1
|
Ma T, Zheng Y, Huang S. SO 2ClF: A Reagent for Controllable Chlorination and Chlorooxidation of Simple Unprotected Indoles. J Org Chem 2023; 88:4839-4847. [PMID: 36931283 DOI: 10.1021/acs.joc.3c00039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
Abstract
Sulfuryl chlorofluoride was first employed as a versatile reagent for controllable chlorination and chlorooxidation of simple unprotected indoles. Three types of products including 3-chloro-indoles, 3-chloro-2-oxindoles, and 3,3-dichloro-2-oxindoles could be selectively obtained in good to excellent yields by switching the reaction solvents. The present method features easy-to-operate, broad substrate scope, and mild reaction conditions.
Collapse
Affiliation(s)
- Tianting Ma
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China
| | - Yu Zheng
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China
| | - Shenlin Huang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China
| |
Collapse
|
2
|
Shee M, Singh NDP. Chemical versatility of azide radical: journey from a transient species to synthetic accessibility in organic transformations. Chem Soc Rev 2022; 51:2255-2312. [PMID: 35229836 DOI: 10.1039/d1cs00494h] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The generation of azide radical (N3˙) occurs from its precursors primarily via a single electron transfer (SET) process or homolytic cleavage by chemical methods or advanced photoredox/electrochemical methods. This in situ generated transient open-shell species has unique characteristic features that set its reactivity. In the past, the azide radical was widely used for various studies in radiation chemistry as a 1e- oxidant of biologically important molecules, but now it is being exploited for synthetic applications based on its addition and intermolecular hydrogen atom transfer (HAT) abilities. Due to the significant role of nitrogen-containing molecules in synthesis, drug discovery, biological, and material sciences, the direct addition onto unsaturated bonds for the simultaneous construction of C-N bond with other (C-X) bonds are indeed worth highlighting. Moreover, the ability to generate O- or C-centered radicals by N3˙ via electron transfer (ET) and intermolecular HAT processes is also well documented. The purpose of controlling the reactivity of this short-lived intermediate in organic transformations drives us to survey: (i) the history of azide radical and its structural properties (thermodynamic, spectroscopic, etc.), (ii) chemical reactivities and kinetics, (iii) methods to produce N3˙ from various precursors, (iv) several significant azide radical-mediated transformations in the field of functionalization with unsaturated bonds, C-H functionalization via HAT, tandem, and multicomponent reaction with a critical analysis of underlying mechanistic approaches and outcomes, (v) concept of taming the reactivity of azide radicals for potential opportunities, in this review.
Collapse
Affiliation(s)
- Maniklal Shee
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India.
| | - N D Pradeep Singh
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India.
| |
Collapse
|
3
|
Gurawa A, Kumar M, Kashyap S. Selective Azidooxygenation of Alkenes Enabled by Photo-induced Radical Transfer Using Aryl-λ 3-azidoiodane Species. ACS OMEGA 2021; 6:26623-26639. [PMID: 34661016 PMCID: PMC8515593 DOI: 10.1021/acsomega.1c03991] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 09/16/2021] [Indexed: 06/13/2023]
Abstract
The photolytic radical-induced vicinal azidooxygenation of synthetically important and diverse functionalized substrates including unactivated alkenes is reported. The photoredox-catalyst/additive-free protocol enables intermolecular oxyazidation by simultaneously incorporating two new functionalities; C-O and C-N across the C=C double bond in a selective manner. Mechanistic investigations reveal the intermediacy of the azidyl radical facilitated via the photolysis of λ3-azidoiodane species and cascade proceeding to generate an active carbon-centered radical. The late-stage transformations of azido- and oxy-moieties were amply highlighted by assembling high-value drug analogs and bioactive skeletons.
Collapse
|
4
|
Affiliation(s)
- Paramasivam Sivaguru
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Northeast Normal University, Changchun 130024, China
| | - Yongquan Ning
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Northeast Normal University, Changchun 130024, China
| | - Xihe Bi
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Northeast Normal University, Changchun 130024, China
| |
Collapse
|
5
|
Pounder A, Ho A, Macleod M, Tam W. Chemistry of Unsymmetrical C1-Substituted Oxabenzonorbornadienes. Curr Org Synth 2021; 18:446-474. [PMID: 33402089 DOI: 10.2174/1570179417666210105121115] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 11/23/2020] [Accepted: 11/30/2020] [Indexed: 11/22/2022]
Abstract
Oxabenzonorbornadiene (OBD) is a useful synthetic intermediate, which can be readily activated by transition metal complexes with great face selectivity due to its dual-faced nature and intrinsic angle strain on the alkene. To date, the understanding of transition-metal catalyzed reactions of OBD itself has burgeoned; however, this has not been the case for unsymmetrical OBDs. Throughout the development of these reactions, the nature of C1-substituent has proven to have a profound effect on both the reactivity and selectivity of the outcome of the reaction. Upon substitution, different modes of reactivity arise, contributing to the possibility of multiple stereo-, regio-, and in extreme cases, constitutional isomers, which can provide unique means of constructing a variety of synthetically useful cyclic frameworks. To maximize selectivity, an understanding of bridgehead substituent effects is crucial. To that end, this review outlines hitherto reported examples of bridgehead substituent effects on the chemistry of unsymmetrical C1-substituted OBDs.
Collapse
Affiliation(s)
- Austin Pounder
- Guelph-Waterloo Center for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
| | - Angel Ho
- Guelph-Waterloo Center for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
| | - Matthew Macleod
- Guelph-Waterloo Center for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
| | - William Tam
- Guelph-Waterloo Center for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
| |
Collapse
|
6
|
Ge L, Chiou MF, Li Y, Bao H. Radical azidation as a means of constructing C(sp3)-N3 bonds. GREEN SYNTHESIS AND CATALYSIS 2020. [DOI: 10.1016/j.gresc.2020.07.001] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
|
7
|
Sun WW, Chen N, Wei TT, You GJ, Yang H, Liu JK, Wu B. Environmentally Friendly Protocol for 2,3-Difunctionlization of Indole Derivatives. J Org Chem 2020; 85:10143-10151. [PMID: 32654483 DOI: 10.1021/acs.joc.0c01484] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Environmentally friendly and highly regioselective C-3 dichlorination and C-2 oxidation of N-substituted indoles have been established using NaCl as a chlorine source and H2O as an oxygen source. A series of 3,3-dichloro-2-oxindoles were obtained in moderate to excellent yields. The gram-scale synthesis and derivatization reaction were explored. The possible mechanism for this reaction was elucidated.
Collapse
Affiliation(s)
- Wen-Wu Sun
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China
| | - Na Chen
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China
| | - Ting-Ting Wei
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China
| | - Guo-Jing You
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China
| | - Hao Yang
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China
| | - Ji-Kai Liu
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China
| | - Bin Wu
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China
| |
Collapse
|
8
|
Gu Y, Dai L, Mao K, Zhang J, Wang C, Zhao L, Rong L. Time-Economical Radical Cascade Cyclization/Haloazidation of 1,6-Enynes: Construction of Highly Functional Succinimide Derivatives. Org Lett 2020; 22:2956-2960. [DOI: 10.1021/acs.orglett.0c00682] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yan Gu
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P.R. China
| | - Lei Dai
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P.R. China
| | - Kaimin Mao
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P.R. China
| | - Jinghang Zhang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P.R. China
| | - Chang Wang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P.R. China
| | - Liming Zhao
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P.R. China
| | - Liangce Rong
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P.R. China
| |
Collapse
|
9
|
Wei R, Xiong H, Ye C, Li Y, Bao H. Iron-Catalyzed Alkylazidation of 1,1-Disubstituted Alkenes with Diacylperoxides and TMSN 3. Org Lett 2020; 22:3195-3199. [PMID: 32227900 DOI: 10.1021/acs.orglett.0c00969] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
An iron-catalyzed radical alkylazidation of electron-deficient alkenes is reported. Alkyl diacyl peroxides work as the alkyl source, and trimethylsilyl azide acts as the azido reservoir. This method features mild reaction conditions, wide substrate scope, and good functional group tolerance, providing a range of α-azido esters, an α-azido ketone, and an α-azido cyanide in high yields. These azides can be easily transferred into many kinds of amino acid derivatives.
Collapse
Affiliation(s)
- Rongbiao Wei
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian 350002, P. R. of China.,College of Chemistry, Fuzhou University, 2 Xueyuan Road, Fuzhou, Fujian 350108, P. R. of China
| | - Haigen Xiong
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian 350002, P. R. of China
| | - Changqing Ye
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian 350002, P. R. of China
| | - Yajun Li
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian 350002, P. R. of China
| | - Hongli Bao
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian 350002, P. R. of China
| |
Collapse
|
10
|
Iodine(III) reagent (ABX—N3)-induced intermolecular anti-Markovnikov hydroazidation of unactivated alkenes. Sci China Chem 2019. [DOI: 10.1007/s11426-019-9628-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
11
|
Jiang X, Yang L, Yang W, Zhu Y, Fang L, Yu C. Controllable synthesis of 3-chloro- and 3,3-dichloro-2-oxindoles via hypervalent iodine-mediated chlorooxidation. Org Biomol Chem 2019; 17:6920-6924. [PMID: 31282524 DOI: 10.1039/c9ob01173k] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
An efficient and controllable protocol for the synthesis of 3-chloro- and 3,3-dichloro-2-oxindoles has been developed via hypervalent iodine-promoted chlorooxidation. By using two equivalents of 1-chloro-1,2-benziodoxol-3-(1H)-one, a wide range of indoles were transformed into 3-chloro-2-oxindoles in DMF/CF3CO2H/H2O at room temperature with good yields. As far as we know, this is the first report on the selective C-2 oxidation and C-3 monochlorination of simple indoles. In addition, three equivalents of the same hypervalent iodine afforded 3,3-dichloro-2-oxindoles in up to 99% yields under optimized conditions (dioxane/H2O, 80 °C). The method features mild reaction conditions, the widespread availability of the substrates, and good functional group tolerance.
Collapse
Affiliation(s)
- Xinpeng Jiang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P.R. China.
| | - Liechao Yang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P.R. China.
| | - Wenlong Yang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P.R. China.
| | - Yu Zhu
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P.R. China.
| | - Liyun Fang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P.R. China.
| | - Chuanming Yu
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P.R. China.
| |
Collapse
|
12
|
Jia Y, Chen L, Zhang H, Zheng Y, Jiang ZX, Yang Z. Electrophilic chloro(ω-alkoxy)lation of alkenes employing 1-chloro-1,2-benziodoxol-3-one: facile synthesis of β-chloroethers. Org Biomol Chem 2019; 16:7203-7213. [PMID: 30255191 DOI: 10.1039/c8ob01634h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A four-component reaction for electrophilic chloro(ω-alkoxy)lation of alkenes has been described. The stable chloro-iodine(iii) reagent and SOCl2 were used as electrophilic and nucleophilic chlorine sources, respectively. This approach provides a straightforward way to synthesize various useful β-chloro ω-chloroalkyl ethers from a wide range of alkenes, including electron-deficient, aromatic and unactivated alkenes. The synthetic applications of this approach were also explored in some useful transformations.
Collapse
Affiliation(s)
- Yimin Jia
- Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, P. R. China.
| | | | | | | | | | | |
Collapse
|
13
|
Leonova MV, Belaya NV, Baimuratov MR, Klimochkin YN. Synthesis and Transformations of 2-(Adamantan-1-yl)aziridine. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2019. [DOI: 10.1134/s1070428018110040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
14
|
Xu L, Chen J, Chu L. Solvent-tuned chemoselective carboazidation and diazidation of alkenes via iron catalysis. Org Chem Front 2019. [DOI: 10.1039/c8qo01142g] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A solvent-tuned chemoselective carboazidation and diazidation of alkenes with CH2Cl2 and TMSN3 through iron catalysis has been described.
Collapse
Affiliation(s)
- Lei Xu
- Center for Advanced Low-Dimension Materials
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
- Shanghai 201620
| | - Jian Chen
- Center for Advanced Low-Dimension Materials
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
- Shanghai 201620
| | - Lingling Chu
- Center for Advanced Low-Dimension Materials
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
- Shanghai 201620
| |
Collapse
|
15
|
Metal‐Free Regioselective Chloroazidation of Internal Alkynes. Chemistry 2018; 25:981-984. [DOI: 10.1002/chem.201805320] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Indexed: 12/12/2022]
|
16
|
Seidl FJ, Min C, Lopez JA, Burns NZ. Catalytic Regio- and Enantioselective Haloazidation of Allylic Alcohols. J Am Chem Soc 2018; 140:15646-15650. [PMID: 30403852 DOI: 10.1021/jacs.8b10799] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Herein we report a highly regio- and stereoselective haloazidation of allylic alcohols. This enantioselective reaction uses readily available materials and can be performed on a variety of alkyl-substituted alkenes and can incorporate either bromine or chlorine as the electrophilic halogen component. Both halide and azido groups of the resulting products can be transformed into valuable building blocks with complete stereospecificity. The first example of an enantioselective 1,4-haloazidation of a conjugated diene is reported as well as its application to a concise synthesis of an aza-sugar.
Collapse
Affiliation(s)
- Frederick J Seidl
- Department of Chemistry , Stanford University , Stanford , California 94305 , United States
| | - Chang Min
- Department of Chemistry , Stanford University , Stanford , California 94305 , United States
| | - Jovan A Lopez
- Department of Chemistry , Stanford University , Stanford , California 94305 , United States
| | - Noah Z Burns
- Department of Chemistry , Stanford University , Stanford , California 94305 , United States
| |
Collapse
|
17
|
Cai Y, Liu X, Zhou P, Feng X. Asymmetric Catalytic Halofunctionalization of α,β-Unsaturated Carbonyl Compounds. J Org Chem 2018; 84:1-13. [PMID: 30339377 DOI: 10.1021/acs.joc.8b01951] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Halofunctionalization methods enable the vicinal difunctionalization of alkenes with heteroatom nucleophiles and halogen moieties. As a fundamental transformation in organic synthesis, the catalytic asymmetric variants have only recently been reported. In sharp contrast to the asymmetric halocyclization of simple alkenes which involves a nucleophile-assisted alkene activation process, the asymmetric halofunctionalization of enones developed by our laboratory features an electrophile-assisted 1,4-addition pathway. Our work in this area has resulted in the development of several different types of regio-, diastereo-, and enantioselective processes, including inter- and intramolecular haloaminations, haloetherifications, and haloazidations. The scope, updated mechanism, limitations, and future perspective of these reactions are discussed.
Collapse
Affiliation(s)
- Yunfei Cai
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , China.,School of Chemistry and Chemical Engineering , Chongqing University , 174 Shazheng Street , Chongqing 400030 , China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , China
| | - Pengfei Zhou
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , China
| |
Collapse
|
18
|
Chen WT, Gao LH, Bao WH, Wei WT. Metal-Free C(sp3)–H Azidation in a Radical Strategy for the Synthesis of 3-Azido-2-oxindoles at Room Temperature. J Org Chem 2018; 83:11074-11079. [DOI: 10.1021/acs.joc.8b01678] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Wei-Ting Chen
- School of Materials Science and Chemical Engineering, Ningbo University, No. 818, Fenghua Street, Ningbo 315211, China
| | - Le-Han Gao
- School of Materials Science and Chemical Engineering, Ningbo University, No. 818, Fenghua Street, Ningbo 315211, China
| | - Wen-Hui Bao
- School of Materials Science and Chemical Engineering, Ningbo University, No. 818, Fenghua Street, Ningbo 315211, China
| | - Wen-Ting Wei
- School of Materials Science and Chemical Engineering, Ningbo University, No. 818, Fenghua Street, Ningbo 315211, China
| |
Collapse
|
19
|
Ding PG, Hu XS, Zhou F, Zhou J. Catalytic enantioselective synthesis of α-chiral azides. Org Chem Front 2018. [DOI: 10.1039/c8qo00138c] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The catalytic asymmetric synthesis of α-chiral azides is of current interest and three synthetic strategies have been developed. This review summarizes the recent progress in this research area, discusses the advantages and limitations of each strategy, and outlines synthetic opportunities for future research.
Collapse
Affiliation(s)
- Pei-Gang Ding
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- People's Republic of China
| | - Xiao-Si Hu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- People's Republic of China
| | - Feng Zhou
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- People's Republic of China
| | - Jian Zhou
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- People's Republic of China
| |
Collapse
|
20
|
Zhu N, Li Y, Bao H. Metal-free intermolecular aminochlorination of unactivated alkenes. Org Chem Front 2018. [DOI: 10.1039/c8qo00001h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
We report a metal-free method for the synthesis of vicinal chloroamines by intermolecular aminochlorination of unactivated alkenes.
Collapse
Affiliation(s)
- Nengbo Zhu
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology
- State Key Laboratory of Structural Chemistry
- Center for Excellence in Molecular Synthesis
- Fujian Institute of Research on the Structure of Matter
- University of Chinese Academy of Sciences
| | - Yajun Li
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology
- State Key Laboratory of Structural Chemistry
- Center for Excellence in Molecular Synthesis
- Fujian Institute of Research on the Structure of Matter
- University of Chinese Academy of Sciences
| | - Hongli Bao
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology
- State Key Laboratory of Structural Chemistry
- Center for Excellence in Molecular Synthesis
- Fujian Institute of Research on the Structure of Matter
- University of Chinese Academy of Sciences
| |
Collapse
|
21
|
Li WY, Wu CS, Wang Z, Luo Y. Fe-Catalyzed three-component carboazidation of alkenes with alkanes and trimethylsilyl azide. Chem Commun (Camb) 2018; 54:11013-11016. [DOI: 10.1039/c8cc05090b] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Iron out the difference. Carboazidation of alkenes using cycloalkanes, CH2Cl2, CHCl3 and CCl4 as alkylating reagents proceeded smoothly in the presence of TMSN3, DTBP and a catalytic amount of Fe(acac)3 to afford chain extended alkyl azides and γ-azido chloroalkanes in good to high yields.
Collapse
Affiliation(s)
- Wei-Yu Li
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province
- College of Chemistry
- Xiangtan University
- Hunan
- P. R. China
| | - Chuan-Shuo Wu
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province
- College of Chemistry
- Xiangtan University
- Hunan
- P. R. China
| | - Zhou Wang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province
- College of Chemistry
- Xiangtan University
- Hunan
- P. R. China
| | - Yang Luo
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province
- College of Chemistry
- Xiangtan University
- Hunan
- P. R. China
| |
Collapse
|
22
|
Zhou P, Lin L, Chen L, Zhong X, Liu X, Feng X. Iron-Catalyzed Asymmetric Haloazidation of α,β-Unsaturated Ketones: Construction of Organic Azides with Two Vicinal Stereocenters. J Am Chem Soc 2017; 139:13414-13419. [PMID: 28862434 DOI: 10.1021/jacs.7b06029] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Organic azides play important roles in synthetic chemistry, chemical biology, drug discovery, and material science. Azido-functionalization of alkenes is one of the most efficient procedures for rapid introduction of azide group into organic compounds. But only a few examples have been documented in the catalytic asymmetric version of the azidation of alkenes. Herein, we report an unprecedented highly diastereo- and enantioselective bromoazidation of α,β-unsaturated ketones catalyzed by chiral N,N'-dioxide/Fe(OTf)2 complexes. An array of aryl, heteroaryl, and alkyl substituted α,β-unsaturated ketones were transformed to the corresponding α-bromo-β-azido ketones in high yields with excellent diastereo- and enantioselectivities. The catalytic system was also applicable for chloroazidation and iodoazidation of chalcone. Kinetic studies and some control experiments suggested that the reaction might proceed via a 1,4-addition/halogenation pathway.
Collapse
Affiliation(s)
- Pengfei Zhou
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University , Chengdu 610064, China
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University , Chengdu 610064, China
| | - Long Chen
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University , Chengdu 610064, China
| | - Xia Zhong
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University , Chengdu 610064, China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University , Chengdu 610064, China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University , Chengdu 610064, China.,Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
| |
Collapse
|
23
|
Bunescu A, Ha TM, Wang Q, Zhu J. Copper-Catalyzed Three-Component Carboazidation of Alkenes with Acetonitrile and Sodium Azide. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705353] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Ala Bunescu
- Laboratory of Synthesis and Natural Products; Institute of Chemical Sciences and Engineering; Ecole Polytechnique Federale de Lausanne; EPFL-SB-ISIC-LSPN, BCH 5304 1015 Lausanne Switzerland
| | - Tu M. Ha
- Laboratory of Synthesis and Natural Products; Institute of Chemical Sciences and Engineering; Ecole Polytechnique Federale de Lausanne; EPFL-SB-ISIC-LSPN, BCH 5304 1015 Lausanne Switzerland
| | - Qian Wang
- Laboratory of Synthesis and Natural Products; Institute of Chemical Sciences and Engineering; Ecole Polytechnique Federale de Lausanne; EPFL-SB-ISIC-LSPN, BCH 5304 1015 Lausanne Switzerland
| | - Jieping Zhu
- Laboratory of Synthesis and Natural Products; Institute of Chemical Sciences and Engineering; Ecole Polytechnique Federale de Lausanne; EPFL-SB-ISIC-LSPN, BCH 5304 1015 Lausanne Switzerland
| |
Collapse
|
24
|
Bunescu A, Ha TM, Wang Q, Zhu J. Copper-Catalyzed Three-Component Carboazidation of Alkenes with Acetonitrile and Sodium Azide. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/anie.201705353] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Ala Bunescu
- Laboratory of Synthesis and Natural Products; Institute of Chemical Sciences and Engineering; Ecole Polytechnique Federale de Lausanne; EPFL-SB-ISIC-LSPN, BCH 5304 1015 Lausanne Switzerland
| | - Tu M. Ha
- Laboratory of Synthesis and Natural Products; Institute of Chemical Sciences and Engineering; Ecole Polytechnique Federale de Lausanne; EPFL-SB-ISIC-LSPN, BCH 5304 1015 Lausanne Switzerland
| | - Qian Wang
- Laboratory of Synthesis and Natural Products; Institute of Chemical Sciences and Engineering; Ecole Polytechnique Federale de Lausanne; EPFL-SB-ISIC-LSPN, BCH 5304 1015 Lausanne Switzerland
| | - Jieping Zhu
- Laboratory of Synthesis and Natural Products; Institute of Chemical Sciences and Engineering; Ecole Polytechnique Federale de Lausanne; EPFL-SB-ISIC-LSPN, BCH 5304 1015 Lausanne Switzerland
| |
Collapse
|
25
|
Choi H, Shirley HJ, Hume PA, Brimble MA, Furkert DP. Unexpected Direct Synthesis ofN-Vinyl Amides through Vinyl Azide-Enolate [3+2] Cycloaddition. Angew Chem Int Ed Engl 2017; 56:7420-7424. [DOI: 10.1002/anie.201702727] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Indexed: 01/08/2023]
Affiliation(s)
- Hans Choi
- School of Chemical Sciences; University of Auckland; 23 Symonds St Auckland 1010 New Zealand
| | - Harry J. Shirley
- School of Chemical Sciences; University of Auckland; 23 Symonds St Auckland 1010 New Zealand
| | - Paul A. Hume
- School of Chemical Sciences; University of Auckland; 23 Symonds St Auckland 1010 New Zealand
| | - Margaret A. Brimble
- School of Chemical Sciences; University of Auckland; 23 Symonds St Auckland 1010 New Zealand
| | - Daniel P. Furkert
- School of Chemical Sciences; University of Auckland; 23 Symonds St Auckland 1010 New Zealand
| |
Collapse
|
26
|
Unexpected Direct Synthesis ofN-Vinyl Amides through Vinyl Azide-Enolate [3+2] Cycloaddition. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702727] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
27
|
Wang D, Wang F, Chen P, Lin Z, Liu G. Enantioselective Copper-Catalyzed Intermolecular Amino- and Azidocyanation of Alkenes in a Radical Process. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611850] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Dinghai Wang
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Fei Wang
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Pinghong Chen
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Zhenyang Lin
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay, Kowloon Hong Kong China
| | - Guosheng Liu
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| |
Collapse
|
28
|
Wang D, Wang F, Chen P, Lin Z, Liu G. Enantioselective Copper-Catalyzed Intermolecular Amino- and Azidocyanation of Alkenes in a Radical Process. Angew Chem Int Ed Engl 2017; 56:2054-2058. [DOI: 10.1002/anie.201611850] [Citation(s) in RCA: 143] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Indexed: 12/17/2022]
Affiliation(s)
- Dinghai Wang
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Fei Wang
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Pinghong Chen
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Zhenyang Lin
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay, Kowloon Hong Kong China
| | - Guosheng Liu
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| |
Collapse
|
29
|
Fu J, Zanoni G, Anderson EA, Bi X. α-Substituted vinyl azides: an emerging functionalized alkene. Chem Soc Rev 2017; 46:7208-7228. [DOI: 10.1039/c7cs00017k] [Citation(s) in RCA: 126] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Vinyl azides are highly versatile synthons that provide access to numerous N-heterocycles and other functional groups.
Collapse
Affiliation(s)
- Junkai Fu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis
- Northeast Normal University
- Changchun 130024
- China
| | - Giuseppe Zanoni
- Department of Chemistry
- University of Pavia
- 10-27100 Pavia
- Italy
| | | | - Xihe Bi
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis
- Northeast Normal University
- Changchun 130024
- China
| |
Collapse
|
30
|
Sun YM, Yu LZ, Zhu ZZ, Hu XB, Gao YN, Shi M. Electronic halocyclization and radical haloazidation of benzene-linked 1,7-dienes for the synthesis of functionalized 3,1-benzoxazines. Org Biomol Chem 2017; 15:634-639. [DOI: 10.1039/c6ob02566h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Electronic halocyclization and radical haloazidation of benzene-linked 1,7-dienes by using TMSN3 as an azidyl source and NBS as a halogen source has been disclosed in this paper, producing a series of functionalized 3,1-benzoxazines in moderate to good yields.
Collapse
Affiliation(s)
- Yuan-Ming Sun
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry and Molecule Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Liu-Zhu Yu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry and Molecule Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Zi-Zhong Zhu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry and Molecule Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Xu-Bo Hu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry and Molecule Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Yu-Ning Gao
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry and Molecule Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry and Molecule Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| |
Collapse
|
31
|
Soliman HA, Khatab TK, Abdel-Megeid FM. Utilization of bromine azide to access vicinal-azidobromides from arylidene malononitrile. CHINESE CHEM LETT 2016. [DOI: 10.1016/j.cclet.2016.03.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
32
|
Egami H, Yoneda T, Uku M, Ide T, Kawato Y, Hamashima Y. Difunctionalization of Alkenes Using 1-Chloro-1,2-benziodoxol-3-(1H)-one. J Org Chem 2016; 81:4020-30. [PMID: 27100051 DOI: 10.1021/acs.joc.6b00295] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Difunctionalization of alkenes with 1-chloro-1,2-benziodoxol-3-(1H)-one (1) was investigated. Various additional nucleophiles were tested, and oxychlorination, dichlorination, azidochlorination, chlorothiocyanation, and iodoesterfication were demonstrated. The oxychlorination product was obtained efficiently when the reaction was operated in water. Dichlorination occurred in the presence of a Lewis basic promoter, such as 4-phenylpyridine N-oxide, as an additive. The reaction with in situ-generated azido anion afforded azidochlorinated compounds with a chlorine atom at the terminal position, while the reaction with trimethylsilyl isothiocyanate produced chlorothiocyanation adducts with a chlorine atom at the benzylic position. On the other hand, when 1 was treated with tetra-n-butylammonium iodide prior to the addition of alkenes, only iodoesterification occurred selectively. These mild reactions enable convenient site-selective difunctionalizations of substrates having two alkene moieties. NMR experiments suggested that the electrophilic reactive species in each reaction varied depending on the nature of the added nucleophile.
Collapse
Affiliation(s)
- Hiromichi Egami
- School of Pharmaceutical Sciences, University of Shizuoka , 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Takahiro Yoneda
- School of Pharmaceutical Sciences, University of Shizuoka , 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Minako Uku
- School of Pharmaceutical Sciences, University of Shizuoka , 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Takafumi Ide
- School of Pharmaceutical Sciences, University of Shizuoka , 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Yuji Kawato
- School of Pharmaceutical Sciences, University of Shizuoka , 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Yoshitaka Hamashima
- School of Pharmaceutical Sciences, University of Shizuoka , 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| |
Collapse
|
33
|
Wu K, Liang Y, Jiao N. Azidation in the Difunctionalization of Olefins. Molecules 2016; 21:352. [PMID: 26999085 PMCID: PMC6274056 DOI: 10.3390/molecules21030352] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 02/12/2016] [Accepted: 03/09/2016] [Indexed: 02/06/2023] Open
Abstract
Organic azides are key motifs in compounds of relevance to chemical biology, medicinal chemistry and materials science. In addition, they also serve as useful building blocks due to their remarkable reactivity. Therefore, the development of efficient protocols to synthesize these compounds is of great significance. This paper reviews the major applications and development of azidation in difunctionalization of olefins using azide reagents.
Collapse
Affiliation(s)
- Kai Wu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing 100191, China.
| | - Yujie Liang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing 100191, China.
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing 100191, China.
| |
Collapse
|
34
|
Chen L, Xing H, Zhang H, Jiang ZX, Yang Z. Copper-catalyzed intermolecular chloroazidation of α,β-unsaturated amides. Org Biomol Chem 2016; 14:7463-7. [DOI: 10.1039/c6ob01352j] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A copper catalyzed three component chloroazidation of α,β-unsaturated amides has been performed using azidoiodine(iii) reagent and SOCl2 as azide and chlorine sources, respectively.
Collapse
Affiliation(s)
- Long Chen
- Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals and Wuhan University School of Pharmaceutical Sciences
- Wuhan 430071
- P. R. China
| | - Haotian Xing
- Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals and Wuhan University School of Pharmaceutical Sciences
- Wuhan 430071
- P. R. China
| | - Huaibin Zhang
- Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals and Wuhan University School of Pharmaceutical Sciences
- Wuhan 430071
- P. R. China
| | - Zhong-Xing Jiang
- Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals and Wuhan University School of Pharmaceutical Sciences
- Wuhan 430071
- P. R. China
| | - Zhigang Yang
- Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals and Wuhan University School of Pharmaceutical Sciences
- Wuhan 430071
- P. R. China
| |
Collapse
|
35
|
Kundoor G, Rao DS, Kashyap S. Regioselective Direct Difunctionalization of Glycals: Convenient Access to 2-Deoxyglycoconjugates Mediated by Tetra-n-butylammonium Iodide/Sodium Periodate. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500470] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Govindareddy Kundoor
- Discovery Laboratory, Organic and Biomolecular Chemistry Division; Indian Institute of Chemical Technology (CSIR), Tarnaka; Uppal Road Hyderabad- 500007 India
| | - Dodla Sivanageswara Rao
- Discovery Laboratory, Organic and Biomolecular Chemistry Division; Indian Institute of Chemical Technology (CSIR), Tarnaka; Uppal Road Hyderabad- 500007 India
| | - Sudhir Kashyap
- Discovery Laboratory, Organic and Biomolecular Chemistry Division; Indian Institute of Chemical Technology (CSIR), Tarnaka; Uppal Road Hyderabad- 500007 India
- Academy of Scientific and Innovative Research; Indian Institute of Chemical Technology (CSIR); Hyderabad- 500 007 India
| |
Collapse
|
36
|
Cantillo D, Gutmann B, Oliver Kappe C. Safe generation and use of bromine azide under continuous flow conditions--selective 1,2-bromoazidation of olefins. Org Biomol Chem 2015; 14:853-7. [PMID: 26648268 DOI: 10.1039/c5ob02425k] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bromine azide (BrN3), a useful but extremely toxic and explosive reagent for the preparation of vicinal 1,2-bromine azide compounds, was safely generated and reacted in situ with alkenes in a continuous flow photoreactor. BrN3 was generated by a novel procedure from NaBr and NaN3 in water, and efficiently extracted into an organic phase containing the alkene thus avoiding decomposition. The resulting addition products have been used for the preparation of several useful building blocks.
Collapse
Affiliation(s)
- David Cantillo
- Institute of Chemistry, University of Graz, NAWI Graz, Heinrichstrasse 28, A-8010 Graz, Austria.
| | | | | |
Collapse
|
37
|
Reddy TR, Rao DS, Babachary K, Kashyap S. Sulfonium Salts of Iodine(I) Species as Efficient Reagents for the Regioselective Bisfunctionalisation of Glycals and Enol Ethers. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501183] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|