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Blay G, Monleón A, Montesinos-Magraner M, Sanz-Marco A, Vila C. Asymmetric electrophilic functionalization of amino-substituted heteroaromatic compounds: a convenient tool for the enantioselective synthesis of nitrogen heterocycles. Chem Commun (Camb) 2024; 60:12270-12286. [PMID: 39351928 DOI: 10.1039/d4cc03680h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2024]
Abstract
The catalytic asymmetric electrophilic functionalization of the less reactive N-heteroaromatic compounds has been reported using the approach of the introduction of an exocyclic amino substituent. This strategy has allowed enantioselective Friedel-Crafts alkylation in pyrazoles, isoxazoles and isothiazoles, as well as in aminoindoles, aminobenzofurans and aminobenzothiophenes. Several stereoselective methods have been used for the 1,4-addition or 1,2-addition of these heteroaromatic compounds to different electrophiles employing organocatalysts or chiral metal complexes. The activating exocyclic amino substituent has also been used as a nucleophile in tandem reactions, including formal cycloadditions ([3+2] and [3+3]), for the synthesis of highly functionalized chiral nitrogen heterocycles.
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Affiliation(s)
- Gonzalo Blay
- Departament de Química Orgànica, Facultat de Química, Universitat de València, Dr Moliner 50, 46100 Burjassot, València, Spain.
| | - Alicia Monleón
- Departament de Química Orgànica, Facultat de Química, Universitat de València, Dr Moliner 50, 46100 Burjassot, València, Spain.
| | - Marc Montesinos-Magraner
- Departament de Química Orgànica, Facultat de Química, Universitat de València, Dr Moliner 50, 46100 Burjassot, València, Spain.
| | - Amparo Sanz-Marco
- Departament de Química Orgànica, Facultat de Química, Universitat de València, Dr Moliner 50, 46100 Burjassot, València, Spain.
| | - Carlos Vila
- Departament de Química Orgànica, Facultat de Química, Universitat de València, Dr Moliner 50, 46100 Burjassot, València, Spain.
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Catalyst-free Direct Ring-opening of Cyclic Aldimines with Aliphatic Primary Amines to Construct o-Hydroxy Schiff Bases. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Chen L, Lv N, Zhen Q, Chen Z, Ge JY, Chen J. Nickel-catalyzed multicomponent reaction of dinitriles and hydrazine hydrochlorides with boronic acids: access to 1,3-diaryl-1H-pyrazol-5-amines and 4,5-dihydropyridazin-3(2H)-ones. Org Chem Front 2022. [DOI: 10.1039/d2qo00036a] [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
Developing efficient methods to accommodate azaheterocycles has been the hotspot field in organic synthesis. Herein, we disclose a facile and expeditious avenue to synthesize 1,3-diaryl-1H-pyrazol-5-amines and 4,5-dihydropyridazin-3(2H)-ones via nickel-catalyzed addition,...
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Tang X, Chen J, Tian J, Wen K, Gao Q, Shi J, Yao X, Wu T. A new method for C(sp2)-H sulfonylmethylation with glyoxylic acid and sodium sulfinates. Org Biomol Chem 2022; 20:1652-1655. [DOI: 10.1039/d2ob00029f] [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
We herein describe a C4 sulfonylmethylation of pyrazol-5-amines with glyoxylic acid and sodium sulfinates. The reaction only needed to add water as the solvent, and it featured mild reaction condition,...
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Woldegiorgis AG, Han Z, Lin X. Chiral Phosphoric Acid‐Catalyzed Enantioselective Synthesis of Pyrazole‐Based Unnatural α‐Amino Acid Derivatives. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101011] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Alemayehu Gashaw Woldegiorgis
- Center of Chemistry for Frontier Technologies, Department of Chemistry Zhejiang University Hangzhou 310027 People's Republic of China
| | - Zhao Han
- Center of Chemistry for Frontier Technologies, Department of Chemistry Zhejiang University Hangzhou 310027 People's Republic of China
| | - Xufeng Lin
- Center of Chemistry for Frontier Technologies, Department of Chemistry Zhejiang University Hangzhou 310027 People's Republic of China
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Carceller-Ferrer L, Vila C, Blay G, Muñoz MC, Pedro JR. Catalytic Diastereo- and Enantioselective Vinylogous Mannich Reaction of Alkylidenepyrazolones to Isatin-Derived Ketimines. Org Lett 2021; 23:7391-7395. [PMID: 34553948 PMCID: PMC8491163 DOI: 10.1021/acs.orglett.1c02571] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
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A valuable organocatalytic
vinylogous Mannich reaction between
alkylidenepyrazolones and isatin-derived ketimines has been successfully
established. Squaramide organocatalyst, prepared from quinine, catalyzed
the diastereo- and enantioselective vinylogous Mannich addition, affording
a range of aminooxindole-pyrazolone adducts (24 examples) with excellent
outcomes: up to 98% yield with complete diastereoselectivity and excellent
enantioselectivity (up to 99% ee). Additionally, different synthetic
transformations were performed with the chiral pyrazolone-oxindole
adducts.
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Affiliation(s)
- Laura Carceller-Ferrer
- Departament de Química Orgànica, Facultat de Química, Universitat de València, Dr. Moliner 50, 46100 Burjassot, València, Spain
| | - Carlos Vila
- Departament de Química Orgànica, Facultat de Química, Universitat de València, Dr. Moliner 50, 46100 Burjassot, València, Spain
| | - Gonzalo Blay
- Departament de Química Orgànica, Facultat de Química, Universitat de València, Dr. Moliner 50, 46100 Burjassot, València, Spain
| | - M Carmen Muñoz
- Departament de Física Aplicada, Universitat Politècnica de València, Camino de Vera s/n, 46022 València, Spain
| | - José R Pedro
- Departament de Química Orgànica, Facultat de Química, Universitat de València, Dr. Moliner 50, 46100 Burjassot, València, Spain
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Liu H, Yan Y, Li M, Zhang X. An enantioselective aza-Friedel-Crafts reaction of 5-aminoisoxazoles with isatin-derived N-Boc ketimines. Org Biomol Chem 2021; 19:3820-3824. [PMID: 33949582 DOI: 10.1039/d1ob00374g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
By employing a chiral phosphoric acid as a catalyst, an enantioselective aza-Friedel-Crafts reaction of 5-aminoisoxazoles with isatin-derived N-Boc ketimines was realized. The reaction provided a wide variety of novel 3-isoxazole 3-amino-oxindoles with good yields (up to 99%) and moderate to good enantioselectivities (up to 99%). The absolute configuration of one product was assigned by X-ray crystal structural analysis and a plausible reaction mechanism was proposed. In addition, a scale-up reaction was performed successfully. Finally, one product was subjected to Suzuki-Miyaura coupling with phenylboronic acid to afford the product in a moderate yield without erosion of the enantioselectivity.
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Affiliation(s)
- Hui Liu
- Asymmetric Synthesis and Chiraltechnology Key Laboratory of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, China. and Department of Chemistry, Xihua University, China and Graduate School of Chinese Academy of Sciences, Beijing, China
| | - Yingkun Yan
- Asymmetric Synthesis and Chiraltechnology Key Laboratory of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, China. and Department of Chemistry, Xihua University, China and Graduate School of Chinese Academy of Sciences, Beijing, China
| | - Min Li
- Asymmetric Synthesis and Chiraltechnology Key Laboratory of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, China. and Department of Chemistry, Xihua University, China and Graduate School of Chinese Academy of Sciences, Beijing, China
| | - Xiaomei Zhang
- Asymmetric Synthesis and Chiraltechnology Key Laboratory of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, China. and Department of Chemistry, Xihua University, China
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