Search Results - "Rovis, Tomislav"

Electronic and Steric Tuning of a Prototypical Piano Stool Complex: Rh(III) Catalysis for C–H Functionalization by Piou, Tiffany, Rovis, Tomislav

“…Conspectus The history of transition metal catalysis is heavily steeped in ligand design, clearly demonstrating the importance of this approach. The intimate…”
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Ir-Catalyzed Intermolecular Branch-Selective Allylic C–H Amidation of Unactivated Terminal Olefins by Lei, Honghui, Rovis, Tomislav

“…An efficient method for intermolecular branch-selective allylic C–H amidation has been accomplished via Ir­(III) catalysis. The reaction proceeds through…”
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A site-selective amination catalyst discriminates between nearly identical C–H bonds of unsymmetrical disubstituted alkenes by Lei, Honghui, Rovis, Tomislav

“…C–H activation reactions enable chemists to unveil new retrosynthetic disconnections and streamline conventional synthetic approaches. A long-standing…”
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Development of Chiral Bicyclic Triazolium Salt Organic Catalysts: The Importance of the N-Aryl Substituent by Rovis, Tomislav

“…The development of a family of chiral bicyclic triazolium salts is described. Treatment of these salts with base provides a nucleophilic carbene which may be…”
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Photons or Electrons? A Critical Comparison of Electrochemistry and Photoredox Catalysis for Organic Synthesis by Tay, Nicholas E. S, Lehnherr, Dan, Rovis, Tomislav

“…Redox processes are at the heart of synthetic methods that rely on either electrochemistry or photoredox catalysis, but how do electrochemistry and photoredox…”
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Photocatalyzed Triplet Sensitization of Oximes Using Visible Light Provides a Route to Nonclassical Beckmann Rearrangement Products by Zhang, Xiao, Rovis, Tomislav

“…Oximes are valuable synthetic intermediates for the preparation of a variety of functional groups. To date, the stereoselective synthesis of oximes remains a…”
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Generation of Phosphoranyl Radicals via Photoredox Catalysis Enables Voltage–Independent Activation of Strong C–O Bonds by Stache, Erin E, Ertel, Alyssa B, Rovis, Tomislav, Doyle, Abigail G

“…Despite the prevalence of alcohols and carboxylic acids as functional groups in organic molecules and the potential to serve as radical precursors, C–O bonds…”
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A Mild Hydroaminoalkylation of Conjugated Dienes Using a Unified Cobalt and Photoredox Catalytic System by Thullen, Scott M, Rovis, Tomislav

“…Metallo-photoredox catalysis has redefined the available bond disconnections in the synthetic arsenal. By harnessing the one-electron chemistry of photoredox…”
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Rh(III)-Catalyzed Cyclopropanation Initiated by C–H Activation: Ligand Development Enables a Diastereoselective [2 + 1] Annulation of N‑Enoxyphthalimides and Alkenes by Piou, Tiffany, Rovis, Tomislav

“…N-Enoxyphthalimides undergo a Rh­(III)-catalyzed C–H activation initiated cyclopropanation of electron deficient alkenes. The reaction is proposed to proceed…”
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Diastereoselective Three-Component 3,4-Amino Oxygenation of 1,3-Dienes Catalyzed by a Cationic Heptamethylindenyl Rhodium(III) Complex by Burg, Finn, Rovis, Tomislav

“…The direct oxyamination of olefins is a compelling tool to rapidly access β-amino alcohols–a privileged motif ubiquitous in natural products, pharmaceuticals…”
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Rh(III)-Catalyzed Three-Component Syn-Carboamination of Alkenes Using Arylboronic Acids and Dioxazolones by Lee, Sumin, Rovis, Tomislav

“…Herein, we report a Rh­(III)-catalyzed three-component carboamination of alkenes from readily available aryl boronic acids as a carbon source and dioxazolones…”
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Complementary Strategies for Directed C(sp3)−H Functionalization: A Comparison of Transition‐Metal‐Catalyzed Activation, Hydrogen Atom Transfer, and Carbene/Nitrene Transfer by Chu, John C. K., Rovis, Tomislav

“…The functionalization of C(sp3)−H bonds streamlines chemical synthesis by allowing the use of simple molecules and providing novel synthetic disconnections…”
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Organocatalytic Reactions Enabled by N‑Heterocyclic Carbenes by Flanigan, Darrin M, Romanov-Michailidis, Fedor, White, Nicholas A, Rovis, Tomislav

“…Organocatalytic reactions enabled by N-heterocyclic carbenes (NHC) are detailed. A number of chiral zolium precatalysts are listed in order to demonstrate the…”
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Photoredox-Catalyzed Deaminative Alkylation via C–N Bond Activation of Primary Amines by Ashley, Melissa A, Rovis, Tomislav

“…Primary amines are often cheap, naturally occurring, and chemically diverse starting materials. For these reasons, deaminative functionalization of amines has…”
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Rhodium-Catalyzed Oxidative Cycloaddition of Benzamides and Alkynes via C−H/N−H Activation by Hyster, Todd K, Rovis, Tomislav

“…The oxidative cycloaddition of benzamides and alkynes has been developed. The reaction utilizes Rh(III) catalysts in the presence of Cu(II) oxidants, and is…”
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Rhodium(III)-Catalyzed Allylic C(sp3)-H Activation of Alkenyl Sulfonamides: Unexpected Formation of Azabicycles by Archambeau, Alexis, Rovis, Tomislav

“…Unsaturated N‐sulfonamides undergo a RhIII‐ catalyzed allylic C(sp3)H activation followed by insertion with an exogenous internal alkyne. The reaction…”
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Oxidatively Initiated NHC-Catalyzed Enantioselective Synthesis of 3,4-Disubstituted Cyclopentanones from Enals by White, Nicholas A, Rovis, Tomislav

“…An unprecedented N-heterocyclic carbene (NHC)-catalyzed annulation of enals to form 3,4-disubstituted cyclopentanones has been discovered. Aryl enals undergo…”
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Photoredox catalysis using infrared light via triplet fusion upconversion by Ravetz, Benjamin D., Pun, Andrew B., Churchill, Emily M., Congreve, Daniel N., Rovis, Tomislav, Campos, Luis M.

“…Recent advances in photoredox catalysis have made it possible to achieve various challenging synthetic transformations, polymerizations and surface…”
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Visible Light-Gated Cobalt Catalysis for a Spatially and Temporally Resolved [2+2+2] Cycloaddition by Ruhl, Kyle E, Rovis, Tomislav

“…The ability to exert spatial and temporal control over a transition-metal catalyst offers diverse opportunities for the fabrication of functional materials…”
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A Rh(III)-Catalyzed Formal [4+1] Approach to Pyrrolidines from Unactivated Terminal Alkenes and Nitrene Sources by Lee, Sumin, Lei, Honghui, Rovis, Tomislav

“…We have developed a formal [4+1] approach to pyrrolidines from readily available unactivated terminal alkenes as 4-carbon partners. The reaction provides a…”
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