C–H bonds toward thiocyanation and cyclization reactions under visible light. Catal Sci Technol 2020. [DOI: 10.1039/c9cy02268f] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
An ARS–TiO2 photocatalyst has been prepared, by a simple method through stirring a mixture of ARS and TiO2 at room temperature in the dark, to extend the photocatalytic response of titanium dioxide toward the visible light spectrum.
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18
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Liu S, Li J, Lin J, Liu F, Liu T, Huang C. Substituent-controlled chemoselective synthesis of multi-substituted pyridones via a one-pot three-component cascade reaction. Org Biomol Chem 2020; 18:1130-1134. [DOI: 10.1039/c9ob02456e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A substituent-controlled chemoselective cycloaddition reaction which afforded a variety of 2-pyridones and 4-pyridones in good to excellent yields, respectively, has been developed.
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Affiliation(s)
- Shitao Liu
- National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials
- Key Laboratory of Intelligent Supramolecular Chemistry at the University of Yunnan Province
- School of Chemistry and Environment
- Yunnan Minzu University
- Kunming
| | - Jisen Li
- National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials
- Key Laboratory of Intelligent Supramolecular Chemistry at the University of Yunnan Province
- School of Chemistry and Environment
- Yunnan Minzu University
- Kunming
| | - Junjie Lin
- National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials
- Key Laboratory of Intelligent Supramolecular Chemistry at the University of Yunnan Province
- School of Chemistry and Environment
- Yunnan Minzu University
- Kunming
| | - Fujun Liu
- National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials
- Key Laboratory of Intelligent Supramolecular Chemistry at the University of Yunnan Province
- School of Chemistry and Environment
- Yunnan Minzu University
- Kunming
| | - Teng Liu
- Center for Yunnan-Guizhou Plateau Chemical Functional Materials and Pollution Control
- Qujing Normal University
- Qujing
- P. R. China
| | - Chao Huang
- National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials
- Key Laboratory of Intelligent Supramolecular Chemistry at the University of Yunnan Province
- School of Chemistry and Environment
- Yunnan Minzu University
- Kunming
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19
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Zhu F, Yan Z, Ai C, Wang Y, Lin S. I2
Promoted Synthesis of 2-Aminothiadiazoles Employing KSCN as a Sulfur Source Under Metal-Free Conditions. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901250] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Fuyuan Zhu
- College of Chemistry; Nanchang University; 999 Xuefu Dadao 330031 Nanchang Jiangxi Province P. R. China
| | - Zhaohua Yan
- College of Chemistry; Nanchang University; 999 Xuefu Dadao 330031 Nanchang Jiangxi Province P. R. China
| | - Chengmei Ai
- College of Chemistry; Nanchang University; 999 Xuefu Dadao 330031 Nanchang Jiangxi Province P. R. China
| | - Yanmei Wang
- College of Chemistry; Nanchang University; 999 Xuefu Dadao 330031 Nanchang Jiangxi Province P. R. China
| | - Sen Lin
- College of Chemistry; Nanchang University; 999 Xuefu Dadao 330031 Nanchang Jiangxi Province P. R. China
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20
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Chen XB, Xiong SL, Xie ZX, Wang YC, Liu W. Three-Component One-Pot Synthesis of Highly Functionalized Bis-Indole Derivatives. ACS OMEGA 2019; 4:11832-11837. [PMID: 31460292 PMCID: PMC6682060 DOI: 10.1021/acsomega.9b01159] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 06/25/2019] [Indexed: 05/10/2023]
Abstract
In this study, we detail the development of a concise and efficient three-component protocol for the regioselective synthesis of highly functionalized bis-indoles through a one-pot, two-step sequential process starting from enaminones 1, indoles 2, and acenaphthylene-1,2-dione 3 that is catalyzed by piperidine and p-methyl benzenesulfonic acid. This protocol has several advantages including simplicity of experimental operation, high efficiency of bond formation, ready availability and low cost of starting materials, environmentally benign conditions, and target molecular diversity.
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Affiliation(s)
- Xue-Bing Chen
- School
of Science, Honghe University, Mengzi, 661100 Yunnan, P. R. China
| | - Sheng-Li Xiong
- School
of Science, Honghe University, Mengzi, 661100 Yunnan, P. R. China
| | - Zhi-Xu Xie
- School
of Science, Honghe University, Mengzi, 661100 Yunnan, P. R. China
| | - Yong-Chao Wang
- School
of Vocational and Technical Education, Yunnan
Normal University, Kunming 650092, P. R. China
| | - Wei Liu
- School
of Science, Honghe University, Mengzi, 661100 Yunnan, P. R. China
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21
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Metal-free and efficient approach to 4-thiocyanated 2H-chromenes via TFA-mediated cascade cyclization of 2-propynolphenols. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.03.070] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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Wang C, Geng X, Zhao P, Zhou Y, Wu YD, Wu AX. Employing thiocyanate salts as a nitrogen source via CN bond cleavage: divergent synthesis of α-ketoamides and 2-acyloxazoles. Org Chem Front 2019. [DOI: 10.1039/c9qo00570f] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A switchable procedure for the synthesis of α-ketoamides and 2-acyloxazoles from aryl methyl ketones and thiocyanate salts is reported.
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Affiliation(s)
- Can Wang
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education
- College of Chemistry
- Central China Normal University
- Wuhan 430079
| | - Xiao Geng
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education
- College of Chemistry
- Central China Normal University
- Wuhan 430079
| | - Peng Zhao
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education
- College of Chemistry
- Central China Normal University
- Wuhan 430079
| | - You Zhou
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education
- College of Chemistry
- Central China Normal University
- Wuhan 430079
| | - Yan-Dong Wu
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education
- College of Chemistry
- Central China Normal University
- Wuhan 430079
| | - 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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23
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TBAI/K
2
S
2
O
8
‐Promoted Multicomponent Domino Reaction of Aryl Methyl Ketones, Enaminones, and Indoles: A Facile Access to Multisubstituted 3‐Indolyl‐pyrroles. ChemistrySelect 2018. [DOI: 10.1002/slct.201803317] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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24
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Zhou P, Hu B, Wang Y, Zhang Q, Li X, Yan S, Yu F. Convenient Synthesis of Quinoline-4-carboxylate Derivatives through the Bi(OTf)3
-Catalyzed Domino Cyclization/Esterification Reaction of Isatins with Enaminones in Alcohols. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800734] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Pan Zhou
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650504 Kunming P. R. China
| | - Biao Hu
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650504 Kunming P. R. China
| | - Yanqin Wang
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650504 Kunming P. R. China
| | - Qiaohe Zhang
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650504 Kunming P. R. China
| | - Xiang Li
- Research Center for Analysis and Measurement; Kunming University of Science and Technology; 650500 Kunming P. R. China
| | - Shengjiao Yan
- School of Chemical Science and Technology; Yunnan University; 650500 Kunming P. R. China
| | - Fuchao Yu
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650504 Kunming P. R. China
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25
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Zhou P, Hu B, Zhao S, Zhang Q, Wang Y, Li X, Yu F. An improved Pfitzinger reaction for the direct synthesis of quinoline-4-carboxylic esters/acids mediated by TMSCl. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.07.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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26
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Bai H, Sun R, Chen X, Yang L, Huang C. Microwave-Assisted, Solvent-Free, Three-Component Domino Protocol: Efficient Synthesis of Polysubstituted-2-Pyridone Derivatives. ChemistrySelect 2018. [DOI: 10.1002/slct.201800606] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hairui Bai
- Engineering Research Center of Biopolymer Functional Materials of Yunnan; School of Chemistry and Environment; Yunnan Minzu University, Kunming; 650500, P. R. China
| | - Rongrong Sun
- Engineering Research Center of Biopolymer Functional Materials of Yunnan; School of Chemistry and Environment; Yunnan Minzu University, Kunming; 650500, P. R. China
| | - Xuebing Chen
- Key Laboratory of Natural Pharmaceutical and Chemical Biology of Yunnan; School of Science; Honghe University, Mengzi; 661100, P. R. China
| | - Lijuan Yang
- Engineering Research Center of Biopolymer Functional Materials of Yunnan; School of Chemistry and Environment; Yunnan Minzu University, Kunming; 650500, P. R. China
| | - Chao Huang
- Engineering Research Center of Biopolymer Functional Materials of Yunnan; School of Chemistry and Environment; Yunnan Minzu University, Kunming; 650500, P. R. China
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27
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Hu B, Zhou P, Rao K, Yang J, Li L, Yan S, Yu F. Copper-catalyzed direct oxidative C(sp 2 )-H α -sulfenylation of enaminones with disulfides or thiophenols: Synthesis of polyfunctionalized aminothioalkenes. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.02.079] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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28
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Chen XB, Gong JW, Zhang XD, Liu XL, Liu W, Wang YC. Catalyst-free concise synthesis of multi-functional 3-cyano-4-quinolinone derivatives from cyanoacetylenaminones and DMF-DMA. Tetrahedron 2018. [DOI: 10.1016/j.tet.2017.12.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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29
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Liu FJ, Sun TT, Yang YG, Huang C, Chen XB. Divergent synthesis of dual 1,4-dihydropyridines with different substituted patterns from enaminones and aldehydes through domino reactions. RSC Adv 2018; 8:12635-12640. [PMID: 35541228 PMCID: PMC9079339 DOI: 10.1039/c8ra01236a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 03/26/2018] [Indexed: 11/21/2022] Open
Abstract
A concise and efficient protocol for the regioselective synthesis of dual 1,4-dihydropyridines with several substituted patterns has been developed from a cascade cyclization of enaminones and aldehydes in different media (EtOH/CH3CN). The one-pot cascade reaction involves at least five reactive sites and generates multiple C–C and C–N bonds. The established protocol explores the chemistry of enaminones by employing their three reactive sites. The method has several advantages including mild conditions, operational simplicity, and high bond-forming efficiency. It may offer promise in a variety of biochemical applications. A concise and efficient protocol for the regioselective synthesis of dual 1,4-dihydropyridines with several substituted patterns has been developed from a cascade cyclization of enaminones and aldehydes in different media (EtOH/CH3CN).![]()
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Affiliation(s)
- Fu-Jun Liu
- Key Laboratory of Natural Pharmaceutical and Chemical Biology of Yunnan Province
- School of Science
- Honghe University
- Mengzi
- China
| | - Tian-Tian Sun
- Key Laboratory of Natural Pharmaceutical and Chemical Biology of Yunnan Province
- School of Science
- Honghe University
- Mengzi
- China
| | - Yun-Gang Yang
- Key Laboratory of Natural Pharmaceutical and Chemical Biology of Yunnan Province
- School of Science
- Honghe University
- Mengzi
- China
| | - Chao Huang
- School of Chemistry and Environment
- Engineering Research Center of Biopolymer Functional Materials of Yunnan
- Yunnan Minzu University
- Kunming
- China
| | - Xue-Bing Chen
- Key Laboratory of Natural Pharmaceutical and Chemical Biology of Yunnan Province
- School of Science
- Honghe University
- Mengzi
- China
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30
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Zhou P, Hu B, Yang J, Li L, Rao K, Zhu D, Yu F. Two Complementary Cyclization Reactions for the Chemoselective Synthesis of Spirooxindoles. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701413] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Pan Zhou
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650504 Kunming P. R. China
| | - Biao Hu
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650504 Kunming P. R. China
| | - Jiao Yang
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650504 Kunming P. R. China
| | - Lingdan Li
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650504 Kunming P. R. China
| | - Kairui Rao
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650504 Kunming P. R. China
| | - Daofei Zhu
- Faculty of Metallurgical and Energy Engineering; Kunming University of Science and Technology; 650500 Kunming P. R. China
| | - Fuchao Yu
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650504 Kunming P. R. China
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31
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Zhou P, Hu B, Li L, Rao K, Yang J, Yu F. Mn(OAc)3-Promoted Oxidative Csp3–P Bond Formation through Csp2–Csp2 and P–H Bond Cleavage: Access to β-Ketophosphonates. J Org Chem 2017; 82:13268-13276. [DOI: 10.1021/acs.joc.7b02391] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Pan Zhou
- Faculty of Life Science and
Technology, Kunming University of Science and Technology, Kunming, 650500, P. R. China
| | - Biao Hu
- Faculty of Life Science and
Technology, Kunming University of Science and Technology, Kunming, 650500, P. R. China
| | - Lingdan Li
- Faculty of Life Science and
Technology, Kunming University of Science and Technology, Kunming, 650500, P. R. China
| | - Kairui Rao
- Faculty of Life Science and
Technology, Kunming University of Science and Technology, Kunming, 650500, P. R. China
| | - Jiao Yang
- Faculty of Life Science and
Technology, Kunming University of Science and Technology, Kunming, 650500, P. R. China
| | - Fuchao Yu
- Faculty of Life Science and
Technology, Kunming University of Science and Technology, Kunming, 650500, P. R. China
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32
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Dwivedi V, Rajesh M, Kumar R, Kant R, Sridhar Reddy M. A stereoselective thiocyanate conjugate addition to electron deficient alkynes and concomitant cyclization to N,S-heterocycles. Chem Commun (Camb) 2017; 53:11060-11063. [DOI: 10.1039/c7cc06081e] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A regio- and stereoselective thiocyanate addition to ynones and the concomitant cyclizations of resultant vinyl thiocyanate to access thio-aza heterocycles are achieved using KSCN in AcOH without the need of any metal catalyst.
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Affiliation(s)
- Vikas Dwivedi
- Medicinal & Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031
- India
| | - Manda Rajesh
- Medicinal & Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031
- India
| | - Ravi Kumar
- Medicinal & Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031
- India
- Academy of Scientific and Innovative Research
| | - Ruchir Kant
- MSB Division
- CSIR-Central Drug Research Institute
- Lucknow 226031
- India
| | - Maddi Sridhar Reddy
- Medicinal & Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031
- India
- Academy of Scientific and Innovative Research
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