1
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Motornov V, Beier P. NH-1,2,3-triazoles as versatile building blocks in denitrogenative transformations. RSC Adv 2023; 13:34646-34651. [PMID: 38024996 PMCID: PMC10680141 DOI: 10.1039/d3ra06045d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 11/22/2023] [Indexed: 12/01/2023] Open
Abstract
The utilization of NH-1,2,3-triazoles as easily accessible building blocks in denitrogenative ring cleavage transformations with electrophiles to provide multifunctionalized nitrogen heterocycles and N-alkenyl compounds is reviewed. Leveraging the ready availability of NH-1,2,3-triazoles, these processes provide a convenient route to a range of pharmaceutically relevant heterocyclic cores and N-alkenyl compounds. The synthetic usefulness of in situ acylated NH-1,2,3-triazoles as viable alternatives to widely explored N-sulfonyl-1,2,3-triazoles in ring cleavage processes is highlighted.
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Affiliation(s)
- Vladimir Motornov
- Institute of Orgranic Chemistry and Biochemistry, Academy of Sciences Flemingovo nám. 2 160 00 Prague 6 Czech Republic
| | - Petr Beier
- Institute of Orgranic Chemistry and Biochemistry, Academy of Sciences Flemingovo nám. 2 160 00 Prague 6 Czech Republic
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2
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Brzyska A, Majewski S, Ponikiewski Ł, Zubik-Duda M, Lipke A, Gładysz-Płaska A, Sowa S. Benzophosphol-3-yl Triflates as Precursors of 1,3-Diarylbenzophosphole Oxides. J Org Chem 2023. [PMID: 37276533 DOI: 10.1021/acs.joc.2c02355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A simple method for the synthesis of 3-arylbenzophosphole oxides under Suzuki-Miyaura coupling conditions has been presented. It employs benzophosphol-3-yl triflate starting materials which, prior to our work, had not been used for the synthesis of 3-arylbenzophosphole oxides. The reactions proceed over 24 h and provide a library of 3-arylbenzophosphole oxides. The synthetic access to the benzophosphol-3-yl triflates has been improved. The preliminary photophysical properties of some 3-arylbenzophosphole oxides have been investigated by absorption and emission measurements. The theoretical calculations were performed to establish structure-property relationships.
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Affiliation(s)
- Agnieszka Brzyska
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, 8 Niezapominajek St., Krakow PL-30-239, Poland
| | - Sebastian Majewski
- Department of Organic Chemistry and Crystallochemistry, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Sklodowska University in Lublin, 33 Gliniana St., Lublin PL-20-614, Poland
| | - Łukasz Ponikiewski
- Department of Inorganic Chemistry, Faculty of Chemistry, Gdańsk University of Technology, 11/12 G. Narutowicza St., Gdańsk PL-80-233, Poland
| | - Monika Zubik-Duda
- Department of Biophysics, Institute of Physics, Maria Curie-Sklodowska University in Lublin, PL-20-031 Lublin, Poland
| | - Agnieszka Lipke
- Institute of Chemical Sciences, Maria Curie-Sklodowska University in Lublin, 2/9 M. Curie-Sklodowska sq., Lublin PL-20-031, Poland
| | - Agnieszka Gładysz-Płaska
- Department of Inorganic Chemistry, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Sklodowska University in Lublin, 2/13-15A M. Curie-Sklodowska sq., Lublin PL-20-031, Poland
| | - Sylwia Sowa
- Department of Organic Chemistry and Crystallochemistry, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Sklodowska University in Lublin, 33 Gliniana St., Lublin PL-20-614, Poland
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3
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Motornov V, Beier P. Synthesis of N-vinyl isothiocyanates and carbamates by the cleavage of NH-1,2,3-triazoles with one-carbon electrophiles. Org Biomol Chem 2023; 21:1143-1147. [PMID: 36647812 DOI: 10.1039/d2ob02115c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Metal-free cascade reaction of NH-1,2,3-triazoles with one-carbon electrophiles, such as thiophosgene and triphosgene, led to N-vinylated ring cleavage products. Using this approach the synthesis of N-vinylisothiocyanates from NH-triazoles and thiophosgene was achieved. A variety of multifunctional compounds, such as N-vinylcarbamates, unsymmetrical vinylureas, carbamothioates, etc. was prepared by a one-pot method from NH-triazoles, triphosgene and nucleophiles.
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Affiliation(s)
- Vladimir Motornov
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague, Czech Republic.
| | - Petr Beier
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague, Czech Republic.
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4
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Ma J, Zou Q, Wang C, Yin G, Li F. Development of β,β-Dibrominated Secondary Enamides and Their Application to the Synthesis of 5-Br Oxazoles. J Org Chem 2022; 87:15670-15678. [PMID: 36315618 DOI: 10.1021/acs.joc.2c01927] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Herein, we report a base promoted dibromination of enamides using CBr4 as a bromine source to provide expedient access to β,β-dibrominated secondary enamides. Preliminary synthetic application study shows that these novel products can be readily transformed to 5-Br oxazoles via Cu(I) catalyzed intramolecular cyclization in good yields.
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Affiliation(s)
- Jun Ma
- College of Pharmaceutical Engineering of Traditional Chinese Medicine, State Key Laboratory of Component-Based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, P. R. China.,Haihe Laboratory of Modern Chinese Medicine, Tianjin 301617, P. R. China
| | - Qijie Zou
- College of Pharmaceutical Engineering of Traditional Chinese Medicine, State Key Laboratory of Component-Based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, P. R. China.,Haihe Laboratory of Modern Chinese Medicine, Tianjin 301617, P. R. China
| | - Chunhua Wang
- School of Medicine, Foshan University, Foshan 528225, P. R. China
| | - Guangwei Yin
- College of Pharmaceutical Engineering of Traditional Chinese Medicine, State Key Laboratory of Component-Based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, P. R. China.,Haihe Laboratory of Modern Chinese Medicine, Tianjin 301617, P. R. China
| | - Fangyi Li
- College of Pharmaceutical Engineering of Traditional Chinese Medicine, State Key Laboratory of Component-Based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, P. R. China.,Haihe Laboratory of Modern Chinese Medicine, Tianjin 301617, P. R. China
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5
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Silver-Catalyzed Cascade Cyclization of Amino-NH-1,2,3-Triazoles with 2-Alkynylbenzaldehydes: An Access to Pentacyclic Fused Triazoles. Molecules 2022; 27:molecules27217567. [PMID: 36364393 PMCID: PMC9655256 DOI: 10.3390/molecules27217567] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 10/25/2022] [Accepted: 10/26/2022] [Indexed: 11/06/2022] Open
Abstract
An operationally simple Ag(I)-catalyzed approach for the synthesis of isoquinoline and quinazoline fused 1,2,3-triazoles was developed by a condensation and amination cyclization cascade of amino-NH-1,2,3-triazoles with 2-alkynylbenzaldehydes involving three new C-N bond formations in one manipulation, in which the group of -NH of the triazole ring serves as a nucleophile to form the quinazoline skeleton. The efficient protocol can be applied to a variety of substrates containing a range of functional groups, delivering novel pentacyclic fused 1,2,3-triazoles in good-to-excellent yields.
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6
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Feng Z, Jiao H, Ye Z, Ye J, Xu ZF, Duan S, Li CY. Synthesis of Azepane Derivatives via Formal 1,3-Migration of Hydroxy and Acyloxy Groups and Selective Annulation. Org Lett 2022; 24:5254-5259. [PMID: 35852457 DOI: 10.1021/acs.orglett.2c01646] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Formal 1,3-migration of hydroxy and acyloxy groups initiated by α-imino rhodium carbene was achieved, and the following selective annulations of the corresponding zwitterions could efficiently afford azepane derivatives. Benefiting from a time-saving procedure as well as a good functional group tolerance, this unique migration-annulation protocol could provide an efficient tool for synthesizing seven-membered N-heterocycles. The plausible mechanism is discussed.
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Affiliation(s)
- Zijuan Feng
- Department of Chemistry, Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Xiasha West Higher Education District, Hangzhou, Zhejiang 310018, China
| | - Hongjian Jiao
- Department of Chemistry, Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Xiasha West Higher Education District, Hangzhou, Zhejiang 310018, China
| | - Zihang Ye
- Department of Chemistry, Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Xiasha West Higher Education District, Hangzhou, Zhejiang 310018, China
| | - Jie Ye
- Department of Chemistry, Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Xiasha West Higher Education District, Hangzhou, Zhejiang 310018, China
| | - Ze-Feng Xu
- Department of Chemistry, Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Xiasha West Higher Education District, Hangzhou, Zhejiang 310018, China
| | - Shengguo Duan
- Department of Chemistry, Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Xiasha West Higher Education District, Hangzhou, Zhejiang 310018, China
| | - Chuan-Ying Li
- Department of Chemistry, Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Xiasha West Higher Education District, Hangzhou, Zhejiang 310018, China
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7
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Synthesis of α-Amino Cyclobutanones via Formal 1,3-Hydroxy Migration Triggered by Formation of α-Imino Rhodium Carbene. Org Lett 2022; 24:2950-2954. [PMID: 35416678 DOI: 10.1021/acs.orglett.2c01029] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Formal intramolecular 1,3-OH migration of α-imino carbene was achieved producing a unique zwitterion, and the subsequent selective annulation afforded α-amino cyclobutanone. Features such as readily available substrates, mild reaction conditions, a time-saving procedure, excellent functional group compatibility, and valuable transformations of the products qualified this unique protocol as an efficient tool for the synthesis of strained cyclic compounds. Density functional theory calculations were in good agreement with experimental observations, and a plausible mechanism is presented.
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8
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Motornov V, Beier P. Access to Fluoroalkylated Azoles and 2-Acylaminoketones via Fluorinated Anhydride-Mediated Cleavage of NH-1,2,3-Triazoles. Org Lett 2022; 24:1958-1963. [DOI: 10.1021/acs.orglett.2c00359] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vladimir Motornov
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 160 00 Prague 6, Czech Republic
| | - Petr Beier
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 160 00 Prague 6, Czech Republic
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9
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Hill HM, Tucker ZD, Rodriguez KX, Wendt KA, Ashfeld BL. Generation of Functionalized Azepinone Derivatives via a (4 + 3)-Cycloaddition of Vinyl Ketenes and α-Imino Carbenes Derived from N-Sulfonyl-triazoles. J Org Chem 2022; 87:3825-3833. [PMID: 35188763 DOI: 10.1021/acs.joc.1c03002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An intermolecular RhII-catalyzed, formal (4 + 3)-cycloaddition between vinyl ketenes and N-sulfonyl-1,2,3-triazoles for the construction of azepinone products is described. Employing vinyl ketenes as a 1,4-dipolar surrogate, instead of the more commonly used dienyl moieties, allows for the intermolecular and selective formation of azepinone products over a potential (3 + 2)-cycloadduct under mild reaction conditions allows for the generation of azepinone products in up to 98% yield.
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Affiliation(s)
- Harrison M Hill
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Zachary D Tucker
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Kevin X Rodriguez
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Katelyn A Wendt
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Brandon L Ashfeld
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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10
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Motornov V, Beier P. One-pot synthesis of 4-substituted 2-fluoroalkyloxazoles from NH-1,2,3-triazoles and fluoroalkylated acid anhydrides. NEW J CHEM 2022. [DOI: 10.1039/d2nj02461f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient one-pot method for the synthesis of 2-fluoroalkyloxazoles from 4-substituted NH-1,2,3-triazoles, fluorinated anhydrides and triethylamine was developed.
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Affiliation(s)
- Vladimir Motornov
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10, Praha, Czech Republic
| | - Petr Beier
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10, Praha, Czech Republic
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11
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Xu H, Kong X, Cen M, Xu ZF, Duan S, Li CY. Synthesis of dihydropyrroles from in situ-generated zwitterions via Rh 2(adc) 4/TBAI dual catalysis. Chem Commun (Camb) 2022; 58:12244-12247. [DOI: 10.1039/d2cc04674a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A convenient rhodium/iodide dual catalysis strategy for the regioselective synthesis of dihydropyrroles was established.
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Affiliation(s)
- Huaping Xu
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Xiasha West Higher Education District, Hangzhou, 310018, China
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, Xiasha West Higher Education District, Hangzhou, 310018, China
| | - Xiaoyu Kong
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Xiasha West Higher Education District, Hangzhou, 310018, China
| | - Mengjie Cen
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Xiasha West Higher Education District, Hangzhou, 310018, China
| | - Ze-Feng Xu
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Xiasha West Higher Education District, Hangzhou, 310018, China
| | - Shengguo Duan
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Xiasha West Higher Education District, Hangzhou, 310018, China
| | - Chuan-Ying Li
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Xiasha West Higher Education District, Hangzhou, 310018, China
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12
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Xu M, Liu L, Wang T, Luo H, Hou M, Du L, Xin X, Lu Q, Li B. Acid-catalyzed ring-expansion of 4-(1-hydroxycyclobutyl)-1,2,3-triazoles. Org Chem Front 2022. [DOI: 10.1039/d1qo01747k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A direct ring-opening/semipinacol rearrangement reaction catalyzed by the Brønsted acid of 4-(1-hydroxycyclobutyl)-1,2,3-triazole is reported, in which the usage of metal catalysts and the reservation of sulfonyl groups are avoided.
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Affiliation(s)
- Mingchuan Xu
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, P. R. China
| | - Lei Liu
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, P. R. China
| | - Tao Wang
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, P. R. China
| | - Han Luo
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, P. R. China
| | - Meili Hou
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, P. R. China
| | - Luan Du
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, P. R. China
| | - Xiaolan Xin
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, P. R. China
| | - Qixing Lu
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, P. R. China
| | - Baosheng Li
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, P. R. China
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13
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Chvojka T, Markos A, Voltrová S, Pohl R, Beier P. Ligand-dependent stereoselective Suzuki-Miyaura cross-coupling reactions of β-enamido triflates. Beilstein J Org Chem 2021; 17:2657-2662. [PMID: 34795803 PMCID: PMC8561141 DOI: 10.3762/bjoc.17.179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 10/22/2021] [Indexed: 11/23/2022] Open
Abstract
The stereoselective Suzuki–Miyaura cross-coupling of (Z)-β-enamido triflates is demonstrated. Depending on the nature of the ligand in the palladium catalyst, either retention or inversion of the configuration during the synthesis of β,β-diaryl-substituted enamides is observed. Thus, the method provides synthetic access to both isomers of the target enamides from (Z)-β-enamido triflates.
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Affiliation(s)
- Tomáš Chvojka
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague, Czech Republic
| | - Athanasios Markos
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague, Czech Republic.,Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, CZ-128 43 Prague 2, Czech Republic
| | - Svatava Voltrová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague, Czech Republic
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague, Czech Republic
| | - Petr Beier
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague, Czech Republic
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14
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Luo H, Li Y, Du L, Xin X, Wang T, Han J, Tian Y, Li B. Divergent Synthesis of Highly Substituted Pyridines and Benzenes from Dienals, Alkynes, and Sulfonyl Azides. Org Lett 2021; 23:7883-7887. [PMID: 34590870 DOI: 10.1021/acs.orglett.1c02900] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Divergent synthesis is extremely important for the highly efficient preparation of structurally diverse target molecules. Herein, we describe a multicomponent cascade reaction, which allows access to highly substituted pyridines and benzenes by combining four individual steps in a one-pot manner from the same set of readily available starting materials. The azepine intermediates were first used as the precursors for 6π-electrocyclization to construct highly substituted pyridines and benzenes in a tunable manner.
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Affiliation(s)
- Han Luo
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, China
| | - You Li
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, China
| | - Luan Du
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, China
| | - Xiaolan Xin
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, China
| | - Tao Wang
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, China
| | - Jingpeng Han
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, China
| | - Yi Tian
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, China
| | - Baosheng Li
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, China
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15
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Kumar R, Ginoya V, Semwal R, Adimurthy S. BF 3·Et 2O catalyzed transannulation of pyridotriazoles with isothiocyanates: synthesis of thiazolo[3,4- a]pyridin-3-imines. NEW J CHEM 2021. [DOI: 10.1039/d1nj04033b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of thiazolo[3,4-a]pyridin-3-imines, through denitrogenative transannulation of pyridotriazoles, under transition metal-free conditions is described.
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Affiliation(s)
- Rahul Kumar
- Academy of Scientific & Innovative Research Ghaziabad, CSIR–Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364 002, Gujarat, India
| | - Vaibhavkumar Ginoya
- Academy of Scientific & Innovative Research Ghaziabad, CSIR–Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364 002, Gujarat, India
| | - Rashmi Semwal
- Academy of Scientific & Innovative Research Ghaziabad, CSIR–Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364 002, Gujarat, India
| | - Subbarayappa Adimurthy
- Academy of Scientific & Innovative Research Ghaziabad, CSIR–Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364 002, Gujarat, India
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