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Gambhir D, Singh S, Singh RP. Enamine/Iminium-based Dual Organocatalytic Systems for Asymmetric Catalysis and Synthesis. Chem Asian J 2023:e202300627. [PMID: 37910066 DOI: 10.1002/asia.202300627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 10/22/2023] [Accepted: 10/31/2023] [Indexed: 11/03/2023]
Abstract
The rational combination of two catalysts to expedite the construction of chiral complex biologically and pharmacologically relevant chiral compounds has widely gained momentum over the past decade. In particular, enamine or iminium catalysis ensuing from the activation of aldehyde or ketone by chiral amine catalysts in conjugation with other organocatalytic cycles has facilitated several asymmetric transformations to yield the enantioenriched products. Regardless of the considerable discussion on the various dual catalytic approaches, literature lacks a comprehensive review focusing on the enamine and iminium-based dual organocatalytic systems. Thus, this review article has discussed the noteworthy achievements in the field of asymmetric catalysis and synthesis catalyzed by the enamine and iminium-based dual organocatalytic systems.
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Affiliation(s)
- Diksha Gambhir
- Prof. Ravi P. Singh, Department of Chemistry, Institute of Technology Delhi, Hauz Khas, New Delhi, 110-016, India
| | - Sanjay Singh
- Prof. Ravi P. Singh, Department of Chemistry, Institute of Technology Delhi, Hauz Khas, New Delhi, 110-016, India
| | - Ravi P Singh
- Prof. Ravi P. Singh, Department of Chemistry, Institute of Technology Delhi, Hauz Khas, New Delhi, 110-016, India
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2
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Sun M, Gui J, Zhong R, Wu H, Liu S, Li J, Yang J, Wang Z. TfOH-catalyzed direct Michael addition and cascade cyclization reactions of unactivated ketones: A divergent route to functionalized benzofurans and benzofuro[3,2-b]pyridines. Tetrahedron 2023. [DOI: 10.1016/j.tet.2023.133394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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3
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Asymmetric Conjugate Addition of Ketones to Maleimides Organocatalyzed by a Chiral Primary Amine-Salicylamide. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27196668. [PMID: 36235205 PMCID: PMC9573004 DOI: 10.3390/molecules27196668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 09/29/2022] [Accepted: 09/30/2022] [Indexed: 11/17/2022]
Abstract
Enantioenriched substituted succinimides are interesting compounds, and their asymmetric organocatalytic synthesis by the conjugated addition of ketones to maleimides has been scarcely explored. This study shows the enantioselective conjugate addition of ketones to maleimides organocatalyzed by a simple primary amine-salicylamide derived from a chiral trans-cyclohexane-1,2-diamine, which provides the desired succinimides in good to excellent yields (up to 98%) and with moderate to excellent enantioselectivities (up to 99%).
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4
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β-Amino Acid Organocatalysts in the Asymmetric Michael Addition of Isobutyraldehyde to N-Substituted Maleimides. Catalysts 2022. [DOI: 10.3390/catal12090992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Asymmetric Michael additions of carbonyl compounds to N-substituted maleimides are among the most convenient reactions to prepare optically pure succinimide building blocks. Although a few β-amino acids were found to be highly efficient organocatalysts in the addition of α-branched aldehydes, the effect of their structure on the results of these reactions has not yet been investigated. In the present study, we disclose several unexpected and interesting structural effects of aliphatic and cycloaliphatic β-amino acids obtained in the enantioselective conjugate addition of isobutyraldehyde to N-benzylmaleimide. The dependence of the sense of the enantioselectivity on the bulkiness of the substituent on the β-carbon atom, the beneficial spatial arrangements of the functional groups in cis isomers with cyclohexane scaffold and the inversion of the enantioselectivity depending on the absence of a base additive observed with some trans isomers are unprecedented findings. The minor influence of the nitrogen substituent of the maleimide ring on both the reaction rate and the enantioselectivity was also evidenced using alicyclic β-amino acid prepared from an easily available terpene derivative.
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5
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Del Vecchio A, Sinibaldi A, Nori V, Giorgianni G, Di Carmine G, Pesciaioli F. Synergistic Strategies in Aminocatalysis. Chemistry 2022; 28:e202200818. [PMID: 35666172 PMCID: PMC9539941 DOI: 10.1002/chem.202200818] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Indexed: 12/20/2022]
Abstract
Synergistic catalysis offers the unique possibility of simultaneous activation of both the nucleophile and the electrophile in a reaction. A requirement for this strategy is the stability of the active species towards the reaction conditions and the two concerted catalytic cycles. Since the beginning of the century, aminocatalysis has been established as a platform for the stereoselective activation of carbonyl compounds through HOMO-raising or LUMO-lowering. The burgeoning era of aminocatalysis has been driven by a deep understanding of these activation and stereoinduction modes, thanks to the introduction of versatile and privileged chiral amines. The aim of this review is to cover recent developments in synergistic strategies involving aminocatalysis in combination with organo-, metal-, photo-, and electro-catalysis, focusing on the evolution of privileged aminocatalysts architectures.
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Affiliation(s)
- Antonio Del Vecchio
- Department of Physical and Chemical Sciences Università degli Studidell'Aquilavia Vetoio67100L'AquilaItaly
| | - Arianna Sinibaldi
- Department of Physical and Chemical Sciences Università degli Studidell'Aquilavia Vetoio67100L'AquilaItaly
| | - Valeria Nori
- Department of Physical and Chemical Sciences Università degli Studidell'Aquilavia Vetoio67100L'AquilaItaly
| | - Giuliana Giorgianni
- Department of Physical and Chemical Sciences Università degli Studidell'Aquilavia Vetoio67100L'AquilaItaly
| | - Graziano Di Carmine
- Department of Chemical, Pharmaceutical and Agricultural Sciences Università degli Studi di FerraraVia Fossato di Mortara 1744121FerraraItaly
| | - Fabio Pesciaioli
- Department of Physical and Chemical Sciences Università degli Studidell'Aquilavia Vetoio67100L'AquilaItaly
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6
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Shim JH, Cheun SH, Kim HS, Ha DC. Enantioselective Organocatalyzed Michael Addition of Isobutyraldehyde to Maleimides in Aqueous Media. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27092759. [PMID: 35566109 PMCID: PMC9101813 DOI: 10.3390/molecules27092759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 04/19/2022] [Accepted: 04/21/2022] [Indexed: 11/16/2022]
Abstract
Thiourea was introduced into (R,R)-1,2-diphenylethylenediamine as an organocatalyst to promote the reaction between isobutyraldehydes and maleimides. Enantioselective Michael addition reaction was carried out as an eco-friendly method using water as the solvent. As a result of the reaction between isobutyraldehyde and maleimide, ≥97% yield and 99% enantioselectivity were obtained at a low catalyst loading of 0.01 mol%. The solvent effect can be explained by theoretical calculations that indicate the participation of a transition state, in which the CF3 substituent of the catalyst is a hydrogen bond activated by the surrounding water molecules. This discovery enabled the use of low catalyst loading in the organic reactions of chiral substances for pharmaceutical applications. Furthermore, a solvent effect for Michael reaction of the organocatalysts was proposed, and the organic reaction mechanisms were determined through quantum calculations.
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Affiliation(s)
- Jae Ho Shim
- Department of Anatomy, College of Medicine, Korea University, 73, Goryeodae-ro, Seongbuk-gu, Seoul 02481, Korea;
- Correspondence: ; Tel.: +82-2-2286-1125
| | - Seok Hyun Cheun
- Department of Chemistry, College of Science, Korea University, 145 Anam-ro, Seoul 02481, Korea; (S.H.C.); (D.-C.H.)
| | - Hyeon Soo Kim
- Department of Anatomy, College of Medicine, Korea University, 73, Goryeodae-ro, Seongbuk-gu, Seoul 02481, Korea;
| | - Deok-Chan Ha
- Department of Chemistry, College of Science, Korea University, 145 Anam-ro, Seoul 02481, Korea; (S.H.C.); (D.-C.H.)
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7
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Kozma V, Szőllősi G. Enantioselective Michael addition of aldehydes to maleimides catalysed by surface-adsorbed natural amino acids. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00545j] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Chiral hybrid materials obtained by adsorption of primary α-amino acids on the surface of inorganic oxides are economic, recyclable, highly enantioselective heterogeneous catalysts for the Michael addition of aldehydes to N-substituted maleimides.
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Affiliation(s)
- Viktória Kozma
- Department of Organic Chemistry, University of Szeged, 6720 Szeged, Dóm tér 8, Hungary
| | - György Szőllősi
- SZTE-ELKH Stereochemistry Research Group, University of Szeged, 6720 Szeged, Eötvös utca 6, Hungary
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Landeros JM, Cruz‐Hernández C, Juaristi E. α‐Amino Acids and α,β‐Dipeptides Intercalated into Hydrotalcite: Efficient Catalysts in the Asymmetric Michael Addition Reaction of Aldehydes to
N
‐Substituted Maleimides. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100877] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- José M. Landeros
- Departamento de Química, Centro de Investigación y de Estudios Avanzados Instituto Politécnico Nacional Avenida IPN #2508 07360 Ciudad de México Mexico
| | - Carlos Cruz‐Hernández
- Departamento de Química, Centro de Investigación y de Estudios Avanzados Instituto Politécnico Nacional Avenida IPN #2508 07360 Ciudad de México Mexico
| | - Eusebio Juaristi
- Departamento de Química, Centro de Investigación y de Estudios Avanzados Instituto Politécnico Nacional Avenida IPN #2508 07360 Ciudad de México Mexico
- El Colegio Nacional Luis González Obregón 23, Centro Histórico 06020 Ciudad de México Mexico
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9
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Wei S, Bao X, Nawaz S, Qu J, Wang B. Identification of a tartrate-based modular guanidine towards highly asymmetric Michael addition of 3-aminooxindoles to nitroolefins. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2020.152741] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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11
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Horibe T, Hazeyama T, Nakata Y, Takeda K, Ishihara K. Enantioselective 1,4‐Addition Reaction of α,β‐Unsaturated Carboxylic Acids with Cycloalkanones Using Cooperative Chiral Amine–Boronic Acid Catalysts. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007639] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Takahiro Horibe
- Graduate School of Engineering Nagoya University B2-3(611) Furo-cho, Chikusa Nagoya 464-8603 Japan
| | - Takashi Hazeyama
- Graduate School of Engineering Nagoya University B2-3(611) Furo-cho, Chikusa Nagoya 464-8603 Japan
| | - Yuto Nakata
- Graduate School of Engineering Nagoya University B2-3(611) Furo-cho, Chikusa Nagoya 464-8603 Japan
| | - Kazuki Takeda
- Graduate School of Engineering Nagoya University B2-3(611) Furo-cho, Chikusa Nagoya 464-8603 Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering Nagoya University B2-3(611) Furo-cho, Chikusa Nagoya 464-8603 Japan
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12
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Horibe T, Hazeyama T, Nakata Y, Takeda K, Ishihara K. Enantioselective 1,4‐Addition Reaction of α,β‐Unsaturated Carboxylic Acids with Cycloalkanones Using Cooperative Chiral Amine–Boronic Acid Catalysts. Angew Chem Int Ed Engl 2020; 59:17256-17260. [DOI: 10.1002/anie.202007639] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Indexed: 01/30/2023]
Affiliation(s)
- Takahiro Horibe
- Graduate School of Engineering Nagoya University B2-3(611) Furo-cho, Chikusa Nagoya 464-8603 Japan
| | - Takashi Hazeyama
- Graduate School of Engineering Nagoya University B2-3(611) Furo-cho, Chikusa Nagoya 464-8603 Japan
| | - Yuto Nakata
- Graduate School of Engineering Nagoya University B2-3(611) Furo-cho, Chikusa Nagoya 464-8603 Japan
| | - Kazuki Takeda
- Graduate School of Engineering Nagoya University B2-3(611) Furo-cho, Chikusa Nagoya 464-8603 Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering Nagoya University B2-3(611) Furo-cho, Chikusa Nagoya 464-8603 Japan
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13
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Jakkampudi S, Konda S, Arman H, Zhao JC. Diastereodivergent Synthesis of Bridged Tetrahydroisoquinoline Derivatives Catalyzed by Modularly Designed Organocatalysts. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000227] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Satish Jakkampudi
- Department of Chemistry University of Texas at San Antonio, One UTSA Circle San Antonio Texas 78249-0698 USA
| | - Swapna Konda
- Department of Chemistry University of Texas at San Antonio, One UTSA Circle San Antonio Texas 78249-0698 USA
| | - Hadi Arman
- Department of Chemistry University of Texas at San Antonio, One UTSA Circle San Antonio Texas 78249-0698 USA
| | - John C.‐G. Zhao
- Department of Chemistry University of Texas at San Antonio, One UTSA Circle San Antonio Texas 78249-0698 USA
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14
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Kozma V, Fülöp F, Szőllősi G. 1,2‐Diamine‐Derived (thio)Phosphoramide Organocatalysts in Asymmetric Michael Additions. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000335] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Viktória Kozma
- Department of Organic ChemistryUniversity of Szeged 6720 Szeged Dóm tér 8 Hungary
| | - Ferenc Fülöp
- Institute of Pharmaceutical ChemistryUniversity of Szeged 6720 Szeged Eötvös utca 6 Hungary
- MTA-SZTE Stereochemistry Research GroupUniversity of Szeged 6720 Szeged Eötvös utca 6 Hungary
- University of Szeged, Interdisciplinary Excellence CentreInstitute of Pharmaceutical Chemistry 6720 Szeged Eötvös utca 6 Hungary
| | - György Szőllősi
- MTA-SZTE Stereochemistry Research GroupUniversity of Szeged 6720 Szeged Eötvös utca 6 Hungary
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15
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Jan MS, Ahmad S, Hussain F, Ahmad A, Mahmood F, Rashid U, Abid OUR, Ullah F, Ayaz M, Sadiq A. Design, synthesis, in-vitro, in-vivo and in-silico studies of pyrrolidine-2,5-dione derivatives as multitarget anti-inflammatory agents. Eur J Med Chem 2019; 186:111863. [PMID: 31740050 DOI: 10.1016/j.ejmech.2019.111863] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 11/05/2019] [Accepted: 11/06/2019] [Indexed: 12/11/2022]
Abstract
In recent years, drug discovery paradigm has been shifted from conventional single target inhibition toward multitarget design concept. In current research, we have reported synthesis, in-vitro, in-vivo and acute toxicity determination of N-substituted pyrrolidine-2,5-dione derivatives as multitarget anti-inflammatory agents. We synthesized cycloalkyl, alkyl and aryl carbonyl derivatives by the Michael addition of ketones to N-substituted maleimides using self-assembled three component system as an organocatalyst. Anti-inflammatory potential of the compounds was determined by using different in-vitro assays, like cyclooxygenase-1, cyclooxygenase-2 and 5-lipoxygenase, albumin denaturation and anti-protease assays. Amongst the synthesized compounds, 13a-e series of compounds showed inhibition in low micromolar to submicromolar ranges. These compounds also demonstrated COX-2 selectivity. Compound 13e with IC50 value 0.98 μM and SI of 31.5 emerged as the most potent inhibitor of COX-2. Based on in-vitro results, in-vivo anti-inflammatory investigations were performed on compounds 3b and 13evia carrageenan induced paw edema test. The possible mode of action of compounds 3b and 13e were ascertained with various mediators like histamine, bradykinin, prostaglandin and leukotriene. In-vivo acute toxicity study showed the safety of synthesized compounds up to 1000 mg/kg dose. The selectivity of the compounds against cyclooxygenase isoforms was supported by docking simulations. Selective COX-2 inhibitors showed significant interactions with the amino acid residues present in additional secondary COX-2 enzyme pocket. Furthermore, in-silico pharmacokinetic predictions confer the drug-like characteristics.
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Affiliation(s)
- Muhammad Saeed Jan
- Department of Pharmacy, Faculty of Biological Sciences, University of Malakand, Chakdara, 18000, Dir (L), KP, Pakistan
| | - Sajjad Ahmad
- Department of Pharmacy, Faculty of Biological Sciences, University of Malakand, Chakdara, 18000, Dir (L), KP, Pakistan
| | - Fida Hussain
- Department of Pharmacy, Faculty of Biological Sciences, University of Malakand, Chakdara, 18000, Dir (L), KP, Pakistan; Department of Pharmacy, University of Swabi, Swabi, KP, Pakistan
| | - Ashfaq Ahmad
- Department of Pharmacy, Faculty of Biological Sciences, University of Malakand, Chakdara, 18000, Dir (L), KP, Pakistan
| | - Fawad Mahmood
- Department of Pharmacy, Sarhad University of Science & Technology, Peshawar, KPK, Pakistan
| | - Umer Rashid
- Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, 22060, Abbottabad, Pakistan.
| | | | - Farhat Ullah
- Department of Pharmacy, Faculty of Biological Sciences, University of Malakand, Chakdara, 18000, Dir (L), KP, Pakistan
| | - Muhammad Ayaz
- Department of Pharmacy, Faculty of Biological Sciences, University of Malakand, Chakdara, 18000, Dir (L), KP, Pakistan
| | - Abdul Sadiq
- Department of Pharmacy, Faculty of Biological Sciences, University of Malakand, Chakdara, 18000, Dir (L), KP, Pakistan.
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Jakkampudi S, Parella R, Arman HD, Zhao JCG. Diastereodivergent Synthesis of Hexahydro-6H-benzo[c]chromen-6-one Derivatives Catalyzed by Modularly Designed Organocatalysts. Chemistry 2019; 25:7515-7520. [PMID: 30895663 PMCID: PMC6548622 DOI: 10.1002/chem.201806447] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Indexed: 11/09/2022]
Abstract
The diastereodivergent synthesis of hexahydro-6H-benzo[c]chromen-6-one derivatives with good to high diastereoselectivities (up to 98:2 d.r.) and enantioselectivities (up to >99 % ee) has been achieved by using a domino Michael/Michael/hemiacetalization reaction between trans-2-hydroxy-β-nitrostyrenes and trans-7-oxo-5-heptenals followed by oxidation. With use of appropriate modularly designed organocatalysts (MDOs) that are self-assembled in situ from amino acid derivatives and cinchona alkaloid derivatives, two different diastereomers of the desired hexahydro-6H-benzo[c]chromen-6-ones are obtained from the same substrates.
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Affiliation(s)
- Satish Jakkampudi
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas, 78249-0698, USA
| | - Ramarao Parella
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas, 78249-0698, USA
| | - Hadi D Arman
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas, 78249-0698, USA
| | - John C-G Zhao
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas, 78249-0698, USA
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Dendrimeric α,β-dipeptidic conjugates as organocatalysts in the asymmetric Michael addition reaction of isobutyraldehyde to N-phenylmaleimides. MONATSHEFTE FUR CHEMIE 2019. [DOI: 10.1007/s00706-018-2338-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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18
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Tehri P, Peddinti RK. DBU-catalyzed [3 + 2] cycloaddition and Michael addition reactions of 3-benzylidene succinimides with 3-ylidene oxindoles and chalcones. Org Biomol Chem 2019; 17:3964-3970. [PMID: 30942810 DOI: 10.1039/c9ob00385a] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A metal-free DBU catalyzed protocol has been developed for the regioselective [3 + 2] cycloaddition reactions of 3-benzylidene succinimides with 3-ylidene oxindoles to furnish spirooxindole derivatives. The 3-benzylidene succinimides underwent Michael addition with chalcones to provide benzylidene succinimide-tethered propanones. All the reactions proceeded under mild conditions and the products were isolated by simple filtration and washing with ethanol in good yields. The current methodology utilizes simple precursors and provides functionally-rich succinimides with two to five contiguous stereocenters in excellent diastereoselectivity and with complete regioselectivity.
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Affiliation(s)
- Piyush Tehri
- Department of Chemistry, Indian Institute of Technology, Roorkee-247667, Uttarakhand, India.
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19
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Parella R, Jakkampudi S, Arman H, Zhao JCG. Stereoselective Synthesis of 3-Oxabicyclo[3.3.1]nonan-2-ones via a Domino Reaction Catalyzed by Modularly Designed Organocatalysts. Adv Synth Catal 2019; 361:208-213. [PMID: 31467501 PMCID: PMC6715131 DOI: 10.1002/adsc.201800987] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Indexed: 01/29/2023]
Abstract
A highly stereoselective method for the synthesis of functionalized 3-oxabicyclo[3.3.1]nonan-2-one derivatives with four contiguous stereogenic centers, including one tetrasubstituted stereogenic center, was realized through an organocatalytic domino Michael-hemiacetalization-Michael reaction of (E)-3-aryl-2-nitroprop-2-enols and (E)-7-aryl-7-oxohept-5-enals followed by a PCC oxidation. Using the modularly designed organocatalysts (MDOs) self-assembled from cinchona alkaloid derivatives and amino acids in the reaction media, the title products were obtained in good yields (up to 84%), excellent diastereoselectivities (> 99:1 dr), and high enantioselectivities (up to 96% ee).
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Affiliation(s)
- Ramarao Parella
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, USA, Fax: (+1)-210-458-7428; phone: (+1)-210-458-5432
| | - Satish Jakkampudi
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, USA, Fax: (+1)-210-458-7428; phone: (+1)-210-458-5432
| | - Hadi Arman
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, USA, Fax: (+1)-210-458-7428; phone: (+1)-210-458-5432
| | - John C.-G. Zhao
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, USA, Fax: (+1)-210-458-7428; phone: (+1)-210-458-5432
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20
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Jakkampudi S, Parella R, Zhao JCG. Stereoselective synthesis of chromane derivatives via a domino reaction catalyzed by modularly designed organocatalysts. Org Biomol Chem 2018; 17:151-155. [PMID: 30525178 PMCID: PMC6317902 DOI: 10.1039/c8ob02677g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A highly enantio- and diastereoselective method for the synthesis of functionalized chroman-2-ones and chromanes was achieved by using an organocatalytic domino Michael/hemiacetalization reaction of aliphatic aldehydes and (E)-2-(2-nitrovinyl)phenols followed by a PCC oxidation and dehydroxylation, respectively. Using the modularly designed organocatalysts (MDOs) self-assembled from cinchona alkaloid derivatives and amino acids in the reaction media, the title products were obtained in good to high yields (up to 97%) and excellent diastereoselectivities (up to 99 : 1 dr) and enantioselectivities (up to 99% ee).
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Affiliation(s)
- Satish Jakkampudi
- Department of Chemistry, University of Texas at San Antonio One UTSA Circle, San Antonio, TX 78249-0698, USA.
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Torregrosa-Chinillach A, Moragues A, Pérez-Furundarena H, Chinchilla R, Gómez-Bengoa E, Guillena G. Enantioselective Michael Addition of Aldehydes to Maleimides Organocatalyzed by a Chiral Primary Amine-Salicylamide. Molecules 2018; 23:molecules23123299. [PMID: 30545145 PMCID: PMC6320823 DOI: 10.3390/molecules23123299] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 12/05/2018] [Accepted: 12/09/2018] [Indexed: 11/04/2022] Open
Abstract
A primary amine-salicylamide derived from chiral trans-cyclohexane-1,2-diamine was used as an organocatalyst for the enantioselective conjugate addition of aldehydes, mainly α,α-disubstituted to N-substituted maleimides. The reaction was performed in toluene as a solvent at room temperature. The corresponding enantioenriched adducts were obtained with high yields and enantioselectivities up to 94%. Theoretical calculations were used to justify the stereoinduction.
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Affiliation(s)
- Alejandro Torregrosa-Chinillach
- Departamento de Química Orgánica, Facultad de Ciencias, and Instituto de Síntesis Orgánica (ISO), Uni-versidad de Alicante, Apdo. 99, 03080 Alicante, Spain.
| | - Adrien Moragues
- Departamento de Química Orgánica, Facultad de Ciencias, and Instituto de Síntesis Orgánica (ISO), Uni-versidad de Alicante, Apdo. 99, 03080 Alicante, Spain.
| | - Haritz Pérez-Furundarena
- Departamento de Química Orgánica I, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain.
| | - Rafael Chinchilla
- Departamento de Química Orgánica, Facultad de Ciencias, and Instituto de Síntesis Orgánica (ISO), Uni-versidad de Alicante, Apdo. 99, 03080 Alicante, Spain.
| | - Enrique Gómez-Bengoa
- Departamento de Química Orgánica I, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain.
| | - Gabriela Guillena
- Departamento de Química Orgánica, Facultad de Ciencias, and Instituto de Síntesis Orgánica (ISO), Uni-versidad de Alicante, Apdo. 99, 03080 Alicante, Spain.
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22
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Konda S, Zhao JCG. Enantioselective anti-Mannich reaction catalyzed by modularly designed organocatalysts. Tetrahedron 2018; 74:6166-6172. [PMID: 30923409 PMCID: PMC6433386 DOI: 10.1016/j.tet.2018.09.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A highly stereoselective method for achieving the anti-Mannich reaction of aldehydes and ketones with ethyl (4-methoxyphenylimino)acetate was realized using the modularly designed organocatalysts (MDOs) self-assembled from cinchona alkaloid derivatives and (A)-pyrrolidien-3-carboxylic acid in the reaction media. The desired anti-Mannich products were obtained in good to excellent yields (up to 93%), excellent diastereoselectivities (up to 99:1 dr), and good to high enantioselectivities (up to 99% ee).
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Affiliation(s)
- Swapna Konda
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, USA
| | - John C.-G. Zhao
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, USA
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23
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Szőllősi G, Kozma V. Design of Heterogeneous Organocatalyst for the Asymmetric Michael Addition of Aldehydes to Maleimides. ChemCatChem 2018. [DOI: 10.1002/cctc.201800919] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- György Szőllősi
- MTA-SZTE Stereochemistry Research Group Dóm tér 8 Szeged 6720 Hungary
| | - Viktória Kozma
- Department of Organic ChemistryUniversity of Szeged Dóm tér 8 Szeged 6720 Hungary
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24
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Yarlagadda S, Reddy CR, Ramesh B, Kumar GR, Sridhar B, Reddy BVS. Organocatalytic Enantioselective Michael Addition of 3-Indolinone-2-Carboxylates to Maleimides. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701670] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Suresh Yarlagadda
- Centre for Semiochemicals; CSIR-Indian Institute of Chemical Technology; 500 007 Hyderabad - India
| | - C. Ravikumar Reddy
- Centre for Semiochemicals; CSIR-Indian Institute of Chemical Technology; 500 007 Hyderabad - India
| | - Boora Ramesh
- Centre for Semiochemicals; CSIR-Indian Institute of Chemical Technology; 500 007 Hyderabad - India
| | - G. Ravi Kumar
- Centre for Semiochemicals; CSIR-Indian Institute of Chemical Technology; 500 007 Hyderabad - India
| | - B. Sridhar
- Laboratory of X-ray Crystallography; CSIR-Indian Institute of Chemical Technology; 500 007 Hyderabad - India
| | - B. V. Subba Reddy
- Centre for Semiochemicals; CSIR-Indian Institute of Chemical Technology; 500 007 Hyderabad - India
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25
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Chanda T, Zhao JC. Recent Progress in Organocatalytic Asymmetric Domino Transformations. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201701059] [Citation(s) in RCA: 121] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Tanmoy Chanda
- Department of Chemistry University of Texas at San Antonio One UTSA Circle San Antonio TX 78249-0698 USA
| | - John C.‐G. Zhao
- Department of Chemistry University of Texas at San Antonio One UTSA Circle San Antonio TX 78249-0698 USA
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26
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Kaur J, Chauhan P, Singh S, Chimni SS. Journey Heading towards Enantioselective Synthesis Assisted by Organocatalysis. CHEM REC 2017; 18:137-153. [DOI: 10.1002/tcr.201700020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Indexed: 12/27/2022]
Affiliation(s)
- Jasneet Kaur
- Department of Chemistry, U.G.C. Centre of Advanced Studies in Chemistry; Guru Nanak Dev University; Amritsar India
| | - Pankaj Chauhan
- Institute of Organic Chemistry; RWTH Aachen University, Germany
| | - Sarbjit Singh
- Department of Chemistry; University of Texas at Dallas, USA
| | - Swapandeep Singh Chimni
- Department of Chemistry, U.G.C. Centre of Advanced Studies in Chemistry; Guru Nanak Dev University; Amritsar India
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27
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Avila-Ortiz CG, Díaz-Corona L, Jiménez-González E, Juaristi E. Asymmetric Michael Addition Organocatalyzed by α,β-Dipeptides under Solvent-Free Reaction Conditions. Molecules 2017; 22:molecules22081328. [PMID: 28796165 PMCID: PMC6152315 DOI: 10.3390/molecules22081328] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 07/24/2017] [Accepted: 07/27/2017] [Indexed: 01/23/2023] Open
Abstract
The application of six novel α,β-dipeptides as chiral organocatalysts in the asymmetric Michael addition reaction between enolizable aldehydes and N-arylmaleimides or nitroolefins is described. With N-arylmaleimides as substrates, the best results were achieved with dipeptide 2 as a catalyst in the presence of aq. NaOH. Whereas dipeptides 4 and 6 in conjunction with 4-dimethylaminopyridine (DMAP) and thiourea as a hydrogen bond donor proved to be highly efficient organocatalytic systems in the enantioselective reaction between isobutyraldehyde and various nitroolefins.
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Affiliation(s)
- C Gabriela Avila-Ortiz
- Departamento de Química, Centro de Investigación y de Estudios Avanzados, Avenida IPN 2508, Ciudad de México 07360, Mexico.
| | - Lenin Díaz-Corona
- Departamento de Química, Centro de Investigación y de Estudios Avanzados, Avenida IPN 2508, Ciudad de México 07360, Mexico.
| | - Erika Jiménez-González
- Departamento de Química, Centro de Investigación y de Estudios Avanzados, Avenida IPN 2508, Ciudad de México 07360, Mexico.
| | - Eusebio Juaristi
- Departamento de Química, Centro de Investigación y de Estudios Avanzados, Avenida IPN 2508, Ciudad de México 07360, Mexico.
- El Colegio Nacional, Luis González Obregón 23, Centro Histórico, Ciudad de México 06020, Mexico.
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28
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Anebouselvy K, Shruthi KS, Ramachary DB. Asymmetric Supramolecular Organocatalysis: A Complementary Upgrade to Organocatalysis. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700611] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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29
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Flores-Ferrándiz J, Chinchilla R. Organocatalytic enantioselective conjugate addition of aldehydes to maleimides in deep eutectic solvents. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.tetasy.2016.12.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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30
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Yu H, Xu P, He H, Zhu J, Lin H, Han S. Highly enantioselective Biginelli reactions using methanopyroline/thiourea – based dual organocatalyst systems: asymmetric synthesis of 4-substituted unsaturated aryl dihydropyrimidines. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.tetasy.2016.11.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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31
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Affiliation(s)
- Manisha Bihani
- Department of Chemistry; University of Texas at San Antonio; One UTSA Circle San Antonio TX 78249-0698 USA
| | - John C.-G. Zhao
- Department of Chemistry; University of Texas at San Antonio; One UTSA Circle San Antonio TX 78249-0698 USA
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32
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Stereoselective conjugate addition of carbonyl compounds to maleimides using a diaminomethyleneindenedione organocatalyst. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.tetasy.2016.07.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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33
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Grünenfelder CE, Kisunzu JK, Wennemers H. Peptide-Catalyzed Stereoselective Conjugate Addition Reactions of Aldehydes to Maleimide. Angew Chem Int Ed Engl 2016; 55:8571-4. [DOI: 10.1002/anie.201602230] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Indexed: 12/31/2022]
Affiliation(s)
- Claudio E. Grünenfelder
- Laboratorium für Organische Chemie; ETH Zürich; Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Jessica K. Kisunzu
- Laboratorium für Organische Chemie; ETH Zürich; Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Helma Wennemers
- Laboratorium für Organische Chemie; ETH Zürich; Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
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34
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Grünenfelder CE, Kisunzu JK, Wennemers H. Peptide-Catalyzed Stereoselective Conjugate Addition Reactions of Aldehydes to Maleimide. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602230] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Claudio E. Grünenfelder
- Laboratorium für Organische Chemie; ETH Zürich; Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Jessica K. Kisunzu
- Laboratorium für Organische Chemie; ETH Zürich; Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Helma Wennemers
- Laboratorium für Organische Chemie; ETH Zürich; Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
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35
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Reddy PS, Reddy MVK, Reddy PVG. Camphor-derived thioureas: Synthesis and application in asymmetric Kabachnik-Fields reaction. CHINESE CHEM LETT 2016. [DOI: 10.1016/j.cclet.2016.01.046] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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36
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Huang H, Konda S, Zhao JCG. Diastereodivergent Catalysis Using Modularly Designed Organocatalysts: Synthesis of bothcis- andtrans-Fused Pyrano[2,3-b]pyrans. Angew Chem Int Ed Engl 2016; 55:2213-6. [DOI: 10.1002/anie.201510134] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 11/21/2015] [Indexed: 01/02/2023]
Affiliation(s)
- Huicai Huang
- Department of Chemistry; University of Texas at San Antonio; One UTSA Circle San Antonio TX 78249-0698 USA
| | - Swapna Konda
- Department of Chemistry; University of Texas at San Antonio; One UTSA Circle San Antonio TX 78249-0698 USA
| | - John C.-G. Zhao
- Department of Chemistry; University of Texas at San Antonio; One UTSA Circle San Antonio TX 78249-0698 USA
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37
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Huang H, Konda S, Zhao JCG. Diastereodivergent Catalysis Using Modularly Designed Organocatalysts: Synthesis of bothcis- andtrans-Fused Pyrano[2,3-b]pyrans. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201510134] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Huicai Huang
- Department of Chemistry; University of Texas at San Antonio; One UTSA Circle San Antonio TX 78249-0698 USA
| | - Swapna Konda
- Department of Chemistry; University of Texas at San Antonio; One UTSA Circle San Antonio TX 78249-0698 USA
| | - John C.-G. Zhao
- Department of Chemistry; University of Texas at San Antonio; One UTSA Circle San Antonio TX 78249-0698 USA
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38
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Hang Z, Zhu J, Lian X, Xu P, Yu H, Han S. A highly enantioselective Biginelli reaction using self-assembled methanoproline–thiourea organocatalysts: asymmetric synthesis of 6-isopropyl-3,4-dihydropyrimidines. Chem Commun (Camb) 2016; 52:80-3. [DOI: 10.1039/c5cc07880f] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient self-assembled methanoproline–thiourea organocatalyst for the synthesis of optically active 6-isopropyl-3,4-dihydropyrimidines via an asymmetric Biginelli reaction was developed, which is superior to the individual precatalyst.
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Affiliation(s)
- Zhijun Hang
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- P. R. China
| | - Jun Zhu
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- P. R. China
| | - Xiang Lian
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- P. R. China
| | - Peng Xu
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- P. R. China
| | - Han Yu
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- P. R. China
- Department of Chemistry
| | - Sheng Han
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- P. R. China
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39
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Ramachary DB, Shruthi KS, Madhavachary R. A Modularly Designed Supramolecular Organocatalyst as an Effective Stimulant for the Highly Asymmetric Michael Addition of Ketones to Nitro Olefins. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500994] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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40
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Flores-Ferrándiz J, Fiser B, Gómez-Bengoa E, Chinchilla R. Solvent-Induced Reversal of Enantioselectivity in the Synthesis of Succinimides by the Addition of Aldehydes to Maleimides Catalysed by Carbamate-Monoprotected 1,2-Diamines. European J Org Chem 2015. [DOI: 10.1002/ejoc.201403415] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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41
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Kumar A, Sharma V, Kaur J, Kumar N, Chimni SS. Maleimide as an efficient nucleophilic partner in the aza-Morita–Baylis–Hillman reaction: synthesis of chiral 3-substituted-3-aminooxindoles. Org Biomol Chem 2015; 13:5629-35. [DOI: 10.1039/c5ob00182j] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A highly enantioselective β-isocupreidine catalyzed aza-Morita–Baylis–Hillman reaction of maleimides with isatin derived ketimines provides 3-substituted-3-aminooxindoles with enantiomeric excess upto 99%.
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Affiliation(s)
- Akshay Kumar
- Department of Chemistry
- U.G.C. Centre of Advance Studies in Chemistry
- Guru Nanak Dev University
- Amritsar, India
| | - Vivek Sharma
- Department of Chemistry
- U.G.C. Centre of Advance Studies in Chemistry
- Guru Nanak Dev University
- Amritsar, India
| | - Jasneet Kaur
- Department of Chemistry
- U.G.C. Centre of Advance Studies in Chemistry
- Guru Nanak Dev University
- Amritsar, India
| | - Naveen Kumar
- Department of Chemistry
- U.G.C. Centre of Advance Studies in Chemistry
- Guru Nanak Dev University
- Amritsar, India
| | - Swapandeep Singh Chimni
- Department of Chemistry
- U.G.C. Centre of Advance Studies in Chemistry
- Guru Nanak Dev University
- Amritsar, India
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42
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Flores-Ferrándiz J, Chinchilla R. Solvent-dependent enantioswitching in the Michael addition of α,α-disubstituted aldehydes to maleimides organocatalyzed by mono-N-Boc-protected cyclohexa-1,2-diamines. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.tetasy.2014.06.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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43
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Rana NK, Huang H, Zhao JCG. Highly diastereodivergent synthesis of tetrasubstituted cyclohexanes catalyzed by modularly designed organocatalysts. Angew Chem Int Ed Engl 2014; 53:7619-23. [PMID: 24924475 DOI: 10.1002/anie.201404072] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Indexed: 11/11/2022]
Abstract
A highly diastereodivergent synthesis of tetrasubstituted cyclohexanes has been achieved using modularly designed organocatalysts (MDOs) which are self-assembled in situ from amino acids and cinchona alkaloid derivatives. Diastereodivergence is realized through controlling the stereoselectivity of the individual steps of a tandem Michael/Michael reaction. Up to 8 of the 16 possible stereoisomers have been successfully obtained in high stereoselectivities using MDOs for the tandem reaction and an ensuing epimerization. The method was used in the enantioselective synthesis of the natural products (-)-α- and β-lycoranes.
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Affiliation(s)
- Nirmal K Rana
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249-0698 (USA)
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44
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Rana NK, Huang H, Zhao JCG. Highly Diastereodivergent Synthesis of Tetrasubstituted Cyclohexanes Catalyzed by Modularly Designed Organocatalysts. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201404072] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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45
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Demircan E, Eymur S, Demir AS. Proline–calixarene thiourea host–guest complex catalyzed enantioselective aldol reactions: from nonpolar solvents to the presence of water. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.tetasy.2014.01.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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46
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Xue XS, Yang C, Li X, Cheng JP. Computational Study on the pKa Shifts in Proline Induced by Hydrogen-Bond-Donating Cocatalysts. J Org Chem 2014; 79:1166-73. [DOI: 10.1021/jo402605n] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Xiao-Song Xue
- State Key Laboratory of Elemento-Organic
Chemistry, Collaborative Innovation Center of Chemical Science and
Engineering, Department of Chemistry, Nankai University, Tianjin 300071, China
| | - Chen Yang
- State Key Laboratory of Elemento-Organic
Chemistry, Collaborative Innovation Center of Chemical Science and
Engineering, Department of Chemistry, Nankai University, Tianjin 300071, China
| | - Xin Li
- State Key Laboratory of Elemento-Organic
Chemistry, Collaborative Innovation Center of Chemical Science and
Engineering, Department of Chemistry, Nankai University, Tianjin 300071, China
| | - Jin-Pei Cheng
- State Key Laboratory of Elemento-Organic
Chemistry, Collaborative Innovation Center of Chemical Science and
Engineering, Department of Chemistry, Nankai University, Tianjin 300071, China
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47
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Ramachary DB, Shruthi KS. Asymmetric synthesis of tetrahydroquinolines through supramolecular organocatalysis. Org Biomol Chem 2014; 12:4300-4. [DOI: 10.1039/c4ob00570h] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Functionalized chiral tetrahydroquinolines were synthesized through supramolecular organocatalysis using quinidine-NH-thiourea 3c/l-phenylalanine 4i followed by reductive amination from the simple substrates.
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48
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Tsakos M, Kokotos CG. Primary and secondary amine-(thio)ureas and squaramides and their applications in asymmetric organocatalysis. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.09.080] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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49
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Perera S, Sinha D, Rana NK, Trieu-Do V, Zhao JCG. List–Barbas–Mannich Reaction Catalyzed by Modularly Designed Organocatalysts. J Org Chem 2013; 78:10947-53. [DOI: 10.1021/jo4019304] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sandun Perera
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
| | - Debarshi Sinha
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
| | - Nirmal K. Rana
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
| | - Van Trieu-Do
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
| | - John Cong-Gui Zhao
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
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