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Sun R, Song W, Ma C, Zhang H, Yu X. Titanium(IV) Chloride-Mediated Stereoselective α-Alkylidenation to Efficiently Assemble Multisubstituted 1,3-Dienes. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201601025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Rengwei Sun
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy; East China University of Science & Technology; Shanghai 200237 People's Republic of China, Fax: (+86)-21-6425-1033; phone: (+86)-21-6425-2604
| | - Wei Song
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy; East China University of Science & Technology; Shanghai 200237 People's Republic of China, Fax: (+86)-21-6425-1033; phone: (+86)-21-6425-2604
| | - Chunmei Ma
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy; East China University of Science & Technology; Shanghai 200237 People's Republic of China, Fax: (+86)-21-6425-1033; phone: (+86)-21-6425-2604
| | - Huiwen Zhang
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy; East China University of Science & Technology; Shanghai 200237 People's Republic of China, Fax: (+86)-21-6425-1033; phone: (+86)-21-6425-2604
| | - Xinhong Yu
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy; East China University of Science & Technology; Shanghai 200237 People's Republic of China, Fax: (+86)-21-6425-1033; phone: (+86)-21-6425-2604
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2
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Zambrana J, Romea P, Urpí F. Studies towards the synthesis of tedanolide C. Construction of the C13-epi C1–C15 fragment. Org Biomol Chem 2016; 14:5219-23. [PMID: 27215808 DOI: 10.1039/c6ob00896h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An advanced intermediate on route towards tedanolide C has been synthesized using highly stereoselective substrate-controlled titanium-mediated aldol reactions.
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Affiliation(s)
- Joana Zambrana
- Secció de Química Orgànica
- Departament de Química Inorgànica i Orgànica
- and Institut de Biomedicina de la Universitat de Barcelona (IBUB)
- Universitat de Barcelona
- 08028 Barcelona
| | - Pedro Romea
- Secció de Química Orgànica
- Departament de Química Inorgànica i Orgànica
- and Institut de Biomedicina de la Universitat de Barcelona (IBUB)
- Universitat de Barcelona
- 08028 Barcelona
| | - Fèlix Urpí
- Secció de Química Orgànica
- Departament de Química Inorgànica i Orgànica
- and Institut de Biomedicina de la Universitat de Barcelona (IBUB)
- Universitat de Barcelona
- 08028 Barcelona
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3
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4
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Fàbregas M, Gómez-Palomino A, Pellicena M, Reina DF, Romea P, Urpí F, Font-Bardia M. Substrate-controlled Michael additions of chiral ketones to enones. Org Lett 2014; 16:6220-3. [PMID: 25423031 DOI: 10.1021/ol503133j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Substrate-controlled Michael additions of the titanium(IV) enolate of lactate-derived ketone 1 to acyclic α,β-unsaturated ketones in the presence of a Lewis acid (TiCl4 or SnCl4) provide the corresponding 2,4-anti-4,5-anti dicarbonyl compounds in good yields and excellent diastereomeric ratios. Likely, the nucleophilic species involved in such additions are bimetallic enolates that may add to enones through cyclic transition states. Finally, further studies indicate that a structurally related β-benzyloxy chiral ketone can also participate in such stereocontrolled conjugate additions.
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Affiliation(s)
- Mireia Fàbregas
- †Departament de Química Orgànica and Institut de Biomedicina de la Universitat de Barcelona (IBUB), Universitat de Barcelona, Carrer Martí i Franqués 1-11, 08028 Barcelona, Catalonia, Spain
| | - Alejandro Gómez-Palomino
- †Departament de Química Orgànica and Institut de Biomedicina de la Universitat de Barcelona (IBUB), Universitat de Barcelona, Carrer Martí i Franqués 1-11, 08028 Barcelona, Catalonia, Spain
| | - Miquel Pellicena
- †Departament de Química Orgànica and Institut de Biomedicina de la Universitat de Barcelona (IBUB), Universitat de Barcelona, Carrer Martí i Franqués 1-11, 08028 Barcelona, Catalonia, Spain
| | - Daniel F Reina
- †Departament de Química Orgànica and Institut de Biomedicina de la Universitat de Barcelona (IBUB), Universitat de Barcelona, Carrer Martí i Franqués 1-11, 08028 Barcelona, Catalonia, Spain
| | - Pedro Romea
- †Departament de Química Orgànica and Institut de Biomedicina de la Universitat de Barcelona (IBUB), Universitat de Barcelona, Carrer Martí i Franqués 1-11, 08028 Barcelona, Catalonia, Spain
| | - Fèlix Urpí
- †Departament de Química Orgànica and Institut de Biomedicina de la Universitat de Barcelona (IBUB), Universitat de Barcelona, Carrer Martí i Franqués 1-11, 08028 Barcelona, Catalonia, Spain
| | - Mercè Font-Bardia
- ‡Unitat de Difracció de RX. CCiTUB, Universitat de Barcelona, Carrer Solé i Sabarís 1-3, 08028 Barcelona, Catalonia, Spain
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5
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Ward DE, Kundu D, Biniaz M, Jana S. A Systematic Study of the Effects of Relative Configuration, Protecting Group, and Enolate Type on the Diastereoselectivities of Aldol Reactions of a Chiral Ethyl Ketone with 2-Methylpropanal. J Org Chem 2014; 79:6868-94. [DOI: 10.1021/jo500927x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dale E. Ward
- Department of Chemistry, University of Saskatchewan, 110
Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Diptarghya Kundu
- Department of Chemistry, University of Saskatchewan, 110
Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Mojtaba Biniaz
- Department of Chemistry, University of Saskatchewan, 110
Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Sushital Jana
- Department of Chemistry, University of Saskatchewan, 110
Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
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Gómez-Palomino A, Pellicena M, Romo JM, Solà R, Romea P, Urpí F, Font-Bardia M. Stereoselective Aminoxylation of Biradical Titanium Enolates with TEMPO. Chemistry 2014; 20:10153-9. [DOI: 10.1002/chem.201402127] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Indexed: 10/25/2022]
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7
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Roiban GD, Ilie A, Reetz MT. The Chelation-controlled Mukaiyama Aldol Reaction of Chiral α- and β-Alkoxy Aldehydes. CHEM LETT 2014. [DOI: 10.1246/cl.130920] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Gheorghe-Doru Roiban
- Department of Chemistry, Philipps-Universität Marburg
- Max-Planck-Institut für Kohlenforschung
| | - Adriana Ilie
- Department of Chemistry, Philipps-Universität Marburg
- Max-Planck-Institut für Kohlenforschung
| | - Manfred T. Reetz
- Department of Chemistry, Philipps-Universität Marburg
- Max-Planck-Institut für Kohlenforschung
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8
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Alcoberro S, Gómez-Palomino A, Solà R, Romea P, Urpí F, Font-Bardia M. Stereoselective Titanium-Mediated Aldol Reactions of a Chiral Lactate-Derived Ethyl Ketone with Ketones. Org Lett 2013; 16:584-7. [DOI: 10.1021/ol403461b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sandra Alcoberro
- Departament de Química Orgànica and ‡Departament de Cristal·lografia,
Mineralogia i Dipòsits Minerals, Universitat de Barcelona, 08028 Barcelona, Catalonia, Spain
| | - Alejandro Gómez-Palomino
- Departament de Química Orgànica and ‡Departament de Cristal·lografia,
Mineralogia i Dipòsits Minerals, Universitat de Barcelona, 08028 Barcelona, Catalonia, Spain
| | - Ricard Solà
- Departament de Química Orgànica and ‡Departament de Cristal·lografia,
Mineralogia i Dipòsits Minerals, Universitat de Barcelona, 08028 Barcelona, Catalonia, Spain
| | - Pedro Romea
- Departament de Química Orgànica and ‡Departament de Cristal·lografia,
Mineralogia i Dipòsits Minerals, Universitat de Barcelona, 08028 Barcelona, Catalonia, Spain
| | - Fèlix Urpí
- Departament de Química Orgànica and ‡Departament de Cristal·lografia,
Mineralogia i Dipòsits Minerals, Universitat de Barcelona, 08028 Barcelona, Catalonia, Spain
| | - Mercè Font-Bardia
- Departament de Química Orgànica and ‡Departament de Cristal·lografia,
Mineralogia i Dipòsits Minerals, Universitat de Barcelona, 08028 Barcelona, Catalonia, Spain
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