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Barron B, Edge C, Fenner S, Shrives H, Sollis S, Whiting M, Valette D. A Concise Enantioselective Synthesis of Fluorinated Pyrazolo-Piperidine GSK3901383A Enabled by an Organocatalytic Aza-Michael Addition. Org Lett 2024; 26:1533-1538. [PMID: 38363757 DOI: 10.1021/acs.orglett.3c03694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2024]
Abstract
A highly enantioselective organocatalytic aza-Michael addition of 4-nitro-pyrazole to ethyl (E)-2,2-difluoro-5-oxopent-3-enoate has been developed. This reaction enabled a concise, four-step, stereoselective synthesis of highly functionalized 3,3-difluoro-4-pyrazolo-piperidine GSK3901383A, a key intermediate for the synthesis of a leucine-rich repeat kinase 2 inhibitor API. Computational analysis provided insight into the steric requirements of the catalytic system, enabling rational selection of a highly selective catalyst.
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Affiliation(s)
- Benedict Barron
- Drug Substance Development, GSK, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Colin Edge
- Computational Chemistry, GSK, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Sabine Fenner
- Drug Substance Development, GSK, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Harry Shrives
- Medicinal Chemistry, GSK, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Steven Sollis
- Medicinal Chemistry, GSK, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Matthew Whiting
- Drug Substance Development, GSK, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Damien Valette
- Drug Substance Development, GSK, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
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2
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Escolano M, Gaviña D, Alzuet-Piña G, Díaz-Oltra S, Sánchez-Roselló M, Pozo CD. Recent Strategies in the Nucleophilic Dearomatization of Pyridines, Quinolines, and Isoquinolines. Chem Rev 2024; 124:1122-1246. [PMID: 38166390 PMCID: PMC10902862 DOI: 10.1021/acs.chemrev.3c00625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2024]
Abstract
Dearomatization reactions have become fundamental chemical transformations in organic synthesis since they allow for the generation of three-dimensional complexity from two-dimensional precursors, bridging arene feedstocks with alicyclic structures. When those processes are applied to pyridines, quinolines, and isoquinolines, partially or fully saturated nitrogen heterocycles are formed, which are among the most significant structural components of pharmaceuticals and natural products. The inherent challenge of those transformations lies in the low reactivity of heteroaromatic substrates, which makes the dearomatization process thermodynamically unfavorable. Usually, connecting the dearomatization event to the irreversible formation of a strong C-C, C-H, or C-heteroatom bond compensates the energy required to disrupt the aromaticity. This aromaticity breakup normally results in a 1,2- or 1,4-functionalization of the heterocycle. Moreover, the combination of these dearomatization processes with subsequent transformations in tandem or stepwise protocols allows for multiple heterocycle functionalizations, giving access to complex molecular skeletons. The aim of this review, which covers the period from 2016 to 2022, is to update the state of the art of nucleophilic dearomatizations of pyridines, quinolines, and isoquinolines, showing the extraordinary ability of the dearomative methodology in organic synthesis and indicating their limitations and future trends.
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Affiliation(s)
- Marcos Escolano
- Department of Organic Chemistry, Faculty of Pharmacy, University of Valencia, 46100 Burjassot, Valencia, Spain
| | - Daniel Gaviña
- Department of Organic Chemistry, Faculty of Pharmacy, University of Valencia, 46100 Burjassot, Valencia, Spain
| | - Gloria Alzuet-Piña
- Department of Inorganic Chemistry, Faculty of Pharmacy, University of Valencia, 46100 Burjassot, Valencia, Spain
| | - Santiago Díaz-Oltra
- Department of Organic Chemistry, Faculty of Pharmacy, University of Valencia, 46100 Burjassot, Valencia, Spain
| | - María Sánchez-Roselló
- Department of Organic Chemistry, Faculty of Pharmacy, University of Valencia, 46100 Burjassot, Valencia, Spain
| | - Carlos Del Pozo
- Department of Organic Chemistry, Faculty of Pharmacy, University of Valencia, 46100 Burjassot, Valencia, Spain
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3
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Organocatalysis: A Tool of Choice for the Enantioselective Nucleophilic Dearomatization of Electron-Deficient Six-Membered Ring Azaarenium Salts. Catalysts 2021. [DOI: 10.3390/catal11101249] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Nucleophilic dearomatization of azaarenium salts is a powerful strategy to access 3D scaffolds of interest from easily accessible planar aromatic azaarene compounds. Moreover, this approach yields complex dihydroazaarenes by allowing the functionalization of the scaffold simultaneously to the dearomatization step. On the other side, organocatalysis is nowadays recognized as one of the pillars of the asymmetric catalysis field of research and is well-known to afford a high level of enantioselectivity for a myriad of transformations thanks to well-organized transition states resulting from low-energy interactions (electrostatic and/or H-bonding interactions…). Consequently, in the last fifteen years, organocatalysis has met great success in nucleophilic dearomatization of azaarenium salts. This review summarizes the work achieved up to date in the field of organocatalyzed nucleophilic dearomatization of azaarenium salts (mainly pyridinium, quinolinium, quinolinium and acridinium salts). A classification by organocatalytic mode of activation will be disclosed by shedding light on their related advantages and drawbacks. The versatility of the dearomatization approach will also be demonstrated by discussing several chemical transformations of the resulting dihydroazaarenes towards the synthesis of structurally complex compounds.
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4
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Jiao M, Gao J, Fang X. Enantioselective Synthesis of 4-Cyanotetrahydroquinolines via Ni-Catalyzed Hydrocyanation of 1,2-Dihydroquinolines. Org Lett 2020; 22:8566-8571. [PMID: 33085493 DOI: 10.1021/acs.orglett.0c03171] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A Ni-catalyzed asymmetric hydrocyanation that enables the formation of 4-cyanotetrahydroquinolines in good yields with excellent enantioselectivities is presented herein. A variety of functional groups are well-tolerated, and a gram-scale reaction supports the synthetic potential of the transformation. Additionally, several crucial intermediates for pharmaceutically active agents, including a PGD2 receptor antagonist, are now accessible through asymmetric synthesis using this new protocol.
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Affiliation(s)
- Mingdong Jiao
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China
| | - Jihui Gao
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China
| | - Xianjie Fang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China
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5
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Experimental and Computational Studies Unraveling the Peculiarity of Enolizable Oxoesters in the Organocatalyzed Mannich-Type Addition to Cyclic N-Acyl Iminium Ions. Molecules 2020; 25:molecules25081903. [PMID: 32326095 PMCID: PMC7221655 DOI: 10.3390/molecules25081903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 04/15/2020] [Accepted: 04/17/2020] [Indexed: 11/17/2022] Open
Abstract
γ− and δ-Oxoesters are easily available starting materials that have been sparingly used in some organocatalyzed reactions proceeding with a high enantioselectivity. In our experimentation we found that the use of these compounds as the enolizable (nucleophilic) component in organocatalyzed Mannich-type reactions using in situ-generated cyclic N-acyl iminium ions gave low diastereoselectivity and low to moderate values of enantioselectivity. This significant drop of facial selectivity with respect to simple aliphatic aldehydes has been rationalized by means of density functional theory (DFT) calculations.
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6
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Xu-Xu QF, Zhang X, You SL. Enantioselective Synthesis of 4-Allyl Tetrahydroquinolines via Copper(I) Hydride-Catalyzed Hydroallylation of 1,2-Dihydroquinolines. Org Lett 2020; 22:1530-1534. [PMID: 32009411 DOI: 10.1021/acs.orglett.0c00113] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
CuCl/(R,R)-Ph-BPE-catalyzed asymmetric hydroallylation of 1,2-dihydroquinolines, prepared from readily available quinolines, was developed. The optically active tetrahydroquinolines (THQs) bearing an allylic functionality at position 4 were obtained in good yields and excellent enantioselectivity. The introduced allylic groups are amenable to diverse transformations, thus offering chances to rapidly expand the THQ libraries.
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Affiliation(s)
- Qing-Feng Xu-Xu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis , Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Lu , Shanghai 200032 , China
| | - Xiao Zhang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis , Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Lu , Shanghai 200032 , China
| | - Shu-Li You
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis , Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Lu , Shanghai 200032 , China
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7
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Hou KQ, Chen XP, Huang Y, Chan ASC, Luo HB, Xiong XF. Asymmetric Total Synthesis and Biological Evaluation of the Natural PDE4 Inhibitor Toddacoumalone. Org Lett 2020; 22:584-588. [DOI: 10.1021/acs.orglett.9b04355] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Ke-Qiang Hou
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Xue-Ping Chen
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Yiyou Huang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Albert S. C. Chan
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Hai-Bin Luo
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Xiao-Feng Xiong
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
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8
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Xu-Xu QF, Zhang X, You SL. Enantioselective Synthesis of 4-Aminotetrahydroquinolines via 1,2-Reductive Dearomatization of Quinolines and Copper(I) Hydride-Catalyzed Asymmetric Hydroamination. Org Lett 2019; 21:5357-5362. [PMID: 31247783 DOI: 10.1021/acs.orglett.9b02034] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A 1,2-reductive dearomatization of quinolines and copper(II) acetate monohydrate/( R, R)-Ph-BPE/P( p-tolyl)3-catalyzed enantioselective hydroamination sequence was developed, affording diverse 4-amino-1,2,3,4-tetrahydroquinolines with high levels of enantioselectivity in either a stepwise or one-pot fashion. Pleasingly, internal cis-cyclic alkenes, which are challenging substrates in copper hydride-catalyzed enantioselective hydroamination reactions, were transformed efficiently under mild conditions.
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Affiliation(s)
- Qing-Feng Xu-Xu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis , Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Lu , Shanghai 200032 , China
| | - Xiao Zhang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis , Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Lu , Shanghai 200032 , China
| | - Shu-Li You
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis , Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Lu , Shanghai 200032 , China.,Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300072 , China
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9
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Duong Q, Schifferer L, García Mancheño O. Nucleophile Screening in Anion‐Binding Reissert‐Type Reactions of Quinolines with Chiral Tetrakis(triazole) Catalysts. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900566] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Qui‐Nhi Duong
- Organic Chemistry Institute Münster University Corrensstr. 40 48149 Münster Germany
| | - Lukas Schifferer
- Organic Chemistry Institute Münster University Corrensstr. 40 48149 Münster Germany
| | - Olga García Mancheño
- Organic Chemistry Institute Münster University Corrensstr. 40 48149 Münster Germany
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10
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Advances in the Organocatalytic Asymmetric Mannich Reaction of Six‐Membered Unsaturated Heterocycles: Methodology and Application. ChemCatChem 2019. [DOI: 10.1002/cctc.201900379] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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11
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Muthukrishnan I, Sridharan V, Menéndez JC. Progress in the Chemistry of Tetrahydroquinolines. Chem Rev 2019; 119:5057-5191. [PMID: 30963764 DOI: 10.1021/acs.chemrev.8b00567] [Citation(s) in RCA: 229] [Impact Index Per Article: 45.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Tetrahydroquinoline is one of the most important simple nitrogen heterocycles, being widespread in nature and present in a broad variety of pharmacologically active compounds. This Review summarizes the progress achieved in the chemistry of tetrahydroquinolines, with emphasis on their synthesis, during the period from mid-2010 to early 2018.
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Affiliation(s)
- Isravel Muthukrishnan
- Department of Chemistry, School of Chemical and Biotechnology , SASTRA Deemed University , Thanjavur 613401 , Tamil Nadu , India
| | - Vellaisamy Sridharan
- Department of Chemistry, School of Chemical and Biotechnology , SASTRA Deemed University , Thanjavur 613401 , Tamil Nadu , India.,Department of Chemistry and Chemical Sciences , Central University of Jammu , Rahya-Suchani (Bagla) , District-Samba, Jammu 181143 , Jammu and Kashmir , India
| | - J Carlos Menéndez
- Unidad de Química Orgańica y Farmacéutica, Departamento de Química en Ciencias Farmacéuticas, Facultad de Farmacia , Universidad Complutense , 28040 Madrid , Spain
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12
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Organocatalytic alkylation of carbohydrate-containing aldehydes with dihydroquinoline N,O-acetals: Absolute configuration of 1,2-dihydroquinolines. Chirality 2018; 31:127-137. [DOI: 10.1002/chir.23036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 10/23/2018] [Accepted: 10/23/2018] [Indexed: 12/20/2022]
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13
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Abstract
Amongst nitrogen heterocycles of different ring sizes and oxidation statuses, dihydropyridines (DHP) occupy a prominent role due to their synthetic versatility and occurrence in medicinally relevant compounds. One of the most straightforward synthetic approaches to polysubstituted DHP derivatives is provided by nucleophilic dearomatization of readily assembled pyridines. In this article, we collect and summarize nucleophilic dearomatization reactions of - pyridines reported in the literature between 2010 and mid-2018, complementing and updating previous reviews published in the early 2010s dedicated to various aspects of pyridine chemistry. Since functionalization of the pyridine nitrogen, rendering a (transient) pyridinium ion, is usually required to render the pyridine nucleus sufficiently electrophilic to suffer the attack of a nucleophile, the material is organized according to the type of N-functionalization. A variety of nucleophilic species (organometallic reagents, enolates, heteroaromatics, umpoled aldehydes) can be productively engaged in pyridine dearomatization reactions, including catalytic asymmetric implementations, providing useful and efficient synthetic platforms to (enantioenriched) DHPs. Conversely, pyridine nitrogen functionalization can also lead to pyridinium ylides. These dipolar species can undergo a variety of dipolar cycloaddition reactions with electron-poor dipolarophiles, affording polycyclic frameworks and embedding a DHP moiety in their structures.
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14
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Bertuzzi G, Pecorari D, Bernardi L, Fochi M. An organocatalytic enantioselective direct α-heteroarylation of aldehydes with isoquinoline N-oxides. Chem Commun (Camb) 2018; 54:3977-3980. [PMID: 29610810 DOI: 10.1039/c8cc01735b] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A new protocol for the enantioselective direct α-heteroarylation of aldehydes with isoquinoline N-oxides, via chiral enamine catalysis, has been successfully developed. High enantiomeric excesses and moderate to good yields were achieved for a variety of α-heteroarylated aldehydes.
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Affiliation(s)
- Giulio Bertuzzi
- Department of Industrial Chemistry "Toso Montanari" & INSTM RU Bologna, Alma Mater Studiorum University of Bologna, V. Risorgimento 4, 40136 Bologna, Italy.
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15
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Zhang T, Liang W, Huang Y, Li X, Liu Y, Yang B, He C, Zhou X, Zhang J. Bifunctional organic sponge photocatalyst for efficient cross-dehydrogenative coupling of tertiary amines to ketones. Chem Commun (Camb) 2018; 53:12536-12539. [PMID: 29109986 DOI: 10.1039/c7cc06997a] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A novel bifunctional organic sponge photocatalyst can enable the efficient coupling of tertiary amines with ketones in water. The asymmetric transformation can be also achieved by using this sponge photocatalyst.
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Affiliation(s)
- Teng Zhang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518060, P. R. China.
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16
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Kong D, Han S, Zi G, Hou G, Zhang J. Enantioselective Synthesis of Boryl Tetrahydroquinolines via Cu-Catalyzed Hydroboration. J Org Chem 2018; 83:1924-1932. [DOI: 10.1021/acs.joc.7b02860] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Duanyang Kong
- Key Laboratory
of Radiopharmaceuticals,
College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Suna Han
- Key Laboratory
of Radiopharmaceuticals,
College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Guofu Zi
- Key Laboratory
of Radiopharmaceuticals,
College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Guohua Hou
- Key Laboratory
of Radiopharmaceuticals,
College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Jiaxin Zhang
- Key Laboratory
of Radiopharmaceuticals,
College of Chemistry, Beijing Normal University, Beijing 100875, China
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17
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Touati B, El Bouakher A, Azizi MS, Taillier C, Ben Othman R, Trabelsi-Ayadi M, Antoniotti S, Duñach E, Dalla V. Atom-Economic Catalytic Direct Substitution of N,O-Acetals with Simple Ketones. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700530] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Bahria Touati
- Université du Havre; FR 3032 CNRS; URCOM EA3221; 25, Rue Philippe Lebon, BP 540 76058 Le Havre France
- Laboratoire d'Application de la Chimie aux Ressources et Substances Naturelles et à l'Environnement-LACReSNE-Faculté des Sciences de Bizerte; Université de Carthage; 7021 Bizerte, Carthage Tunisie
| | - Abderrahman El Bouakher
- Université du Havre; FR 3032 CNRS; URCOM EA3221; 25, Rue Philippe Lebon, BP 540 76058 Le Havre France
| | - Mohamed Salah Azizi
- Université du Havre; FR 3032 CNRS; URCOM EA3221; 25, Rue Philippe Lebon, BP 540 76058 Le Havre France
- Laboratoire d'Application de la Chimie aux Ressources et Substances Naturelles et à l'Environnement-LACReSNE-Faculté des Sciences de Bizerte; Université de Carthage; 7021 Bizerte, Carthage Tunisie
| | - Catherine Taillier
- Université du Havre; FR 3032 CNRS; URCOM EA3221; 25, Rue Philippe Lebon, BP 540 76058 Le Havre France
| | - Raja Ben Othman
- Ecole supérieure des sciences et de technologie de Hammam Sousse; Rue Lamine Abassi 4011 H. Sousse Tunisie
| | - Malika Trabelsi-Ayadi
- Laboratoire d'Application de la Chimie aux Ressources et Substances Naturelles et à l'Environnement-LACReSNE-Faculté des Sciences de Bizerte; Université de Carthage; 7021 Bizerte, Carthage Tunisie
| | - Sylvain Antoniotti
- Université Côte d'Azur; C.N.R.S.; Institut de Chimie de Nice; Parc Valrose 06108 Nice cedex 2 France
| | - Elisabet Duñach
- Université Côte d'Azur; C.N.R.S.; Institut de Chimie de Nice; Parc Valrose 06108 Nice cedex 2 France
| | - Vincent Dalla
- Université du Havre; FR 3032 CNRS; URCOM EA3221; 25, Rue Philippe Lebon, BP 540 76058 Le Havre France
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18
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Kong D, Han S, Wang R, Li M, Zi G, Hou G. Kinetic resolution of racemic 2-substituted 1,2-dihydroquinolines via asymmetric Cu-catalyzed borylation. Chem Sci 2017; 8:4558-4564. [PMID: 28936333 PMCID: PMC5590099 DOI: 10.1039/c7sc01556a] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2017] [Accepted: 04/11/2017] [Indexed: 01/20/2023] Open
Abstract
A highly efficient kinetic resolution of racemic 2-substituted 1,2-dihydroquinolines via asymmetric Cu-catalyzed borylation has been realized for the first time. Under mild conditions, a variety of chiral 3-boryl-1,2,3,4-tetrahydroquinolines containing two vicinal stereogenic centers as well as the recovered 2-substituted 1,2-dihydroquinolines were afforded after 30 minutes in high yields with up to 99% ee (dr > 99 : 1) and over 98% ee values, respectively, corresponding to kinetic selectivity factors of up to 569. Moreover, this protocol was successfully applied to the asymmetric synthesis of a selective estrogen receptor modulator.
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Affiliation(s)
- Duanyang Kong
- Key Laboratory of Radiopharmaceuticals , College of Chemistry , Beijing Normal University , No. 19 Xinjiekouwai St. , Beijing 100875 , China .
| | - Suna Han
- Key Laboratory of Radiopharmaceuticals , College of Chemistry , Beijing Normal University , No. 19 Xinjiekouwai St. , Beijing 100875 , China .
| | - Rui Wang
- Key Laboratory of Radiopharmaceuticals , College of Chemistry , Beijing Normal University , No. 19 Xinjiekouwai St. , Beijing 100875 , China .
| | - Meina Li
- Key Laboratory of Radiopharmaceuticals , College of Chemistry , Beijing Normal University , No. 19 Xinjiekouwai St. , Beijing 100875 , China .
| | - Guofu Zi
- Key Laboratory of Radiopharmaceuticals , College of Chemistry , Beijing Normal University , No. 19 Xinjiekouwai St. , Beijing 100875 , China .
| | - Guohua Hou
- Key Laboratory of Radiopharmaceuticals , College of Chemistry , Beijing Normal University , No. 19 Xinjiekouwai St. , Beijing 100875 , China .
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19
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Bertuzzi G, Sinisi A, Pecorari D, Caruana L, Mazzanti A, Bernardi L, Fochi M. Nucleophilic Dearomatization of Pyridines under Enamine Catalysis: Regio-, Diastereo-, and Enantioselective Addition of Aldehydes to Activated N-Alkylpyridinium Salts. Org Lett 2017; 19:834-837. [PMID: 28128963 DOI: 10.1021/acs.orglett.6b03824] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Catalytic addition of chiral enamines to azinium salts is a powerful tool for the synthesis of enantioenriched heterocycles. An unprecedented asymmetric dearomative addition of aldehydes to activated N-alkylpyridinium salts is presented. The process exhibits complete C-4 regioselectivity along with high levels of diastereo- and enantiocontrol, achieving a high-yielding synthesis of a broad range of optically active 1,4-dihydropyridines. Moreover, the presented methodology enables the synthesis of functionalized octahydropyrrolo[2,3-c]pyridines, the core structure of anticancer peptidomimetics.
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Affiliation(s)
- Giulio Bertuzzi
- Department of Industrial Chemistry "Toso Montanari" and INSTM RU Bologna, Alma Mater Studiorum-University of Bologna , Via Risorgimento 4, 40136 Bologna, Italy
| | - Alessandro Sinisi
- Department of Industrial Chemistry "Toso Montanari" and INSTM RU Bologna, Alma Mater Studiorum-University of Bologna , Via Risorgimento 4, 40136 Bologna, Italy
| | - Daniel Pecorari
- Department of Industrial Chemistry "Toso Montanari" and INSTM RU Bologna, Alma Mater Studiorum-University of Bologna , Via Risorgimento 4, 40136 Bologna, Italy
| | - Lorenzo Caruana
- Department of Industrial Chemistry "Toso Montanari" and INSTM RU Bologna, Alma Mater Studiorum-University of Bologna , Via Risorgimento 4, 40136 Bologna, Italy
| | - Andrea Mazzanti
- Department of Industrial Chemistry "Toso Montanari" and INSTM RU Bologna, Alma Mater Studiorum-University of Bologna , Via Risorgimento 4, 40136 Bologna, Italy
| | - Luca Bernardi
- Department of Industrial Chemistry "Toso Montanari" and INSTM RU Bologna, Alma Mater Studiorum-University of Bologna , Via Risorgimento 4, 40136 Bologna, Italy
| | - Mariafrancesca Fochi
- Department of Industrial Chemistry "Toso Montanari" and INSTM RU Bologna, Alma Mater Studiorum-University of Bologna , Via Risorgimento 4, 40136 Bologna, Italy
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