1
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Wu H, Luo T, Wan JP, Jiang J, Liu Y. Nickel‐Catalyzed Tandem Ring Contraction of TEMPO and C‐N Bond Transamination of Enaminones toward Amino Diversity of Enaminones. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Haozhi Wu
- Jiangxi Normal University College of Chemistry and Chemical Engineering CHINA
| | - Tian Luo
- Jiangxi Normal University College of Chemistry and Chemical Engineering CHINA
| | - Jie-Ping Wan
- Jiangxi Normal University College of Chemistry and Chemical Engineering CHINA
| | - Jianwen Jiang
- Jiangxi Normal University College of Chemistry and Chemical Engineering CHINA
| | - Yunyun Liu
- Jiangxi Normal University College of Chemistry and Chemical Engineering 99 Ziyang Road 330022 Nanchang CHINA
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2
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Liu T, Wei L, Zhao B, Liu Y, Wan JP. Copper-Catalyzed Enaminone C(sp 2)-N Bond Phosphonation for Stereoselective Synthesis of Alkenylphosphonates. J Org Chem 2021; 86:9861-9868. [PMID: 34189914 DOI: 10.1021/acs.joc.1c00862] [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
A direct enaminone C-N bond coupling functionalization that generates a new C-P bond using dialkyl phosphonate for the efficient and stereoselective synthesis of (E)-alkenylphosphonates is reported. The reactions toward target products proceed well with a broad scope, disclosing a valuable new synthetic application of enaminones by the interesting C(sp2)-N bond elaboration.
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Affiliation(s)
- Ting Liu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People's Republic of China
| | - Li Wei
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People's Republic of China
| | - Baoli Zhao
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People's Republic of China.,Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, People's Republic of China
| | - Yunyun Liu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People's Republic of China
| | - Jie-Ping Wan
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People's Republic of China
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3
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Amaye IJ, Haywood RD, Mandzo EM, Wirick JJ, Jackson-Ayotunde PL. Enaminones as building blocks in drug development: Recent advances in their chemistry, synthesis, and biological properties. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.131984] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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4
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Lu X, Xiao X, Zhang M, Wan C, Hou H, Wan J. Highly Selective Synthesis of 2-Substituted Pyrido[2,3- b]indole Derivatives Catalyzed by Iron Salts. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202107028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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5
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Gan L, Yu Q, Liu Y, Wan JP. Scissoring Enaminone C═C Double Bond by Free Radical Process for the Synthesis of α-Trifluoromethyl Ketones with CF 3SO 2Na. J Org Chem 2020; 86:1231-1237. [PMID: 33289380 DOI: 10.1021/acs.joc.0c02431] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The C═C double bond cleavage on tertiary enaminones, enabling the formation of a new C-CF3 bond, has been realized as a practical method for the synthesis of α-trifluoromethyl ketones with only the promotion of TBHP and ambient heating. Control experiments support that the reactions proceed via a featured free radical process. The deuterium labeling experiment employing D2O indicates that water participated in the product formation by donating the hydrogen atom for the newly generated α-C-H bond in the product.
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Affiliation(s)
- Lu Gan
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P.R. China.,School of Science, Nanchang Institute of Technology, Nanchang 330029, P.R. China
| | - Qing Yu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P.R. China
| | - Yunyun Liu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P.R. China
| | - Jie-Ping Wan
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P.R. China
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6
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Pariyar GC, Kundu T, Mitra B, Mukherjee S, Ghosh P. Ethyl lactate: An Efficient Green Mediator for Transition Metal Free Synthesis of Symmetric and Unsymmetric Azobenzenes. ChemistrySelect 2020. [DOI: 10.1002/slct.202002629] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Gyan Chandra Pariyar
- Department of Food TechnologyUniversity of North Bengal Dist. Darjeeling West Bengal India
| | - Tandra Kundu
- Department of ChemistryUniversity of North Bengal Dist. Darjeeling West Bengal India 2776381
| | - Bijeta Mitra
- Department of ChemistryUniversity of North Bengal Dist. Darjeeling West Bengal India 2776381
| | - Suvodip Mukherjee
- Department of ChemistryUniversity of North Bengal Dist. Darjeeling West Bengal India 2776381
| | - Pranab Ghosh
- Department of ChemistryUniversity of North Bengal Dist. Darjeeling West Bengal India 2776381
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7
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R S R, Sugunan A, S R, Suresh CH, Rajendar G. A Method for the Preparation of β-Amino-α,β-unsaturated Carbonyl Compounds: Study of Solvent Effect and Mechanism. Org Lett 2020; 22:1040-1045. [PMID: 31990197 DOI: 10.1021/acs.orglett.9b04531] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient method for the preparation of β-amino-α,β-unsaturated carbonyl compounds is demonstrated. Bench-stable sodium 3-oxo-enolates were prepared from carbonyl compounds, and reacted with amines in the presence of an acid and a desiccant. DFT studies revealed contrasting mechanisms toward the reactivity of aliphatic amines in protic solvents and aromatic amines in aprotic solvents. While the former proceeds through the formation of an imine, the latter passes through the Michael addition-elimination mechanism.
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Affiliation(s)
- Reyno R S
- School of Chemistry , Indian Institute of Science Education and Research , Thiruvananthapuram , Kerala 695551 , India
| | - Akash Sugunan
- School of Chemistry , Indian Institute of Science Education and Research , Thiruvananthapuram , Kerala 695551 , India
| | - Ranganayakulu S
- School of Chemistry , Indian Institute of Science Education and Research , Thiruvananthapuram , Kerala 695551 , India
| | - Cherumuttathu H Suresh
- Chemicals Sciences and Technology Division , CSIR-NIIST , Thiruvananthapuram , Kerala 695564 , India
| | - Goreti Rajendar
- School of Chemistry , Indian Institute of Science Education and Research , Thiruvananthapuram , Kerala 695551 , India
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8
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Lin Y, Wan JP, Liu Y. Synthesis of 3-halochromones with simple KX halogen sources enabled by in situ halide oxidation. NEW J CHEM 2020. [DOI: 10.1039/d0nj00825g] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
An in situ oxidation strategy for generating molecular halogen has been developed for the synthesis of 3-halochromones by employing simple potassium halides as halogen sources.
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Affiliation(s)
- Yan Lin
- College of Chemistry and Chemical Engineering, Jiangxi Normal University
- Nanchang 330022
- P. R. China
| | - Jie-Ping Wan
- College of Chemistry and Chemical Engineering, Jiangxi Normal University
- Nanchang 330022
- P. R. China
| | - Yunyun Liu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University
- Nanchang 330022
- P. R. China
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9
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Yang Y, Zhong G, Fan J, Liu Y. Metal-Free C=C Double Bond Cleavage on Enaminones for the Synthesis of α-Ketoamides by Free-Radical Aerobic Oxygenation. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900660] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yiming Yang
- College of Chemistry and Chemical Engineering; Jiangxi Normal University; 330022 Nanchang P. R. China
| | - Guofeng Zhong
- College of Chemistry and Chemical Engineering; Jiangxi Normal University; 330022 Nanchang P. R. China
| | - Junfen Fan
- Department of Nephrology; First Affiliated Hospital of Zhejiang Chinese Medical University; 310006 Hangzhou P. R. China
| | - Yunyun Liu
- College of Chemistry and Chemical Engineering; Jiangxi Normal University; 330022 Nanchang P. R. China
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Pal A, Hussaini SR. Copper-Catalyzed Coupling of Thioamides and Donor/Acceptor-Substituted Carbenoids: Synthesis of Enamino Esters and Enaminones. ACS OMEGA 2019; 4:269-280. [PMID: 31459329 PMCID: PMC6648369 DOI: 10.1021/acsomega.8b02633] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 12/20/2018] [Indexed: 06/10/2023]
Abstract
The coupling of thioamides and donor/acceptor-substituted diazocarbonyl compounds is reported for the first time. The present report provides a mild, catalytic method that couples thioamides and donor/acceptor-substituted diazocarbonyl compounds to form enamino esters and enaminones. Unlike traditional methods for the synthesis of enamino esters and enaminones from thioamides, both N-alkyl thioamides and thiocarbamates are suitable substrates in this coupling reaction. Copper(I) bromide catalyzes the reaction and provides enamino esters and enaminones chemo- and diastereoselectively in less time than Rh2(OAc)4 or Ru(PPh3)3Cl2 catalysts.
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11
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Gao Y, Liu Y, Wan JP. Visible Light-Induced Thiocyanation of Enaminone C–H Bond to Access Polyfunctionalized Alkenes and Thiocyano Chromones. J Org Chem 2019; 84:2243-2251. [DOI: 10.1021/acs.joc.8b02981] [Citation(s) in RCA: 105] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Yong Gao
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P.R. China
| | - Yunyun Liu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P.R. China
| | - Jie-Ping Wan
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P.R. China
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12
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Gan L, Gao Y, Wei L, Wan JP. Synthesis of α-Keto Thioamides by Metal-Free C═C Bond Cleavage in Enaminones Using Elemental Sulfur. J Org Chem 2018; 84:1064-1069. [PMID: 30563332 DOI: 10.1021/acs.joc.8b02670] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
An unprecedented method for cleaving the C═C bond in N, N-disubstituted enaminones in the presence of elemental sulfur and N, N-dimethyl-4-aminopyridine is disclosed. Without using any metal catalyst or additive, the cascade functionalization of both C═C and C-H bonds takes place to enable the formation of new C═S and C-N bonds, thus providing a facile and practical method for the synthesis of N, N-disubstituted α-keto thioamides.
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Affiliation(s)
- Lu Gan
- College of Chemistry and Chemical Engineering , Jiangxi Normal University , Nanchang 330022 , P. R. China
| | - Yong Gao
- College of Chemistry and Chemical Engineering , Jiangxi Normal University , Nanchang 330022 , P. R. China
| | - Li Wei
- College of Chemistry and Chemical Engineering , Jiangxi Normal University , Nanchang 330022 , P. R. China
| | - Jie-Ping Wan
- College of Chemistry and Chemical Engineering , Jiangxi Normal University , Nanchang 330022 , P. R. China
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13
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Gao G, Chen MN, Mo LP, Zhang ZH. Catalyst free one-pot synthesis of α-aminophosphonates in aqueous ethyl lactate. PHOSPHORUS SULFUR 2018. [DOI: 10.1080/10426507.2018.1542395] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Ge Gao
- National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, China
| | - Meng-Nan Chen
- National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, China
| | - Li-Ping Mo
- National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, China
| | - Zhan-Hui Zhang
- National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, China
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