Results 101 to 110 of about 699,324 (261)

Palladium-Catalyzed Coupling of Naphthoquinone Triflates with Stannanes. Unprecedented Nucleophilic Aromatic Substitution on a Hydroxynaphthoquinone Triflate

, 2016
Palladium-Catalyzed Coupling of Naphthoquinone Triflates with Stannanes.
Antonio M. Echavarren (1299936), Nuria Tamayo (1854373), Pedro Noheda (3039894), Óscar de Frutos (3039897), Paloma Calle (1925863)   +4 more
core   +1 more source

One‐Pot Biphasic Photocatalytic CO2‐to‐Carbonylation Cascades

Angewandte Chemie, EarlyView.
Bioinspired biphasic compartmentalization enables one‐pot cascades where photocatalytic CO2 reduction generates CO for carbonylative cross‐couplings to synthesize complex organic products, including a pharmaceutical. ABSTRACT Photosynthesis compartmentalizes reactions across the thylakoid membrane in vivo to upcycle CO2 into complex chemicals that are ...
Sampurna Mitra, David M. Vahey, Shannon A. Bonke, Erwin Reisner   +3 more
wiley   +2 more sources

Nucleophilic Aromatic Substitution Reactions in Water Enabled by Micellar Catalysis

, 2015
Given the huge dependence on dipolar, aprotic solvents such as DMF, DMSO, DMAc, and NMP in nucleophilic aromatic substitution reactions (SNAr), a simple and environmentally friendly alternative is reported. Use of a “benign-by-design” nonionic surfactant,
Fabrice Gallou (1520266), Sean M. Kelly (1520272), Bruce H. Lipshutz (1330881), Nicholas A. Isley (1520275), Roscoe T. H. Linstadt (1520269)   +4 more
core   +1 more source

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

Aromatic Cation Activation: Nucleophilic Substitution of Alcohols and Carboxylic Acids

, 2014
A new method for the nucleophilic substitution of alcohols and carboxylic acids using aromatic tropyliumcation activation has been developed. This article reports the use of chloro tropylium chloride for the rapid generation of alkyl halides and acyl ...
Nguyen, Thanh Vinh, Thanh V. Nguyen, Alp Bekensir, Bekensir, Alp   +3 more
core   +2 more sources

Molecular Recognition by Halogen Bonding With Atomic Precision in a Covalent Organic Cage

Angewandte Chemie, EarlyView.
A covalent organic cage embedding a single inward‐facing halogen‐bond (XB) donor enables recognition of DMMP, a Sarin surrogate, with atomic precision through halogen bonding, while both the hydrogen bonding donor encaged analogue and the XB donor open model ‐lacking cavity‐ show no affinity.
Pierre‐Antoine Dupin, Jian Yang, Elise Antonetti, Bastien Chatelet, Xavier Bugaut, Jean‐Pierre Dutasta, Paola Nava, Anne‐Doriane Manick, David Bardelang, Alexandre Martinez   +9 more
wiley   +2 more sources

Exploring the Orthogonal Chemoselectivity of 2,4,6-Trichloro-1,3,5-Triazine (TCT) as a Trifunctional Linker With Different Nucleophiles: Rules of the Game

Frontiers in Chemistry, 2018
The study involves exploring the three orthogonal sites for aromatic nucleophilic substitution in cyanuric chloride (TCT). The preferential order of incorporation of different nucleophiles (such as alcohol, thiol, and amine) was addressed both ...
Anamika Sharma, Anamika Sharma, Ayman El-Faham, Ayman El-Faham, Beatriz G. de la Torre, Fernando Albericio, Fernando Albericio, Fernando Albericio, Fernando Albericio   +8 more
doaj   +1 more source

Molecular Engineering of a Mixed‐Spacer System Toward High‐Performance Polycarbazole Anion‐Exchange Membranes

Angewandte Chemie, EarlyView.
Mixed‐spacer polycarbazole membranes balance conductivity, swelling, and stability by tuning hydration and ionic connectivity. The optimized membrane reaches 184 mS cm−1 hydroxide conductivity and 2.51 W cm−2 peak power density, offering a promising strategy for high‐performance ether‐free AEMs.
Hao Liu, Yingdan Cui, Chanikya D. Jayawardana, Mohammed Al Murisi, Hai Zhao, Md Waliullah Hossain, Zhitao Hu, Cem Arkun, Iftikhar Ahmad, Qi Wang, Sophya Garashchuk, William Mustain, Chuanbing Tang   +12 more
wiley   +2 more sources

Synthesis of organosoluble and light-colored cardo polyimides via aromatic nucleophilic substitution polymerization

, 2015
A series of cardo polyimides (PIs) containing large-volume cardo groups were prepared via aromatic nucleophilic substitution polymerization of bisphenols and bis(fluorophthalimide)s.
Mushtaq, Nafeesa, Chen, Guofei, Liu, Jiangtao, Fang, Xingzhong   +3 more
core  

Chemical Switching Between B2N and B2C Homoaromaticity

Angewandte Chemie, EarlyView.
We report the synthesis of homoaromatic 1‐aza‐2,4‐diazadiboretane with a bicyclic four‐membered NB2C motif and demonstrate experimentally and theoretically that the homoaromatic delocalization can also be chemically shifted from the B2N to the B2C moiety by deprotonation of the ring carbon atom.
Tim Wiesmeier, Philipp Grewelinger, Carsten Präsang, Bernd Morgenstern, Diego M. Andrada, David Scheschkewitz   +5 more
wiley   +2 more sources