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Pérez-Palau M, Sanosa N, Romea P, Urpí F, López R, Gómez-Bengoa E, Font-Bardia M. Stereoselective Alkylation of Chiral Titanium(IV) Enolates with tert-Butyl Peresters. Org Lett 2021; 23:8852-8856. [PMID: 34699246 PMCID: PMC8609576 DOI: 10.1021/acs.orglett.1c03366] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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Here, we present
a new stereoselective alkylation of titanium(IV)
enolates of chiral N-acyl oxazolidinones with tert-butyl peresters from Cα-branched aliphatic carboxylic
acids, which proceeds through the decarboxylation of the peresters
and the subsequent formation of alkyl radicals to produce the alkylated
adducts with an excellent diastereoselectivity. Theoretical calculations
account for the observed reactivity and the outstanding stereocontrol.
Importantly, the resultant compounds can be easily converted into
ligands for asymmetric and catalytic transformations.
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Affiliation(s)
- Marina Pérez-Palau
- Secció de Química Orgànica, Departament de Química Inorgànica i Orgànica and Institut de Biomedicina de la Universitat de Barcelona (IBUB), Universitat de Barcelona, Carrer Martí i Franqués 1-11, 08028 Barcelona, Catalonia, Spain
| | - Nil Sanosa
- Secció de Química Orgànica, Departament de Química Inorgànica i 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
- Secció de Química Orgànica, Departament de Química Inorgànica i 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
- Secció de Química Orgànica, Departament de Química Inorgànica i Orgànica and Institut de Biomedicina de la Universitat de Barcelona (IBUB), Universitat de Barcelona, Carrer Martí i Franqués 1-11, 08028 Barcelona, Catalonia, Spain
| | - Rosa López
- Departamento de Química Orgánica I, Universidad del Pais Vasco, UPV/EHU, Apdo. 1072, 20080 San Sebastián, Spain
| | - Enrique Gómez-Bengoa
- Departamento de Química Orgánica I, Universidad del Pais Vasco, UPV/EHU, Apdo. 1072, 20080 San Sebastián, 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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Shao W, Besnard C, Guénée L, Mazet C. Ni-Catalyzed Regiodivergent and Stereoselective Hydroalkylation of Acyclic Branched Dienes with Unstabilized C(sp3) Nucleophiles. J Am Chem Soc 2020; 142:16486-16492. [DOI: 10.1021/jacs.0c08319] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Wen Shao
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, Geneva 1211, Switzerland
| | - Céline Besnard
- Laboratory of Crystallography, University of Geneva, 24 quai Ernest Ansermet, Geneva 1211, Switzerland
| | - Laure Guénée
- Laboratory of Crystallography, University of Geneva, 24 quai Ernest Ansermet, Geneva 1211, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, Geneva 1211, Switzerland
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