1
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Kastrati A, Jaquier V, Garbo M, Besnard C, Mazet C. Pd-Catalyzed Regioselective Cyclopropanation of 2-Substituted 1,3-Dienes. ACS Org Inorg Au 2023; 3:291-298. [PMID: 37810406 PMCID: PMC10557126 DOI: 10.1021/acsorginorgau.3c00024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 07/06/2023] [Accepted: 07/06/2023] [Indexed: 10/10/2023]
Abstract
A Pd-catalyzed 3,4-regioselective cyclopropanation of 2-substituted 1,3-dienes by decomposition of diazo esters is reported. The vinylcyclopropanes generated are isolated in practical chemical yields with high levels of regioselectivity but low diastereoselectivity. The system operates under mild reaction conditions, is scalable, and tolerates various sensitive functional groups. A series of original postcatalytic derivatizations is presented to highlight the synthetic potential of the catalytic method.
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Affiliation(s)
- Agonist Kastrati
- Department
of Organic Chemistry, University of Geneva, 30 Quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Vincent Jaquier
- Department
of Organic Chemistry, University of Geneva, 30 Quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Michele Garbo
- Department
of Organic Chemistry, University of Geneva, 30 Quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Céline Besnard
- Laboratory
of Crystallography, University of Geneva, 24 Quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department
of Organic Chemistry, University of Geneva, 30 Quai Ernest Ansermet, 1211 Geneva, Switzerland
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2
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Liu S, Liu Y, Flaget A, Zhang C, Mazet C. Cu-Catalyzed Enantioselective Protoboration of 2,3-Disubstituted 1,3-Dienes. Org Lett 2023; 25:6897-6901. [PMID: 37695719 PMCID: PMC10521025 DOI: 10.1021/acs.orglett.3c02627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Indexed: 09/13/2023]
Abstract
A Cu-catalyzed regio- and enantioselective protoboration of 2,3-disubstituted 1,3-dienes is described. The protocol operates under mild conditions and is applicable to symmetrically and unsymmetrically substituted dienes, providing access to homoallylic boronates in consistently high yield, regioselectivity, and enantiomeric ratio. Preliminary investigations point to a complex mechanism.
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Affiliation(s)
- Sensheng Liu
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | | | - Arthur Flaget
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Cheng Zhang
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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3
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Duhamel T, Scaringi S, Leforestier B, Poblador-Bahamonde AI, Mazet C. Assisted Tandem Pd Catalysis Enables Regiodivergent Heck Arylation of Transiently Generated Substituted Enol Ethers. JACS Au 2023; 3:261-274. [PMID: 36711081 PMCID: PMC9875267 DOI: 10.1021/jacsau.2c00645] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 12/19/2022] [Accepted: 12/19/2022] [Indexed: 06/18/2023]
Abstract
Two complementary regiodivergent Pd-catalyzed assisted tandem [isomerization/Heck arylation] reactions are reported. They provide access to a broad array of acyclic trisubstituted vinyl ethers starting from readily available alkenyl ethers. In both cases, the isomerization is conducted with a [Pd-H] precatalyst supported by tris-tert-butyl phosphine ligands. When the catalyst is modified by the addition of a chelating bisphosphine ligand (dppp), an organic base (Cy2NMe), sodium acetate, and aryl triflates are used as electrophiles, the α-arylation pathway is promoted preferentially. The β-arylation pathway is favored for electron-deficient and electron-neutral aryl halides when the catalyst is simply modified by the addition of an excess of an organic base (Et3N) after completion of the isomerization reaction. Electron-rich aryl halides lead to reduced levels of regiocontrol. The moderate stereoselectivity obtained are proposed to reflect the absence of stereocontrol in the isomerization step. Computational analyses suggest that migratory insertion is selectivity-determining for both the arylations. For the β-selective arylation, an energy decomposition analysis underscored that electronic factors favor α-regioselectivity and steric effects favor β-regioselectivity. Preliminary investigations show that high levels of stereoselectivity can be achieved for the α-selective arylation by ligand control. Complementarily, reaction conditions for postcatalytic stereo-correction have also been identified for each catalytic system.
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4
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Abstract
Ni-catalyzed enantioselective hydrofunctionalizations of conjugated dienes are particularly demanding reactions to devise because they require not only addressing the inherent challenges associated with the development of an enantioselective transformation but also overcoming all other aspects of selective catalysis (chemoselectivity, regioselectivity, diastereoselectivity, etc.). However, the value-added nature of the chiral allylic and homoallylic derivatives obtained by these methods, the lack of efficient alternatives, and the use of an earth-abundant first-row transition metal have led to renewed interest over the past decade. In this Perspective, we give an overview of the developments in this field, from the original findings (often dating back to the last century) to the most recent contributions. Emphasis is placed on the nature of the hydrofunctionalization agent (C(sp), C(sp2), C(sp3), N, P, or O).
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Affiliation(s)
| | | | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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5
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Garbo M, Mazet C. Stereoselective Access to Conjugated and Cross-Conjugated Dienoates by Rh- and Ru-Catalyzed Isomerizations of Vinylcyclopropanes. Org Lett 2022; 24:752-756. [PMID: 34978828 DOI: 10.1021/acs.orglett.1c04223] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two complementary catalytic protocols for the isomerization of stereoisomeric mixtures of vinylcyclopropanes are described. A commercially available cationic rhodium complex provides access to conjugated dienoates in high yield with excellent stereocontrol. The combination of a bisphosphine ligand and a ruthenium precatalyst affords cross-conjugated dienoates via a formal 1,3-ring opening. The products are obtained with moderate to high stereoselectivity. The ability of each type of dienoate to engage in [4 + 2] cycloaddition reactions has been demonstrated.
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Affiliation(s)
- Michele Garbo
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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6
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Affiliation(s)
- Philippe-Alexandre Poisson
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Gaël Tran
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Céline Besnard
- Laboratory of Crystallography, University of Geneva, 24 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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7
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Taillemaud S, Rosset S, Mazet C. Teflon
Magnetic Stirring Capsules (TMSC) as a Practical and Reusable Delivery System for Sensitive Reagents and Catalysts. Helv Chim Acta 2021. [DOI: 10.1002/hlca.202100110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Sylvain Taillemaud
- Department of Organic Chemistry University of Geneva Quai Ernest Ansermet 30 CH-1211 Geneva Switzerland
| | - Stéphane Rosset
- Department of Organic Chemistry University of Geneva Quai Ernest Ansermet 30 CH-1211 Geneva Switzerland
| | - Clément Mazet
- Department of Organic Chemistry University of Geneva Quai Ernest Ansermet 30 CH-1211 Geneva Switzerland
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8
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Hao X, Li TR, Chen H, Gini A, Zhang X, Rosset S, Mazet C, Tiefenbacher K, Matile S. Bioinspired Ether Cyclizations within a π-Basic Capsule Compared to Autocatalysis on π-Acidic Surfaces and Pnictogen-Bonding Catalysts. Chemistry 2021; 27:12215-12223. [PMID: 34060672 PMCID: PMC8456975 DOI: 10.1002/chem.202101548] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Indexed: 12/15/2022]
Abstract
While the integration of supramolecular principles in catalysis attracts increasing attention, a direct comparative assessment of the resulting systems catalysts to work out distinct characteristics is often difficult. Herein is reported how the broad responsiveness of ether cyclizations to diverse inputs promises to fill this gap. Cyclizations in the confined, π-basic and Brønsted acidic interior of supramolecular capsules, for instance, are found to excel with speed (exceeding general Brønsted acid and hydrogen-bonding catalysts by far) and selective violations of the Baldwin rules (as extreme as the so far unique pnictogen-bonding catalysts). The complementary cyclization on π-acidic aromatic surfaces remains unique with regard to autocatalysis, which is shown to be chemo- and diastereoselective with regard to product-like co-catalysts but, so far, not enantioselective.
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Affiliation(s)
- Xiaoyu Hao
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, CH-1121, Geneva, Switzerland.,NCCR Molecular Systems Engineering BPR 1095, Mattenstrasse 24a, CH-4058, Basel, Switzerland.,College of Materials, Chemistry and Chemical Engineering, Chengdu University of Technology, 1 Dongsan Road Erxianqiao, Chengdu, 610059, P.R. China
| | - Tian-Ren Li
- NCCR Molecular Systems Engineering BPR 1095, Mattenstrasse 24a, CH-4058, Basel, Switzerland.,Department of Chemistry, University of Basel, Mattenstrasse 24a, CH-4058, Basel, Switzerland
| | - Hao Chen
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, CH-1121, Geneva, Switzerland.,NCCR Molecular Systems Engineering BPR 1095, Mattenstrasse 24a, CH-4058, Basel, Switzerland
| | - Andrea Gini
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, CH-1121, Geneva, Switzerland.,NCCR Molecular Systems Engineering BPR 1095, Mattenstrasse 24a, CH-4058, Basel, Switzerland
| | - Xiang Zhang
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, CH-1121, Geneva, Switzerland.,NCCR Molecular Systems Engineering BPR 1095, Mattenstrasse 24a, CH-4058, Basel, Switzerland.,Shaanxi Key Laboratory of Natural Products and Chemical Biology, College of Science, Northwest A&F University, Xianyang Shi, Yangling, 712100, P. R. China
| | - Stéphane Rosset
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, CH-1121, Geneva, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, CH-1121, Geneva, Switzerland
| | - Konrad Tiefenbacher
- NCCR Molecular Systems Engineering BPR 1095, Mattenstrasse 24a, CH-4058, Basel, Switzerland.,Department of Chemistry, University of Basel, Mattenstrasse 24a, CH-4058, Basel, Switzerland.,Department of Biosystems Science and Engineering, ETH Zurich, Mattenstrasse 26, CH-4058, Basel, Switzerland
| | - Stefan Matile
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, CH-1121, Geneva, Switzerland.,NCCR Molecular Systems Engineering BPR 1095, Mattenstrasse 24a, CH-4058, Basel, Switzerland
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9
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Fiorito D, Simon M, Thomas CM, Mazet C. Access to Highly Stereodefined 1,4- cis-Polydienes by a [Ni/Mg] Orthogonal Tandem Catalytic Polymerization. J Am Chem Soc 2021; 143:13401-13407. [PMID: 34379408 DOI: 10.1021/jacs.1c06553] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A [Ni/Mg]-catalyzed orthogonal tandem polymerization has been developed starting from enol phosphates. Initial investigations conducted on branched 1,3-dienes as monomers enabled identification of a Mg-initiated polymerization process leading to 1,4-cis-polydienes. When aryl enol phosphates are used as monomers, the [Ni/Mg]-catalyzed tandem polymerization affords 1,4-cis-polydienes with selectivities up to 99%. Elastomeric or crystalline materials were obtained by simple structural modifications of the monomeric unit. This tandem approach appears as a straightforward and efficient way to enforce diversity and selectivity in diene polymerization while retaining a fair degree of control, just as observed for stepwise systems that are accessible through established time- and manpower-consuming synthetic procedures.
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Affiliation(s)
- Daniele Fiorito
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Malaury Simon
- Chimie ParisTech, PSL University, CNRS, Institut de Recherche de Chimie Paris, 75005 Paris, France
| | - Christophe M Thomas
- Chimie ParisTech, PSL University, CNRS, Institut de Recherche de Chimie Paris, 75005 Paris, France
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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10
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Affiliation(s)
- Simone Scaringi
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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11
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Fiorito D, Scaringi S, Mazet C. Transition metal-catalyzed alkene isomerization as an enabling technology in tandem, sequential and domino processes. Chem Soc Rev 2021; 50:1391-1406. [DOI: 10.1039/d0cs00449a] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
One-pot reactions based on catalytic isomerization of alkenes not only offer the inherent advantages of atom-, step- and redox-economy but also enable the preparation of value-added products that would be difficult to access by conventional methods.
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Affiliation(s)
- Daniele Fiorito
- Organic Chemistry Department
- University of Geneva
- Geneva 1211
- Switzerland
| | - Simone Scaringi
- Organic Chemistry Department
- University of Geneva
- Geneva 1211
- Switzerland
| | - Clément Mazet
- Organic Chemistry Department
- University of Geneva
- Geneva 1211
- Switzerland
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12
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Desfeux C, Besnard C, Mazet C. [ n]Dendralenes as a Platform for Selective Catalysis: Ligand-Controlled Cu-Catalyzed Chemo-, Regio-, and Enantioselective Borylations. Org Lett 2020; 22:8181-8187. [PMID: 32559086 DOI: 10.1021/acs.orglett.0c01892] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the development of two complementary methods for the Cu-catalyzed anti-Markovnikov borylation of one specific olefin in 2-substituted [n]dendralenes (n = 3-6). The first protocol operates with a bisphosphine ligand and occurs with high regio- and chemoselectivity for the terminal double bond, independently of the number of cross-conjugated alkenes. We show that the use of a chiral phosphanamine ligand enables the highly chemo-, regio-, and enantioselective borylation of the alkene cross-conjugated with the terminal olefin in [n]dendralenes.
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Affiliation(s)
- Camille Desfeux
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Céline Besnard
- Laboratory of Crystallography, University of Geneva, 24 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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13
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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14
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Garbo M, Besnard C, Guénée L, Mazet C. Access to Optically Active 7-Membered Rings by a 2-Step Synthetic Sequence: Cu-Catalyzed Stereoselective Cyclopropanation of Branched 1,3-Dienes/Rh-Catalyzed Stereoconvergent [5 + 2] Cycloaddition. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02956] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Michele Garbo
- Department of Organic Chemistry, University of Geneva, 30 Quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Céline Besnard
- Laboratory of Crystallography, University of Geneva, 24 Quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Laure Guénée
- Laboratory of Crystallography, University of Geneva, 24 Quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 Quai Ernest Ansermet, 1211 Geneva, Switzerland
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15
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Liu Y, Mazet C. A Catalytic Dual Isomerization/Allylboration Sequence for the Stereoselective Construction of Congested Secondary Homoallylic Alcohols. J Org Chem 2020; 85:5638-5650. [PMID: 32212727 DOI: 10.1021/acs.joc.0c00565] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A catalytic sequence for the diastereo- and enantioselective preparation of homoallylic alcohols with an adjacent quaternary (stereo)center is reported. The one-pot process relies on the use of a single (achiral or chiral) iridium complex to catalyze the concomitant isomerization of primary allylic alcohols and homoallylboronates into (chiral) aldehydes and allylboronates, respectively. In the same flask, a chiral Brønsted acid is added next to engage the isomerization products into a stereocontrolled allylboration reaction. Structural variations have been performed on both the allylic alcohols and the homoallylboronates. This mild process affords an array of stereochemically congested and complex chiral secondary homoallylic alcohols in high yield, excellent diastereoselectivity, and usually high enantioselectivity.
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Affiliation(s)
- Yangbin Liu
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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16
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Fiorito D, Liu Y, Besnard C, Mazet C. Direct Access to Chiral Secondary Amides by Copper-Catalyzed Borylative Carboxamidation of Vinylarenes with Isocyanates. J Am Chem Soc 2019; 142:623-632. [DOI: 10.1021/jacs.9b12297] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Daniele Fiorito
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Yangbin Liu
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Céline Besnard
- Laboratory of Crystallography, University of Geneva, 24 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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17
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Affiliation(s)
- Gaël Tran
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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18
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Romano C, Fiorito D, Mazet C. Remote Functionalization of α,β-Unsaturated Carbonyls by Multimetallic Sequential Catalysis. J Am Chem Soc 2019; 141:16983-16990. [DOI: 10.1021/jacs.9b09373] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Ciro Romano
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Daniele Fiorito
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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19
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Tran G, Shao W, Mazet C. Ni-Catalyzed Enantioselective Intermolecular Hydroamination of Branched 1,3-Dienes Using Primary Aliphatic Amines. J Am Chem Soc 2019; 141:14814-14822. [DOI: 10.1021/jacs.9b07253] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Gaël Tran
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Wen Shao
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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20
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Affiliation(s)
- Daniele Fiorito
- Department of Organic Chemistry, University of Geneva, 30 Quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 Quai Ernest Ansermet, 1211 Geneva, Switzerland
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21
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Abstract
A highly enantioselective Cu-catalyzed borylation of 2-substituted 1,3-dienes is reported. The use of a chiral phosphanamine ligand is essential in achieving high chemo-, regio-, diastereo- and enantioselectivity. It provides access to a variety of homoallylic boronates in consistently high yield and enantiomeric excess with 2-aryl and 2-heteroaryl 1,3-dienes as well as sterically demanding 2-alkyl 1,3-dienes. Preliminary investigations based on a non-linear effect study point to a mechanism involving more than one metal center.
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Affiliation(s)
- Yangbin Liu
- University of Geneva , Department of Organic Chemistry , 30 quai Ernest Ansermet , 1211 Geneva-4 , Switzerland .
| | - Daniele Fiorito
- University of Geneva , Department of Organic Chemistry , 30 quai Ernest Ansermet , 1211 Geneva-4 , Switzerland .
| | - Clément Mazet
- University of Geneva , Department of Organic Chemistry , 30 quai Ernest Ansermet , 1211 Geneva-4 , Switzerland .
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22
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Romano C, Mazet C. Multicatalytic Stereoselective Synthesis of Highly Substituted Alkenes by Sequential Isomerization/Cross-Coupling Reactions. J Am Chem Soc 2018; 140:4743-4750. [DOI: 10.1021/jacs.8b02134] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Ciro Romano
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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23
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Affiliation(s)
- Daniele Fiorito
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Sarah Folliet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Yangbin Liu
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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24
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Borrajo-Calleja GM, Bizet V, Besnard C, Mazet C. Mechanistic Investigation of the Pd-Catalyzed Intermolecular Carboetherification and Carboamination of 2,3-Dihydrofuran: Similarities, Differences, and Evidence for Unusual Reaction Intermediates. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00483] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gustavo M. Borrajo-Calleja
- Department
of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Vincent Bizet
- Department
of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Céline Besnard
- Laboratory
of Crystallography, University of Geneva, 24 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department
of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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Li H, Fiorito D, Mazet C. Exploring Site Selectivity of Iridium Hydride Insertion into Allylic Alcohols: Serendipitous Discovery and Comparative Study of Organic and Organometallic Catalysts for the Vinylogous Peterson Elimination. ACS Catal 2017. [DOI: 10.1021/acscatal.6b03376] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Houhua Li
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Daniele Fiorito
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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26
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Affiliation(s)
- Vincent Bizet
- Department
of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Gustavo M. Borrajo-Calleja
- Department
of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Céline Besnard
- Laboratory
of Crystallography, University of Geneva, 24 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department
of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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27
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Humbert N, Mazet C. The diastereoselective synthesis of octahedral cationic iridium hydride complexes with a stereogenic metal centre. Chem Commun (Camb) 2016; 52:10629-31. [PMID: 27498763 DOI: 10.1039/c6cc06020j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We report herein the highly diastereoselective synthesis of octahedral cationic Ir(iii) hydride complexes with a stereogenic metal centre following various strategies. The configurational stability of these compounds has also been investigated.
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Affiliation(s)
- Nicolas Humbert
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland.
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland.
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28
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Lin L, Romano C, Mazet C. Palladium-Catalyzed Long-Range Deconjugative Isomerization of Highly Substituted α,β-Unsaturated Carbonyl Compounds. J Am Chem Soc 2016; 138:10344-50. [DOI: 10.1021/jacs.6b06390] [Citation(s) in RCA: 146] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Luqing Lin
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Ciro Romano
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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29
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Abstract
This Account presents the development of the iridium-catalyzed isomerization of primary allylic alcohols in our laboratory over the past 8 years. Our initial interest was driven by the long-standing challenge associated with the development of a general catalyst even for the nonasymmetric version of this seemingly simple chemical transformation. The added value of the aldehyde products and the possibility to rapidly generate molecular complexity from readily accessible allylic alcohols upon a redox-economical isomerization reaction were additional sources of motivation. Certainly influenced by the success story of the related isomerization of allylic amines, most catalysts developed for the selective isomerization of allylic alcohols were focused on rhodium as a transition metal of choice. Our approach has been based on the commonly accepted precept that hydrogenation and isomerization are often competing processes, with the latter being usually suppressed in favor of the former. The cationic iridium complexes [(Cy3P)(pyridine)Ir(cod)]X developed by Crabtree (X = PF6) and Pfaltz (X = BArF) are usually considered as the most versatile catalysts for the hydrogenation of allylic alcohols. Using molecular hydrogen to generate controlled amounts of the active form of these complexes but performing the reaction in the absence of molecular hydrogen enabled deviation from the typical hydrogenation manifold and favored exclusively the isomerization of allylic alcohols into aldehydes. Isotopic labeling and crossover experiments revealed the intermolecular nature of the process. Systematic variation of the ligand on the iridium center allowed us to identify the structural features beneficial for catalytic activity. Subsequently, three generations of chiral catalysts have been investigated and enabled us to reach excellent levels of enantioselectivity for a wide range of 3,3-disubstituted aryl/alkyl and alkyl/alkyl primary allylic alcohols leading to β-chiral aldehydes. The combination of the isomerization reaction with enamine catalysis in a sequential process gave access to α,β-chiral aldehydes in high diastereomeric ratio and excellent enantioselectivity. Catalyst-controlled diastereoselective isomerization of stereochemically complex steroid scaffolds has been achieved, giving access indifferently to derivatives with the natural and unnatural C20 configuration, a long-standing challenge in the field. Structural diversification at close proximity of the reactive site and within the polycyclic domain served to further demonstrate the generality and the potential of the method. Models based on quadrant diagrams enabled rationalization of the high levels of enantio- and diastereocontrol obtained in the isomerization of allylic alcohols.
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Affiliation(s)
- Houhua Li
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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30
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Abstract
A novel enantioselective Pd-catalyzed intermolecular carboetherification of dihydrofurans is reported. The in situ generation of chiral bis-phosphine mono-oxide ligands is crucial, and a general catalytic system has been identified based on this approach. It provides access to a variety of fused tetrahydrofurobenzofurans in consistently high yield and enantiomeric excess.
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Affiliation(s)
- Gustavo M Borrajo-Calleja
- Department of Organic Chemistry, University of Geneva , 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Vincent Bizet
- Department of Organic Chemistry, University of Geneva , 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva , 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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31
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Zhang B, Kaziz S, Li H, Wodka D, Malola S, Safonova O, Nachtegaal M, Mazet C, Dolamic I, Llorca J, Kalenius E, Lawson Daku LM, Hakkinen H, Bürgi T, Barrabés N. Pd2Au36(SR)24 cluster: structure studies. Nanoscale 2015; 7:17012-9. [PMID: 26415984 DOI: 10.1039/c5nr04324g] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The location of the Pd atoms in Pd2Au36(SC2H4Ph)24, is studied both experimentally and theoretically. X-ray photoelectron spectroscopy (XPS) indicates oxidized Pd atoms. Palladium K-edge extended X-ray absorption fine-structure (EXAFS) data clearly show Pd-S bonds, which is supported by far infrared spectroscopy and by comparing theoretical EXAFS spectra in R space and circular dichroism spectra of the staple, surface and core doped structures with experimental spectra.
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Affiliation(s)
- Bei Zhang
- Department of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland.
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32
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Li H, Mazet C. Catalyst-Directed Diastereoselective Isomerization of Allylic Alcohols for the Stereoselective Construction of C(20) in Steroid Side Chains: Scope and Topological Diversification. J Am Chem Soc 2015; 137:10720-7. [DOI: 10.1021/jacs.5b06281] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Houhua Li
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest
Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest
Ansermet, 1211 Geneva, Switzerland
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33
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Borrajo-Calleja GM, Bizet V, Bürgi T, Mazet C. Access to enantioenriched 2,3- and 2,5-dihydrofurans with a fully substituted C2 stereocenter by Pd-catalyzed asymmetric intermolecular Heck reaction. Chem Sci 2015; 6:4807-4811. [PMID: 29142715 PMCID: PMC5667573 DOI: 10.1039/c5sc01460c] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Accepted: 05/31/2015] [Indexed: 11/21/2022] Open
Abstract
A palladium catalyzed intermolecular asymmetric Heck reaction provides access to valuable 2,3- and 2,5-dihydrofurans with a fully substituted C2 stereocenter with high levels of regio- and enantiocontrol.
A palladium-catalyzed intermolecular asymmetric Heck reaction with dihydrofurans with a trisubstituted double bond is reported. The use of two different chiral ligands provides access to valuable 2,3- and 2,5-dihydrofurans with a fully substituted C2 stereocenter with high levels of regio- and enantiocontrol.
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Affiliation(s)
- Gustavo M Borrajo-Calleja
- Department of Organic Chemistry , University of Geneva , 30 quai Ernest Ansermet , 1211 Geneva-4 , Switzerland .
| | - Vincent Bizet
- Department of Organic Chemistry , University of Geneva , 30 quai Ernest Ansermet , 1211 Geneva-4 , Switzerland .
| | - Thomas Bürgi
- Department of Physical Chemistry , University of Geneva , 30 quai Ernest Ansermet , 1211 Geneva-4 , Switzerland
| | - Clément Mazet
- Department of Organic Chemistry , University of Geneva , 30 quai Ernest Ansermet , 1211 Geneva-4 , Switzerland .
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34
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Abstract
This Feature Article intends to provide an overview of a variety of catalytic isomerization reactions that have been performed using well-defined transition metal hydride precatalysts. A particular emphasis is placed on the underlying mechanistic features of the transformations discussed. These have been categorized depending upon the nature of the substrate and in most cases discussed following a chronological order.
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Affiliation(s)
- Evgeny Larionov
- Organic Chemistry Department, University of Geneva, 30 quai Ernest Ansermet, Geneva 1204-CH, Switzerland.
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35
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Franzoni I, Guénée L, Mazet C. A general Pd-catalyzed α- and γ-benzylation of aldehydes for the formation of quaternary centers. Org Biomol Chem 2015; 13:6338-43. [DOI: 10.1039/c5ob00702j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
A palladium-catalyzed benzylation of α-branched aldehydes has been developed using benzyl methyl carbonates.
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Affiliation(s)
- Ivan Franzoni
- University of Geneva
- Department of Organic Chemistry
- 1211 Geneva-4
- Switzerland
| | - Laure Guénée
- University of Geneva
- Laboratoire de Cristallographie
- 1211 Geneva-4
- Switzerland
| | - Clément Mazet
- University of Geneva
- Department of Organic Chemistry
- 1211 Geneva-4
- Switzerland
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36
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Larionov E, Lin L, Guénée L, Mazet C. Scope and Mechanism in Palladium-Catalyzed Isomerizations of Highly Substituted Allylic, Homoallylic, and Alkenyl Alcohols. J Am Chem Soc 2014; 136:16882-94. [DOI: 10.1021/ja508736u] [Citation(s) in RCA: 154] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Evgeny Larionov
- Department
of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Luqing Lin
- Department
of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Laure Guénée
- Laboratory
of Crystallography, University of Geneva, 24 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Clément Mazet
- Department
of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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37
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Carrion C, Chtourou D, Magdelaine A, Nicham F, Mazet C, Nicoud L. C0277: Measuring Plasma Fibrinogen Levels Below 40 Mg/Dl Using the Sta®-Liquid Fib Reagent. Thromb Res 2014. [DOI: 10.1016/s0049-3848(14)50239-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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38
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Abstract
The present article summarizes the development of two novel and complementary catalytic methods to access alpha-chiral aldehydes. A C1-symmetric chiral (P,N) ligand with a structure derived from the ubiquitous binepine scaffold has been specifically designed for the Pd-catalyzed alpha-arylation of aldehydes to access indane derivatives with a well-defined quaternary stereocenter in high yields and excellent enantioselectivities. In addition, a dinuclear palladium hydride catalyst has been synthesized for the isomerization of terminal and trisubstituted epoxides into aldehydes and ketones respectively. Combined experimental and theoretical investigations pointed to an unprecedented 'epoxide-opening/hydride-transfer' sequence. The mechanism also features two distinct enantio-determining steps in the kinetic resolution of racemic epoxides.
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Affiliation(s)
- Clément Mazet
- Department of Organic Chemistry, University of Geneva, Geneva.
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39
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Humbert N, Vyas DJ, Besnard C, Mazet C. An air-stable cationic iridium hydride as a highly active and general catalyst for the isomerization of terminal epoxides. Chem Commun (Camb) 2014; 50:10592-5. [DOI: 10.1039/c4cc05260a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We describe the use of an air-stable iridium hydride catalyst for the isomerization of terminal epoxides into aldehydes with perfect regioselectivity.
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Affiliation(s)
- Nicolas Humbert
- Department of Organic Chemistry
- University of Geneva
- 1211 Geneva-4, Switzerland
| | - Devendra J. Vyas
- Department of Organic Chemistry
- University of Geneva
- 1211 Geneva-4, Switzerland
| | - Céline Besnard
- Laboratoire de Cristallographie
- University of Geneva
- 1211 Geneva-4, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry
- University of Geneva
- 1211 Geneva-4, Switzerland
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40
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41
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Humbert N, Larionov E, Mantilli L, Nareddy P, Besnard C, Guénée L, Mazet C. Highly ModularC1-Symmetric Chiral (P,N) Ligands with a Stereolabile P Center: Experimental and Theoretical Studies. Chemistry 2013; 20:745-51. [DOI: 10.1002/chem.201303146] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Indexed: 11/11/2022]
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42
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Abstract
The iridium-catalyzed diastereo- and regioselective isomerization of primary allylic alcohols using Crabtree's catalyst or sterically modified analogs is reported. The importance of the size of the substituents on either the substrates or the catalysts has been rationalized by linear free energy relationships.
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Affiliation(s)
- Houhua Li
- University of Geneva , Department of Organic Chemistry, 30 quai Ernest Ansermet, 1211 Geneva-4, Switzerland
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43
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Vyas DJ, Larionov E, Besnard C, Guénée L, Mazet C. Isomerization of Terminal Epoxides by a [Pd–H] Catalyst: A Combined Experimental and Theoretical Mechanistic Study. J Am Chem Soc 2013; 135:6177-83. [DOI: 10.1021/ja400325w] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Devendra J. Vyas
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211
Geneva 4, Switzerland
| | - Evgeny Larionov
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211
Geneva 4, Switzerland
| | - Céline Besnard
- Laboratoire
de Crystallographie, University of Geneva, Quai Ernest Ansermet 24, 1211
Geneva 4, Switzerland
| | - Laure Guénée
- Laboratoire
de Crystallographie, University of Geneva, Quai Ernest Ansermet 24, 1211
Geneva 4, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211
Geneva 4, Switzerland
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44
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Franzoni I, Guénée L, Mazet C. Access to congested quaternary centers by Pd-catalyzed intermolecular γ-arylation of unactivated α,β-unsaturated aldehydes. Chem Sci 2013. [DOI: 10.1039/c3sc50806d] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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45
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46
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Mantilli L, Gérard D, Besnard C, Mazet C. Structure-Activity Relationship in the Iridium-Catalyzed Isomerization of Primary Allylic Alcohols. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200369] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Luca Mantilli
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211 Geneva 4, Switzerland, Fax: +41‐22‐379‐3215
| | - David Gérard
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211 Geneva 4, Switzerland, Fax: +41‐22‐379‐3215
| | - Céline Besnard
- Laboratoire de Cristallographie, University of Geneva, Quai Ernest Ansermet 24, 1211 Geneva 4, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211 Geneva 4, Switzerland, Fax: +41‐22‐379‐3215
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47
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Nareddy P, Mantilli L, Guénée L, Mazet C. Atropoisomeric (P,N) Ligands for the Highly Enantioselective Pd-Catalyzed Intramolecular Asymmetric α-Arylation of α-Branched Aldehydes. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201108061] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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48
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Nareddy P, Mantilli L, Guénée L, Mazet C. Atropoisomeric (P,N) Ligands for the Highly Enantioselective Pd-Catalyzed Intramolecular Asymmetric α-Arylation of α-Branched Aldehydes. Angew Chem Int Ed Engl 2012; 51:3826-31. [DOI: 10.1002/anie.201108061] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Revised: 01/25/2012] [Indexed: 11/11/2022]
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49
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50
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Affiliation(s)
- Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, CH-1211 Geneva, Switzerland
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