Search Results - "de Vries, André H. M."
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Practical Aspects of Carbon−Carbon Cross-Coupling Reactions Using Heteroarenes
Published in Organic process research & development (15-01-2010)“…The use of cross-coupling reactions for the preparation of alkylated and arylated heteroaromatic compounds has increased tremendously over the past two…”
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2
Influence of Phosphoramidites in Copper-Catalyzed Conjugate Borylation Reaction
Published in Organometallics (26-11-2012)“…Copper(I) has become the preferred metal to catalyze the β-boration of α,β-unsaturated carbonyl compounds, and now we demonstrate that easily accessible…”
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3
Catalytic Asymmetric Reduction of a 3,4-Dihydroisoquinoline for the Large-Scale Production of Almorexant: Hydrogenation or Transfer Hydrogenation?
Published in Organic process research & development (20-12-2013)“…Several methods are presented for the enantioselective synthesis of the tetrahydroisoquinoline core of almorexant (ACT-078573A), a dual orexin receptor…”
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4
Cycloruthenated Primary and Secondary Amines as Efficient Catalyst Precursors for Asymmetric Transfer Hydrogenation
Published in Organic letters (31-03-2005)“…Ruthenacycles obtained by cyclometalation of enantiopure aromatic primary or secondary amines with [(η6-benzene)RuCl2]2 or with [(η6-p-cymene)RuCl2]2 are…”
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Scalable Synthesis of β‑Lactamase Inhibitor QPX7728 by Sequential Nickel-Catalyzed Boron Insertion into a Benzofuran Substrate and Enantioselective Cyclopropanation of the Resulting Vinylboronate
Published in Organic process research & development (18-03-2022)“…We report the scalable, high-yielding, and highly selective synthesis of the β-lactamase inhibitor QPX7728 featuring two key synthetic steps: nickel-catalyzed…”
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Asymmetric Synthesis of a Key Intermediate for Tofacitinib via a Dynamic Kinetic Resolution-Reductive Amination Protocol
Published in Organic process research & development (21-12-2018)“…We report the first example of a catalytic asymmetric reductive amination under dynamic kinetic resolution (DKR) conditions for the preparation of a chiral…”
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Enantioselective Synthesis of a 2,3-Benzodiazepine Intermediate of BET Inhibitor BAY 1238097 via Catalytic Asymmetric Hydrogenation
Published in Organic process research & development (21-02-2020)“…Herein, we report the first example of the asymmetric hydrogenation of a prochiral benzodiazepine substrate as key transformation in a pilot-scale synthesis of…”
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Rapid Identification of a Scalable Catalyst for the Asymmetric Hydrogenation of a Sterically Demanding Aryl Enamide
Published in Organic process research & development (21-05-2010)“…High throughput screening was used to find a cost-effective and scalable catalyst for the asymmetric hydrogenation of a sterically demanding enamide as an…”
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Highly Enantioselective Conjugate Additions of Potassium Organotrifluoroborates to Enones by Use of Monodentate Phosphoramidite Ligands
Published in Journal of organic chemistry (12-11-2004)“…The use of phosphoramidite ligands in the rhodium-catalyzed asymmetric conjugate addition of potassium organotrifluoroborates to various enones in the absence…”
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Homeopathic Ligand-Free Palladium as a Catalyst in the Heck Reaction. A Comparison with a Palladacycle
Published in Organic letters (04-09-2003)“…Ligand-free Pd(OAc)2 can be used as a catalyst in the Heck reaction of aryl bromides as long as the amount of catalyst is kept between 0.01 and 0.1 mol %. At…”
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Screening of a Supramolecular Catalyst Library in the Search for Selective Catalysts for the Asymmetric Hydrogenation of a Difficult Enamide Substrate
Published in Angewandte Chemie International Edition (13-02-2006)“…Bindings for libraries: Large numbers of bidentate ligands have been formed from two monodentate ligands (one based on zinc(II) porphyrin and the other on a…”
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High Enantioselectivity Is Induced by a Single Monodentate Phosphoramidite Ligand in Iridium-Catalyzed Asymmetric Hydrogenation
Published in Angewandte Chemie International Edition (01-01-2007)“…The Full Monty? Stripping a catalyst down to its bare essentials gives a neutral iridium complex containing only one monodentate phosphoramidite ligand that is…”
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Exploiting Noninnocent (E,E)-Dibenzylideneacetone (dba) Effects in Palladium(0)-Mediated Cross-Coupling Reactions: Modulation of the Electronic Properties of dba Affects Catalyst Activity and Stability in Ligand and Ligand-Free Reaction Systems
Published in Chemistry : a European journal (24-11-2006)“…The reactivity of palladium(0) complexes, [Pd02(dba‐n,n′‐Z)3] (n,n′‐Z=4,4′‐F; 4,4′‐CF3; 4,4′‐H; 4,4′‐MeO) and [Pd0(dba‐n,n′‐Z)2] (n,n′‐Z=4,4′‐CF3; 4,4′‐H;…”
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14
Selective Pd-Catalyzed Oxidative Coupling of Anilides with Olefins through C−H Bond Activation at Room Temperature
Published in Journal of the American Chemical Society (27-02-2002)“…Using a high-throughput experimentation approach we found a selective and mild Pd-catalyzed oxidative coupling reaction between anilide derivatives and…”
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15
Instant Ligand Libraries. Parallel Synthesis of Monodentate Phosphoramidites and in Situ Screening in Asymmetric Hydrogenation
Published in Organic letters (27-05-2004)“…Chiral phosphoramidites have been identified as excellent ligands for various metal-catalyzed enantioselective transformations. Taking advantage of their easy…”
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A Mixed-Ligand Approach Enables the Asymmetric Hydrogenation of an α-Isopropylcinnamic Acid en Route to the Renin Inhibitor Aliskiren
Published in Organic process research & development (01-05-2007)“…An asymmetric hydrogenation process for the α-isopropyl dihydrocinnamic acid derivative 2, an intermediate for the renin inhibitor aliskiren (4), has been…”
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17
Asymmetric homogeneous hydrogenations at scale
Published in Chemical Society reviews (21-04-2012)“…Asymmetric hydrogenations are increasingly being used to introduce stereogenic centres into products used in the life sciences industries. There are a number…”
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Mono- versus Bidentate Ligands in Rhodium-Catalyzed Asymmetric Hydrogenation. A Comparative Rate Study
Published in Organic letters (20-02-2003)“…Bidentate chiral phosphines are no longer essential for achieving a fast and highly enantioselective hydrogenation of α- or β-dehydroamino acid derivatives. In…”
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19
Synthesis of Versatile Building Blocks through Asymmetric Hydrogenation of Functionalized Itaconic Acid Mono-Esters
Published in Advanced synthesis & catalysis (04-01-2008)“…The rhodium‐catalyzed asymmetric hydrogenation of several β‐substituted itaconic acid monoesters, using a library of monodentate phosphoramidite and phosphite…”
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Asymmetric Synthesis of (S)-2-Indolinecarboxylic Acid by Combining Biocatalysis and Homogeneous Catalysis
Published in ChemCatChem (07-02-2011)“…A tale of two catalysts: (S)‐2‐Indolinecarboxylic acid, an intermediate for ACE inhibitors, was until recently produced by Fischer indole synthesis and…”
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