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Unexpected Decarbonylation of Acylethynylpyrroles under the Action of Cyanomethyl Carbanion: A Robust Access to Ethynylpyrroles. Molecules 2023; 28:molecules28031389. [PMID: 36771055 PMCID: PMC9919934 DOI: 10.3390/molecules28031389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/25/2023] [Accepted: 01/26/2023] [Indexed: 02/04/2023] Open
Abstract
It has been found that the addition of CH2CN- anion to the carbonyl group of acylethynylpyrroles, generated from acetonitrile and t-BuOK, results in the formation of acetylenic alcohols, which undergo unexpectedly easy (room temperature) decomposition to ethynylpyrroles and cyanomethylphenylketones (retro-Favorsky reaction). This finding allows a robust synthesis of ethynylpyrroles in up to 95% yields to be developed. Since acylethynylpyrroles became available, the strategy thus found makes ethynylpyrroles more accessible than earlier. The quantum-chemical calculations (B2PLYP/6-311G**//B3LYP/6-311G**+C-PCM/acetonitrile) confirm the thermodynamic preference of the decomposition of the intermediate acetylenic alcohols to free ethynylpyrroles rather than their potassium derivatives.
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Shimizu M, Okuda Y, Toyoda K, Akiyama R, Shinozaki H, Yamamoto T. Pd-catalyzed synthesis of 1-(hetero)aryl-2,2,2-trichloroethanols using chloral hydrate and (hetero)arylboroxines. RSC Adv 2021; 11:17734-17739. [PMID: 35480199 PMCID: PMC9033206 DOI: 10.1039/d1ra02403e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 05/11/2021] [Indexed: 01/24/2023] Open
Abstract
1-(Hetero)aryl-2,2,2-trichloroethanols are useful key intermediates for the synthesis of various bioactive compounds. Herein, we describe N-heterocyclic carbene (NHC)-coordinated cyclometallated palladium complex (CYP)-catalyzed (hetero)aryl addition of chloral hydrate using (hetero)arylboroxines, providing a new approach to 1-(hetero)aryl-2,2,2-trichloroethanols. Notably, PhS-IPent-CYP which coordinated the bulky yet flexible 2,6-di(pentan-3-yl)aniline (IPent)-based NHC showed good catalytic activities and promoted the transformation in 24-97% yields.
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Affiliation(s)
- Minori Shimizu
- Department of Materials and Life Sciences, Tokyo Denki University 5 Senju-Asahicho Adachi Tokyo 120-8551 Japan
| | - Yuta Okuda
- Department of Materials Science and Engineering, Tokyo Denki University 5 Senju-Asahicho, Adachi-ku Tokyo 120-8551 Japan
| | - Koki Toyoda
- Department of Applied Chemistry, Tokyo Denki University 5 Senju-Asahicho, Adachi-ku Tokyo 120-8551 Japan
| | - Ryo Akiyama
- Department of Materials Science and Engineering, Tokyo Denki University 5 Senju-Asahicho, Adachi-ku Tokyo 120-8551 Japan
| | - Hiraku Shinozaki
- Department of Applied Chemistry, Tokyo Denki University 5 Senju-Asahicho, Adachi-ku Tokyo 120-8551 Japan
| | - Tetsuya Yamamoto
- Department of Materials and Life Sciences, Tokyo Denki University 5 Senju-Asahicho Adachi Tokyo 120-8551 Japan
- Department of Materials Science and Engineering, Tokyo Denki University 5 Senju-Asahicho, Adachi-ku Tokyo 120-8551 Japan
- Department of Applied Chemistry, Tokyo Denki University 5 Senju-Asahicho, Adachi-ku Tokyo 120-8551 Japan
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Ávila EP, de Souza IF, Oliveira AVB, Kartnaller V, Cajaiba J, de Souza ROMA, Corrêa CC, Amarante GW. Catalyst free decarboxylative trichloromethylation of aldimines. RSC Adv 2016. [DOI: 10.1039/c6ra23936f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A catalyst free decarboxylative trichloromethylation of imines to afford different trichloromethyl sulfonyl and sulfinyl amines has been presented.
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Affiliation(s)
- Eloah P. Ávila
- Departamento de Química
- Universidade Federal de Juiz de Fora
- Juiz de Fora
- Brazil
| | | | | | - Vinicius Kartnaller
- Instituto de Química
- Universidade Federal do Rio de Janeiro
- Rio de Janeiro
- Brazil
| | - João Cajaiba
- Instituto de Química
- Universidade Federal do Rio de Janeiro
- Rio de Janeiro
- Brazil
| | | | - Charlane C. Corrêa
- Departamento de Química
- Universidade Federal de Juiz de Fora
- Juiz de Fora
- Brazil
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Wahl B, Lee DS, Woodward S. 1,4-Addition of TMSCCl3to (E)-Fumaric Esters and Thermal Rearrangement of the Adducts to 3,4-Dichloropent-2-enedioates. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500730] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Zhang J, Wu W, Ji X, Cao S. Perfluorobutyl iodide-assisted direct cyanomethylation of azoles and phenols with acetonitrile. RSC Adv 2015. [DOI: 10.1039/c5ra02242h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A perfluorobutyl iodide-assisted transition-metal-free cyanomethylation of azoles and phenols with acetonitrile in the presence of NaH has been developed. A mechanism involving the cyanomethyl radical was proposed.
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Affiliation(s)
- Juan Zhang
- Shanghai Key Laboratory of Chemical Biology
- School of Pharmacy
- East China University of Science and Technology (ECUST)
- Shanghai 200237
- China
| | - Wei Wu
- Shanghai Key Laboratory of Chemical Biology
- School of Pharmacy
- East China University of Science and Technology (ECUST)
- Shanghai 200237
- China
| | - Xinfei Ji
- Shanghai Key Laboratory of Chemical Biology
- School of Pharmacy
- East China University of Science and Technology (ECUST)
- Shanghai 200237
- China
| | - Song Cao
- Shanghai Key Laboratory of Chemical Biology
- School of Pharmacy
- East China University of Science and Technology (ECUST)
- Shanghai 200237
- China
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Jensen AB, Lindhardt AT. Decarboxylative Trichloromethylation of Aromatic Aldehydes and Its Applications in Continuous Flow. J Org Chem 2014; 79:1174-83. [DOI: 10.1021/jo402595r] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andreas B. Jensen
- Department of Engineering, Aarhus University, Finlandsgade 22, 8200 Aarhus N, Denmark
| | - Anders T. Lindhardt
- Department of Engineering, Aarhus University, Finlandsgade 22, 8200 Aarhus N, Denmark
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Singh BS, Lobo HR, Shankarling GS. Choline chloride based eutectic solvents: Magical catalytic system for carbon–carbon bond formation in the rapid synthesis of β-hydroxy functionalized derivatives. CATAL COMMUN 2012. [DOI: 10.1016/j.catcom.2012.03.021] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Gupta MK, Li Z, Snowden TS. One-Pot Synthesis of Trichloromethyl Carbinols from Primary Alcohols. J Org Chem 2012; 77:4854-60. [DOI: 10.1021/jo300725v] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Manoj K. Gupta
- Department of Chemistry, The University of Alabama, P.O. Box 870336, Tuscaloosa, Alabama 35487-0336,
United States
| | - Zhexi Li
- Department of Chemistry, The University of Alabama, P.O. Box 870336, Tuscaloosa, Alabama 35487-0336,
United States
| | - Timothy S. Snowden
- Department of Chemistry, The University of Alabama, P.O. Box 870336, Tuscaloosa, Alabama 35487-0336,
United States
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Lee HS, Kim SH, Kim JN. Facile One-Pot Synthesis of Cinnamamides from Aromatic Aldehydes and Acetonitrile with Me 3SiOK. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.5.1748] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Poisson T, Gembus V, Oudeyer S, Marsais F, Levacher V. Product-Catalyzed Addition of Alkyl Nitriles to Unactivated Imines Promoted by Sodium Aryloxide/Ethyl(trimethylsilyl)acetate (ETSA) Combination. J Org Chem 2009; 74:3516-9. [DOI: 10.1021/jo802763b] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Thomas Poisson
- Chimie Organique, Bioorganique, Réactivité et Analyse (UMR6014), CNRS, Université et INSA de Rouen, IRCOF, BP08, F-76131Mont-Saint-Aignan Cedex, France
| | - Vincent Gembus
- Chimie Organique, Bioorganique, Réactivité et Analyse (UMR6014), CNRS, Université et INSA de Rouen, IRCOF, BP08, F-76131Mont-Saint-Aignan Cedex, France
| | - Sylvain Oudeyer
- Chimie Organique, Bioorganique, Réactivité et Analyse (UMR6014), CNRS, Université et INSA de Rouen, IRCOF, BP08, F-76131Mont-Saint-Aignan Cedex, France
| | - Francis Marsais
- Chimie Organique, Bioorganique, Réactivité et Analyse (UMR6014), CNRS, Université et INSA de Rouen, IRCOF, BP08, F-76131Mont-Saint-Aignan Cedex, France
| | - Vincent Levacher
- Chimie Organique, Bioorganique, Réactivité et Analyse (UMR6014), CNRS, Université et INSA de Rouen, IRCOF, BP08, F-76131Mont-Saint-Aignan Cedex, France
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Zakzeski J, Bell AT. Oxidative carbonylation of benzotrifluoride to form trifluoromethylbenzoic acid. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcata.2008.11.034] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Feroci M, Orsini M, Sotgiu G, Inesi A. The Knoevenagel reaction in electrochemically activated solvents. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2007.09.048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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