1
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Lv XX, Liu N, Chen F, Zhang H, Du ZH, Wang P, Yuan M, Da CS. Highly asymmetric aldol reaction of isatins and ketones catalyzed by chiral bifunctional primary-amine organocatalyst on water. Org Biomol Chem 2023; 21:8695-8701. [PMID: 37861676 DOI: 10.1039/d3ob01227a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2023]
Abstract
Herein, we have reported an environmentally friendly asymmetric aldol reaction between isatins and ketones catalyzed by double-hydrogen-bonded primary amine organocatalysts on water under mild conditions. Enantioenriched 3-hydroxy-2-oxindoles were obtained in high yields (up to 99%) and excellent stereoselectivities (up to 99 : 1 dr and 99% ee) under optimal conditions. Furthermore, the model reaction involving isatin and cyclohexanone was successfully scaled to 10 mmol with no reduction in yield or stereoselectivity. In addition, the catalyst was recovered via simple filtration and was subsequently reused on water, which highlights its good application potential.
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Affiliation(s)
- Xiao-Xiong Lv
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, North 4th Road, Shihezi, Xinjiang 832003, China.
| | - Ning Liu
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, North 4th Road, Shihezi, Xinjiang 832003, China.
| | - Fei Chen
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, North 4th Road, Shihezi, Xinjiang 832003, China.
| | - Hao Zhang
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, North 4th Road, Shihezi, Xinjiang 832003, China.
| | - Zhi-Hong Du
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, North 4th Road, Shihezi, Xinjiang 832003, China.
| | - Pei Wang
- School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
| | - Meng Yuan
- Institute of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Chao Shan Da
- Institute of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
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2
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Faragó T, Remete AM, Szatmári I, Ambrus R, Palkó M. The synthesis of pharmacologically important oxindoles via the asymmetric aldol reaction of isatin and the investigation of the organocatalytic activity of new alicyclic β-amino acid derivatives. RSC Adv 2023; 13:19356-19365. [PMID: 37377868 PMCID: PMC10292165 DOI: 10.1039/d3ra03528j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 06/11/2023] [Indexed: 06/29/2023] Open
Abstract
This work involves the synthesis and subsequent development of a number of novel organocatalysts generated from β-amino acids bearing diendo and diexo norbornene skeletons to improve their catalytic characteristics. The aldol reaction between isatin and acetone selected as the model reaction, was used to test and study enantioselectivities. The potential impact on enantioselectivity control regarding enantiomeric excess (ee%) was probed by varying the reaction parameters, such as additive, solvent, catalyst loading, temperature and substrate range. The corresponding 3-hydroxy-3-alkyl-2-oxindole derivetives were produced by organocatalyst 7 with good enantioselectivity up to 57% ee in the presence of LiOH. Substrate screening was used to investigate a number of substituted isatins with excellent findings up to 99% ee. Another aspect of this effort involved employing high-speed ball mill apparatus to conduct a mechanochemical study to make this model reaction more environmentally benign and sustainable.
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Affiliation(s)
- Tünde Faragó
- Institute of Pharmaceutical Chemistry, University of Szeged Eötvös utca 6 Szeged H-6720 Hungary
| | - Attila M Remete
- Institute of Pharmaceutical Chemistry, University of Szeged Eötvös utca 6 Szeged H-6720 Hungary
| | - István Szatmári
- Institute of Pharmaceutical Chemistry, University of Szeged Eötvös utca 6 Szeged H-6720 Hungary
- Stereochemistry Research Group, Eötvös Loránd Research Network, University of Szeged Eötvös u. 6 H-6720 Szeged Hungary
| | - Rita Ambrus
- Institute of Pharmaceutical Technology and Regulatory Affairs Faculty of Pharmacy, University of Szeged Eötvös utca 6 Szeged H-6720 Hungary
| | - Márta Palkó
- Institute of Pharmaceutical Chemistry, University of Szeged Eötvös utca 6 Szeged H-6720 Hungary
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3
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Deepa, Singh S. Prolinamide and Prolinamide Tagged with Ionic Liquid Intercalated in Bentonite Clay, a Recyclable Catalyst for Asymmetric Aldol Reactions. ChemistrySelect 2023. [DOI: 10.1002/slct.202202379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Deepa
- Department of Chemistry University of Delhi Delhi 110007 India
| | - Surendra Singh
- Department of Chemistry University of Delhi Delhi 110007 India
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4
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Al-Majid AM, Alammari AS, Alshahrani S, Haukka M, Islam MS, Barakat A. Cu(ii)-thiophene-2,5-bis(amino-alcohol) mediated asymmetric Aldol reaction and Domino Knoevenagel Michael cyclization: a new highly efficient Lewis acid catalyst. RSC Adv 2022; 12:6149-6165. [PMID: 35424540 PMCID: PMC8982094 DOI: 10.1039/d2ra00674j] [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: 01/31/2022] [Accepted: 02/09/2022] [Indexed: 11/24/2022] Open
Abstract
The highly efficient Lewis acid-catalytic system Cu(ii)-thiophene-2,5-bis(amino-alcohol) has been developed for enantioselective Aldol reaction of isatin derivatives with ketones. The new catalytic system also proved to be highly enantioselective for the one pot three-component Domino Knoevenagel Michael cyclization reaction of substituted isatin with malononitrile and ethylacetoacetate. The chiral ligand (2S,2′S)-2,2′-((thiophene-2,5-diylbis(methylene))bis(azanediyl))bis(3-phenylpropan-1-ol) (L1) in combination with Cu(OAc)2·H2O employed as a new Lewis acid catalyst, furnished 3-substituted-3-hydroxyindolin-2-ones derivatives (3a–s) in good to excellent yields (81–99%) with high enantioselectivities (up to 96% ee) and spiro[4H-pyran-3,3-oxindole] derivatives (6a–l) in excellent yields (89–99%) with high ee (up to 95%). These aldol products and spiro-oxindoles constitute a core structural motif in a large number of pharmaceutically active molecules and natural products. The highly efficient Lewis acid-catalytic system Cu(ii)-thiophene-2,5-bis(amino-alcohol) has been developed for enantioselective Aldol reaction of isatin derivatives with ketones.![]()
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Affiliation(s)
- Abdullah Mohammed Al-Majid
- Department of Chemistry, College of Science, King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia +966-61-1467-5992
| | - Abdullah Saleh Alammari
- Department of Chemistry, College of Science, King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia +966-61-1467-5992
| | - Saeed Alshahrani
- Department of Chemistry, College of Science, King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia +966-61-1467-5992
| | - Matti Haukka
- Department of Chemistry, University of Jyväskylä P. O. Box 35 FI-40014 Jyväskylä Finland
| | - Mohammad Shahidul Islam
- Department of Chemistry, College of Science, King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia +966-61-1467-5992
| | - Assem Barakat
- Department of Chemistry, College of Science, King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia +966-61-1467-5992
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5
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Juaristi E. Recent developments in next generation (S)-proline-derived chiral organocatalysts. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132143] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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6
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Kumar G, Singh NP, Kumar K. Recent Advancement of Synthesis of Isatins as a Versatile Pharmacophore: A review. Drug Res (Stuttg) 2020; 71:115-121. [PMID: 33296925 DOI: 10.1055/a-1238-2639] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Isatin (1 H-indole-2, 3-Dione) and its derivatives are versatile compounds which acts as a precursor for a large number of pharmacologically active compounds. Therefore isatins have a significant importance in the synthesis of different heterocyclic compounds. Isatins show variety of biological activities. In this review we focus on synthetic methods of isatins and their biological activities such as antimicrobial, anticonvulsant, anti-inflammatory and analgesic activity, antitubercular activity.
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Affiliation(s)
- Gajendra Kumar
- Department of Chemistry, Krishna College, Bijnor (UP), India
| | - Netra Pal Singh
- Department of Chemistry, Deen Dayal Upadhyaya Gorakhpur University, Gorakhpur (UP), India
| | - Kaushal Kumar
- Department of Chemistry, Meerut College, Meerut (UP), India
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7
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Kon K, Kohari Y, Murata M. Tripeptide-Catalyzed Direct Asymmetric Aldol Reaction of Activated Ketones. J SYN ORG CHEM JPN 2020. [DOI: 10.5059/yukigoseikyokaishi.78.1174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Yoshihito Kohari
- Division of Applied Chemistry, Faculty of Engineering, Kitami Institute of Technology
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El Bialy SA, Mansour B, Bayoumi WA, Taman A, Eissa HM. Novel 2-(5-Aryl)thiophen-2-yl)benzimidazoles; Design, Synthesis and In vitro Evaluation Against Cercarial Phase of Schistosoma mansoni. LETT DRUG DES DISCOV 2020. [DOI: 10.2174/1570180817999200523181211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Literature survey has pointed out that Benzimidazoles represent an interesting
class of anthelmintics, of which several potent members were developed.
Objective:
Benzimidazoles hybridized with pharmacophoric moieties possessing anthelmintic activity
were designed, synthesized to be evaluated against cercaria.
Methods:
Structural modification was achieved through 2- and 5-positions. Moreover, an in vitro
cercarial assay was adopted to evaluate target compounds.
Results and Discussion:
Biological screening revealed that compound 3h showed significant activity
with a survival index of 35% at a 100 μg/mL concentration. Whereas, compounds 3a and 3c
showed moderate activity, the rest of the tested compounds exhibited low activity.
Conclusion:
The current study evidenced that the new hybrids "benzimidazole-thiophen-aryl" are
successful as cercacidal agents. Further studies of this novel tri-ring system are suggested on adult
worms of S. mansoni.
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Affiliation(s)
- Serry Atta El Bialy
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Basem Mansour
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Waleed Abdelhakeem Bayoumi
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Amira Taman
- Department of Medical Parasitology, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Hassan Mohammed Eissa
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
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9
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Gambacorta G, Apperley DC, Baxendale IR. A One-Pot Divergent Sequence to Pyrazole and Quinoline Derivatives. Molecules 2020; 25:molecules25092160. [PMID: 32380725 PMCID: PMC7249113 DOI: 10.3390/molecules25092160] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 04/23/2020] [Accepted: 04/30/2020] [Indexed: 11/16/2022] Open
Abstract
The hydroxy-pyrazole and 3-hydroxy-oxindole motifs have been utilised in several pharma and agrochemical leads but are distinctly underrepresented in the scientific literature due to the limited routes of preparation. We have developed a one-pot procedure for their synthesis starting from simple isatins. The method employs cheap and easy-to-handle building blocks and allows easy isolation.
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10
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Chandran R, Prabhakaran SM, Kumar V, Thakar SR, Tiwari KN. Approaches towards 3‐Substituted‐3‐hydroxyoxindole and Spirooxindole‐Pyran Derivatives in a Reaction of Isatin with Acetylacetone in Aqueous Media. ChemistrySelect 2019. [DOI: 10.1002/slct.201903301] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- R. Chandran
- Department of Medicinal ChemistryNational Institute of Pharmaceutical Education and Research (NIPER)Raebareli Transit Campus Bijnour-Sisendi Road Lucknow – 226002 INDIA
| | - S. M. Prabhakaran
- Department of Medicinal ChemistryNational Institute of Pharmaceutical Education and Research (NIPER)Raebareli Transit Campus Bijnour-Sisendi Road Lucknow – 226002 INDIA
| | - Vaneet Kumar
- Department of Medicinal ChemistryNational Institute of Pharmaceutical Education and Research (NIPER)Raebareli Transit Campus Bijnour-Sisendi Road Lucknow – 226002 INDIA
| | - Snehal Rajendra Thakar
- Department of Medicinal ChemistryNational Institute of Pharmaceutical Education and Research (NIPER)Raebareli Transit Campus Bijnour-Sisendi Road Lucknow – 226002 INDIA
| | - Keshri Nath Tiwari
- Department of Medicinal ChemistryNational Institute of Pharmaceutical Education and Research (NIPER)Raebareli Transit Campus Bijnour-Sisendi Road Lucknow – 226002 INDIA
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11
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Abstract
Introduction:The popularity of chitosan is increasing among the researchers due to its environment friendly nature, high activity and easy approachability. Chitosan based catalysts are not only the most active and selective in catalytic reaction, but their “green” accessibility also makes them promising in organic catalysis. Chitosan is commonly extracted from chitin by alkaline deacetylation and it is the second abundant biopolymer in nature after cellulose. Chitosan based catalysts are advantageous by means of non-metallic activation as it involves small organic molecules. The robustness, nontoxicity, the lack of metal leaching possibility, inertness towards moisture and oxygen, easy handling and storage are the main advantages of organocatalysts. Traditional drawbacks associated with the metal-based heterogeneous catalysts, like longer reaction times during any synthesis, metal-leaching after every reaction and structural instability of the catalyst for prolonged recycling experiments are also very negligible for chitosan based catalysts. Besides, these catalysts can contribute more in catalysis due to their reusability and these special features increase their demand as the functionalized and profitable catalysts.Objective:The thorough description about the preparation of organocatalysts from chitosan and their uniqueness and novel activities in various famous reactions includes as the main aim of this review. Reusable and recycle nature of chitosan based organocatalysts gain the advantages over traditional and conventional catalyst which is further discussed over here.Methods and Discussions:In this article only those reactions are discussed where chitosan has been used both as support in heterogeneous catalysts or used as a catalyst itself without any co-catalyst for some reactions. Owing to its high biodegradability, nontoxicity, and antimicrobial properties, chitosan is widely-used as a green and sustainable polymeric catalyst in vast number of the reactions. Most of the preparations of catalyst have been achieved by exploring the complexation properties of chitosan with metal ions in heterogeneous molecular catalysis. Organocatalysis with chitosan is primarily discussed for carbon-carbon bond-forming reactions, carbon dioxide fixation through cyclo- addition reaction, condensation reaction and fine chemical synthesis reactions. Furthermore, its application as an enantioselective catalyst is also considered here for the chiral, helical organization of the chitosan skeleton. Moreover, another advantage of this polymeric catalyst is its easy recovery and reusability for several times under solvent-free conditions which is also explored in the current article.Conclusion:Important organocatalyzed reactions with either native chitosan or functionalized chitosan as catalysts have attracted great attention in the recent past. Also, chitosan has been widely used as a very promising support for the immobilization of catalytic metals for many reactions. In this review, various reactions have been discussed which show the potentiality of chitosan as catalyst or catalyst support.
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Affiliation(s)
- Dipika Pan
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah-711103, India
| | - Jhuma Ganguly
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah-711103, India
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12
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Han J, Zhang JL, Zhang WQ, Gao Z, Xu LW, Jian Y. “On Water” Catalytic Aldol Reaction between Isatins and Acetophenones: Interfacial Hydrogen Bonding and Enamine Mechanism. J Org Chem 2019; 84:7642-7651. [DOI: 10.1021/acs.joc.9b00441] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jinsong Han
- Key Laboratory of Applied Surface and Colloid Chemistry, MOE, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, P. R. China
| | - Jin-Lei Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, MOE, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, P. R. China
| | - Wei-Qiang Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, MOE, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, P. R. China
| | - Ziwei Gao
- Key Laboratory of Applied Surface and Colloid Chemistry, MOE, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, P. R. China
| | - Li-Wen Xu
- Key Laboratory of Applied Surface and Colloid Chemistry, MOE, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, P. R. China
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 310012, P. R. China
| | - Yajun Jian
- Key Laboratory of Applied Surface and Colloid Chemistry, MOE, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, P. R. China
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13
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Affiliation(s)
| | - Deepa
- Department of ChemistryUniversity of Delhi Delhi 110007 India
| | - Surendra Singh
- Department of ChemistryUniversity of Delhi Delhi 110007 India
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14
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Cruz-Hernández C, Landeros JM, Juaristi E. Multifunctional phosphoramide-(S)-prolinamide derivatives as efficient organocatalysts in asymmetric aldol and Michael reactions. NEW J CHEM 2019. [DOI: 10.1039/c9nj00300b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Knowledge accumulated in the field of organocatalysis led to the design and synthesis of three novel and efficient organocatalysts for the stereoselective aldol and Michael reactions in the presence of water.
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Affiliation(s)
- Carlos Cruz-Hernández
- Departamento de Química
- Centro de Investigación y de Estudios Avanzados
- Avenida IPN # 2508
- 07360 Ciudad de México
- Mexico
| | - José M. Landeros
- Departamento de Química
- Centro de Investigación y de Estudios Avanzados
- Avenida IPN # 2508
- 07360 Ciudad de México
- Mexico
| | - Eusebio Juaristi
- Departamento de Química
- Centro de Investigación y de Estudios Avanzados
- Avenida IPN # 2508
- 07360 Ciudad de México
- Mexico
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15
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Wang J, Deng ZX, Wang CM, Xia PJ, Xiao JA, Xiang HY, Chen XQ, Yang H. Unraveling and Manipulating the Stereospecific Retro-Aldol Reaction in the Organocatalytic Asymmetric Aldol Reaction of Isatin and Cyclohexanone. Org Lett 2018; 20:7535-7538. [PMID: 30411899 DOI: 10.1021/acs.orglett.8b03292] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
An l-pyroglutamic acid-derived bifunctional organocatalyst was designed and applied in an organocatalytic asymmetric direct aldol reaction between isatins and cyclohexanone, in which an erosion of enantiomeric excess of aldol adduct was unexpectedly observed. Through closely monitoring the reaction and performing extensive control experiments, it was determined that the erosion of ee was attributed to a rare stereospecific retro-aldol process. Moreover, effective manipulation of the retro-aldol process by tuning the use of starting materials was ultimately accomplished, leading to evidently upgraded enantioselectivity and functional group tolerance. This study demonstrates the impact of the hidden reaction pathway on the enantioselectivity in asymmetric transformation.
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Affiliation(s)
- Jing Wang
- College of Chemistry and Chemical Engineering , Central South University , Changsha 410083 , P. R. China
| | - Zhi-Xiong Deng
- College of Chemistry and Chemical Engineering , Central South University , Changsha 410083 , P. R. China
| | - Chao-Ming Wang
- College of Chemistry and Chemical Engineering , Central South University , Changsha 410083 , P. R. China
| | - Peng-Ju Xia
- College of Chemistry and Chemical Engineering , Central South University , Changsha 410083 , P. R. China
| | - Jun-An Xiao
- College of Chemistry and Materials Science , Guangxi Teachers Education University , Nanning 530001 , Guangxi , P. R. China
| | - Hao-Yue Xiang
- College of Chemistry and Chemical Engineering , Central South University , Changsha 410083 , P. R. China
| | - Xiao-Qing Chen
- College of Chemistry and Chemical Engineering , Central South University , Changsha 410083 , P. R. China.,Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety , Central South University , Changsha 410083 , P. R. China
| | - Hua Yang
- College of Chemistry and Chemical Engineering , Central South University , Changsha 410083 , P. R. China.,Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety , Central South University , Changsha 410083 , P. R. China
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16
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Brandão P, Burke AJ. Recent advances in the asymmetric catalytic synthesis of chiral 3-hydroxy and 3-aminooxindoles and derivatives: Medicinally relevant compounds. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.06.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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17
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Wang LM, Zhao MJ, Chen Z, Mu HW, Jin Y. Urea derivative catalyzed enantioselective aldol reaction of isatins with ketones. Chirality 2018; 30:1005-1011. [PMID: 29856893 DOI: 10.1002/chir.22977] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 03/22/2018] [Accepted: 04/23/2018] [Indexed: 11/11/2022]
Abstract
Urea derivative has been used to catalyze the asymmetric aldol reaction of isatins with ketones. The resulting 3-alkyl-3-hydroxy-indolin-2-ones products were obtained in good yields (70%-94%) with high enantioselectivities (up to 87%ee).
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Affiliation(s)
- Li Ming Wang
- Department of Pharmacy, Jilin Medical University, Jilin, China
| | - Mei Jun Zhao
- Department of Pharmacy, Jilin Medical University, Jilin, China
| | - Zhe Chen
- Department of Pharmacy, Jilin Medical University, Jilin, China
| | - Hong Wen Mu
- Department of Pharmacy, Jilin Medical University, Jilin, China
| | - Ying Jin
- Department of Pharmacy, Jilin Medical University, Jilin, China
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18
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Fathy U, Gouhar RS, Awad HM, Abdel-Aziz HA. Synthesis, Single Crystal X-Ray, and Anticancer Activity of Some New Thiophene and 1,3-Thiazolidine Derivatives. RUSS J GEN CHEM+ 2018. [DOI: 10.1134/s1070363217120374] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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19
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Laina-Martín V, Humbrías-Martín J, Fernández-Salas JA, Alemán J. Asymmetric vinylogous Mukaiyama aldol reaction of isatins under bifunctional organocatalysis: enantioselective synthesis of substituted 3-hydroxy-2-oxindoles. Chem Commun (Camb) 2018; 54:2781-2784. [DOI: 10.1039/c8cc00759d] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A highly enantioselective organocatalytic vinylogous Mukaiyama aldol reaction of silyloxy dienes and isatins under bifunctional organocatalysis is presented.
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Affiliation(s)
- Víctor Laina-Martín
- Departamento de Química Orgánica (Módulo 1)
- Facultad de Ciencias
- Universidad Autónoma de Madrid
- Madrid 28049
- Spain
| | - Jorge Humbrías-Martín
- Departamento de Química Orgánica (Módulo 1)
- Facultad de Ciencias
- Universidad Autónoma de Madrid
- Madrid 28049
- Spain
| | - José A. Fernández-Salas
- Departamento de Química Orgánica (Módulo 1)
- Facultad de Ciencias
- Universidad Autónoma de Madrid
- Madrid 28049
- Spain
| | - José Alemán
- Departamento de Química Orgánica (Módulo 1)
- Facultad de Ciencias
- Universidad Autónoma de Madrid
- Madrid 28049
- Spain
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20
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Yamashita Y, Yasukawa T, Yoo WJ, Kitanosono T, Kobayashi S. Catalytic enantioselective aldol reactions. Chem Soc Rev 2018; 47:4388-4480. [DOI: 10.1039/c7cs00824d] [Citation(s) in RCA: 165] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Recent developments in catalytic asymmetric aldol reactions have been summarized.
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Affiliation(s)
- Yasuhiro Yamashita
- Department of Chemistry
- School of Science
- The University of Tokyo
- Bunkyo-ku
- Japan
| | - Tomohiro Yasukawa
- Department of Chemistry
- School of Science
- The University of Tokyo
- Bunkyo-ku
- Japan
| | - Woo-Jin Yoo
- Department of Chemistry
- School of Science
- The University of Tokyo
- Bunkyo-ku
- Japan
| | - Taku Kitanosono
- Department of Chemistry
- School of Science
- The University of Tokyo
- Bunkyo-ku
- Japan
| | - Shū Kobayashi
- Department of Chemistry
- School of Science
- The University of Tokyo
- Bunkyo-ku
- Japan
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21
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Chowhan LR, Reddy MS, Kumar NS. An efficient and rapid synthesis of 3-hydroxy-3-alkyl-2-oxindoles via Zn-mediated barbier-type reaction under aqueous conditions. J CHEM SCI 2017. [DOI: 10.1007/s12039-017-1329-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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22
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23
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2-Azanorbornane-based amine organocatalyst for enantioselective aldol reaction of isatins with ketones. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.tetasy.2016.08.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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24
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Kimura J, Subba Reddy UV, Kohari Y, Seki C, Mawatari Y, Uwai K, Okuyama Y, Kwon E, Tokiwa M, Takeshita M, Iwasa T, Nakano H. Simple Primary Amino Amide Organocatalyst for Enantioselective Aldol Reactions of Isatins with Ketones. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600414] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jo Kimura
- Department of Bioengineering; Graduate School of Engineering; Muroran Institute of Technology; 27-1 Mizumoto 050-8585 Muroran Japan
| | - Ummareddy Venkata Subba Reddy
- Department of Bioengineering; Graduate School of Engineering; Muroran Institute of Technology; 27-1 Mizumoto 050-8585 Muroran Japan
| | - Yoshihito Kohari
- Department of Bioengineering; Graduate School of Engineering; Muroran Institute of Technology; 27-1 Mizumoto 050-8585 Muroran Japan
| | - Chigusa Seki
- Department of Bioengineering; Graduate School of Engineering; Muroran Institute of Technology; 27-1 Mizumoto 050-8585 Muroran Japan
| | - Yasuteru Mawatari
- Department of Bioengineering; Graduate School of Engineering; Muroran Institute of Technology; 27-1 Mizumoto 050-8585 Muroran Japan
| | - Koji Uwai
- Department of Bioengineering; Graduate School of Engineering; Muroran Institute of Technology; 27-1 Mizumoto 050-8585 Muroran Japan
| | - Yuko Okuyama
- Tohoku Pharmaceutical University; 4-4-1 Komatsushima, Aoba-ku 981-8585 Sendai Japan
| | - Eunsang Kwon
- Research and Analytical Center for Giant Molecules; Graduate School of Sciences; Tohoku University; 6-3 Aoba, Aramaki, Aoba-ku 980-8578 Sendai Japan
| | - Michio Tokiwa
- Tokiwakai Group; 62 Numajiri Tsuduri-chou Uchigo 973-8053 Iwaki Japan
| | | | - Tatsuo Iwasa
- Division of Engineering for Composite Functions; Graduate School of Engineering; Muroran Institute of Technology; 27-1 Mizumoto 050-8585 Muroran Japan
| | - Hiroto Nakano
- Department of Bioengineering; Graduate School of Engineering; Muroran Institute of Technology; 27-1 Mizumoto 050-8585 Muroran Japan
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25
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Yuan R, Zhao D, Zhang LY, Pan X, Yang Y, Wang P, Li HF, Da CS. Isopropylmagnesium chloride-promoted unilateral addition of Grignard reagents to β-diketones: one-pot syntheses of β-tertiary hydroxyl ketones or 3-substituted cyclic-2-enones. Org Biomol Chem 2016; 14:724-728. [PMID: 26575990 DOI: 10.1039/c5ob02072g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The regioselective unilateral additions of Grignard reagents to acyclic or cyclic β-diketones were effectively promoted by sub-stoichiometric amounts of i-PrMgCl to afford β-tertiary hydroxyl ketones or 3-substituted cyclic-2-enones, respectively. Also, the addition of Grignard reagents to acyclic β-diketones followed by a reaction with cyclic β-diketones in a one-pot process was put forward. The reaction mechanism was discussed in detail to explain the high regioselectivity via chemical experiments, hydrogen-deuterium exchange and mass spectrometry.
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Affiliation(s)
- Rui Yuan
- Institute of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China.
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26
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Bai M, You Y, Chen YZ, Xiang GY, Xu XY, Zhang XM, Yuan WC. An unprecedented protocol for the synthesis of 3-hydroxy-3-phenacyloxindole derivatives with indolin-2-ones and α-substituted ketones. Org Biomol Chem 2016; 14:1395-401. [DOI: 10.1039/c5ob02391b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A reaction between indolin-2-ones and α-substituted ketones was developed and a wide range of 3-hydroxy-3-phenacyloxindoles were obtained in good yield.
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Affiliation(s)
- Mei Bai
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Yong You
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | | | | | - Xiao-Ying Xu
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Xiao-Mei Zhang
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Wei-Cheng Yuan
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
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27
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Kumar TP, Manjula N, Katragunta K. Asymmetric aldol reactions of isatins catalyzed by phthalimido-prolinamide. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2015.09.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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28
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H2O-mediated isatin spiro-epoxide ring opening with NaCN: Synthesis of novel 3-tetrazolylmethyl-3-hydroxy-oxindole hybrids and their anticancer evaluation. Eur J Med Chem 2015; 104:11-24. [DOI: 10.1016/j.ejmech.2015.09.025] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Revised: 09/14/2015] [Accepted: 09/15/2015] [Indexed: 01/11/2023]
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29
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Nikoofar K, Dizgarani SM. A concise synthesis of isatin-based aromatic compounds in water as the reaction medium resulting in an approach to green chemistry. MONATSHEFTE FUR CHEMIE 2015. [DOI: 10.1007/s00706-015-1439-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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30
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Wang J, Liu Q, Hao Q, Sun Y, Luo Y, Yang H. EnantioselectiveAldol Reaction Between Isatins and Cyclohexanone Catalyzed by Amino Acid Sulphonamides. Chirality 2015; 27:314-9. [DOI: 10.1002/chir.22433] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 12/23/2014] [Accepted: 01/16/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Jun Wang
- College of Chemistry and Chemical Engineering; Central South University; Changsha P.R. China
| | - Qi Liu
- College of Chemistry and Chemical Engineering; Central South University; Changsha P.R. China
| | - Qing Hao
- College of Chemistry and Chemical Engineering; Central South University; Changsha P.R. China
| | - Yanhua Sun
- College of Chemistry and Chemical Engineering; Central South University; Changsha P.R. China
| | - Yiming Luo
- College of Chemistry and Chemical Engineering; Central South University; Changsha P.R. China
| | - Hua Yang
- College of Chemistry and Chemical Engineering; Central South University; Changsha P.R. China
- Collaborative Innovation Center of Resource-conserving & Environment-friendly Society and Ecological Civilization; Changsha P.R. China
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31
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Huang XR, Liu Q, Wang J, Xiao JA, Yang H. Solvent-effects tuning the catalytic reactivity of prolinamides in asymmetric aldol reactions. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.tetasy.2014.10.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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32
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Liu ZQ, Xiang ZW, Shen Z, Wu Q, Lin XF. Enzymatic enantioselective aldol reactions of isatin derivatives with cyclic ketones under solvent-free conditions. Biochimie 2014; 101:156-60. [DOI: 10.1016/j.biochi.2014.01.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Accepted: 01/07/2014] [Indexed: 10/25/2022]
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33
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Zhao H, Meng W, Yang Z, Tian T, Sheng Z, Li H, Song X, Zhang Y, Yang S, Li B. Organocatalytic Stereoselective Synthesis of 3-Alkyl-3-hydroxy-2-oxindoles Catalyzed by Novel Water-compatible Axially Unfixed Biaryl-based Bifunctional Organocatalysts. CHINESE J CHEM 2014. [DOI: 10.1002/cjoc.201400166] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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34
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Abbaraju S, Zhao JCG. Asymmetric Aldol Reaction of 3-Acetyl-2 H-chromen-2-ones and Isatins Catalyzed by a Bifunctional Quinidine Urea Catalyst. Adv Synth Catal 2014; 356:237-241. [PMID: 24839435 DOI: 10.1002/adsc.201300623] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The asymmetric aldol reaction of 3-acetyl-2H-chromen-2-ones and isatins has been realized by using a bifunctional quinidine-derived urea as the catalyst. The corresponding 3-hydroxyoxindole derivatives containing a 2H-chromen-2-one moiety were obtained in good yields and high enantioselectivities. When (Z)-ethyl 2-benzylideneacetoacetate was used as the substrate, a mixture of two diastereomers (both Z and E) was obtained due to the isomerization of the double bond under the reaction conditions.
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Affiliation(s)
- Santhi Abbaraju
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698.
| | - John Cong-Gui Zhao
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698.
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35
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Mlynarski J, Baś S. Catalytic asymmetric aldol reactions in aqueous media – a 5 year update. Chem Soc Rev 2014; 43:577-87. [DOI: 10.1039/c3cs60202h] [Citation(s) in RCA: 147] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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36
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Li L, Gou S, Liu F. Highly stereoselective direct aldol reactions catalyzed by a bifunctional chiral diamine. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.tetasy.2013.11.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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37
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38
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Yan T, Wang X, Sun H, Liu J, Xie Y. Facile creation of 3-substituted-3-hydroxy-2-oxindoles by arginine-catalyzed aldol reactions of α,β-unsaturated ketones with isatins. Molecules 2013; 18:14505-18. [PMID: 24287987 PMCID: PMC6270100 DOI: 10.3390/molecules181214505] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Revised: 11/15/2013] [Accepted: 11/19/2013] [Indexed: 02/05/2023] Open
Abstract
An efficient approach for the synthesis of 3-substituted-3-hydroxy-2-oxindoles has been achieved via an aldol reaction of α,β-unsaturated ketones and isatins using arginine as an organocatalyst. A range of 3-substituted-3-hydroxy-2-oxindoles were obtained in moderate to high (up to 99%) yields. These 3-substituted-3-hydroxy-2-oxindoles with an additional enone moiety provide an opportunity for further elaboration of the products and for potentially interesting biological activities. In addition, the formation of 3-substituted-3-hydroxy-2-oxindole 3a was confirmed by X-ray crystallography. The possible reaction mechanism reveals that the reaction proceeds via a double action process.
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Affiliation(s)
- Tingting Yan
- State Key Laboratory of Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, China; E-Mails: (T.Y.); (H.S.)
| | - Xiaoyan Wang
- Analytical & Testing Center, Sichuan University, Chengdu 610064, China; E-Mail:
| | - Hongbao Sun
- State Key Laboratory of Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, China; E-Mails: (T.Y.); (H.S.)
| | - Jie Liu
- State Key Laboratory of Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, China; E-Mails: (T.Y.); (H.S.)
| | - Yongmei Xie
- State Key Laboratory of Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, China; E-Mails: (T.Y.); (H.S.)
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39
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Pearson AJ, Panda S, Bunge SD. Synthesis of a Potential Intermediate for TMC-95A via an Organocatalyzed Aldol Reaction. J Org Chem 2013; 78:9921-8. [DOI: 10.1021/jo4017315] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Anthony J. Pearson
- Department
of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Santanu Panda
- Department
of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Scott D. Bunge
- Department
of Chemistry, Kent State University, Kent, Ohio 44242, United States
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40
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Scheffler U, Mahrwald R. Recent Advances in Organocatalytic Methods for Asymmetric CC Bond Formation. Chemistry 2013; 19:14346-96. [DOI: 10.1002/chem.201301996] [Citation(s) in RCA: 178] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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41
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Tanimura Y, Yasunaga K, Ishimaru K. Electrostatic Repulsion and Hydrogen-Bonding Interactions in a SimpleN-Aryl-L-valinamide Organocatalyst Control the Stereoselectivity in Asymmetric Aldol Reactions. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301138] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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42
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Becerra D, Insuasty B, Cobo J, Glidewell C. 3,3'-[(1RS,3SR)-2-oxocyclohexane-1,3-diyl]bis[(3RS,3'SR)-3-hydroxyindolin-2-one] dihydrate: organic layers of R2(2)(8), R2(2)(16) and R6(6)(40) rings linked by tetrameric water aggregates. Acta Crystallogr C 2013; 69:1081-4. [PMID: 24005527 DOI: 10.1107/s0108270113020908] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Accepted: 07/26/2013] [Indexed: 11/11/2022] Open
Abstract
The organic component of the title compound, C22H20N2O5·2H2O, exhibits approximate but noncrystallographic mirror symmetry. The molecules of the organic component are linked by a combination of one O-H...O hydrogen bond and two N-H···O hydrogen bonds to form sheets containing R2(2)(8), R2(2)(16) and R6(6)(40) rings. These sheets are linked into a continuous three-dimensional framework structure by cyclic centrosymmetric R4(2)(8) water tetramers. Comparisons are made with some simpler analogues.
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Affiliation(s)
- Diana Becerra
- Departamento de Química, Universidad de Valle, AA 25360 Cali, Colombia
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43
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Suh CW, Chang CW, Choi KW, Lim YJ, Kim DY. Enantioselective decarboxylative aldol addition of β-ketoacids to isatins catalyzed by binaphthyl-modified organocatalyst. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.04.132] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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44
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Kumar A, Chimni SS. Organocatalytic Asymmetric Direct Aldol Reaction of Pyruvic Aldehyde Dimethyl Acetal with Isatin Derivatives. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300411] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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45
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Organocatalyzed direct asymmetric aldol reaction of isatins in water: low catalyst loading in command. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.04.044] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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46
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Mohammadi S, Heiran R, Herrera RP, Marqués-López E. Isatin as a Strategic Motif for Asymmetric Catalysis. ChemCatChem 2013. [DOI: 10.1002/cctc.201300050] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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47
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Pakravan P, Kashanian S, Khodaei MM, Harding FJ. Biochemical and pharmacological characterization of isatin and its derivatives: from structure to activity. Pharmacol Rep 2013; 65:313-35. [DOI: 10.1016/s1734-1140(13)71007-7] [Citation(s) in RCA: 117] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2012] [Revised: 11/26/2012] [Indexed: 10/25/2022]
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48
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Yanagisawa A, Yoshida K. Development of Asymmetric Reactions Catalyzed by Chiral Organotin-Alkoxide Reagents. CHEM REC 2013; 13:117-27. [DOI: 10.1002/tcr.201200019] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Indexed: 11/09/2022]
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49
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Duan Z, Han J, Qian P, Zhang Z, Wang Y, Pan Y. Enantioselective synthesis of 3-hydroxy oxindoles by ytterbium-catalysed decarboxylative addition of β-ketoacids to isatins. Org Biomol Chem 2013; 11:6456-9. [DOI: 10.1039/c3ob41460d] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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50
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Heravi MM, Asadi S. Recent applications of organocatalysts in asymmetric aldol reactions. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.tetasy.2012.10.002] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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