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1
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Wang Z, He Y, Wang F, Wang Y, Luo H, Wu J, Yang J. Green and efficient synthesis of dibenzyl cyanamides and ureas with cyanamide as a block. RSC Adv 2024; 14:23693-23698. [PMID: 39077314 PMCID: PMC11284761 DOI: 10.1039/d4ra04286g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2024] [Accepted: 07/16/2024] [Indexed: 07/31/2024] Open
Abstract
A method for the two-step synthesis of dibenzyl cyanamide and dibenzyl urea via cyanamide is presented. This approach is both efficient and environmentally friendly. Various N,N-dibenzyl ureas could be obtained by reactions of N,N-dibenzyl cyanamides and N,N-dibenzyl cyanamides as intermediates formed from cyanamide. In the absence of metal, ligand and hydrogen peroxide as the oxidant, products with moderate yields have been obtained under mild conditions. Key features include the use of widely available and easily handled cyanamide sources as starting materials.
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Affiliation(s)
- Zhongjie Wang
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University Yinchuan 750021 China
| | - Yu He
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University Yinchuan 750021 China
| | - Fang Wang
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University Yinchuan 750021 China
| | - Yan Wang
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University Yinchuan 750021 China
| | - Hui Luo
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University Yinchuan 750021 China
| | - Jianglong Wu
- School of Chemistry and Chemical Engineering, Ningxia Normal University Guyuan 756000 China
| | - Jinhui Yang
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University Yinchuan 750021 China
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2
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Sun Q, Bao X. Facile preparation of dihydro-1,4-benzothiazine derivatives via oxidative ring-expansion of 2-aminobenzothiazoles with olefins. Chem Commun (Camb) 2022; 58:2216-2219. [PMID: 35072669 DOI: 10.1039/d1cc06756g] [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
A concise and efficient approach to prepare dihydro-1,4-benzothiazine derivatives is described via oxidative ring-expansion of 2-aminobenzothiazoles with olefins under metal-free conditions. This protocol is applicable for a wide range of readily accessible 2-aminobenzothiazoles and olefins with moderate-to-good yields. The [4+2] heteroannulation between the intermediacy of oxidative ring-opening of 2-aminobenzothiazoles and olefins is suggested to rationalize the formation of the product.
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Affiliation(s)
- Qing Sun
- Innovation Center for Chemical Sciences, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123, China.
| | - Xiaoguang Bao
- Innovation Center for Chemical Sciences, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123, China.
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3
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Hang Z, Tong X, Li Z, Wang ZY, Xue W. A practical method for N-cyanation of secondary amines and sulfonamides. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2021.153564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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4
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Chen Z, Yuan W. N-Cyanation of Primary and Secondary Amines with Cyanobenzio-doxolone (CBX) Reagent. Chemistry 2021; 27:14836-14840. [PMID: 34390036 DOI: 10.1002/chem.202102354] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Indexed: 01/11/2023]
Abstract
An efficient electrophilic N-cyanation of amines with a stable and less-toxic cyanobenziodoxole reagent towards the synthesis of cyanamides is disclosed. This synthetically practicable strategy allows the construction of a wide variety of cyanamides under very mild and simple conditions with a broad functional group compatibility, and showcases a huge potential in late-stage modification of complex molecules.
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Affiliation(s)
- Zimin Chen
- Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica Hubei Key Laboratory of Materials Chemistry and Service Failure School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, 430074, P. R. China
| | - Weiming Yuan
- Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica Hubei Key Laboratory of Materials Chemistry and Service Failure School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, 430074, P. R. China
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5
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Kuhl N, Raval S, Cohen RD. Synthesis of Cyanamides via a One-Pot Oxidation–Cyanation of Primary and Secondary Amines. Org Lett 2019; 21:1268-1272. [DOI: 10.1021/acs.orglett.8b04007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Nadine Kuhl
- Department of Process Research & Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Saurin Raval
- Department of Process Research & Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Ryan D. Cohen
- Department of Process Research & Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
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6
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Recyclable C2-symmetric tertiary amine-squaramide organocatalysts: Design and application to asymmetric synthesis of γ-nitrocarbonyl compounds. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.07.043] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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7
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Ayres JN, Williams MTJ, Tizzard GJ, Coles SJ, Ling KB, Morrill LC. Synthesis and Reactivity of N-Allenyl Cyanamides. Org Lett 2018; 20:5282-5285. [DOI: 10.1021/acs.orglett.8b02225] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- James N. Ayres
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Matthew T. J. Williams
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Graham J. Tizzard
- UK National Crystallographic Service, Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Simon J. Coles
- UK National Crystallographic Service, Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Kenneth B. Ling
- Syngenta, Jealott’s Hill International Research Centre, Bracknell, Berkshire RG42 6EY, U.K
| | - Louis C. Morrill
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
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8
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Ayres JN, Ashford MW, Stöckl Y, Prudhomme V, Ling KB, Platts JA, Morrill LC. Deoxycyanamidation of Alcohols with N-Cyano-N-phenyl-p-methylbenzenesulfonamide (NCTS). Org Lett 2017; 19:3835-3838. [DOI: 10.1021/acs.orglett.7b01710] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- James N. Ayres
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, U.K
| | - Matthew W. Ashford
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, U.K
| | - Yannick Stöckl
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, U.K
| | - Vassili Prudhomme
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, U.K
| | - Kenneth B. Ling
- Syngenta,
Jealott’s
Hill International Research Centre, Bracknell, Berkshire RG42 6EY, U.K
| | - James A. Platts
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, U.K
| | - Louis C. Morrill
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, U.K
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9
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Recent Advances in Cyanamide Chemistry: Synthesis and Applications. Molecules 2017; 22:molecules22040615. [PMID: 28417938 PMCID: PMC6154562 DOI: 10.3390/molecules22040615] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 04/06/2017] [Accepted: 04/07/2017] [Indexed: 11/17/2022] Open
Abstract
The application of alkyl and aryl substituted cyanamides in synthetic chemistry has diversified multi-fold in recent years. In this review, we discuss recent advances (since 2012) in the chemistry of cyanamides and detail their application in cycloaddition chemistry, aminocyanation reactions, as well as electrophilic cyanide-transfer agents and their unique radical and coordination chemistry.
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