Results 271 to 280 of about 1,194,003 (337)

A Precisely Bromo‐Functionalized [9]Cycloparaphenylene as a Platform for Late‐Stage Multisite π‐Extension Toward Chiral Nanohoops

Angewandte Chemie, EarlyView.
Precisely synthesized hexabrominated [9]cycloparaphenylene (CPP), accessed by a gold‐mediated method, enables efficient multisite post‐functionalization through cross‐coupling reactions. Late‐stage π‐extension on the CPP framework successfully affords armchair‐type chiral nanohoops exhibiting strong circularly polarized luminescence (|glum| = 0.100 ...
Naoya Kinoshita, Nanami Kotani, Masaya Sugiura, Kotaro Matsumura, Daisuke Sakamaki, Daiki Tauchi, Masashi Hasegawa, Hidetoshi Kawai, Yoshitaka Tsuchido   +8 more
wiley   +1 more source

Predictive, Data‐Driven Design of Red‐Light Photoredox Catalysts for C─Heteroatom Bond Formation

Angewandte Chemie, EarlyView.
From redox numbers to red light: Donor oxidation and core reduction potentials predict E0‐0 in cyanoarene dyes, guiding selection of an efficient red‐light catalyst, 4MeODPATPN (PC13). Under 620 nm light, PC13 facilitates Ni‐catalyzed C─heteroatom cross‐couplings (C─N, C─O, C─S) with high functional‐group tolerance and reduced hydrodehalogenation ...
Amir Gizatullin, Tingting Yuan, Sascha Grotjahn, Luigi Cavallo, Burkhard König, Chen Zhu, Magnus Rueping   +6 more
wiley   +1 more source

Synergistic Effects of Electricity and Light for Efficient Iron‐Catalyzed Recycling of Polystyrene Waste

Angewandte Chemie International Edition, EarlyView.
The synergistic interplay of electricity, light and earth‐abundant, nontoxic iron catalysis allowed for the efficient recycling of post‐consumer polymers into value‐added products. This robust depolymerization strategy was viable on multigram‐scale, where the cathodic hydrogen evolution reaction presents an attractive opportunity for a green hydrogen ...
Maxime Hourtoule, Piotr Skumial, Sven Trienes, Hasret Can Gülen, Jian Zhang, Lutz Ackermann   +5 more
wiley   +1 more source

Charge density analysis and topological properties of weak intermolecular interactions ? halogen and chalcogen bonding - and their comparison with hydrogen bonding

, 2013
Mariya Brezgunova
openalex   +1 more source

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Visible-Light-Driven Halogen-Bond-Assisted Direct Synthesis of Heteroaryl Thioethers Using Transition-Metal-Free One-Pot C-I Bond Formation/C-S Cross-Coupling Reaction.

Journal of Organic Chemistry, 2021
An efficient protocol for the synthesis of thioether directly from heteroarenes has been developed in the presence of visible light in a one-pot manner at room temperature. This method involves two sequential reactions in a single pot where the formation
Anuradha Nandy, Imran Kazi, S. Guha, G. Sekar   +3 more
semanticscholar   +1 more source

X…X Halogen Bond-Induced Supramolecular Helices.

Angewandte Chemie, 2021
The halogen bond is the attractive interaction between the electrophilic region of a halogen atom and the nucleophilic region of another molecular entity, emerging as a favorable manner to manipulate supramolecular chirality in self-assemblies ...
Pengyao Xing, Yunying Xu, A. Hao
semanticscholar   +1 more source

Halogen bond-induced electrophilic aromatic halogenations

Organic & Biomolecular Chemistry, 2021
This review highlights the recent development of halogen bond-induced activations of N-halosuccinimides and N,N-dihalodimethylhydantoins in electrophilic aromatic halogenations.
Wanutcha Lorpaiboon, Pakorn Bovonsombat
openaire   +2 more sources

Halogen Bond Catalyzed Bromocarbocyclization.

Angewandte Chemie International Edition, 2018
AbstractA halogen bond catalyzed bromo‐carbocyclization of N‐cinnamyl sulfonamides and O‐cinnamyl phenyl ethers has been developed. N‐methyl 4‐iodopyridinium triflate is used as the halogen‐bonding organocatalyst and the reaction is highly chemoselective.
Yuk‐Cheung Chan, Y. Yeung
semanticscholar   +3 more sources

Halogen bonding in solution

Chemical Society Reviews, 2012
Halogen bonding is the electron density donation based weak interaction of halogens with Lewis bases. Its applicability for molecular recognition processes long remained unappreciated and has so far mostly been studied in silico and in solid state.
Erdelyi, M.
openaire   +2 more sources

The Chalcogen Bond in Crystalline Solids: A World Parallel to Halogen Bond.

Accounts of Chemical Research, 2019
The distribution of the electron density around covalently bonded atoms is anisotropic, and this determines the presence, on atoms surface, of areas of higher and lower electron density where the electrostatic potential is frequently negative and ...
Patrick Scilabra, Giancarlo Terraneo, G. Resnati   +2 more
semanticscholar   +1 more source