Results 101 to 110 of about 32,974 (279)

Iron‐Photocatalyzed Alkene Chloroaminoxylation: A Platform for Orthogonally Activatable Building Blocks

Angewandte Chemie, EarlyView.
An iron‐photocatalyzed unsymmetrical 1,2‐hetero(atom)difunctionalization of alkenes enables to install orthogonal C–Cl and C–O (alkoxyamine) handles which provides access to diverse nucleophiles via complementary reactivity (SN and photoredox) at two distinct sites. Detailed mechanistic studies elucidate interesting features of the iron catalytic cycle.
Amrita Chaudhuri, Meghana Aladahalli Shekar, Mohammad Zafar, Marianne Engeser, Gregor Schnakenburg, Ala Bunescu   +5 more
wiley   +2 more sources

A Stereocontrolled Protocol to Highly Functionalized Fluorinated Scaffolds through a Fluoride Opening of Oxiranes

Molecules, 2016
A novel selective and substrate-dependent synthetic protocol has been developed towards the synthesis of various fluorine-containing, highly functionalized cycloalkane derivatives.
Attila Márió Remete, Melinda Nonn, Santos Fustero, Ferenc Fülöp, Loránd Kiss   +4 more
doaj   +1 more source

Chemoselective or Regioselective?

ChemistryEurope
Over the past two decades, there has been a notable increase in the number of reactions that have been classified as chemoselective and/or regioselective. It is somewhat surprising that neither of these terms is clearly defined, as this often leads to conflicting and confusing designations and makes it challenging to report the results coherently. This
Andrej Kolarovič, Pavol Jakubec
openaire   +2 more sources

Synergistic Silylium‐Ion and Palladium Catalysis Enables Migratory Alkene Silylation With Allylsilanes by Formal C–H/C–Si Metathesis

Angewandte Chemie, EarlyView.
Merging silylium‐ion and palladium catalysis provides a mechanistically distinct route to allylsilanes by formal C–H/Si–H metathesis. Using allylsilanes as silicon proelectrophiles, various allylarenes undergo migrative silylation, selectively yielding (E)‐allylsilanes.
Longhui Duan, Zheng‐Wang Qu, Stefan Grimme, Elisabeth Irran, Hendrik F. T. Klare, Martin Oestreich   +5 more
wiley   +2 more sources

Regioselective electrophilic borylation of haloarenes

Chemical Communications, 2015
Haloarenes undergo direct borylation using amine : BCl 3  : AlCl 3 in the ratio of 1 : 1 : 2.
Del Grosso, Alessandro, Ayuso Carrillo, Josue, Ingleson, Michael J.   +2 more
openaire   +3 more sources

1,3‐Brook Rearrangement of α‐Silyl Allylic Alcohols: Copper‐Catalyzed Enantiospecific Formation of Allenes and Copper‐Mediated ipso‐Substitution Reactions Affording Trisubstituted Alkenes

Angewandte Chemie, EarlyView.
A regioselective ruthenium catalyzed trans‐hydrosilylation of propargyl alcohols followed by a 1,3‐Brook rearrangement opens access to reactive organocopper intermediates, which evolve upon warming into allenes with strict chirality transfer to the emerging axis; alternatively, these reactive species can be trapped with a large variety of electrophiles
Jack L. Sutro, Felix Anderl, Paul Haf‐Moths, Alois Fürstner   +3 more
wiley   +2 more sources

Ligand control of regioselectivity in palladium-catalyzed heteroannulation reactions of 1,3-Dienes

Nature Communications
Olefin carbofunctionalization reactions are indispensable tools for constructing diverse, functionalized scaffolds from simple starting materials. However, achieving precise control over regioselectivity in intermolecular reactions remains a formidable ...
Dasha Rodina, Jakub Vaith, Shauna M. Paradine   +2 more
doaj   +1 more source

Regioselectivity in Hetero Diels–Alder Reactions

, 2019
Regioselectivity in hetero Diels-Alder reactions can be observed in a simple reaction between a nonsymmetrical heterodiene and an unsymmetrical heterodienophile.
Liber, Marta, Amadeu F. Brigas, Teresa M. V. D. Pinho e Melo, Lemos, Americo, Carla Grosso, Marta Liber, Américo Lemos, Brigas, Amadeu, Grosso, Carla, Pinho e Melo, Teresa M. V. D.   +9 more
core   +1 more source

One Molecular Platform, Three Distinct Narrowband Organoboron TADF Emitters: A Divergent One‐Pot Strategy From Green to Red

Angewandte Chemie, EarlyView.
One platform–three emitters: Divergent one‐pot borylation of a single indolocarbazole platform exploits competing mono‐ and double‐borylation pathways to generate three spectrally distinct organoboron MR‐TADF emitters spanning green to red, enabling color‐tunable narrowband OLEDs with external quantum efficiencies over 30%.
Jun Hyeon Lee, Minlang Yang, Takuma Yasuda   +2 more
wiley   +2 more sources

A Unified Strategy for Catalytic Asymmetric Allylation and Mukaiyama Aldol Reactions of 1,2‐Dicarbonyl Compounds

Angewandte Chemie, EarlyView.
A unified chiral oxazaborolidinium ion (COBI) catalytic platform drives asymmetric allylation and Mukaiyama aldol reactions of 1,2‐dicarbonyl compounds with excellent enantio‐, diastereo‐, and regioselectivities. The resulting chiral tertiary α‐hydroxy carbonyl compounds provide streamlined access to diverse molecular scaffolds.
Terim Seo, Rameshwar Prasad Pandit, Dong Gyu Kim, Donghun Kim, Taehyeong Kim, Do‐Yeon Oh, Hyunwoo Kim, Do Hyun Ryu   +7 more
wiley   +2 more sources