Results 81 to 90 of about 112,449 (386)

The Overlooked Dual Phosphorescence of Lappert's Diamino Stannylene Sn[N(SiMe3)2]2

Angewandte Chemie, EarlyView.
The diamino stannylene Sn[N(SiMe3)2]2 shows rich photophysics and photochemistry: unprecedented dual green/orange phosphorescence with long excited state lifetimes, excimer formation, and unimolecular bond homolysis. Photolytic Sn─N bond homolysis occurs only in the long‐lived excited monomer but not in the excimer.
Philipp Sikora, Robert Naumann, Lukas Sorge, Christoph Förster, Katja Heinze   +4 more
wiley   +2 more sources

Synthesis, Characterization and Reactions of (Azidoethynyl)trimethylsilane

Molecules, 2015
Synthesis of azido(trimethylsilyl)acetylene (6) was performed by treating the iodonium salt 5 with highly soluble hexadecyltributylphosphonium azide (QN3) at −40 °C.
Klaus Banert, Manfred Hagedorn, Zhuang Wu, Xiaoqing Zeng   +3 more
doaj   +1 more source

4,5,12,13-Tetrabromo[2.2]paracyclophane - A New Bis(aryne) Equivalent [PDF]

, 1993
The reaction of 2 with nBuLi at -78°C generates aryne intermediates within the aromatic rings of [2.2]paracyclophane which are trapped in Diels-Alder reactions with dienes like furan, 1,9-diphenylisobenzofuran, or cyclopentadiene. Reductive deoxygenation
Knieriem, Burkhard, König, Burkhard, Meijere, Armin de, Rauch, K.   +3 more
core   +1 more source

Palladium‐Catalyzed Gem‐Diborylalkylation of Silyl Enol Ethers and N‐Vinylacetamide via Diboryl Carbon‐Centered Radicals

Advanced Science, EarlyView.
Unlocking new reactivity: a palladium‐catalyzed coupling of gem‐iododiborylalkanes with electron‐rich olefins enables streamlined access to β,β‐diboryl carbonyl compounds under mild conditions. Mechanistic insights reveal a Pd(0)/Pd(I) cycle and a diboryl‐stabilized radical intermediate, offering a distinct platform for advancing unconventional ...
Xiao‐Yu Xie, Yi Wei, Xin‐Yi Chen, Ming Li, Kai Hong   +4 more
wiley   +1 more source

Radical Borylation of Alkyl Bromides by Photoinduced Halogen‐Atom Transfer

Angewandte Chemie, EarlyView.
The photoinduced borylation of alkyl bromides via halogen atom transfer is reported. The utility of this strategy is demonstrated with broad functional group tolerance in the borylation of various primary, secondary, and tertiary alkyl bromides. Computational studies provide mechanistic insights into the radical‐chain pathway.
Cullen R. Schull, Matthew J. McGill, Ángel Renteria‐Gómez, Poulami Mukherjee, Samuel B. Tyndall, Aaron H. Shoemaker, Michael R. Wasielewski, Osvaldo Gutierrez, Karl A. Scheidt   +8 more
wiley   +2 more sources

Enantioselective Alkoxycarbonyl‐Lactonization of Alkenes via the Merger of Photoredox and Copper Catalysis

Advanced Science, EarlyView.
A highly enantioselective alkoxycarbonyl‐lactonization of alkenes is reported through a photoredox/copper dual‐catalyzed alkoxycarbonyl radical addition/cyclization reaction. Abstract The synthesis of ester derivatives represents one of the most significant and fundamental tasks in modern organic chemistry, and numerous methods have been developed in ...
Yuping Xiong, Zhipeng Zong, Wenlin Xie, Jian‐Qiang Chen, Xiaoyu Zhou, Jie Wu   +5 more
wiley   +1 more source

Surface Protected Organozirconium Catalyzes C─H Alumination of Saturated Hydrocarbons

Angewandte Chemie, EarlyView.
C─H alumination of saturated aliphatic hydrocarbons is catalyzed by surface‐grafted organozirconium species, with high selectivity for the least‐hindered, terminal position, enabled by selective silylation of a small number of residual silanols in the catalyst. Exclusive mono‐alumination of methane is accomplished with more than 70 turnovers.
Sayak Banerjee, Jessica Rodriguez, Marco Mais, Frédéric A. Perras, Aaron D. Sadow   +4 more
wiley   +2 more sources

Phenazines Synthesis by Palladium‐Catalyzed Reductive Cyclization of 2‐Nitro‐N‐Phenylanilines Using Gaseous CO or Its Surrogates

Asian Journal of Organic Chemistry, EarlyView.
A practical palladium (Pd)‐catalyzed approach enables the synthesis of phenazines by reductive cyclization of 2‐nitro‐N‐phenylanilines using either carbon monoxide (CO) gas or phenyl formate as an in situ CO source. The method avoids harsh reagents and minimizes byproducts.
Simone Galiè, Manar Ahmed Fouad, Cecilia Abbo, Francesco Ferretti, Fabio Ragaini   +4 more
wiley   +1 more source

Iron‐Catalyzed Carbonylation Reactions with Carbon Monoxide

Angewandte Chemie, EarlyView.
Recent developments in iron‐catalyzed carbonylative transformations using CO as a C₁ feedstock are summarized in this minireview. Reaction mechanisms of selected reactions and the potential for further advancements in this field are also discussed. Abstract The utilization of carbon monoxide (CO) as an inexpensive and indispensable C1 feedstock for the
Kangkang Sun, Guo‐Ping Lu, Wei Han, Matthias Beller   +3 more
wiley   +2 more sources

A STUDY OF THE SILYLATION REACTION OF CYANOEPOXIDES WITH TRIMETHYLCHLOROSILANE IN THE PRESENCE OF MAGNESIUM [PDF]

Journal of Sciences, Islamic Republic of Iran, 1990
In the presence of magnesium and hexamethylphosphorictriamide, HMPT, trimethylchlorosilane, TMS-C1, reacts with cyanoepoxides to give related compounds. Ring cleavage at ?
doaj