201
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Yao W, Chen M, Liu X, Jiang R, Zhang S, Chen W. Ferrocene as a scaffold for effective bifunctional amine–thiourea organocatalysts. Catal Sci Technol 2014. [DOI: 10.1039/c4cy00199k] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This work demonstrates that ferrocene could be an excellent scaffold for chiral organocatalysts.
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Affiliation(s)
- Wei Yao
- School of Pharmacy
- Fourth Military Medical University
- Xi'an, PR China
| | - Ming Chen
- School of Pharmacy
- Fourth Military Medical University
- Xi'an, PR China
| | - Xueying Liu
- School of Pharmacy
- Fourth Military Medical University
- Xi'an, PR China
| | - Ru Jiang
- School of Pharmacy
- Fourth Military Medical University
- Xi'an, PR China
| | - Shengyong Zhang
- School of Pharmacy
- Fourth Military Medical University
- Xi'an, PR China
| | - Weiping Chen
- School of Pharmacy
- Fourth Military Medical University
- Xi'an, PR China
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202
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Zhang J, Yu H, Zhang C, He C, Duan C. Cerium-based M4L4 tetrahedrons containing hydrogen bond groups as functional molecular flasks for selective reaction prompting. NEW J CHEM 2014. [DOI: 10.1039/c4nj00062e] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Metal–organic tetrahedrons with abundant hydrogen bond groups work as “molecular flasks” to prompt Knoevenagel condensation and cyanosilylation reactions.
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Affiliation(s)
- Jing Zhang
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian, China
| | - Hao Yu
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian, China
| | - Caixia Zhang
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian, China
| | - Cheng He
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian, China
| | - Chunying Duan
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian, China
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203
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Alcaine A, Marqués-López E, Herrera RP. Synthesis of interesting β-nitrohydrazides through a thiourea organocatalysed aza-Michael addition. RSC Adv 2014. [DOI: 10.1039/c3ra47925k] [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] Open
Abstract
The synthesis of interesting β-nitrohydrazides, as the target product of our reaction, is reached for the first time under organocatalytic enantioselective conditions.
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Affiliation(s)
- Ana Alcaine
- Laboratorio de Síntesis Asimétrica
- Departamento de Química Orgánica
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)
- CSIC-Universidad de Zaragoza
- E-50009 Zaragoza, Spain
| | - Eugenia Marqués-López
- Laboratorio de Síntesis Asimétrica
- Departamento de Química Orgánica
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)
- CSIC-Universidad de Zaragoza
- E-50009 Zaragoza, Spain
| | - Raquel P. Herrera
- Laboratorio de Síntesis Asimétrica
- Departamento de Química Orgánica
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)
- CSIC-Universidad de Zaragoza
- E-50009 Zaragoza, Spain
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204
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Odagi M, Furukori K, Watanabe T, Nagasawa K. Asymmetric α‐Hydroxylation of Tetralone‐Derived β‐Ketoesters by Using a Guanidine–Urea Bifunctional Organocatalyst in the Presence of Cumene Hydroperoxide. Chemistry 2013; 19:16740-5. [DOI: 10.1002/chem.201303006] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Revised: 09/10/2013] [Indexed: 11/07/2022]
Affiliation(s)
- Minami Odagi
- Department of Biotechnology and Life Science, Faculty of Engineering, Tokyo University of Agriculture and Technology, 2‐24‐16, Naka‐cho, Koganei, Tokyo 184‐8588 (Japan), Fax: (+81) 42‐388‐7295
| | - Kota Furukori
- Department of Biotechnology and Life Science, Faculty of Engineering, Tokyo University of Agriculture and Technology, 2‐24‐16, Naka‐cho, Koganei, Tokyo 184‐8588 (Japan), Fax: (+81) 42‐388‐7295
| | - Tatsuya Watanabe
- Department of Biotechnology and Life Science, Faculty of Engineering, Tokyo University of Agriculture and Technology, 2‐24‐16, Naka‐cho, Koganei, Tokyo 184‐8588 (Japan), Fax: (+81) 42‐388‐7295
| | - Kazuo Nagasawa
- Department of Biotechnology and Life Science, Faculty of Engineering, Tokyo University of Agriculture and Technology, 2‐24‐16, Naka‐cho, Koganei, Tokyo 184‐8588 (Japan), Fax: (+81) 42‐388‐7295
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205
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Diosdado S, Etxabe J, Izquierdo J, Landa A, Mielgo A, Olaizola I, López R, Palomo C. Catalytic Enantioselective Synthesis of Tertiary Thiols From 5H-Thiazol-4-ones and Nitroolefins: Bifunctional Ureidopeptide-Based Brønsted Base Catalysis. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201305644] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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206
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Diosdado S, Etxabe J, Izquierdo J, Landa A, Mielgo A, Olaizola I, López R, Palomo C. Catalytic enantioselective synthesis of tertiary thiols from 5H-thiazol-4-ones and nitroolefins: bifunctional ureidopeptide-based Brønsted base catalysis. Angew Chem Int Ed Engl 2013; 52:11846-51. [PMID: 24105886 DOI: 10.1002/anie.201305644] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Indexed: 01/09/2023]
Affiliation(s)
- Saioa Diosdado
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián (Spain)
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207
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Lee YS, Alam MM, Keri RS. Enantioselective Reactions ofN-Acyliminium Ions Using Chiral Organocatalysts. Chem Asian J 2013; 8:2906-19. [DOI: 10.1002/asia.201300814] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Indexed: 11/06/2022]
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208
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Geng Y, Kumar A, Faidallah HM, Albar HA, Mhkalid IA, Schmidt RR. Kooperative Katalyse bei der Glycosidierung mitO-Glycosyltrichloracetimidaten als Glycosyldonoren. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201302158] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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209
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Geng Y, Kumar A, Faidallah HM, Albar HA, Mhkalid IA, Schmidt RR. Cooperative Catalysis in Glycosidation Reactions withO-Glycosyl Trichloroacetimidates as Glycosyl Donors. Angew Chem Int Ed Engl 2013; 52:10089-92. [DOI: 10.1002/anie.201302158] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Revised: 05/14/2013] [Indexed: 11/06/2022]
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210
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Kramer CS, Bräse S. Thiourea-catalyzed Diels-Alder reaction of a naphthoquinone monoketal dienophile. Beilstein J Org Chem 2013; 9:1414-8. [PMID: 23946836 PMCID: PMC3740680 DOI: 10.3762/bjoc.9.158] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2013] [Accepted: 06/20/2013] [Indexed: 11/23/2022] Open
Abstract
A variety of organocatalysts were screened for the catalysis of the naphthoquinone monoketal Diels-Alder reaction. In this study we found that Schreiner's thiourea catalyst 10 and Jacobson's thiourea catalyst 12 facilitate the cycloaddition of the sterically hindered naphthoquinone monoketal dienophile 3 with diene 4. The use of thiourea catalysis allowed for the first time the highly selective synthesis of the exo-product 2a in up to 63% yield. In this reaction a new quaternary center was built. The so formed cycloaddition product 2a represents the ABC tricycle of beticolin 0 (1) and is also a valuable model substrate for the total synthesis of related natural products.
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Affiliation(s)
- Carsten S Kramer
- Karlsruhe Institute of Technology (KIT), Institute of Organic Chemistry, Fritz-Haber-Weg 6, D-76131 Karlsruhe; Tel: (+49) 721608-48581
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211
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Xue XS, Li X, Yu A, Yang C, Song C, Cheng JP. Mechanism and Selectivity of Bioinspired Cinchona Alkaloid Derivatives Catalyzed Asymmetric Olefin Isomerization: A Computational Study. J Am Chem Soc 2013; 135:7462-73. [DOI: 10.1021/ja309133z] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Xiao-Song Xue
- State
Key Laboratory of Elemento-Organic Chemistry, §Computational Center of Molecular
Science, and ‡Central Laboratory, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xin Li
- State
Key Laboratory of Elemento-Organic Chemistry, §Computational Center of Molecular
Science, and ‡Central Laboratory, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Ao Yu
- State
Key Laboratory of Elemento-Organic Chemistry, §Computational Center of Molecular
Science, and ‡Central Laboratory, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Chen Yang
- State
Key Laboratory of Elemento-Organic Chemistry, §Computational Center of Molecular
Science, and ‡Central Laboratory, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Chan Song
- State
Key Laboratory of Elemento-Organic Chemistry, §Computational Center of Molecular
Science, and ‡Central Laboratory, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Jin-Pei Cheng
- State
Key Laboratory of Elemento-Organic Chemistry, §Computational Center of Molecular
Science, and ‡Central Laboratory, College of Chemistry, Nankai University, Tianjin 300071, China
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212
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213
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Kniep F, Jungbauer SH, Zhang Q, Walter SM, Schindler S, Schnapperelle I, Herdtweck E, Huber SM. Organocatalysis by Neutral Multidentate Halogen-Bond Donors. Angew Chem Int Ed Engl 2013; 52:7028-32. [DOI: 10.1002/anie.201301351] [Citation(s) in RCA: 251] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Revised: 03/28/2013] [Indexed: 11/06/2022]
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214
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Neumann M, Zeitler K. A Cooperative Hydrogen-Bond-Promoted Organophotoredox Catalysis Strategy for Highly Diastereoselective, Reductive Enone Cyclization. Chemistry 2013; 19:6950-5. [DOI: 10.1002/chem.201204573] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2012] [Indexed: 11/10/2022]
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215
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Cordaro M, Risitano F, Scala A, Rescifina A, Chiacchio U, Grassi G. Self-catalyzed Mannich-type reaction of enolizable cyclic 1,3-dicarbonyls to acyclic nitrones: an entry to functionalized β-enamino diones. J Org Chem 2013; 78:3972-9. [PMID: 23506161 DOI: 10.1021/jo400331b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A new method for the preparation of highly functionalized β-enamino diones has been developed. The protocol involves an initial self-catalyzed Mannich-type reaction of enolizable cyclic 1,3-dicarbonyls to nitrones, followed by a spontaneous intramolecular reorganization of the resulting nonisolated hydroxylamine to enamino derivatives. These compounds retain the features of unnatural α-amino acids. The ease of preparation makes them attractive intermediates for the synthesis of peptidomimetics, polyheterocycles, and other multifunctional compounds. All experimental results have been efficiently rationalized by in silico studies at the M06-2X level of theory, and a valid mechanistic pathway has been proposed.
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Affiliation(s)
- Massimiliano Cordaro
- Dipartimento di Scienze Chimiche, Università di Messina, V. le F. Stagno d'Alcontres 31, Messina 98166, Italy
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216
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Demir AS, Basceken S. Study of asymmetric aldol and Mannich reactions catalyzed by proline–thiourea host–guest complexes in nonpolar solvents. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.tetasy.2013.03.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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217
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He R, Zeng LF, He Y, Wu L, Gunawan AM, Zhang ZY. Organocatalytic multicomponent reaction for the acquisition of a selective inhibitor of mPTPB, a virulence factor of tuberculosis. Chem Commun (Camb) 2013; 49:2064-6. [PMID: 23380872 PMCID: PMC3586706 DOI: 10.1039/c3cc38961h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mycobacterium protein tyrosine phosphatase B (mPTPB) is essential for the survival and persistence of Mycobacterium in the host. Thus small molecule inhibitors of mPTPB are potential anti-TB agents. We developed an efficient organocatalytic multicomponent reaction (MCR) between pyrrole, formaldehyde and aniline, affording a potent and selective mPTPB inhibitor with an IC(50) value of 1.5 μM and >50-fold specificity. Our studies provide a successful example of using organocatalysis as a discovery tool for the acquisition of PTP inhibitors.
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Affiliation(s)
- Rongjun He
- Department of Biochemistry and Molecular Biology, Chemical Genomics Core Facility, Indiana University School of Medicine, 635 Barnhill Drive, Indianapolis, IN, USA, 46202
| | - Li-Fan Zeng
- Department of Biochemistry and Molecular Biology, Chemical Genomics Core Facility, Indiana University School of Medicine, 635 Barnhill Drive, Indianapolis, IN, USA, 46202
| | - Yantao He
- Department of Biochemistry and Molecular Biology, Chemical Genomics Core Facility, Indiana University School of Medicine, 635 Barnhill Drive, Indianapolis, IN, USA, 46202
| | - Li Wu
- Department of Biochemistry and Molecular Biology, Chemical Genomics Core Facility, Indiana University School of Medicine, 635 Barnhill Drive, Indianapolis, IN, USA, 46202
| | - Andrea Michelle Gunawan
- Department of Biochemistry and Molecular Biology, Chemical Genomics Core Facility, Indiana University School of Medicine, 635 Barnhill Drive, Indianapolis, IN, USA, 46202
| | - Zhong-Yin Zhang
- Department of Biochemistry and Molecular Biology, Chemical Genomics Core Facility, Indiana University School of Medicine, 635 Barnhill Drive, Indianapolis, IN, USA, 46202
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218
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Niu Z, Lin S, Dong Z, Sun H, Liang F, Zhang J. Otherwise inert reaction of sulfonamides/carboxamides with formamides via proton transfer-enhanced reactivity. Org Biomol Chem 2013; 11:2460-5. [PMID: 23429527 DOI: 10.1039/c3ob27351b] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
NBS-mediated addition-elimination reaction of sulfonamides/carboxamides and formamides afforded N-sulfonylamidines and N-formylarylamides, respectively, depending on the different mechanism of elimination. Hydrogen bond-induced proton transfer leads to enhanced reactivities and was proposed as the key driving force for the reaction to take place. The protocol demonstrates the possibility of constructing chemical bonds based on a proton transfer strategy induced by noncovalent hydrogen bond interaction.
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Affiliation(s)
- Zaihai Niu
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
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219
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Chen L, Zhu F, Wang CH, Zhou J. A highly efficient thiourea catalyzed dehydrative nucleophilic substitution reaction of 3-substituted oxindoles with xanthydrols. RSC Adv 2013. [DOI: 10.1039/c3ra44520h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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220
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Kim SM, Yang JW. Organocatalytic asymmetric synthesis of β3-amino acid derivatives. Org Biomol Chem 2013; 11:4737-49. [DOI: 10.1039/c3ob40917a] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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221
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Sengupta A, Sunoj RB. Mechanistic Insights on Organocatalytic Enantioselective Decarboxylative Protonation by Epicinchona-Thiourea Hybrid Derivatives. J Org Chem 2012; 77:10525-36. [DOI: 10.1021/jo301483p] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Arkajyoti Sengupta
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Raghavan B. Sunoj
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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222
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Beletskiy EV, Schmidt J, Wang XB, Kass SR. Three hydrogen bond donor catalysts: oxyanion hole mimics and transition state analogues. J Am Chem Soc 2012; 134:18534-7. [PMID: 23113730 DOI: 10.1021/ja3085862] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Enzymes and their mimics use hydrogen bonds to catalyze chemical transformations. Small-molecule transition state analogues of oxyanion holes have been characterized by computations, gas-phase IR and photoelectron spectroscopy, and determination of their binding constants in acetonitrile. A new class of hydrogen bond catalysts is proposed (donors that can contribute three hydrogen bonds to a single functional group) and demonstrated in a Friedel-Crafts reaction. The employed catalyst was observed to react 100 times faster than its rotamer that can employ only two hydrogen bonds. The former compound also binds anions more tightly and was found to have a thermodynamic advantage.
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Affiliation(s)
- Evgeny V Beletskiy
- Department of Chemistry, University of Minnesota, Minneapolis, 55455, United States
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223
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Wang Y, Yu TY, Zhang HB, Luo YC, Xu PF. Hydrogen-Bond-Mediated Supramolecular Iminium Ion Catalysis. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201206881] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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224
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Wang Y, Yu TY, Zhang HB, Luo YC, Xu PF. Hydrogen-Bond-Mediated Supramolecular Iminium Ion Catalysis. Angew Chem Int Ed Engl 2012; 51:12339-42. [DOI: 10.1002/anie.201206881] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Indexed: 11/06/2022]
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225
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Messmer AT, Lippert KM, Steinwand S, Lerch EBW, Hof K, Ley D, Gerbig D, Hausmann H, Schreiner PR, Bredenbeck J. Two-Dimensional Infrared Spectroscopy Reveals the Structure of an Evans Auxiliary Derivative and Its SnCl4Lewis Acid Complex. Chemistry 2012; 18:14989-95. [DOI: 10.1002/chem.201201583] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Indexed: 11/12/2022]
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226
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Lippert KM, Hof K, Gerbig D, Ley D, Hausmann H, Guenther S, Schreiner PR. Hydrogen-Bonding Thiourea Organocatalysts: The Privileged 3,5-Bis(trifluoromethyl)phenyl Group. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200739] [Citation(s) in RCA: 174] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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227
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Károlyi B, Fábián A, Kovács Z, Varga S, Drahos L, Sohár P, Csámpai A. DFT analysis of a key step in the cinchona-mediated organocatalytic Michael-addition of nitromethane to 1,3-diphenylpropenone. COMPUT THEOR CHEM 2012. [DOI: 10.1016/j.comptc.2012.07.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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228
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Jörres M, Schiffers I, Atodiresei I, Bolm C. Asymmetric Michael Additions of α-Nitrocyclohexanone to Aryl Nitroalkenes Catalyzed by Natural Amino Acid-Derived Bifunctional Thioureas. Org Lett 2012; 14:4518-21. [DOI: 10.1021/ol302005f] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Manuel Jörres
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg1, D-52074 Aachen, Germany
| | - Ingo Schiffers
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg1, D-52074 Aachen, Germany
| | - Iuliana Atodiresei
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg1, D-52074 Aachen, Germany
| | - Carsten Bolm
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg1, D-52074 Aachen, Germany
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229
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Zhao X, Kang L, Wang N, An H, Li F, Wang Y. Synthesis of Methyl N-Phenyl Carbamate Catalyzed by Ionic Liquid-Promoted Zinc Acetate. Ind Eng Chem Res 2012. [DOI: 10.1021/ie301246q] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xinqiang Zhao
- Hebei Provincial Key Lab of Green Chemical Technology
and High Efficient Energy Saving, Hebei University of Technology, Tianjin 300130, China
| | - Lijuan Kang
- Hebei Provincial Key Lab of Green Chemical Technology
and High Efficient Energy Saving, Hebei University of Technology, Tianjin 300130, China
| | - Na Wang
- Hebei Provincial Key Lab of Green Chemical Technology
and High Efficient Energy Saving, Hebei University of Technology, Tianjin 300130, China
| | - Hualiang An
- Hebei Provincial Key Lab of Green Chemical Technology
and High Efficient Energy Saving, Hebei University of Technology, Tianjin 300130, China
| | - Fang Li
- Hebei Provincial Key Lab of Green Chemical Technology
and High Efficient Energy Saving, Hebei University of Technology, Tianjin 300130, China
| | - Yanji Wang
- Hebei Provincial Key Lab of Green Chemical Technology
and High Efficient Energy Saving, Hebei University of Technology, Tianjin 300130, China
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230
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Linder M, Brinck T. Stepwise Diels-Alder: more than just an oddity? A computational mechanistic study. J Org Chem 2012; 77:6563-73. [PMID: 22780581 DOI: 10.1021/jo301176t] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We have employed hybrid DFT and SCS-MP2 calculations at the SMD-PCM-6-311++G(2d,2p)//6-31+G(d) level to investigate the relationship between three possible channels for forming a Diels-Alder adduct from a highly nucleophilic diene and moderately to highly electrophilic dienophiles. We discuss geometries optimized using the B3LYP and M06-2X functionals with the 6-31+(d) basis set. The transition states and intermediates are characterized on the basis of geometric and electronic properties, and we also address the possibility of predicting detectability of a zwitterionic intermediate based on its relative stability. Our results show that a conventional Diels-Alder transition state conformation yields intermediates in all four investigated cases, but that these are too short-lived to be detected experimentally for the less activated reactants. The stepwise trans pathway, beginning with a conjugate addition-like transition state, becomes increasingly competitive with more activated reactants and is indeed favored for the most electrophilic dienophiles. Addition of a trans diene leads to a dead-end as the trans intermediates have insurmountable rotation barriers that prohibit formation of the second bond, unless another, heterocyclic intermediate is formed. We also show that introduction of a hydrogen bond donating catalyst favors a stepwise pathway even for less activated dienophiles.
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Affiliation(s)
- Mats Linder
- Applied Physical Chemistry, KTH Royal Institute of Technology, Teknikringen 30, S-100 44 Stockholm
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231
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Fabry DC, Stodulski M, Hoerner S, Gulder T. Metal-Free Synthesis of 3,3-Disubstituted Oxoindoles by Iodine(III)-Catalyzed Bromocarbocyclizations. Chemistry 2012; 18:10834-8. [DOI: 10.1002/chem.201201232] [Citation(s) in RCA: 116] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Indexed: 11/11/2022]
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232
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Prakash GKS, Wang F, Zhang Z, Ni C, Haiges R, Olah GA. Enantioselective synthesis of α-stereogenic γ-keto esters via formal umpolung. Org Lett 2012; 14:3260-3. [PMID: 22708653 DOI: 10.1021/ol301112m] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A feasible method has been developed for the enantioselective synthesis of α-stereogenic γ-keto esters. By employing nitro(phenylsulfonyl)methane as an acyl anion equivalent, the integrated Michael addition reaction-oxidative methanolysis protocol allows the preparation of various γ-keto esters with high optical purities.
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Affiliation(s)
- G K Surya Prakash
- Loker Hydrocarbon Research Institute, Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, USA.
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233
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Nickerson DM, Mattson AE. Transition Metal and Hydrogen Bond Donor Hybrids: Catalysts for the Activation of Alkylidene Malonates. Chemistry 2012; 18:8310-4. [DOI: 10.1002/chem.201201206] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2012] [Indexed: 11/07/2022]
Affiliation(s)
- David M. Nickerson
- Department of Chemistry, The Ohio State University, 100 W. 18th Ave., Columbus, OH 43210 (USA), Fax: (+1) 614‐292‐1685
| | - Anita E. Mattson
- Department of Chemistry, The Ohio State University, 100 W. 18th Ave., Columbus, OH 43210 (USA), Fax: (+1) 614‐292‐1685
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234
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Mittal N, Sun DX, Seidel D. Kinetic Resolution of Amines via Dual Catalysis: Remarkable Dependence of Selectivity on the Achiral Cocatalyst. Org Lett 2012; 14:3084-7. [DOI: 10.1021/ol301155b] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Nisha Mittal
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Diana X. Sun
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Daniel Seidel
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
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235
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So SS, Mattson AE. Urea Activation of α-Nitrodiazoesters: An Organocatalytic Approach to N–H Insertion Reactions. J Am Chem Soc 2012; 134:8798-801. [PMID: 22568726 DOI: 10.1021/ja3031054] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sonia S. So
- The Ohio State University, Department of Chemistry, 100 West 18th Avenue, Columbus, Ohio 43210,
United States
| | - Anita E. Mattson
- The Ohio State University, Department of Chemistry, 100 West 18th Avenue, Columbus, Ohio 43210,
United States
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236
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Liu GG, Zhao H, Lan YB, Wu B, Huang XF, Chen J, Tao JC, Wang XW. Asymmetric cross aldol addition of isatins with α,β-unsaturated ketones catalyzed by a bifunctional Brønsted acid–Brønsted base organocatalyst. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.03.042] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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237
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Grošelj U, Ričko S, Svete J, Stanovnik B. Synthesis of 2-(3-(3,5-bis(trifluoromethyl)phenyl)thioureido)-3-((dimethylamino)methyl)camphor organocatalysts. Chirality 2012; 24:412-9. [PMID: 22514057 DOI: 10.1002/chir.22035] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2011] [Accepted: 02/13/2012] [Indexed: 11/06/2022]
Abstract
In a stereo-divergent synthesis, three novel camphor-derived bifunctional thiourea organocatalysts 7-9 have been prepared in five steps starting from (+)-camphor. In addition, borneol-derived bifunctional thiourea organocatalysts 19/19' have been prepared in three steps from (1S)-(+)-camphorquinone. Novel organocatalysts 7-9, 19/19' have been evaluated in a model reaction of Michael addition of dimethyl malonate to trans-β-nitrostyrene with low to moderate enantioselectivities (20%-60% ee). Configuration of all novel compounds has been meticulously determined using nuclear magnetic resonance (NMR) techniques.
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Affiliation(s)
- Uroš Grošelj
- Organic chemistry, University of Ljubljana, Faculty of Chemistry and Chemical Technology, Ljubljana, Slovenia.
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238
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Jakab G, Tancon C, Zhang Z, Lippert KM, Schreiner PR. (Thio)urea Organocatalyst Equilibrium Acidities in DMSO. Org Lett 2012; 14:1724-7. [DOI: 10.1021/ol300307c] [Citation(s) in RCA: 199] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gergely Jakab
- Institute of Organic Chemistry, Justus-Liebig University Giessen, Heinrich-Buff-Ring 58, 35392 Giessen, Germany
| | - Carlo Tancon
- Institute of Organic Chemistry, Justus-Liebig University Giessen, Heinrich-Buff-Ring 58, 35392 Giessen, Germany
| | - Zhiguo Zhang
- Institute of Organic Chemistry, Justus-Liebig University Giessen, Heinrich-Buff-Ring 58, 35392 Giessen, Germany
| | - Katharina M. Lippert
- Institute of Organic Chemistry, Justus-Liebig University Giessen, Heinrich-Buff-Ring 58, 35392 Giessen, Germany
| | - Peter R. Schreiner
- Institute of Organic Chemistry, Justus-Liebig University Giessen, Heinrich-Buff-Ring 58, 35392 Giessen, Germany
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239
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Suez G, Bloch V, Nisnevich G, Gandelman M. Design and Development of Bioinspired Guanine-Based Organic Catalyst for Asymmetric Catalysis. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200118] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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240
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Grošelj U, Golobič A, Stare K, Svete J, Stanovnik B. Synthesis and structural elucidation of novel camphor-derived thioureas. Chirality 2012; 24:307-17. [PMID: 22344868 DOI: 10.1002/chir.21999] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2011] [Accepted: 12/14/2011] [Indexed: 11/06/2022]
Abstract
Nine novel (+)-camphor-derived thioureas have been prepared. 3-((Dimethylamino)methylene)camphor (2) served as the common precursor for the preparation of both, 2-thiourea 15-20 and 3-thiourea functionalized camphor derivatives 6, 7/7', respectively. Starting from 2, the latter were prepared in two or three steps whereas the former in five steps, respectively. Configuration of all novel compounds has been meticulously determined using NMR techniques and/or single crystal X-ray crystallography.
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Affiliation(s)
- Uroš Grošelj
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Aškerčeva 5, 1000 Ljubljana, Slovenia.
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241
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Schneider JF, Fröhlich R, Paradies J. [2.2]Paracyclophane-Derived Planar-Chiral Hydrogen-Bond Receptors. Isr J Chem 2012. [DOI: 10.1002/ijch.201100082] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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242
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Roberts JM, Fini BM, Sarjeant AA, Farha OK, Hupp JT, Scheidt KA. Urea Metal–Organic Frameworks as Effective and Size-Selective Hydrogen-Bond Catalysts. J Am Chem Soc 2012; 134:3334-7. [DOI: 10.1021/ja2108118] [Citation(s) in RCA: 266] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- John M. Roberts
- Department
of Chemistry, §International Institute for Nanotechnology, and ‡Center for Molecular Innovation
and Drug Discovery, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Branden M. Fini
- Department
of Chemistry, §International Institute for Nanotechnology, and ‡Center for Molecular Innovation
and Drug Discovery, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Amy A. Sarjeant
- Department
of Chemistry, §International Institute for Nanotechnology, and ‡Center for Molecular Innovation
and Drug Discovery, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Omar K. Farha
- Department
of Chemistry, §International Institute for Nanotechnology, and ‡Center for Molecular Innovation
and Drug Discovery, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Joseph T. Hupp
- Department
of Chemistry, §International Institute for Nanotechnology, and ‡Center for Molecular Innovation
and Drug Discovery, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Karl A. Scheidt
- Department
of Chemistry, §International Institute for Nanotechnology, and ‡Center for Molecular Innovation
and Drug Discovery, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
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243
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Li X, Zhang YY, Xue XS, Jin JL, Tan BX, Liu C, Dong N, Cheng JP. Asymmetric Michael Addition Reactions between 3-Substituted Benzofuran-2(3H)-ones and 1,1-Bis(phenylsulfonyl)ethylene Catalyzed by Bifunctional Catalysts Containing Tertiary Amine and Thiourea Groups. European J Org Chem 2012. [DOI: 10.1002/ejoc.201101765] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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244
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Lee M, Zhang L, Park Y, Park HG. Chiral 2-aminobenzimidazole bifunctional organocatalysts: effect of di-CF3 and TFA on catalytic mechanisms. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.12.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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245
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Tripathi CB, Mukherjee S. Lewis Base Catalysis by Thiourea: N-Bromosuccinimide-Mediated Oxidation of Alcohols. J Org Chem 2012; 77:1592-8. [DOI: 10.1021/jo202269p] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
| | - Santanu Mukherjee
- Department of Organic
Chemistry, Indian Institute of Science, Bangalore 560 012, India
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246
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Ramachary DB, Venkaiah C, Krishna PM. Discovery of 2-aminobuta-1,3-enynes in asymmetric organocascade catalysis: construction of drug-like spirocyclic cyclohexanes having five to six contiguous stereocenters. Chem Commun (Camb) 2012; 48:2252-4. [PMID: 22252651 DOI: 10.1039/c2cc17219d] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We present herein for the first time the asymmetric synthesis of drug-like spiranes through reflexive-Michael reaction by using 2-aminobuta-1,3-enyne catalysis under mild conditions.
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247
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Li X, Xue XS, Liu C, Wang B, Tan BX, Jin JL, Zhang YY, Dong N, Cheng JP. Asymmetric Michael addition reactions of 3-substituted benzofuran-2(3H)-ones to nitroolefins catalyzed by a bifunctional tertiary-amine thiourea. Org Biomol Chem 2012; 10:413-20. [DOI: 10.1039/c1ob06518a] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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248
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Sarkar A, Raha Roy S, Kumar D, Madaan C, Rudrawar S, Chakraborti AK. Lack of correlation between catalytic efficiency and basicity of amines during the reaction of aryl methyl ketones with DMF-DMA: an unprecedented supramolecular domino catalysis. Org Biomol Chem 2012; 10:281-6. [DOI: 10.1039/c1ob06043k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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249
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Boonsri S, Gunawan C, Krenske EH, Rizzacasa MA. Synthetic studies towards the mulberry Diels–Alder adducts: H-bond accelerated cycloadditions of chalcones. Org Biomol Chem 2012; 10:6010-21. [DOI: 10.1039/c2ob25115a] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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250
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Bernardi L, Fochi M, Comes Franchini M, Ricci A. Bioinspired organocatalytic asymmetric reactions. Org Biomol Chem 2012; 10:2911-22. [DOI: 10.1039/c2ob07037e] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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