Results 71 to 80 of about 308,670 (298)

Elucidating the Role of Hydrogen Bond Donor and Acceptor on Solvation in Deep Eutectic Solvents Formed by Ammonium/Phosphonium Salts and Carboxylic Acids

ACS Sustainable Chemistry and Engineering, 2020
Deep eutectic solvents (DESs) constitute a rapidly emerging class of sustainable liquids that have been widely studied and employed in chemical separations, catalysis, and electrochemistry.
M. Q. Farooq, Gabriel A. Odugbesi, N. Abbasi, Jared L. Anderson   +3 more
semanticscholar   +1 more source

Easier, Safer, and Greener: Unlocking the Power of Solid Reagents in Organic Reactions by Mechanochemistry

ChemistryEurope, EarlyView.
This review highlights the powerful synergy between mechanochemistry and solid reagents to replace hazardous substances traditionally used in organic synthesis. Such an approach offers a safer and more sustainable pathway for conducting organic reactions, with potential benefits in both reactivity and selectivity. The use of solid bases, acids, and gas
Adrien Gallego, Nicolas Pétry, Julien Pinaud, Olivia Giani, Frédéric Lamaty   +4 more
wiley   +1 more source

The Challenging P‐Alkylation of Aromatic Phosphorus Heterocycles and Follow‐Up Reactions

ChemistryEurope, EarlyView.
P‐alkylation of λ3σ2‐phosphinines is hindered by weak nucleophilicity and scarce synthetic access, previously requiring multistep routes or extreme electrophiles. A direct ambient‐condition method is reported using 3,5‐bis(trimethylsilyl)‐phosphinine/B(C6F5)3 with esters or iso(thio)cyanates to generate stable 1‐R‐phosphininium salts.
Samantha Frank, Ádám Horváth, Duy Nguyen, Moritz J. Ernst, Simon Steinhauer, Zoltán Benkő, Christian Müller   +6 more
wiley   +1 more source

Facile synthesis of α-alkoxymethyltriphenylphosphonium iodides: new application of PPh3/I2

Chemistry Central Journal, 2018
An efficient one pot method for the synthesis of α-alkoxymethylphosphonium iodides is developed by using PPh3/I2 combination at room temperature.
Humaira Yasmeen Gondal, Zain Maqsood Cheema, Javid Hussain Zaidi, Sammer Yousuf, M. Iqbal Choudhary   +4 more
doaj   +1 more source

Photo- and solvatochromic properties of nitrobenzospiropyran in ionic liquids containing the [NTf2]- anion [PDF]

, 2008
The photo-, thermo- and solvatochromic properties of 2,3-dihydro-10,30,30-trimethyl-6-nitrospiro- [1-benzopyran-2,20-1H-indole] (BSP-NO2) were studied in ILs containing the anion [NTf2]- by UV-Vis absorption spectroscopy, ab initio molecular orbital ...
Byrne, Robert, Diamond, Dermot, Forsyth, Maria, Fraser, Kevin J., Izgorodina, Ekaterina, MacFarlane, Douglas R.   +5 more
core   +1 more source

Methyl on the Bridge: 2‐Methyl Propellane as Precursor for 1,3‐Substituted 2‐Methylated Bicyclo[1.1.1]Pentanes

Chemistry – A European Journal, EarlyView.
The synthesis of 2‐methyl propellane and its conversion to various 1,2‐ and 1,2,3‐di‐ and trisubstituted bicyclopentanes is reported. Abstract Bicyclo[1.1.1]pentanes (BCPs) have emerged as isosteric replacements for mono‐ and para‐substituted benzene rings in medicinal and materials applications, involving substitution at the BCP bridgehead (1,3 ...
Sean R. Verschaeve, Mariana Gomes Manso, Tibo Van Eeckhoorn, Mark E. Light, Bruno Linclau   +4 more
wiley   +1 more source

Radical-Mediated Anti-Markovnikov Hydrophosphonation of Olefins [PDF]

, 2011
The radical-mediated addition of triphenylphosphonium tetrafluoroborate to olefins (hydrophosphonation) is reported. Both standard radical initiators and photochemical conditions are effective, up to the gram scale.
Daeffler, Christopher S., Grubbs, Robert H.   +1 more
core   +1 more source

The role of onium salts in the oxidation of hydrocarbons by O2 catalysed by cationic phase-transfer reagents [PDF]

, 2000
Experimental and theoretical evidence is presented that cationic phase-transfer catalysts promote the homolytic decomposition of hydroperoxide initiators into radicals, this being a fundamental step in the catalysis of the oxidation of hydrocarbons by O ...
Csányi, László J., Jáky, Károly, Korecz, László, Pálinkó, István, Rockenbauer, Antal   +4 more
core   +1 more source

Synthesis and Isolation of Bismuth Scorpionate Complexes: Toward Bond Activation via Bismuth‐Ligand Cooperation

Chemistry – A European Journal, EarlyView.
ABSTRACT Over the past twenty years, main group chemistry has significantly expanded its scope to include reactivities once considered the exclusive domain of transition metals. Among the emerging concepts, element‐ligand cooperation has proven to be a powerful strategy for enabling bond activation reactions but remains relatively unexplored for ...
Lennart Hensle, Viktoria H. Gessner
wiley   +1 more source

Rigid Ligand Environments at Beryllium, From Spectroscopic Probes to Small Molecule Activation

European Journal of Inorganic Chemistry, EarlyView.
Due to the high rigidity and definition of beryllium scorpionate complexes, they can be used to study metal‐pseudohalide and ‐carbon bonds in detail. Furthermore, these compounds can be used to activate small molecules and exhibit unprecedented transmetalation reactions. In beryllium scorpionate complexes, three of the four available coordination sites
Magnus R. Buchner, Chantsalmaa Berthold
wiley   +1 more source