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Tao JJ, Tang JD, Hong T, Ye JW, Chen JY, Xie C, Zhang Z, Li S. Crown Ether-Derived Chiral BINOL: Enantioselective Michael Addition of Alkenyl Boronic Acids to α,β-Unsaturated Ketones. ACS OMEGA 2021; 6:35093-35103. [PMID: 34963990 PMCID: PMC8697596 DOI: 10.1021/acsomega.1c05875] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 11/08/2021] [Indexed: 06/14/2023]
Abstract
A new class of aza-crown ether-derived chiral BINOL catalysts were designed, synthesized, and applied in the asymmetric Michael addition of alkenylboronic acids to α,β-unsaturated ketones. It was found that introducing aza-crown ethers to the BINOL catalyst could achieve apparently higher enantioselectivity than a similar BINOL catalyst without aza-crown ethers did, although the host-guest complexation of alkali ions by the aza-crown ethers could not further improve the catalysis effectiveness. Under mediation of the aza-crown ether-derived chiral BINOL and in the presence of a magnesium salt, an array of chiral γ,δ-unsaturated ketones were furnished in good enantioselectivities (81-95% ees).
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2
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Laina-Martín V, Pérez I, Fernández-Salas JA, Alemán J. Nucleophilic halo-Michael addition under Lewis-base activation. Chem Commun (Camb) 2019; 55:12936-12939. [PMID: 31599898 DOI: 10.1039/c9cc07068k] [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 simple and general conjugate nucleophilic halogenation is presented. The THTO/halosilane combination has shown the ability to act as a nucleophilic halide source in the conjugate addition to a variety of Michael acceptors. In addition, a straightforward diastereoselective halogen installation using α,β-unsaturated acyloxazolidinones as platforms has been developed.
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Affiliation(s)
- Víctor Laina-Martín
- Organic Chemistry Department, Módulo 1, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
| | - Ignacio Pérez
- Organic Chemistry Department, Módulo 1, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
| | - Jose A Fernández-Salas
- Organic Chemistry Department, Módulo 1, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
| | - José Alemán
- Organic Chemistry Department, Módulo 1, Universidad Autónoma de Madrid, 28049 Madrid, Spain. and Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
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3
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Nguyen TN, May JA. Enantioselective organocatalytic conjugate addition of organoboron nucleophiles. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.02.061] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4
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Palladium/N-heterocyclic carbene catalysed regio and diastereoselective reaction of ketones with allyl reagents via inner-sphere mechanism. Nat Commun 2016; 7:11806. [PMID: 27283477 PMCID: PMC4906412 DOI: 10.1038/ncomms11806] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 05/03/2016] [Indexed: 12/28/2022] Open
Abstract
The palladium-catalysed allylic substitution reaction is one of the most important reactions in transition-metal catalysis and has been well-studied in the past decades. Most of the reactions proceed through an outer-sphere mechanism, affording linear products when monosubstituted allyl reagents are used. Here, we report an efficient Palladium-catalysed protocol for reactions of β-substituted ketones with monosubstituted allyl substrates, simply by using N-heterocyclic carbene as ligand, leading to branched products with up to three contiguous stereocentres in a (syn, anti)-mode with excellent regio and diastereoselectivities. The scope of the protocol in organic synthesis has been examined preliminarily. Mechanistic studies by both experiments and density functional theory (DFT) calculations reveal that the reaction proceeds via an inner-sphere mechanism-nucleophilic attack of enolate oxygen on Palladium followed by C-C bond-forming [3,3']-reductive elimination.
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Chen W, Sun L, Huang X, Wang J, Peng Y, Song G. Ligand-Free Nickel-Catalysed 1,4-Addition of Arylboronic Acids to α,β-Unsaturated Carbonyl Compounds. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201400761] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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6
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Roscales S, Csákÿ AG. Transition-Metal-Free Direct anti-Carboboration of Alkynes with Boronic Acids To Produce Alkenylheteroarenes. Org Lett 2015; 17:1605-8. [PMID: 25738233 DOI: 10.1021/acs.orglett.5b00517] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Silvia Roscales
- Instituto Pluridisciplinar,
Universidad Complutense de Madrid, Campus de Excelencia Internactional Moncloa, Paseo de Juan XXIII, 1, 28040 Madrid, Spain
| | - Aurelio G. Csákÿ
- Instituto Pluridisciplinar,
Universidad Complutense de Madrid, Campus de Excelencia Internactional Moncloa, Paseo de Juan XXIII, 1, 28040 Madrid, Spain
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Roscales S, Sánchez F, Csákÿ AG. 1,2-Stereochemical Induction in the Pd II-Catalyzed Conjugate Addition of Boronic Acids. European J Org Chem 2015. [DOI: 10.1002/ejoc.201403488] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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8
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Sugiura M, Kinoshita R, Nakajima M. O-Monoacyltartaric acid catalyzed enantioselective conjugate addition of a boronic acid to dienones: application to the synthesis of optically active cyclopentenones. Org Lett 2014; 16:5172-5. [PMID: 25248134 DOI: 10.1021/ol502526y] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Enantioselective conjugate addition of styrylboronic acid to dienones was effectively catalyzed by an O-monoacyltartaric acid to afford monostyrylated products with good enantioselectivity. The RCM of the monostyrylated products using the Hoveyda-Grubbs II catalyst afforded optically active cyclopentenones, including a synthetic intermediate of the antitumor agent TEI-9826. The study shows that a diene additive such as 1,6-heptadiene or diallyl ether was essential for the RCM.
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Affiliation(s)
- Masaharu Sugiura
- Graduate School of Pharmaceutical Sciences, Kumamoto University , 5-1 Oe-honmachi, Chuo-ku, Kumamoto 862-0973, Japan
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Grimblat N, Sugiura M, Pellegrinet SC. A hydrogen bond rationale for the enantioselective β-alkenylboration of enones catalyzed by O-monoacyltartaric acids. J Org Chem 2014; 79:6754-8. [PMID: 25001404 DOI: 10.1021/jo5012398] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
DFT calculations suggest that O-monoacyl L-tartaric acids catalyze the asymmetric conjugate alkenylboration of enones through transition structures that are stabilized by hydrogen-bonding interactions. Formation of a five-membered acyloxyborane is proposed. The hydrogen of the free carboxy group derived from the catalyst interacts with the carbonyl group of the cyclic acyloxyborane, stabilizing the transition structure and reducing the flexibility of the system. Additional stabilizing nonclassical CH···O hydrogen-bond interactions seem to determine the observed enantioselectivity.
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Affiliation(s)
- Nicolás Grimblat
- Instituto de Química Rosario (CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario , Suipacha 531, Rosario 2000, Argentina
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Vallejos MM, Grimblat N, Pellegrinet SC. Diels–Alder reactions of pinacol alkenylboronates: an experimental and theoretical study. RSC Adv 2014. [DOI: 10.1039/c4ra07415g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We have studied the Diels–Alder reactions of pinacol alkenylboronates with cyclopentadiene under two different sets of conditions: thermal heating at 170 °C in a pressure tube and with catalytic TFA (5 mol%) at 80 °C.
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Affiliation(s)
- Margarita M. Vallejos
- Instituto de Química Rosario (CONICET)
- Facultad de Ciencias Bioquímicas y Farmacéuticas
- Universidad Nacional de Rosario
- Rosario 2000, Argentina
| | - Nicolás Grimblat
- Instituto de Química Rosario (CONICET)
- Facultad de Ciencias Bioquímicas y Farmacéuticas
- Universidad Nacional de Rosario
- Rosario 2000, Argentina
| | - Silvina C. Pellegrinet
- Instituto de Química Rosario (CONICET)
- Facultad de Ciencias Bioquímicas y Farmacéuticas
- Universidad Nacional de Rosario
- Rosario 2000, Argentina
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Roscales S, Csákÿ AG. Transition-metal-free C–C bond forming reactions of aryl, alkenyl and alkynylboronic acids and their derivatives. Chem Soc Rev 2014; 43:8215-25. [DOI: 10.1039/c4cs00195h] [Citation(s) in RCA: 154] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Transition-metal-free C–C bond forming reactions of boronic acids are new emerging tools in organic synthesis which complement metal-based procedures.
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Affiliation(s)
- S. Roscales
- Instituto Pluridisciplinar
- Universidad Complutense de Madrid
- Campus de Excelencia Internactional Moncloa
- 28040-Madrid, Spain
| | - A. G. Csákÿ
- Instituto Pluridisciplinar
- Universidad Complutense de Madrid
- Campus de Excelencia Internactional Moncloa
- 28040-Madrid, Spain
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12
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Roscales S, Csákÿ AG. Metal-free ring-opening of epoxides with potassium trifluoroborates. Chem Commun (Camb) 2014; 50:454-6. [DOI: 10.1039/c3cc47360k] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Lee ASY, Wang SH, Chang YT. Synthesis of β-Haloketones by β-Addition Reactions of α,β-Unsaturated Ketones with BX3(X = Br, Cl) as Halide Source. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201300394] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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14
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Roscales S, Ortega V, Csákÿ AG. Transition-Metal-Free Reactions of Boronic Acids: 1,3-Stereochemical Induction in the Substrate-Controlled Conjugate Addition. J Org Chem 2013; 78:12825-30. [DOI: 10.1021/jo402262m] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Silvia Roscales
- Instituto
Pluridisciplinar, Universidad Complutense, Campus de Excelencia Internacional Moncloa, 28040 Madrid, Spain
| | - Víctor Ortega
- Instituto
Pluridisciplinar, Universidad Complutense, Campus de Excelencia Internacional Moncloa, 28040 Madrid, Spain
| | - Aurelio G. Csákÿ
- Instituto
Pluridisciplinar, Universidad Complutense, Campus de Excelencia Internacional Moncloa, 28040 Madrid, Spain
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