201
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Cantekin S, ten Eikelder HMM, Markvoort AJ, Veld MAJ, Korevaar PA, Green MM, Palmans ARA, Meijer EW. Consequences of Cooperativity in Racemizing Supramolecular Systems. Angew Chem Int Ed Engl 2012; 51:6426-31. [DOI: 10.1002/anie.201201701] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Indexed: 11/10/2022]
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202
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Zhou L, Coats SJ, Zhang H, Junxing S, Bobeck DR, Schinazi RF. Scaleable processes for the synthesis of (-)-β-D-2,6-diaminopurine dioxolane (Amdoxovir, DAPD) and (-)-β-D-2-aminopurine dioxolane (APD). Tetrahedron 2012; 68:5738-5743. [PMID: 23162170 DOI: 10.1016/j.tet.2012.05.039] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
An efficient and scalable synthesis of (-)-DAPD and (-)-APD has been developed. We discovered that t-butyl cyanoacetate can be used as a new additive for the sugar nucleoside base coupling step en route to DAPD with improved β-selectivity and an isolated yield four fold greater than the original process scale method. Using this new process, (-)-DAPD has been prepared on greater than 20 g scale. In the synthesis of (-)-APD, a key enzyme-catalyzed hydrolysis reaction afforded the water-soluble deprotected α-anomer while leaving the β-anomer completely untouched.
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Affiliation(s)
- Longhu Zhou
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, and Veterans Affairs Medical Center, Atlanta GA 30033, USA
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203
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Cantekin S, ten Eikelder HMM, Markvoort AJ, Veld MAJ, Korevaar PA, Green MM, Palmans ARA, Meijer EW. Consequences of Cooperativity in Racemizing Supramolecular Systems. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201201701] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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204
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Wiggins KM, Brantley JN, Bielawski CW. Polymer Mechanochemistry: Force Enabled Transformations. ACS Macro Lett 2012; 1:623-626. [PMID: 35607074 DOI: 10.1021/mz300167y] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
In this viewpoint, we highlight the ability of mechanical force to overcome the limitations associated with using thermal or photochemical stimuli to facilitate chemical transformations. Emphasis will be directed toward examples of new chemical reactions that are accessed through externally applied mechanical forces, as these are illustrative of the emerging concept of using polymer chemistry to drive the synthesis of small molecules. In parallel, we offer perspectives on the potential applications of polymer mechanochemistry in the development of novel synthetic strategies.
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Affiliation(s)
- Kelly M. Wiggins
- Department
of Chemistry and Biochemistry, University of Texas at Austin, 1 University
Station A1590, Austin, Texas 78712, United States
| | - Johnathan N. Brantley
- Department
of Chemistry and Biochemistry, University of Texas at Austin, 1 University
Station A1590, Austin, Texas 78712, United States
| | - Christopher W. Bielawski
- Department
of Chemistry and Biochemistry, University of Texas at Austin, 1 University
Station A1590, Austin, Texas 78712, United States
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205
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Morán-Ramallal R, Gotor-Fernández V, Laborda P, Sayago FJ, Cativiela C, Gotor V. Dynamic Kinetic Resolution of 1,3-Dihydro-2H-isoindole-1-carboxylic Acid Methyl Ester: Asymmetric Transformations toward Isoindoline Carbamates. Org Lett 2012; 14:1696-9. [DOI: 10.1021/ol300250h] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Roberto Morán-Ramallal
- Departamento de Química Orgánica e Inorgánica, Instituto Universitario de Biotecnología de Asturias, Universidad de Oviedo, 33006 Oviedo, Spain
| | - Vicente Gotor-Fernández
- Departamento de Química Orgánica e Inorgánica, Instituto Universitario de Biotecnología de Asturias, Universidad de Oviedo, 33006 Oviedo, Spain
| | - Pedro Laborda
- Departamento de Química Orgánica, Instituto de Síntesis Química y Catálisis Homogénea, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Francisco J. Sayago
- Departamento de Química Orgánica, Instituto de Síntesis Química y Catálisis Homogénea, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Carlos Cativiela
- Departamento de Química Orgánica, Instituto de Síntesis Química y Catálisis Homogénea, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Vicente Gotor
- Departamento de Química Orgánica e Inorgánica, Instituto Universitario de Biotecnología de Asturias, Universidad de Oviedo, 33006 Oviedo, Spain
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206
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Sato Y, Kayaki Y, Ikariya T. Efficient dynamic kinetic resolution of racemic secondary alcohols by a chemoenzymatic system using bifunctional iridium complexes with C-N chelate amido ligands. Chem Commun (Camb) 2012; 48:3635-7. [PMID: 22389045 DOI: 10.1039/c2cc30333g] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The combined catalyst system of bifunctional amidoiridium complexes derived from benzylic amines with CALB was found to provide a range of chiral acetates from racemic secondary alcohols in excellent yields with nearly perfect enantioselectivities via dynamic kinetic resolution.
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Affiliation(s)
- Yasuhiro Sato
- Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, O-okayama 2-12-1-E4-1, Tokyo 152-8552, Japan
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207
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Nakatani K, Ogura Y, Koda Y, Terashima T, Sawamoto M. Sequence-regulated copolymers via tandem catalysis of living radical polymerization and in situ transesterification. J Am Chem Soc 2012; 134:4373-83. [PMID: 22296320 DOI: 10.1021/ja211436n] [Citation(s) in RCA: 132] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Sequence regulation of monomers is undoubtedly a challenging issue as an ultimate goal in polymer science. To efficiently produce sequence-controlled copolymers, we herein developed the versatile tandem catalysis, which concurrently and/or sequentially involved ruthenium-catalyzed living radical polymerization and in situ transesterification of methacrylates (monomers: RMA) with metal alkoxides (catalysts) and alcohols (ROH). Typically, gradient copolymers were directly obtained from the synchronization of the two reactions: the instantaneous monomer composition in feed gradually changed via the transesterification of R(1)MA into R(2)MA in the presence of R(2)OH during living polymerization to give R(1)MA/R(2)MA gradient copolymers. The gradient sequence of monomers along a chain was catalytically controlled by the reaction conditions such as temperature, concentration and/or species of catalysts, alcohols, and monomers. The sequence regulation of multimonomer units was also successfully achieved in one-pot by monomer-selective transesterification in concurrent tandem catalysis and iterative tandem catalysis, providing random-gradient copolymers and gradient-block counterparts, respectively. In contrast, sequential tandem catalysis via the variable initiation of either polymerization or in situ transesterification led to random or block copolymers. Due to the versatile adaptability of common and commercially available reagents (monomers, alcohols, catalysts), this tandem catalysis is one of the most efficient, convenient, and powerful tools to design tailor-made sequence-regulated copolymers.
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Affiliation(s)
- Kazuhiro Nakatani
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Kyoto 615-8510, Japan
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208
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Putignano E, Bossi G, Rigo P, Baratta W. MCl2(ampy)(dppf) (M = Ru, Os): Multitasking Catalysts for Carbonyl Compound/Alcohol Interconversion Reactions. Organometallics 2012. [DOI: 10.1021/om201189r] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elisabetta Putignano
- Dipartimento di
Chimica, Fisica e Ambiente, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Gianluca Bossi
- Dipartimento di
Chimica, Fisica e Ambiente, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Pierluigi Rigo
- Dipartimento di
Chimica, Fisica e Ambiente, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Walter Baratta
- Dipartimento di
Chimica, Fisica e Ambiente, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
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209
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210
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211
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Hopewell JP, Martins JED, Johnson TC, Godfrey J, Wills M. Developing asymmetric iron and ruthenium-based cyclone complexes; complex factors influence the asymmetric induction in the transfer hydrogenation of ketones. Org Biomol Chem 2012; 10:134-45. [DOI: 10.1039/c1ob06010d] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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212
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D'Arrigo P, Cerioli L, Servi S, Viani F, Tessaro D. Synergy between catalysts: enzymes and bases. DKR of non-natural amino acids derivatives. Catal Sci Technol 2012. [DOI: 10.1039/c2cy20106b] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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213
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Krasnov VP, Gruzdev DA, Levit GL. Nonenzymatic Acylative Kinetic Resolution of Racemic Amines and Related Compounds. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101489] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Victor P. Krasnov
- Postovsky Institute of Organic Synthesis of RAS, 22/20, S. Kovalevskoy, Akademicheskaya St., 620990 Ekaterinburg, Russian Federation, Fax: +7‐343‐3741189
| | - Dmitry A. Gruzdev
- Postovsky Institute of Organic Synthesis of RAS, 22/20, S. Kovalevskoy, Akademicheskaya St., 620990 Ekaterinburg, Russian Federation, Fax: +7‐343‐3741189
| | - Galina L. Levit
- Postovsky Institute of Organic Synthesis of RAS, 22/20, S. Kovalevskoy, Akademicheskaya St., 620990 Ekaterinburg, Russian Federation, Fax: +7‐343‐3741189
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214
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Sonoike S, Itakura T, Kitamura M, Aoki S. One-pot chemoenzymatic synthesis of chiral 1,3-diols using an enantioselective aldol reaction with chiral Zn2+ complex catalysts and enzymatic reduction using oxidoreductases with cofactor regeneration. Chem Asian J 2011; 7:64-74. [PMID: 22174123 DOI: 10.1002/asia.201100584] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Indexed: 11/10/2022]
Abstract
We previously reported on enantioselective aldol reactions of acetone and some aldehydes catalyzed by chiral Zn(2+) complexes of L-prolyl-pendant [12]aneN(4) (L-ZnL(1)) and L-valyl-pendant [12]aneN(4) (L-ZnL(2)) in aqueous solution. Here, we report on the one-pot chemoenzymatic synthesis of chiral 1,3-diols in an aqueous solvent system at room temperature by a combination of enantioselective aldol reactions catalyzed by Zn(2+) complexes of L- and D-phenylalanyl-pendant [12]aneN(4) (L-ZnL(3) and D-ZnL(3) ) and the successive enantioselective reduction of the aldol products using oxidoreductases with the regeneration of the NADH (reduced form of nicotinamine adenine dinucleotide) cofactor. The findings indicate that all four stereoisomers of 1,3-diols can be produced by appropriate selection of a chiral Zn(2+)-complex and an oxidoreductase commercially available from the "Chiralscreen OH" kit.
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Affiliation(s)
- Shotaro Sonoike
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, Yamazaki, Noda, Japan
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215
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Manzini S, Urbina-Blanco CA, Poater A, Slawin AMZ, Cavallo L, Nolan SP. From Olefin Metathesis Catalyst to Alcohol Racemization Catalyst in One Step. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201106915] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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216
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Manzini S, Urbina-Blanco CA, Poater A, Slawin AMZ, Cavallo L, Nolan SP. From Olefin Metathesis Catalyst to Alcohol Racemization Catalyst in One Step. Angew Chem Int Ed Engl 2011; 51:1042-5. [DOI: 10.1002/anie.201106915] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Indexed: 11/11/2022]
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217
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Nun P, Fortman GC, Slawin AMZ, Nolan SP. Ruthenium Hydroxide Complexes in the Racemization of Secondary Alcohols. Organometallics 2011. [DOI: 10.1021/om200956r] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pierrick Nun
- EaStCHEM, School
of Chemistry, University of St. Andrews, St. Andrews, KY16 9ST, U.K
| | - George C. Fortman
- EaStCHEM, School
of Chemistry, University of St. Andrews, St. Andrews, KY16 9ST, U.K
| | | | - Steven P. Nolan
- EaStCHEM, School
of Chemistry, University of St. Andrews, St. Andrews, KY16 9ST, U.K
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218
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Bora PP, Bez G, Anal JMH. First example of hydrolytic kinetic resolution of acrylate of secondary alcohols by lipase Amano AK. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.molcatb.2011.06.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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219
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Yuryev R, Strompen S, Liese A. Coupled chemo(enzymatic) reactions in continuous flow. Beilstein J Org Chem 2011; 7:1449-67. [PMID: 22238518 PMCID: PMC3252844 DOI: 10.3762/bjoc.7.169] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2011] [Accepted: 09/22/2011] [Indexed: 11/23/2022] Open
Abstract
This review highlights the state of the art in the field of coupled chemo(enzymatic) reactions in continuous flow. Three different approaches to such reaction systems are presented herein and discussed in view of their advantages and disadvantages as well as trends for their future development.
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Affiliation(s)
- Ruslan Yuryev
- Institute of Technical Biocatalysis, Hamburg University of Technology, Denickestr. 15, 21073, Hamburg, Germany
| | - Simon Strompen
- Institute of Technical Biocatalysis, Hamburg University of Technology, Denickestr. 15, 21073, Hamburg, Germany
| | - Andreas Liese
- Institute of Technical Biocatalysis, Hamburg University of Technology, Denickestr. 15, 21073, Hamburg, Germany
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220
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Shakeri M, Tai CW, Göthelid E, Oscarsson S, Bäckvall JE. Small Pd nanoparticles supported in large pores of mesocellular foam: an excellent catalyst for racemization of amines. Chemistry 2011; 17:13269-73. [PMID: 22012921 DOI: 10.1002/chem.201101265] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Indexed: 11/05/2022]
Abstract
Highly dispersed palladium nanoparticles (1-2 nm) supported in large-pore mesocellular foam (MCF; 29 nm) were synthesized. The Pd-nanocatalyst/MCF system was characterized by transmission electron microscopy (TEM), powder X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The performance of the Pd nanocatalyst obtained was examined for amine racemization. The Pd nanocatalyst showed higher activity and selectivity toward racemization of (S)-1-phenylethyl amine than any other amine racemization catalyst reported so far and it could be reused several times. Our data from TEM and XRD suggest a restructuring of the Pd nanocatalyst from amorphous to crystalline and an increase in Pd nanocatalyst size during the racemization reaction. This led to an unexpected increase of activity after the first use. The Pd nanocatalyst obtained can be integrated with other resolving processes of racemic organic compounds to increase the yield of chiral organic products.
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Affiliation(s)
- Mozaffar Shakeri
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 106 91, Stockholm, Sweden
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221
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Racemization of secondary alcohols catalyzed by ruthenium: application to chemoenzymatic dynamic resolution. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.10.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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222
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Manzuna Sapu C, Bäckvall JE, Deska J. Enantioselective Enzymatic Desymmetrization of Prochiral Allenic Diols. Angew Chem Int Ed Engl 2011; 50:9731-4. [DOI: 10.1002/anie.201103227] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2011] [Revised: 06/16/2011] [Indexed: 11/09/2022]
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223
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José C, Bonetto RD, Gambaro LA, Torres MDPG, Foresti ML, Ferreira ML, Briand LE. Investigation of the causes of deactivation–degradation of the commercial biocatalyst Novozym® 435 in ethanol and ethanol–aqueous media. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.molcatb.2011.04.004] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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224
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Verho O, Johnston EV, Karlsson E, Bäckvall JE. Tuning of the Electronic Properties of a Cyclopentadienylruthenium Catalyst to Match Racemization of Electron-Rich and Electron-Deficient Alcohols. Chemistry 2011; 17:11216-22. [DOI: 10.1002/chem.201100827] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Indexed: 11/05/2022]
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225
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Panteleev J, Zhang L, Lautens M. Domino Rhodium-Catalyzed Alkyne Arylation/Palladium-Catalyzed N Arylation: A Mechanistic Investigation. Angew Chem Int Ed Engl 2011; 50:9089-92. [DOI: 10.1002/anie.201103692] [Citation(s) in RCA: 108] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Indexed: 11/06/2022]
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226
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Panteleev J, Zhang L, Lautens M. Domino Rhodium-Catalyzed Alkyne Arylation/Palladium-Catalyzed N Arylation: A Mechanistic Investigation. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201103692] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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227
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Poulhès F, Vanthuyne N, Bertrand MP, Gastaldi S, Gil G. Chemoenzymatic Dynamic Kinetic Resolution of Primary Amines Catalyzed by CAL-B at 38–40 °C. J Org Chem 2011; 76:7281-6. [DOI: 10.1021/jo201256w] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Florent Poulhès
- Equipe Chimie Moléculaire Organique, LCP UMR 6264, Boite 562, and ‡Equipe Stéréochimie Dynamique et Chiralité, ISM2, UMR 6263, Université Aix-Marseille, Faculté des Sciences St Jérôme, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Nicolas Vanthuyne
- Equipe Chimie Moléculaire Organique, LCP UMR 6264, Boite 562, and ‡Equipe Stéréochimie Dynamique et Chiralité, ISM2, UMR 6263, Université Aix-Marseille, Faculté des Sciences St Jérôme, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Michèle P. Bertrand
- Equipe Chimie Moléculaire Organique, LCP UMR 6264, Boite 562, and ‡Equipe Stéréochimie Dynamique et Chiralité, ISM2, UMR 6263, Université Aix-Marseille, Faculté des Sciences St Jérôme, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Stéphane Gastaldi
- Equipe Chimie Moléculaire Organique, LCP UMR 6264, Boite 562, and ‡Equipe Stéréochimie Dynamique et Chiralité, ISM2, UMR 6263, Université Aix-Marseille, Faculté des Sciences St Jérôme, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Gérard Gil
- Equipe Chimie Moléculaire Organique, LCP UMR 6264, Boite 562, and ‡Equipe Stéréochimie Dynamique et Chiralité, ISM2, UMR 6263, Université Aix-Marseille, Faculté des Sciences St Jérôme, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
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228
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Busacca CA, Fandrick DR, Song JJ, Senanayake CH. The Growing Impact of Catalysis in the Pharmaceutical Industry. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201100488] [Citation(s) in RCA: 369] [Impact Index Per Article: 28.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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229
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Farrell JM, Heiden ZM, Stephan DW. Metal-Free Transfer Hydrogenation Catalysis by B(C6F5)3. Organometallics 2011. [DOI: 10.1021/om2005832] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jeffrey M. Farrell
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada, M5S 3H6
| | - Zachariah M. Heiden
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada, M5S 3H6
| | - Douglas W. Stephan
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada, M5S 3H6
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230
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Dynamic kinetic resolution of secondary aromatic alcohols with new efficient acyl donors. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.06.034] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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231
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Träff A, Solarte CE, Bäckvall JE. Chemoenzymatic dynamic kinetic resolution as a key step in the enantioselective synthesis of (S)-salbutamol. ACTA ACUST UNITED AC 2011. [DOI: 10.1135/cccc2011029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The synthesis of (S)-salbutamol is described. By utilizing DKR in the enantiodetermining step, employing Burkholderia cepacia lipase (PS-IM), (S)-acetate ((S)-6) was obtained in excellent enantiomeric excess (98%). The subsequent transformations yielded the salt of (S)-salbutamol with retained stereochemistry.
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232
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Bossi G, Putignano E, Rigo P, Baratta W. Pincer Ru and Os complexes as efficient catalysts for racemization and deuteration of alcohols. Dalton Trans 2011; 40:8986-95. [PMID: 21691649 DOI: 10.1039/c1dt10498e] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The pincer complexes [MX(CNN)(PP)] (M = Ru, Os; X = Cl, OTf; HCNN = 1-(6-arylpyridin-2-yl)methanamine; PP = diphosphine) have proven to efficiently catalyze both racemization and deuteration of alcohols in the presence of a base. Chiral alcohols have been racemized at 30-50 °C using 1 mol% of Ru or Os pincer complexes and 5 mol% of KOtBu in 2-propanol. Primary and secondary alcohols are efficiently deuterated at the α position, with respect to the OH group, using 2-propanol-d(8) as solvent with Ru or Os pincer complexes and KOtBu at 30-50 °C. For secondary alcohols incorporation of deuterium at the β position has also been observed. In 2-propanol-d(8) the pincer complexes catalyze the simultaneous deuteration and racemization of (S)-1-phenylethanol, the two processes being strictly correlated. For both reactions much the same activity has been observed with the Ru and Os complexes. The pincer complexes display a superior activity with respect to the related compounds [MCl(2)(NN)(PP)] (NN = bidentate amine or pyridine ligand). The synthesis of the new complexes [MCl(CNN)(PP)] (M = Ru, 2, 4 and Os, 6, 7; PP = dppb, dppf) and [Ru(OTf)(CNN)(dppb)] (3) is also reported.
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Affiliation(s)
- Gianluca Bossi
- Dipartimento di Chimica, Fisica e Ambiente, Università di Udine, Via Cotonificio 108, I-33100, Udine, Italy
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233
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Ramstadius C, Träff AM, Krumlinde P, Bäckvall JE, Cumpstey I. Ruthenium-Catalysed Epimerisation of Carbohydrate Alcohols as a Method to Determine the Equilibria for Epimer Interconversion in Hexopyranosides. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100504] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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234
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García-Urdiales E, Alfonso I, Gotor V. Update 1 of: Enantioselective Enzymatic Desymmetrizations in Organic Synthesis. Chem Rev 2011; 111:PR110-80. [DOI: 10.1021/cr100330u] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Eduardo García-Urdiales
- Departamento de Química
Orgánica e Inorgánica, Facultad de Química, Universidad
de Oviedo, Julián Clavería, 8, 33006 Oviedo, Spain,
and
| | - Ignacio Alfonso
- Departamento de Química Biológica
y Modelización Molecular, Instituto de Química Avanzada
de Cataluña (IQAC, CSIC), Jordi Girona, 18-26, 08034, Barcelona,
Spain
| | - Vicente Gotor
- Departamento de Química
Orgánica e Inorgánica, Facultad de Química, Universidad
de Oviedo, Julián Clavería, 8, 33006 Oviedo, Spain,
and
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236
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Träff A, Lihammar R, Bäckvall JE. A Chemoenzymatic Dynamic Kinetic Resolution Approach to Enantiomerically Pure (R)- and (S)-Duloxetine. J Org Chem 2011; 76:3917-21. [DOI: 10.1021/jo2003665] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Annika Träff
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Richard Lihammar
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Jan-E. Bäckvall
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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238
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Covalent anchoring of a racemization catalyst to CALB-beads: towards dual immobilization of DKR catalysts. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.01.106] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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239
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Jia ZJ, Jiang H, Li JL, Gschwend B, Li QZ, Yin X, Grouleff J, Chen YC, Jørgensen KA. Trienamines in asymmetric organocatalysis: Diels-Alder and tandem reactions. J Am Chem Soc 2011; 133:5053-61. [PMID: 21405125 DOI: 10.1021/ja1112194] [Citation(s) in RCA: 323] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The discovery of a novel activation mode provided by organocatalysis is presented. It is demonstrated that the merger of optically active secondary amines and polyenals generates reactive trienamine intermediates, which readily participate in Diels-Alder reactions with different classes of dienophiles, hence, providing a facile entry to highly complex molecular frameworks with excellent stereocontrol. For the Diels-Alder reactions with 3-olefinic oxindoles, spirocyclic oxidoles are formed in high yields, and with enantioselectivities in the range of 94-98% ee. It is demonstrated, that some of these products can be transformed into the hexahydrofuro[2,3-b]indole fragment. The organocatalytic trienamine concept has been extended to also include Diels-Alder reactions of olefins substituted with cyanoacetates providing multifunctional cyclohexenes with three contiguous stereocenters in high yield and good stereocontrol. The novelty of this activation strategy lies within the perfect chirality relay over a distance of up to eight bonds. Moreover, we also present the first trienamine tandem reaction by combining trienamine catalysis with enamine activation. In addition to the experimental results, a detailed mechanistic survey is also provided including NMR spectroscopic studies and calculations of the reactive trienamine intermediates, rationalizing the origin of stereochemistry.
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Affiliation(s)
- Zhi-Jun Jia
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, China
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240
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Jiang H, Halskov KS, Johansen TK, Jørgensen KA. Deracemization of Axially Chiral α,β-Unsaturated Aldehydes through an Amino-Catalyzed Symmetry-Making-Symmetry-Breaking Cascade. Chemistry 2011; 17:3842-6. [DOI: 10.1002/chem.201003477] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Revised: 01/28/2011] [Indexed: 11/10/2022]
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241
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Marr AC, Liu S. Combining bio- and chemo-catalysis: from enzymes to cells, from petroleum to biomass. Trends Biotechnol 2011; 29:199-204. [PMID: 21324540 DOI: 10.1016/j.tibtech.2011.01.005] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2010] [Revised: 01/10/2011] [Accepted: 01/12/2011] [Indexed: 11/18/2022]
Abstract
In the future, biomass will continue to emerge as a viable source of chemicals. The development of new industries that utilize bio-renewables provides opportunities for innovation. For example, bio- and chemo-catalysts can be combined in 'one pot' to prepare chemicals of commercial value. This has been demonstrated using isolated enzymes and whole cells for a variety of chemical transformations. The one-pot approach has been successfully adopted to convert chemicals derived from biomass, and, in our opinion, it has an important role to play in the design of a more sustainable chemical industry. To implement new one-pot bio- and chemo-catalytic processes, issues of incompatibility must be overcome; the strategies for which are discussed in this opinion article.
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Affiliation(s)
- Andrew C Marr
- Queen's University Belfast, David Keir Building, Stranmillis Road, Belfast BT9 5AG, UK.
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242
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Engström K, Shakeri M, Bäckvall JE. Dynamic Kinetic Resolution of β-Amino Esters by a Heterogeneous System of a Palladium Nanocatalyst and Candida antarctica Lipase A. European J Org Chem 2011. [DOI: 10.1002/ejoc.201001714] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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243
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Thalén LK, Sumic A, Bogár K, Norinder J, Persson AKÅ, Bäckvall JE. Enantioselective synthesis of α-methyl carboxylic acids from readily available starting materials via chemoenzymatic dynamic kinetic resolution. J Org Chem 2011; 75:6842-7. [PMID: 20857917 DOI: 10.1021/jo1011653] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An enantioselective method for the synthesis of α-methyl carboxylic acids starting from trans-cinnamaldehyde, a readily available and inexpensive compound, has been developed. Allylic alcohol 1 was obtained via a standard Grignard addition to trans-cinnamaldehyde. Dynamic kinetic resolution was applied to allylic alcohol 1 utilizing a ruthenium catalyst and either an (R)-selective lipase or an (S)-selective protease to provide the corresponding allylic esters in high yield and high ee. A copper-catalyzed allylic substitution was then applied to provide the corresponding alkenes with inversion of stereochemistry. Subsequent C-C double bond cleavage afforded pharmaceutically important α-methyl substituted carboxylic acids in high ee and overall yields of up to 76%.
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Affiliation(s)
- Lisa K Thalén
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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244
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Schuur B, Verkuijl BJ, Bokhove J, Minnaard AJ, de Vries JG, Heeres HJ, Feringa BL. Enantioselective liquid–liquid extraction of (R,S)-phenylglycinol using a bisnaphthyl phosphoric acid derivative as chiral extractant. Tetrahedron 2011. [DOI: 10.1016/j.tet.2010.11.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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248
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Shylesh S, Thiel WR. Bifunctional Acid-Base Cooperativity in Heterogeneous Catalytic Reactions: Advances in Silica Supported Organic Functional Groups. ChemCatChem 2010. [DOI: 10.1002/cctc.201000353] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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249
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Wang MZ, Zhou CY, Guo Z, Wong ELM, Wong MK, Che CM. Gold(I)-Catalyzed Enantioselective Intermolecular Hydroarylation of Allenes with Indoles and Reaction Mechanism by Density Functional Theory Calculations. Chem Asian J 2010; 6:812-24. [DOI: 10.1002/asia.201000651] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2010] [Indexed: 11/06/2022]
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250
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Arunkumar K, Reddy MA, Kumar TS, Kumar BV, Chandrasekhar KB, Kumar PR, Pal M. Achiral bis-imine in combination with CoCl₂: A remarkable effect on enantioselectivity of lipase-mediated acetylation of racemic secondary alcohol. Beilstein J Org Chem 2010; 6:1174-9. [PMID: 21160565 PMCID: PMC3002020 DOI: 10.3762/bjoc.6.134] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2010] [Accepted: 11/09/2010] [Indexed: 11/25/2022] Open
Abstract
A bis-imine (prepared via a new FeCl3-based method) in combination with CoCl2 facilitated lipase-mediated acetylation of the (R)-isomer of a racemic benzylic secondary alcohol with 91% ees. The methodology was used for the preparation of the known drug rivastigmine.
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Affiliation(s)
- K Arunkumar
- Custom Pharmaceutical Services, Dr. Reddy's Laboratories Limited, Bollaram Road Miyapur, Hyderabad 500 049, India
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