51
|
Zhou S, Wu KH, Chen CA, Gau HM. Highly Enantioselective Arylation of Aldehydes and Ketones Using AlArEt2(THF) as Aryl Sources. J Org Chem 2009; 74:3500-5. [DOI: 10.1021/jo900348p] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shuangliu Zhou
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan, and Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Kuo-Hui Wu
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan, and Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Chien-An Chen
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan, and Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Han-Mou Gau
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan, and Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| |
Collapse
|
52
|
Erdik E, Pekel ÖÖ. Reactivities of mixed organozinc and mixed organocopper reagents, 2. Selective n-alkyl transfer in tri-n-butylphosphine-catalyzed acylation of n-alkyl phenylzincs; an atom economic synthesis of n-alkyl aryl ketones. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.01.082] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
53
|
|
54
|
Liu X, Qiu L, Hong L, Yan W, Wang R. Enantioselective addition of thiophenylboronic acids to aldehydes using ZnEt2/Schiff-base catalytic system. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.tetasy.2009.02.059] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
55
|
Enantioselective addition of organozinc reagents to ketones catalyzed by grafted isoborneolsulfonamide polymers and titanium isopropoxide. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.tetasy.2009.01.011] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
56
|
Martínez R, Zoli L, Cozzi PG, Ramón DJ, Yus M. Synthesis of camphorsulfonamide-based quinoline ligands and their N-oxides: first use in the enantioselective addition of organozinc reagents to aldehydes. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.10.020] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
57
|
Muramatsu Y, Harada T. Catalytic Asymmetric Aryl Transfer Reactions to Aldehydes with Grignard Reagents as the Aryl Source. Chemistry 2008; 14:10560-3. [DOI: 10.1002/chem.200801612] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
58
|
Chen C, Wu K, Gau H. A New Aspect of Magnesium Bromide‐Promoted Enantioselective Aryl Additions of Triaryl(tetrahydrofuran)aluminum to Ketones Catalyzed by a Titanium(IV) Catalyst oftrans‐1,2‐Bis(hydroxycamphorsulfonylamino)cyclohexane. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200800169] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
59
|
Rodríguez-Escrich S, Reddy KS, Jimeno C, Colet G, Rodríguez-Escrich C, Solà L, Vidal-Ferran A, Pericàs MA. Structural Optimization of Enantiopure 2-Cyclialkylamino-2-aryl-1,1-diphenylethanols as Catalytic Ligands for Enantioselective Additions to Aldehydes. J Org Chem 2008; 73:5340-53. [DOI: 10.1021/jo800615d] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sergi Rodríguez-Escrich
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, E-43007 Tarragona, Spain, Department of Organic Chemistry, University of Barcelona, E-08028 Barcelona, Spain, and Catalan Institution for Research and Advanced Studies (ICREA), E-08010 Barcelona, Spain
| | - Katamreddy Subba Reddy
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, E-43007 Tarragona, Spain, Department of Organic Chemistry, University of Barcelona, E-08028 Barcelona, Spain, and Catalan Institution for Research and Advanced Studies (ICREA), E-08010 Barcelona, Spain
| | - Ciril Jimeno
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, E-43007 Tarragona, Spain, Department of Organic Chemistry, University of Barcelona, E-08028 Barcelona, Spain, and Catalan Institution for Research and Advanced Studies (ICREA), E-08010 Barcelona, Spain
| | - Gisela Colet
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, E-43007 Tarragona, Spain, Department of Organic Chemistry, University of Barcelona, E-08028 Barcelona, Spain, and Catalan Institution for Research and Advanced Studies (ICREA), E-08010 Barcelona, Spain
| | - Carles Rodríguez-Escrich
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, E-43007 Tarragona, Spain, Department of Organic Chemistry, University of Barcelona, E-08028 Barcelona, Spain, and Catalan Institution for Research and Advanced Studies (ICREA), E-08010 Barcelona, Spain
| | - Lluís Solà
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, E-43007 Tarragona, Spain, Department of Organic Chemistry, University of Barcelona, E-08028 Barcelona, Spain, and Catalan Institution for Research and Advanced Studies (ICREA), E-08010 Barcelona, Spain
| | - Anton Vidal-Ferran
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, E-43007 Tarragona, Spain, Department of Organic Chemistry, University of Barcelona, E-08028 Barcelona, Spain, and Catalan Institution for Research and Advanced Studies (ICREA), E-08010 Barcelona, Spain
| | - Miquel A. Pericàs
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, E-43007 Tarragona, Spain, Department of Organic Chemistry, University of Barcelona, E-08028 Barcelona, Spain, and Catalan Institution for Research and Advanced Studies (ICREA), E-08010 Barcelona, Spain
| |
Collapse
|
60
|
Wang MC, Wang XD, Ding X, Liu ZK. Catalytic asymmetric aryl transfer: highly enantioselective preparation of (R)- and (S)-diarylmethanols catalyzed by the same chiral ferrocenyl aziridino alcohol. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.01.040] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
61
|
Practical Implications of Boron-to-Zinc Transmetalation for the Catalytic Asymmetric Arylation of Aldehydes. Angew Chem Int Ed Engl 2008; 47:1098-101. [DOI: 10.1002/anie.200703103] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
62
|
Jimeno C, Sayalero S, Fjermestad T, Colet G, Maseras F, Pericàs M. Practical Implications of Boron-to-Zinc Transmetalation for the Catalytic Asymmetric Arylation of Aldehydes. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200703103] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
63
|
Erdik E, Pekel ÖÖ. Reactivities of mixed organozinc and mixed organocopper reagents: 1 – Solvent controlled organic group transfer from mixed diorganozincs. J Organomet Chem 2008. [DOI: 10.1016/j.jorganchem.2007.10.055] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
64
|
Wang MC, Zhang QJ, Zhao WX, Wang XD, Ding X, Jing TT, Song MP. Evaluation of enantiopure N-(ferrocenylmethyl)azetidin-2-yl(diphenyl)methanol for catalytic asymmetric addition of organozinc reagents to aldehydes. J Org Chem 2007; 73:168-76. [PMID: 18062701 DOI: 10.1021/jo701943x] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A facile and practical approach to preparation of enantiopure N-(ferrocenylmethyl)azetidin-2-yl(diphenyl)methanol was developed from cheap and easily available l-(+)-methionine. Synthetic highlights include the three-step, one-pot construction of the chiral azetidine ring and the development of an improved one-step procedure for the synthesis of the key intermediate l-2-amino-4-bromobutanoic acid. Enantiopure N-(ferrocenylmethyl)azetidin-2-yl(diphenyl)methanol was evaluated for catalytic asymmetric addition of organozinc reagents to aldehydes. The asymmetric ethylation, methylation, arylation, and alkynylation of aldehydes achieved enantioselectivity of up to 98.4%, 94.1%, 99.0%, and 84.6% ee, respectively, in the presence of a catalytic amount of chiral N-(ferrocenylmethyl)azetidin-2-yl(diphenyl)methanol. Our results demonstrated further that the four-membered heterocycle-based backbone was a good potential chiral unit for the catalytic asymmetric induction reaction, and the hindrance of the bulky ferrocenyl group, compared to a phenyl group, played an important role in the enantioselectivities. A possible transition for the catalytic asymmetric addition has been proposed on the basis of the crystal structure of the chiral ligand 3b including two HOAc molecules and previous studies.
Collapse
Affiliation(s)
- Min-Can Wang
- Department of Chemistry and Henan Key Laboratory of Chemical Biology and Organic Chemistry, Zhengzhou University, Zhengzhou, Henan 450052, PR China.
| | | | | | | | | | | | | |
Collapse
|
65
|
Kim JG, Walsh PJ. From aryl bromides to enantioenriched benzylic alcohols in a single flask: Catalytic asymmetric arylation of aldehydes. Angew Chem Int Ed Engl 2007; 45:4175-8. [PMID: 16721894 DOI: 10.1002/anie.200600741] [Citation(s) in RCA: 125] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jeung Gon Kim
- P. Roy and Diana T. Vagelos Laboratories, University of Pennsylvania, Department of Chemistry, 231 South 34th Street, Philadelphia, PA 19104-6323, USA
| | | |
Collapse
|
66
|
Zhong J, Guo H, Wang M, Yin M, Wang M. Asymmetric diethylzinc addition and phenyl transfer to aldehydes using chiral cis-cyclopropane-based amino alcohols. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.tetasy.2007.03.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
67
|
Schmidt F, Rudolph J, Bolm C. Diarylmethanols by Catalyzed Asymmetric Aryl Transfer Reactions onto Aldehydes Using Boronic Acids as Aryl Source. Adv Synth Catal 2007. [DOI: 10.1002/adsc.200600390] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
68
|
García J, Moyano A, Rosol M. An efficient, general synthesis of racemic 2-substituted ferrocenecarboxaldehydes. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.01.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
69
|
Gómez Arrayás R, Adrio J, Carretero JC. Chirale Ferrocenliganden in der asymmetrischen Katalyse. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200602482] [Citation(s) in RCA: 132] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
70
|
Gómez Arrayás R, Adrio J, Carretero JC. Recent Applications of Chiral Ferrocene Ligands in Asymmetric Catalysis. Angew Chem Int Ed Engl 2006; 45:7674-715. [PMID: 17115468 DOI: 10.1002/anie.200602482] [Citation(s) in RCA: 614] [Impact Index Per Article: 34.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Despite the impressive progress achieved in asymmetric catalysis during the last decade, an increasing number of new catalysts, ligands, and applications are reported every year to satisfy the need to embrace a wider range of reactions and to improve the efficiency of existing processes. Because of their availability, unique stereochemical aspects, and wide variety of coordination modes and possibilities for the fine-tuning of the steric and electronic properties, ferrocene-based ligands constitute one of the most versatile ligand architectures in the current scenario of asymmetric catalysis. Over the last few years ferrocene catalysts have been successfully applied in an amazing variety of enantioselective processes. This Review documents these recent advances, with special emphasis on the most innovative asymmetric processes and the development of novel, efficient types of ferrocene ligands.
Collapse
Affiliation(s)
- Ramón Gómez Arrayás
- Departamento de Química Orgánica, Universidad Autónoma de Madrid, Facultad de Ciencias, Cantoblanco, 28049 Madrid, Spain
| | | | | |
Collapse
|
71
|
|
72
|
Abstract
The design and implementation of cascade reactions is a challenging facet of organic chemistry, yet one that can impart striking novelty, elegance, and efficiency to synthetic strategies. The application of cascade reactions to natural products synthesis represents a particularly demanding task, but the results can be both stunning and instructive. This Review highlights selected examples of cascade reactions in total synthesis, with particular emphasis on recent applications therein. The examples discussed herein illustrate the power of these processes in the construction of complex molecules and underscore their future potential in chemical synthesis.
Collapse
Affiliation(s)
- K C Nicolaou
- Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
| | | | | |
Collapse
|
73
|
Kloetzing RJ, Krasovskiy A, Knochel P. The Mg-Oppenauer Oxidation as a Mild Method for the Synthesis of Aryl and Metallocenyl Ketones. Chemistry 2006; 13:215-27. [PMID: 17024705 DOI: 10.1002/chem.200600738] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Magnesium alkoxides undergo a hydride-transfer oxidation with benzaldehyde as the oxidant. This magnesium variant of the Oppenauer oxidation was used for the synthesis of polyfunctional biaryl ketones. LiCl was found to promote this reaction by enhancing the solubility of magnesium alkoxides. This mild oxidation method was especially useful for preparing ketones bearing a metallocenyl unit as well as various new ferrocenyl ketones and tricarbonylchromium complexes. This last class of ketones was reduced with the CBS catalyst (CBS=Corey-Bakshi-Shibata, diphenyl oxazaborolidine) to chiral benzhydrol complexes with high enantioselectivity enabling an asymmetric synthesis of electron-rich or -poor benzhydryl alcohols (up to 94 % ee).
Collapse
Affiliation(s)
- Ralf J Kloetzing
- Universität Zürich, Organisch-chemisches Institut, Winterthurerstrasse 190, 8057 Zürich, Switzerland
| | | | | |
Collapse
|
74
|
Braga AL, Milani P, Vargas F, Paixão MW, Sehnem JA. Modular chiral thiazolidine catalysts in asymmetric aryl transfer reactions. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.tetasy.2006.10.025] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
75
|
Polymer supported trans-1-phenylsulfonylamino-2-isoborneolsulfonylaminocyclohexane ligand for the titanium catalyzed organozinc addition to ketones. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.tetasy.2006.07.038] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
76
|
Kim JG, Walsh PJ. From Aryl Bromides to Enantioenriched Benzylic Alcohols in a Single Flask: Catalytic Asymmetric Arylation of Aldehydes. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200600741] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
77
|
Forrat VJ, Prieto O, Ramón DJ, Yus M. trans-1-Sulfonylamino-2-isoborneolsulfonylaminocyclohexane Derivatives: Excellent Chiral Ligands for the Catalytic Enantioselective Addition of Organozinc Reagents to Ketones. Chemistry 2006; 12:4431-45. [PMID: 16575932 DOI: 10.1002/chem.200501397] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The catalytic enantioselective addition of different organozinc reagents (such as alkyl and aryl derivatives or in situ generated aryl, allyl alkenyl, and alkynyl derivatives obtained through different transmetallation processes) to simple ketones has been accomplished by using titanium tetraisopropoxide and chiral ligands derived from substituted trans-1-sulfonylamino-2-isoborneolsulfonylaminocyclohexane, producing the corresponding tertiary alcohols with enantiomeric excesses (ee) up to >99 %. A simple and efficient procedure for the synthesis of the chiral ligands used in these reactions is described.
Collapse
Affiliation(s)
- Vicente J Forrat
- Instituto de Síntesis Orgánica (ISO) and Departamento de Química Orgánica. Facultad de Ciencias, Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
| | | | | | | |
Collapse
|
78
|
Schiffers I, Rantanen T, Schmidt F, Bergmans W, Zani L, Bolm C. Resolution of Racemic 2-Aminocyclohexanol Derivatives and Their Application as Ligands in Asymmetric Catalysis. J Org Chem 2006; 71:2320-31. [PMID: 16526780 DOI: 10.1021/jo052433w] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A preparatively easy and efficient protocol for the resolution of racemic 2-aminocyclohexanol derivatives is described, delivering both enantiomers with >99% enantiomeric excess (ee) by sequential use of (R)- and (S)-mandelic acid. A simple aqueous workup procedure permits the isolation of the amino alcohols in analytically pure form and the almost quantitative recovery of mandelic acid. Debenzylation of enantiopure trans-2-(N-benzyl)amino-1-cyclohexanol by hydrogenation and subsequent derivatization give access to a broad variety of diversely substituted derivatives. Furthermore, the corresponding cis isomers are readily available. Applications of these optically active aminocyclohexanols in catalyzed asymmetric phenyl transfer reactions to benzaldehydes and transfer hydrogenations of aryl ketones lead to products with up to 96% ee.
Collapse
Affiliation(s)
- Ingo Schiffers
- Institut für Organische Chemie der RWTH Aachen, Landoltweg 1, D-52056 Aachen, Germany
| | | | | | | | | | | |
Collapse
|
79
|
Forrat VJ, Ramón DJ, Yus M. Chiral tertiary alcohols from a trans-1-arenesulfonyl-amino-2-isoborneolsulfonylaminocyclohexane-catalyzed addition of organozincs to ketones. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.tetasy.2005.08.031] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
80
|
Ito K, Tomita Y, Katsuki T. Enantioselective phenyl transfer to aldehydes using 1,1′-bi-2-naphthol-3,3′-dicarboxamide as chiral auxiliary. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.06.161] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
81
|
Liu XY, Wu XY, Chai Z, Wu YY, Zhao G, Zhu SZ. Highly Effective and Recyclable Dendritic Ligands for the Enantioselective Aryl Transfer Reactions to Aldehydes. J Org Chem 2005; 70:7432-5. [PMID: 16122271 DOI: 10.1021/jo050994h] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] A series of chiral pyrrolidinylmethanol-based dendritic ligands were synthesized for application in enantioselective aryl transfer reactions to aldehydes with the (ArBO)3/ZnEt2 system in up to 98% ee.
Collapse
Affiliation(s)
- Xin Yuan Liu
- Laboratory of Modern Synthetic Organic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, PR China
| | | | | | | | | | | |
Collapse
|
82
|
Catalyzed asymmetric aryl transfer reactions to aldehydes with boroxines as aryl source. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.tetasy.2005.06.010] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|