1
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Xu X, Song L, Feng H, Van der Eycken EV. Direct Access to 4-Substituted Isoquinolones via a Sequential Pd-Catalyzed Cyclization/Base-Promoted Aromatization/Ring-Opening of N-Propargyl-1,3-oxazolidines. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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2
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Wang Z, Yang C, Chen J, Yang F, Khan R, Yang Y, Qiao X, Su Z, Fan B. Asymmetric Transfer Hydrogenation of Trifluoromethylated Imines to Chiral
α
‐Trifluoromethylated Amines With Alcohol as The Hydrogen Source. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zheting Wang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources Yunnan Minzu University Yuehua Street Kunming 650500 P. R. China
| | - Chunhui Yang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources Yunnan Minzu University Yuehua Street Kunming 650500 P. R. China
| | - Jingchao Chen
- Key Laboratory of Chemistry in Ethnic Medicinal Resources Yunnan Minzu University Yuehua Street Kunming 650500 P. R. China
| | - Fan Yang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources Yunnan Minzu University Yuehua Street Kunming 650500 P. R. China
| | - Ruhima Khan
- Key Laboratory of Chemistry in Ethnic Medicinal Resources Yunnan Minzu University Yuehua Street Kunming 650500 P. R. China
| | - Yong Yang
- Chongqing Key Laboratory of traditional Chinese medicine health Chongqing Academy of Chinese Materia Medica Chongqing P. R. China
| | - Xingfang Qiao
- Chongqing Key Laboratory of traditional Chinese medicine health Chongqing Academy of Chinese Materia Medica Chongqing P. R. China
| | - Zhimin Su
- Chongqing Key Laboratory of traditional Chinese medicine health Chongqing Academy of Chinese Materia Medica Chongqing P. R. China
| | - Baomin Fan
- Key Laboratory of Chemistry in Ethnic Medicinal Resources Yunnan Minzu University Yuehua Street Kunming 650500 P. R. China
- Chongqing Key Laboratory of traditional Chinese medicine health Chongqing Academy of Chinese Materia Medica Chongqing P. R. China
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3
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Claraz A, Djian A, Masson G. Electrochemical tandem trifluoromethylation of allylamines/formal (3 + 2)-cycloaddition for the rapid access to CF3-containing imidazolines and oxazolidines. Org Chem Front 2021. [DOI: 10.1039/d0qo01307b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A straightforward and environmentally friendly synthesis of CF3-containing imidazolines and oxazolidines has been developed through an electrochemical three-component reaction among allylamines, the Langlois reagent, and nitrile or carbonyl compounds.
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Affiliation(s)
- Aurélie Claraz
- Institut de Chimie des Substances Naturelles
- Université Paris Saclay
- CNRS
- UPR2301
- 91198 Gif-sur-Yvette cedex
| | - Aurélie Djian
- Institut de Chimie des Substances Naturelles
- Université Paris Saclay
- CNRS
- UPR2301
- 91198 Gif-sur-Yvette cedex
| | - Géraldine Masson
- Institut de Chimie des Substances Naturelles
- Université Paris Saclay
- CNRS
- UPR2301
- 91198 Gif-sur-Yvette cedex
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4
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Zhang Y, Huang L, Li X, Wang L, Feng H. Chemo- and Diastereoselective Synthesis of N-Propargyl Oxazolidines through a Copper-Catalyzed Domino A3 Reaction. J Org Chem 2019; 84:5046-5055. [DOI: 10.1021/acs.joc.8b03244] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Yazhen Zhang
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
| | - Liliang Huang
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
| | - Xiaoyang Li
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
| | - Le Wang
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
| | - Huangdi Feng
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
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5
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Singh N, Dar AA, Kumar A. A Simple and Efficient Approach for the Synthesis of 1,3-Oxazolidines from β-Amino Alcohols Using Grinding Technique. ChemistrySelect 2018. [DOI: 10.1002/slct.201802369] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Nasseb Singh
- Synthetic Organic Chemistry Laboratory; Faculty of Sciences; Shri Mata Vaishno Devi University Katra; Jammu and Kashmir - 182320 India
| | - Alamgir A. Dar
- Bioorganic Chemistry Division; CSIR-Indian Institute of Integrative Medicine; Canal Road, Jammu Tawi, J & K 180 001 India
- Research Centre for Residue and Quality Analysis; Sher-e-Kashmir University of Agricultural Sciences & Technology Kashmir; Srinagar - 190025, J & K India
| | - Anil Kumar
- Synthetic Organic Chemistry Laboratory; Faculty of Sciences; Shri Mata Vaishno Devi University Katra; Jammu and Kashmir - 182320 India
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6
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Hou Y, Qin M, Yang X, Shen Q, Zhao Y, Liu Y, Gong P. Palladium-catalyzed three-component tandem cyclization of buta-2,3-dien-1-ol, aryl iodides, and imines: an efficient protocol for the synthesis of oxazolidine derivatives. RSC Adv 2017. [DOI: 10.1039/c6ra27993g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
An efficient three-component tandem cyclization reaction for the synthesis of highly substituted oxazolidines was achieved through the Pd0-catalyzed cyclization of buta-2,3-dien-1-ol with aryl iodides and imines.
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Affiliation(s)
- Yunlei Hou
- Key Laboratory of Structure-based Drug Design and Discovery (Shenyang Pharmaceutical University)
- Ministry of Education
- Shenyang 110016
- People's Republic of China
| | - Mingze Qin
- Key Laboratory of Structure-based Drug Design and Discovery (Shenyang Pharmaceutical University)
- Ministry of Education
- Shenyang 110016
- People's Republic of China
| | - Xiuxiu Yang
- Key Laboratory of Structure-based Drug Design and Discovery (Shenyang Pharmaceutical University)
- Ministry of Education
- Shenyang 110016
- People's Republic of China
| | - Qi Shen
- Key Laboratory of Structure-based Drug Design and Discovery (Shenyang Pharmaceutical University)
- Ministry of Education
- Shenyang 110016
- People's Republic of China
| | - Yanfang Zhao
- Key Laboratory of Structure-based Drug Design and Discovery (Shenyang Pharmaceutical University)
- Ministry of Education
- Shenyang 110016
- People's Republic of China
| | - Yajing Liu
- Key Laboratory of Structure-based Drug Design and Discovery (Shenyang Pharmaceutical University)
- Ministry of Education
- Shenyang 110016
- People's Republic of China
| | - Ping Gong
- Key Laboratory of Structure-based Drug Design and Discovery (Shenyang Pharmaceutical University)
- Ministry of Education
- Shenyang 110016
- People's Republic of China
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7
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Wu M, Cheng T, Ji M, Liu G. Ru-Catalyzed Asymmetric Transfer Hydrogenation of α-Trifluoromethylimines. J Org Chem 2015; 80:3708-13. [DOI: 10.1021/acs.joc.5b00177] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Meng Wu
- Key Laboratory
of Resource
Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare
Earth Functional Materials, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Tanyu Cheng
- Key Laboratory
of Resource
Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare
Earth Functional Materials, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Min Ji
- Key Laboratory
of Resource
Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare
Earth Functional Materials, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Guohua Liu
- Key Laboratory
of Resource
Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare
Earth Functional Materials, Shanghai Normal University, Shanghai 200234, P. R. China
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8
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Orcel U, Waser J. Palladium-catalyzed vicinal amino alcohols synthesis from allyl amines by in situ tether formation and carboetherification. Angew Chem Int Ed Engl 2015; 54:5250-4. [PMID: 25720966 DOI: 10.1002/anie.201500636] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Indexed: 11/06/2022]
Abstract
Vicinal amino alcohols are important structural motifs of bioactive compounds. Reported herein is an efficient method for their synthesis based on the palladium-catalyzed oxy-alkynylation, oxy-arylation, or oxy-vinylation of allylic amines. High regio- and stereoselectivity were ensured through the in situ formation of a hemiaminal tether using the cheap commercially available trifluoroacetaldehyde in its hemiacetal form. The obtained compounds are important building blocks, which can be orthogonally deprotected to give either free alcohols, amines, or terminal alkynes.
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Affiliation(s)
- Ugo Orcel
- Laboratory of Catalysis and Organic Synthesis, Ecole Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCSO, BCH 4306, 1015 Lausanne (Switzerland) http://lcso.epfl.ch/
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9
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Orcel U, Waser J. Palladium-Catalyzed Vicinal Amino Alcohols Synthesis from Allyl Amines by In Situ Tether Formation and Carboetherification. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201500636] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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10
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Zhang M, Li H, Chen P, Sun W, Zhang L, Yan P. Self-assembly of 2-aldehyde-8-hydroxyquinolinate-based lanthanide complexes and NIR luminescence. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.10.033] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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11
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Richers M, Breugst M, Platonova AY, Ullrich A, Dieckmann A, Houk KN, Seidel D. Redox-neutral α-oxygenation of amines: reaction development and elucidation of the mechanism. J Am Chem Soc 2014; 136:6123-35. [PMID: 24689802 PMCID: PMC4333595 DOI: 10.1021/ja501988b] [Citation(s) in RCA: 110] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Indexed: 12/19/2022]
Abstract
Cyclic secondary amines and 2-hydroxybenzaldehydes or related ketones react to furnish benzo[e][1,3]oxazine structures in generally good yields. This overall redox-neutral amine α-C-H functionalization features a combined reductive N-alkylation/oxidative α-functionalization and is catalyzed by acetic acid. In contrast to previous reports, no external oxidants or metal catalysts are required. Reactions performed under modified conditions lead to an apparent reductive amination and the formation of o-hydroxybenzylamines in a process that involves the oxidation of a second equivalent of amine. A detailed computational study employing density functional theory compares different mechanistic pathways and is used to explain the observed experimental findings. Furthermore, these results also reveal the origin of the catalytic efficiency of acetic acid in these transformations.
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Affiliation(s)
- Matthew
T. Richers
- Department
of Chemistry and Chemical Biology, Rutgers,
The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Martin Breugst
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, California 90095, United States
- Department
für Chemie, Universität zu
Köln, Greinstraße
4, 50939 Köln, Germany
| | - Alena Yu. Platonova
- Department
of Chemistry and Chemical Biology, Rutgers,
The State University of New Jersey, Piscataway, New Jersey 08854, United States
- Department
of Organic Synthesis Technology, Ural Federal
University, Yekaterinburg 620002, Russia
| | - Anja Ullrich
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, California 90095, United States
- Institut
für Bioorganische Chemie, Heinrich-Heine
Universität Düsseldorf, Stetternicher Forst, 52426 Jülich, Germany
| | - Arne Dieckmann
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, California 90095, United States
| | - K. N. Houk
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, California 90095, 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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12
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Deutsch A, Glas H, Hoffmann-Röder A, Deutsch C. Synthesis of functionalized α-trifluoroethyl amine scaffolds via Grignard addition to N-aryl hemiaminal ethers. RSC Adv 2014. [DOI: 10.1039/c3ra47708h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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13
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Grellepois F, Ben Jamaa A, Gassama A. Diastereoselective Addition of Organomagnesium and Organolithium Reagents to Chiral TrifluoromethylN-tert-Butanesulfinyl Hemiaminals. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300890] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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14
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Polat MF, Hettmanczyk L, Zhang W, Szabo Z, Franzén J. One-Pot, Two-Step Protocol for the Catalytic Asymmetric Synthesis of Optically Active N,O- and O,O-Acetals. ChemCatChem 2013. [DOI: 10.1002/cctc.201200860] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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15
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Al-Masum M, Lott BW, Ghazialsharif N. An Efficient Reaction Process for the Synthesis of Oxazinanes, and Oxazolidines in the Presence of Air. ACTA ACUST UNITED AC 2012. [DOI: 10.4236/ijoc.2012.24049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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16
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Simon J, Chelain E, Brigaud T. Highly Diastereoselective Synthesis of Enantiopure β-Trifluoromethyl β-Amino Alcohols from Chiral Trifluoromethyl Oxazolidines (Fox). Org Lett 2011; 14:604-7. [DOI: 10.1021/ol2032174] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Julien Simon
- Laboratoire “Synthèse Organique Sélective et Chimie bioOrganique” (SOSCO), Université de Cergy-Pontoise, 5 Mail Gay-Lussac 95000 Cergy-Pontoise cedex, France
| | - Evelyne Chelain
- Laboratoire “Synthèse Organique Sélective et Chimie bioOrganique” (SOSCO), Université de Cergy-Pontoise, 5 Mail Gay-Lussac 95000 Cergy-Pontoise cedex, France
| | - Thierry Brigaud
- Laboratoire “Synthèse Organique Sélective et Chimie bioOrganique” (SOSCO), Université de Cergy-Pontoise, 5 Mail Gay-Lussac 95000 Cergy-Pontoise cedex, France
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17
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Prakash GKS, Paknia F, Mathew T, Mlostoń G, Joschek JP, Olah GA. Fluoroanalogs of DDT: Superacidic BF3–H2O Catalyzed Facile Synthesis of 1,1,1-Trifluoro-2,2-diarylethanes and 1,1-Difluoro-2,2-diarylethanes. Org Lett 2011; 13:4128-31. [DOI: 10.1021/ol201669a] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Wu X, Li L, Zhang J. Nickel(II)-catalyzed diastereoselective [3+2] cycloaddition of N-tosyl-aziridines and aldehydes via selective carbon-carbon bond cleavage. Chem Commun (Camb) 2011; 47:7824-6. [PMID: 21655580 DOI: 10.1039/c1cc12189h] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
An efficient and mild Ni(ClO(4))(2)-catalyzed [3+2] cycloaddition of N-tosylaziridines and aldehydes via C-C bond cleavage was developed. The cycloaddition reaction proceeds with high diastereoselectivity and regioselectivity leading to highly substituted 1,3-oxazolidines. Notably, this novel reaction can be easily expanded to gram level scale and the thermal conditions cannot achieve the same transformation.
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Affiliation(s)
- Xingxing Wu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, China
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19
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Coyle S, Glaser R. Asymmetric Imine N-Inversion in 3-Methyl-4-pyrimidinimine. Molecular Dipole Analysis of Solvation Effects. J Org Chem 2011; 76:3987-96. [DOI: 10.1021/jo200411f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Stephanie Coyle
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Rainer Glaser
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
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20
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Nie J, Guo HC, Cahard D, Ma JA. Asymmetric construction of stereogenic carbon centers featuring a trifluoromethyl group from prochiral trifluoromethylated substrates. Chem Rev 2010; 111:455-529. [PMID: 21117644 DOI: 10.1021/cr100166a] [Citation(s) in RCA: 870] [Impact Index Per Article: 62.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jing Nie
- Department of Chemistry, Tianjin University, China
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21
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22
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Chen MW, Duan Y, Chen QA, Wang DS, Yu CB, Zhou YG. Enantioselective Pd-Catalyzed Hydrogenation of Fluorinated Imines: Facile Access to Chiral Fluorinated Amines. Org Lett 2010; 12:5075-7. [DOI: 10.1021/ol1020256] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mu-Wang Chen
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Ying Duan
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Qing-An Chen
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Duo-Sheng Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Chang-Bin Yu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Yong-Gui Zhou
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
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23
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Fernández I, Valdivia V, Alcudia A, Chelouan A, Khiar N. Enantiodivergent Approach to Trifluoromethylated Amines: A Concise Route to Both Enantiomeric Analogues of Calcimimetic NPS R-568. European J Org Chem 2010. [DOI: 10.1002/ejoc.200901158] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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24
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Glaser R, Yin J, Miller S. Asymmetry in the N-Inversion of Heteroarene Imines: Pyrimidin-4(3H)-Imine, Pyridin-2(1H)-Imine, and 1H-Purine-6(9H)-Imine. J Org Chem 2010; 75:1132-42. [DOI: 10.1021/jo902358c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rainer Glaser
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211
| | - Jian Yin
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211
| | - Stephanie Miller
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211
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25
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Harper S, Ferrara M, Crescenzi B, Pompei M, Palumbi MC, DiMuzio JM, Donghi M, Fiore F, Koch U, Liverton NJ, Pesci S, Petrocchi A, Rowley M, Summa V, Gardelli C. Inhibitors of the Hepatitis C Virus NS3 Protease with Basic Amine Functionality at the P3-Amino Acid N-Terminus: Discovery and Optimization of a New Series of P2−P4 Macrocycles. J Med Chem 2009; 52:4820-37. [DOI: 10.1021/jm900372w] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Steven Harper
- IRBM (Merck Research Laboratories Rome), Via Pontina km 30,600, 00040 Pomezia, Rome, Italy
| | - Marco Ferrara
- IRBM (Merck Research Laboratories Rome), Via Pontina km 30,600, 00040 Pomezia, Rome, Italy
| | - Benedetta Crescenzi
- IRBM (Merck Research Laboratories Rome), Via Pontina km 30,600, 00040 Pomezia, Rome, Italy
| | - Marco Pompei
- IRBM (Merck Research Laboratories Rome), Via Pontina km 30,600, 00040 Pomezia, Rome, Italy
| | - Maria Cecilia Palumbi
- IRBM (Merck Research Laboratories Rome), Via Pontina km 30,600, 00040 Pomezia, Rome, Italy
| | - Jillian M. DiMuzio
- IRBM (Merck Research Laboratories Rome), Via Pontina km 30,600, 00040 Pomezia, Rome, Italy
| | - Monica Donghi
- IRBM (Merck Research Laboratories Rome), Via Pontina km 30,600, 00040 Pomezia, Rome, Italy
| | - Fabrizio Fiore
- IRBM (Merck Research Laboratories Rome), Via Pontina km 30,600, 00040 Pomezia, Rome, Italy
| | - Uwe Koch
- IRBM (Merck Research Laboratories Rome), Via Pontina km 30,600, 00040 Pomezia, Rome, Italy
| | - Nigel J. Liverton
- IRBM (Merck Research Laboratories Rome), Via Pontina km 30,600, 00040 Pomezia, Rome, Italy
| | - Silvia Pesci
- IRBM (Merck Research Laboratories Rome), Via Pontina km 30,600, 00040 Pomezia, Rome, Italy
| | - Alessia Petrocchi
- IRBM (Merck Research Laboratories Rome), Via Pontina km 30,600, 00040 Pomezia, Rome, Italy
| | - Michael Rowley
- IRBM (Merck Research Laboratories Rome), Via Pontina km 30,600, 00040 Pomezia, Rome, Italy
| | - Vincenzo Summa
- IRBM (Merck Research Laboratories Rome), Via Pontina km 30,600, 00040 Pomezia, Rome, Italy
| | - Cristina Gardelli
- IRBM (Merck Research Laboratories Rome), Via Pontina km 30,600, 00040 Pomezia, Rome, Italy
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26
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Hughes G, O'Shea P, Goll J, Gauvreau D, Steele J. Nucleophilic displacements of non-racemic α-trifluoromethyl benzylic triflates. Tetrahedron 2009. [DOI: 10.1016/j.tet.2008.12.064] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Rhodium-catalyzed diastereoselective 1,2-addition of arylboronic acids to chiral trifluoroethyl imine. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.01.112] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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28
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Sini G, Tessier A, Pytkowicz J, Brigaud T. Fluorine... and pi...alkali metal interactions control in the stereoselective amide enolate alkylation with fluorinated oxazolidines (Fox) as a chiral auxiliary: an experimental and theoretical study. Chemistry 2008; 14:3363-70. [PMID: 18283703 DOI: 10.1002/chem.200701604] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The alpha-alkylation of amide enolates by using a pseudo-C(2) symmetry trans 4-phenyl-2-trifluoromethyloxazolidine (trans-Fox) as a chiral auxiliary occurs with an extremely high diastereoselectivity (>99 % de). The origin of this excellent stereocontrol was investigated by an experimental and theoretical (DFT) study. With this trans chiral auxiliary, both F...metal and pi...metal interactions compete to give the same diastereomer through Re face alkylation of the enolate. A 5.5 kcal mol(-1) energy difference found between the Re face and the Si face attack transition states is consistent with the complete diastereoselectivity that has been experimentally achieved. On the other hand, in the case of the cis chiral auxiliary (cis-Fox) the competition between the F...metal and pi...metal interactions is unfavourable to the diastereoselectivity. In this case, the Re face and the Si face attack transition states were found to be nearly isoenergetic (0.3 kcal mol(-1) difference), which is in good agreement with the very low diastereoselectivity observed.
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Affiliation(s)
- Gjergji Sini
- Laboratoire LPPI, Université de Cergy-Pontoise, 5 Mail Gay-Lussac, Neuville sur Oise, Cergy-Pontoise cedex, France.
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29
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Huguenot F, Billac A, Brigaud T, Portella C. Umpolung Reactivity of Difluoroenol Silyl Ethers with Amines and Amino Alcohols. Application to the Synthesis of Enantiopure α-Difluoromethyl Amines and Amino Acids. J Org Chem 2008; 73:2564-9. [DOI: 10.1021/jo702328v] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Florent Huguenot
- Institut de Chimie Moléculaire de Reims, CNRS - Université de Reims Champagne-Ardenne (UMR 6229), Faculté des Sciences, B.P. 1039, 51687 Reims Cedex 2, France, and Laboratoire “ Synthèse Organique Sélective et Chimie Organométallique ” (SOSCO), UMR CNRS 8123, Université de Cergy-Pontoise, 5 Mail Gay-Lussac, Neuville sur Oise, 95031 Cergy-Pontoise Cedex, France
| | - Anne Billac
- Institut de Chimie Moléculaire de Reims, CNRS - Université de Reims Champagne-Ardenne (UMR 6229), Faculté des Sciences, B.P. 1039, 51687 Reims Cedex 2, France, and Laboratoire “ Synthèse Organique Sélective et Chimie Organométallique ” (SOSCO), UMR CNRS 8123, Université de Cergy-Pontoise, 5 Mail Gay-Lussac, Neuville sur Oise, 95031 Cergy-Pontoise Cedex, France
| | - Thierry Brigaud
- Institut de Chimie Moléculaire de Reims, CNRS - Université de Reims Champagne-Ardenne (UMR 6229), Faculté des Sciences, B.P. 1039, 51687 Reims Cedex 2, France, and Laboratoire “ Synthèse Organique Sélective et Chimie Organométallique ” (SOSCO), UMR CNRS 8123, Université de Cergy-Pontoise, 5 Mail Gay-Lussac, Neuville sur Oise, 95031 Cergy-Pontoise Cedex, France
| | - Charles Portella
- Institut de Chimie Moléculaire de Reims, CNRS - Université de Reims Champagne-Ardenne (UMR 6229), Faculté des Sciences, B.P. 1039, 51687 Reims Cedex 2, France, and Laboratoire “ Synthèse Organique Sélective et Chimie Organométallique ” (SOSCO), UMR CNRS 8123, Université de Cergy-Pontoise, 5 Mail Gay-Lussac, Neuville sur Oise, 95031 Cergy-Pontoise Cedex, France
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30
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Tessier A, Pytkowicz J, Brigaud T. Chiral 4-phenyl-2-trifluoromethyloxazolidine: a high-performance chiral auxiliary for the alkylation of amides. Angew Chem Int Ed Engl 2007; 45:3677-81. [PMID: 16639757 DOI: 10.1002/anie.200600738] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Arnaud Tessier
- Laboratoire Synthèse Organique Sélective et Chimie Organométallique (SOSCO), UMR CNRS 8123, Université de Cergy-Pontoise, 5 Mail Gay-Lussac, Neuville sur Oise, 95031 Cergy-Pontoise cedex, France
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31
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Wang J, Rochon FD, Yang Y, Hua L, Kayser MM. Synthesis of oxazolidines using DMSO/P4O10 as a formaldehyde equivalent. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.tetasy.2007.04.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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32
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Hughes G, Devine P, Naber J, O'Shea P, Foster B, McKay D, Volante R. Diastereoselective Reductive Amination of Aryl Trifluoromethyl Ketones and α-Amino Esters. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200603745] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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33
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Hughes G, Devine PN, Naber JR, O'shea PD, Foster BS, McKay DJ, Volante RP. Diastereoselective Reductive Amination of Aryl Trifluoromethyl Ketones and α-Amino Esters. Angew Chem Int Ed Engl 2007; 46:1839-42. [PMID: 17450610 DOI: 10.1002/anie.200603745] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Greg Hughes
- Merck Frosst, Process Research, 16711 Trans Canada Highway, Kirkland H9H 3L1, Canada.
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34
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Billard T, Langlois BR. How to Reach Stereogenic Trifluoromethylated Carbon? En Route to the “Grail” of the Asymmetric Trifluoromethylation Reaction. European J Org Chem 2007. [DOI: 10.1002/ejoc.200600643] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Thierry Billard
- Laboratoire SERCOF (UMR CNRS 5181), Université Claude Bernard – Lyon 1, Bat Chevreul, 43 Bd du 11 novembre 1918, 69622 Villeurbanne, France
| | - Bernard R. Langlois
- Laboratoire SERCOF (UMR CNRS 5181), Université Claude Bernard – Lyon 1, Bat Chevreul, 43 Bd du 11 novembre 1918, 69622 Villeurbanne, France
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35
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Truong VL, Ménard MS, Ménard MS, Dion I. Asymmetric Syntheses of 1-Aryl-2,2,2-trifluoroethylamines via Diastereoselective 1,2-Addition of Arylmetals to 2-Methyl-N-(2,2,2-trifluoroethylidene)propane-2-sulfinamide. Org Lett 2007; 9:683-5. [PMID: 17256870 DOI: 10.1021/ol063001q] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Condensation of N-tert-butanesulfinamide (S)-1 with trifluoroacetaldehyde hydrate 2a afforded 2-methyl-N-(2,2,2-trifluoroethylidene)propane-2-sulfinamide 3. Without isolation and purification, imine 3 was added to various aryllithium reagents to give highly diastereomerically enriched adducts 5a-g. Acidic methanolysis of 5a-g provided the desired 1-aryl-2,2,2-trifluoroethylamine hydrochloride compounds 6a-g. [reaction: see text].
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Affiliation(s)
- Vouy Linh Truong
- Department of Medicinal Chemistry, Merck Frosst Centre for Therapeutic Research, 16711 Trans Canada Highway, Kirkland, Québec H9H 3L1, Canada.
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36
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Affiliation(s)
- Judit Tóth
- a Research Group of the Hungarian Academy of Sciences, Department of Organic Chemical Technology , Technical University of Budapest , Budapest, Hungary
| | | | | | - László Tőke
- a Research Group of the Hungarian Academy of Sciences, Department of Organic Chemical Technology , Technical University of Budapest , Budapest, Hungary
| | - Miklós Nyerges
- a Research Group of the Hungarian Academy of Sciences, Department of Organic Chemical Technology , Technical University of Budapest , Budapest, Hungary
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37
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Lauzon C, Charette AB. Catalytic Asymmetric Synthesis of α,α,α-Trifluoromethylamines by the Copper-Catalyzed Nucleophilic Addition of Diorganozinc Reagents to Imines. Org Lett 2006; 8:2743-5. [PMID: 16774246 DOI: 10.1021/ol0607847] [Citation(s) in RCA: 129] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] A copper-catalyzed asymmetric addition of diorganozinc reagents to N-phosphinoylimines has been developed for the synthesis of chiral alpha,alpha,alpha-trifluoromethylamines. The trifluoromethyl ketimines, generated in situ from the corresponding hemiaminals, led to the chiral amides in high yields (71-89%) and excellent enantiocontrol (91-99% ee).
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Affiliation(s)
- Caroline Lauzon
- Département de Chimie, Université de Montréal, Station Downtown, Québec, Canada
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38
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Tessier A, Pytkowicz J, Brigaud T. Chiral 4-Phenyl-2-trifluoromethyloxazolidine: A High-Performance Chiral Auxiliary for the Alkylation of Amides. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200600738] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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39
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Roy A, Gosselin F, O'Shea PD, Chen CY. Diastereoselective Arylithium Addition to an α-Trifluoromethyl Imine. Practical Synthesis of a Potent Cathepsin K Inhibitor. J Org Chem 2006; 71:4320-3. [PMID: 16709080 DOI: 10.1021/jo052430j] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A practical, chromatography-free synthesis of potent cathepsin K inhibitor 1 is described. The addition of 4-bromophenyllithium to an alpha-trifluoromethylimine derived from commercially available (S)-leucinol was accomplished in a highly diastereoselective manner (97.6% de, 91% yield). Subsequent Suzuki cross-coupling afforded biaryl 7. Oxidation of the alcohol and sulfide functionalities led to the formation of carboxylic acid 8. Crystallization of 7 and acid 8 as its dicyclohexylamine salt gave excellent impurity rejection. The final amide coupling with commercially available aminoacetonitrile hydrochloride afforded 1 in excellent purity (99.6A% by HPLC, 100% de, <3 ppm Pd, W, Cr).
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Affiliation(s)
- Amélie Roy
- Department of Process Research, Merck Frosst Centre for Therapeutic Research, 16711 Trans Canada Highway, Kirkland, Québec H9H 3L1, Canada.
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40
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Saitoh F, Nishida H, Mukaihira T, Aikawa K, Mikami K. Asymmetric Synthesis of Antithrombotic Agent M55529: The First Enantioselective CyclicN,O-Acetal Formation. European J Org Chem 2006. [DOI: 10.1002/ejoc.200600124] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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41
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Li CS, Deschenes D, Desmarais S, Falgueyret JP, Gauthier JY, Kimmel DB, Léger S, Massé F, McGrath ME, McKay DJ, Percival MD, Riendeau D, Rodan SB, Thérien M, Truong VL, Wesolowski G, Zamboni R, Black WC. Identification of a potent and selective non-basic cathepsin K inhibitor. Bioorg Med Chem Lett 2006; 16:1985-9. [PMID: 16413777 DOI: 10.1016/j.bmcl.2005.12.071] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2005] [Revised: 12/16/2005] [Accepted: 12/20/2005] [Indexed: 11/26/2022]
Abstract
Based on our previous study with trifluoroethylamine as a P2-P3 amide isostere of cathepsin K inhibitor, further optimization led to identification of compound 22 (L-873724) as a potent and selective non-basic cathepsin K inhibitor. This compound showed excellent pharmacokinetics and efficacy in an ovariectomized (OVX) rhesus monkey model. The volumes of distribution close to unity were consistent with this compound not being lysosomotropic, which is a characteristic of basic cathepsin K inhibitors.
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Affiliation(s)
- Chun Sing Li
- Merck Frosst Centre for Therapeutic Research, PO Box 1005, Pointe-Claire-Dorval, Que., Canada H9R 4P8.
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42
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Asymmetric addition reactions of Grignard reagents to chiral 2-trifluoromethyl tert-butyl (Ellman) sulfinimine–ethanol adducts. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.01.154] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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43
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Huguenot F, Brigaud T. Convenient Asymmetric Synthesis of β-Trifluoromethyl-β-amino Acid, β-Amino Ketones, and γ-Amino Alcohols via Reformatsky and Mannich-Type Reactions from 2-Trifluoromethyl-1,3-oxazolidines. J Org Chem 2006; 71:2159-62. [PMID: 16497009 DOI: 10.1021/jo052323p] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The stereoselective syntheses of beta-trifluoromethyl-beta-amino ester, beta lactams, and beta-amino ketones starting from an oxazolidine derived from trifluoroacetaldehyde hemiacetal and (R)-phenylglycinol are reported. The Mannich-type reaction involving a chiral fluorinated iminium ion occurred in a good yield and with a higher stereoselectivity (dr up to 96:4) than that of the Reformatsky-type reaction. This straightforward strategy was applied to the short syntheses of (R)-3-amino-4,4,4-trifluorobutanoic acid, a series of novel enantiopure unprotected fluorinated beta-amino ketones, and their corresponding gamma-amino alcohols.
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Affiliation(s)
- Florent Huguenot
- Laboratoire Réactions Sélectives et Applications, UMR CNRS 6519, Université de Reims-Champagne-Ardenne, Faculté des Sciences, BP 1039, 51687 Reims Cedex 2, France
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44
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Black WC, Bayly CI, Davis DE, Desmarais S, Falgueyret JP, Léger S, Li CS, Massé F, McKay DJ, Palmer JT, Percival MD, Robichaud J, Tsou N, Zamboni R. Trifluoroethylamines as amide isosteres in inhibitors of cathepsin K. Bioorg Med Chem Lett 2005; 15:4741-4. [PMID: 16154747 DOI: 10.1016/j.bmcl.2005.07.071] [Citation(s) in RCA: 111] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2005] [Revised: 07/15/2005] [Accepted: 07/25/2005] [Indexed: 11/17/2022]
Abstract
The P2-P3 amide of dipeptide cathepsin K inhibitors can be replaced by the metabolically stable trifluoroethylamine group. The non-basic nature of the nitrogen allows the important hydrogen bond to Gly66 to be made. The resulting compounds are 10- to 20-fold more potent than the corresponding amide derivatives. Compound 8 is a 5 pM inhibitor of human cathepsin K with >10,000-fold selectivity over other cathepsins.
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Affiliation(s)
- W Cameron Black
- Merck Frosst Centre for Therapeutic Research, P.O. Box 1005, Pointe-Claire-Dorval, Que., Canada H9R 4P8.
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45
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Fries S, Pytkowicz J, Brigaud T. Highly diastereoselective addition of organometallic reagents to a trifluoroacetaldehyde hydrazone derived from (R)-N-benzylphenylglycinol. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.05.040] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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46
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Bueno A, Moreno RM, Moyano A. 1-Amino-1-ferrocenyl-2-methyl-2-propanol: a case study on the conformational control of asymmetric induction. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.tetasy.2005.03.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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47
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Bégué JP, Bonnet-Delpon D, Crousse B, Legros J. The chemistry of trifluoromethyl imines and related acetals derived from fluoral. Chem Soc Rev 2005; 34:562-72. [PMID: 15965538 DOI: 10.1039/b401707m] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Trifluoromethylated nitrogen-containing molecules have been shown to have important biological effects and their synthesis is in the focus of the pharmaceutical industry. In the last few years, simple nitrogen derivatives of fluoral, i.e. imines, acetals and oxazolidines, have emerged as powerful building blocks to synthesize these target molecules and relevant precursors. This review summarizes the chemistry of these "N-derivatives of fluoral", with special highlight on the syntheses of peptidomimetic units (amino alcohols, amino acids...) and heterocycles (piperidines, beta-lactams...).
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Affiliation(s)
- Jean-Pierre Bégué
- Laboratoire BioCIS-CNRS, Faculté de Pharmacie-Paris Sud, rue J. B. Clément, F-92296 Châtenay-Malabry, France
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48
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Five-membered ring systems: with O & N atoms. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/s0959-6380(05)80333-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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49
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Godet T, Bonvin Y, Vincent G, Merle D, Thozet A, Ciufolini MA. Titanium Catalysis in the Ugi Reaction of α-Amino Acids with Aromatic Aldehydes. Org Lett 2004; 6:3281-4. [PMID: 15355032 DOI: 10.1021/ol048850x] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] Ugi reaction between an (S)-alpha-amino acid, an aromatic aldehyde, and an isonitrile proceeds best under catalysis by TiCl(4) in MeOH. The sense of diastereoinduction is (S,S).
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Affiliation(s)
- Thomas Godet
- Laboratoire de Synthèse et Méthodologie Organiques, CNRS UMR 5181, and Centre Commun de Diffractométrie, Université Claude Bernard Lyon 1 and Ecole Supérieure de Chimie, Physique et Electronique de Lyon, 69622 Villeurbanne, France
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