Search Results - "Curran, Dennis P."

Catalysis of Radical Reactions: A Radical Chemistry Perspective by Studer, Armido, Curran, Dennis P.

“…The area of catalysis of radical reactions has recently flourished. Various reaction conditions have been discovered and explained in terms of catalytic…”
Get full text

Organocatalysis and CH Activation Meet Radical- and Electron-Transfer Reactions by Studer, Armido, Curran, Dennis P.

“…A radical outlook: Recently published “organocatalytic CH activation reactions” have now been interpreted as base‐promoted homolytic substitutions. The…”
Get full text

1,4-Hydroboration Reactions of Electron-Poor Aromatic Rings by N‑Heterocyclic Carbene Boranes by Dai, Wen, Geib, Steven J, Curran, Dennis P

“…Reactions of N-heterocyclic carbene boranes (NHC-boranes) with electron-poor aromatic rings under photoredox conditions provide dearomatized…”
Get full text

Oxygen Switch in Visible-Light Photoredox Catalysis: Radical Additions and Cyclizations and Unexpected C–C-Bond Cleavage Reactions by Zhu, Shaoqun, Das, Arindam, Bui, Lan, Zhou, Hanjun, Curran, Dennis P, Rueping, Magnus

“…Visible light photoredox catalyzed inter- and intramolecular C–H functionalization reactions of tertiary amines have been developed. Oxygen was found to act as…”
Get full text

Facile Borylation of Alkenes, Alkynes, Imines, Arenes and Heteroarenes with N‐Heterocyclic Carbene‐Boranes and a Heterogeneous Semiconductor Photocatalyst by Xie, Fukai, Mao, Zhan, Curran, Dennis P., Liang, Hongliang, Dai, Wen

“…Although the development of radical chain and photocatalytic borylation reactions using N‐heterocyclic carbene (NHC)‐borane as boron source is remarkable, the…”
Get full text

Synthesis and Reactions of N-Heterocyclic Carbene Boranes by Curran, Dennis P., Solovyev, Andrey, Makhlouf Brahmi, Malika, Fensterbank, Louis, Malacria, Max, Lacôte, Emmanuel

“…Boranes are widely used Lewis acids and N‐heterocyclic carbenes (NHCs) are popular Lewis bases, so it is remarkable how little was known about their derived…”
Get full text

Synthetic applications of fluorous solid-phase extraction (F-SPE) by Zhang, Wei, Curran, Dennis P.

“…[Display omitted] The concept, protocols, instruments of fluorous solid-phase extraction techniques, and their applications for solution-phase parallel and…”
Get full text

Borylative Radical Cyclizations of Benzo[3,4]cyclodec‐3‐ene‐1,5‐diynes and N‐Heterocyclic Carbene‐Boranes by Watanabe, Takashi, Hirose, Daisuke, Curran, Dennis P., Taniguchi, Tsuyoshi

“…Borylative radical cyclization of benzo[3,4]cyclodec‐3‐ene‐1,5‐diynes to provide 5‐borylated 6,7,8,9‐tetrahydrobenzo[a]azulenes has been developed. The…”
Get full text

A Short Total Synthesis of (±)-Epimeloscine and (±)-Meloscine Enabled by a Cascade Radical Annulation of a Divinylcyclopropane by Zhang, Hanmo, Curran, Dennis P

“…The first stereoselective synthesis of epimeloscine has been accomplished in 13 total steps with a longest linear sequence of 10 steps. The core of the…”
Get full text

Phenyl Hydrazine as Initiator for Direct Arene C–H Arylation via Base Promoted Homolytic Aromatic Substitution by Dewanji, Abhishek, Murarka, Sandip, Curran, Dennis P, Studer, Armido

“…A simple and efficient direct radical arylation of unactivated arenes is described which uses cheap and commercially available phenyl hydrazine as an…”
Get full text

Polarity Reversal Catalysis in Radical Reductions of Halides by N-Heterocyclic Carbene Boranes by Pan, Xiangcheng, Lacôte, Emmanuel, Lalevée, Jacques, Curran, Dennis P

“…Otherwise sluggish or completely ineffective radical reductions of alkyl and aryl halides by N-heterocyclic carbene boranes (NHC-boranes) are catalyzed by…”
Get full text

Synthesis and Suzuki Reactions of N‑Heterocyclic Carbene Difluoro(aryl)-boranes by Nerkar, Swapnil, Curran, Dennis P

“…Readily available NHC-arylboranes (NHC-BH2Ar) are converted in high yield to stable NHC-difluoro­(aryl)­boranes (NHC-BF2Ar) by treatment with 2 equiv of…”
Get full text

Synthesis of Boriranes by Double Hydroboration Reactions of N‑Heterocyclic Carbene Boranes and Dimethyl Acetylenedicarboxylate by McFadden, Timothy R, Fang, Cheng, Geib, Steven J, Merling, Everett, Liu, Peng, Curran, Dennis P

“…Reaction of bis-(2,6-diisopropylphenyl)-imidazol-2-ylidene borane with dimethyl acetylenedicarboxylate gives 80% yield of a stable borirane (boracyclopropane)…”
Get full text

EPR Studies on the Addition of Ligated Boryl Radicals to Carbonyl Compounds by Walton, John C, Dai, Wen, Curran, Dennis P

“…The boron-centered radicals derived from alkenyl N-heterocyclic carbene (NHC)-boranes bearing ester substituents were recently found to ring close in 5-endo…”
Get full text

5-Endo Cyclizations of NHC-Boraallyl Radicals Bearing Ester Substituents: Characterization of Derived 1,2-Oxaborole Radicals and Boralactones by Dai, Wen, McFadden, Timothy R, Curran, Dennis P, Früchtl, Herbert A, Walton, John C

“…EPR studies of radical hydrogen abstraction reactions of N-heterocyclic carbene (NHC) complexes of alkenylboranes bearing two ester substituents revealed not…”
Get full text

Relative Reactivity of Stable Ligated Boranes and a Borohydride Salt in Rhodium(II)-Catalyzed Boron–Hydrogen Insertion Reactions by Allen, Thomas H, Curran, Dennis P

“…Relative reactivities of a series of neutral ligated boranes L-BH3 (where L is NHC, amine, pyridine, or phosphine) and the cyanoborohydride anion have been…”
Get full text

Generation and Structure of Unique Boriranyl Radicals by Walton, John C, McFadden, Timothy R, Curran, Dennis P

“…Three-member ring boracyclopropanes (boriranes) with N-heterocyclic carbene substituents were prepared by a recently discovered route. H atoms were selectively…”
Get full text

N-Heterocyclic Carbene Boryl Radicals: A New Class of Boron-Centered Radical by Ueng, Shau-Hua, Solovyev, Andrey, Yuan, Xinting, Geib, Steven J, Fensterbank, Louis, Lacôte, Emmanuel, Malacria, Max, Newcomb, Martin, Walton, John C, Curran, Dennis P

“…Reduction of xanthates by N-heterocyclic carbene boranes (NHC-boranes) has been suggested to occur by a radical chain mechanism involving heretofore unknown…”
Get full text

The Thermal Rearrangement of an NHC‐Ligated 3‐Benzoborepin to an NHC‐Boranorcaradiene by Shimoi, Masaki, Kevlishvili, Ilia, Watanabe, Takashi, Maeda, Katsuhiro, Geib, Steven J., Curran, Dennis P., Liu, Peng, Taniguchi, Tsuyoshi

“…An N‐heterocyclic‐carbene‐ligated 3‐benzoborepin with a bridged structure has been synthesized by double radical trans‐hydroboration of…”
Get full text

Difluorination at Boron Leads to the First Electrophilic Ligated Boryl Radical (NHC‐BF2.) by Subervie, Daniel, Graff, Bernadette, Nerkar, Swapnil, Curran, Dennis P., Lalevée, Jacques, Lacôte, Emmanuel

“…1,3‐Dimethylimidazol‐2‐ylidene difluoroborane (NHC‐BF2H) was prepared in a one‐pot, two‐step reaction from the parent ligated borane (NHC‐BH3). The derived…”
Get full text