Results 71 to 80 of about 35,646 (266)

One‐Pot Ruthenium‐Catalyzed Synthesis of Benzyl/Allyl‐Halide Substituted (dihydro)naphthalenes via Radical Benzannulation

ChemistryEurope, EarlyView.
A one‐pot protocol to synthesize reactive benzyl‐ and allyl‐halide‐substituted (dihydro)naphthalenes from 2,3‐aryl‐1,3‐butadiene substrates and halogenated alkanes has been developed, using [Cp*RuCl(PPh3)2] as the catalyst. Mechanistic studies revealed an atom transfer radical addition and radical benzannulation sequence, followed by HCl elimination ...
Nicole S. van Leeuwen, David Vesseur, Thijmen Bonhoff, Jeffrey van Laar, Coert E. J. van Lare, Simon Mathew, Sonja Pullen, Joost N. H. Reek, Aalbert Zwijnenburg, Bas de Bruin   +9 more
wiley   +1 more source

Stable Tetravalent Phosphonium Enolate Zwitterions [PDF]

Journal of the American Chemical Society, 2007
Phosphine-catalyzed reactions of electron-deficient alkenes have emerged as powerful tools for the preparation of biologically and medicinally useful compounds.1,2 Common to these transformations is the generation of a putative dipolar phosphonium enolate through the addition of a tertiary phosphine to an electrophilic alkene.
Xue-Feng, Zhu, Christopher E, Henry, Ohyun, Kwon   +2 more
openaire   +2 more sources

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

Aminophosphines : a double role in the synthesis of colloidal indium phosphide quantum dots [PDF]

, 2016
Aminophosphines have recently emerged as economical, easy-to-implement precursors for making InP nanocrystals, which stand out as alternative Cd-free quantum dots for optoelectronic applications.
De Nolf, Kim, De Roo, Jonathan, Dupont, Dorian, Hens, Zeger, Sinnaeve, Davy, Tessier, Mickaël   +5 more
core   +1 more source

A Michaelis‐Arbuzov‐Type Pathway to a Protected 2ʹ‐Deoxy‐2ʹ‐Selenomethyl‐Adenosine‐3ʹ,5ʹ‐Phosphoroselenolate Guanosine Dinucleotide for Use in Modified m7G Cap Synthesis

Chemistry – A European Journal, EarlyView.
Here we report a synthesis of the dinucleotide 4 for a projected future total synthesis of the m7G cap 1. Highlights of the route include: 1) a 3ʹ‐H‐phosphonate/5ʹ‐selenocyanate Michaelis‐Arbuzov coupling to forge the 3ʹ,5ʹ‐phosphoroselenolate; 2) an Amosova reductive selenomethylation to install the 2ʹ‐SeMe; 3) a solid CPR II 5ʹ‐O‐phosphitylation; and
K. Lawrence E. Hale, Helen O. McCarthy, Mark G. McLaughlin   +2 more
wiley   +1 more source

Detailed studying of the spectrum of antimicrobial activity of several new condensed polynuclear arens

Zaporožskij Medicinskij Žurnal, 2017
Uncontrolled use of antimicrobial drugs leads to the selection and spread of resistant strains of microorganisms. Рhosphonium compounds and their derivatives have been chosen as very perspective during searching of new highly active antimicrobial and ...
A. V. Gumenna, D. V. Rotar, S. Ye. Dejneka, N. D. Yakovychuk, О. О. Blinder   +4 more
doaj   +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

Bipyridine-porphyrin conjugates : a thesis presented in partial fulfilment of the requirements for the degree of Masterate of Science in Chemistry at Massey University [PDF]

, 1998
The research carried out for this thesis comprises an investigation into the synthesis of bipyridyl-bridged porphyrin compounds and their metal complexes.
Allwood, Jacinda Louise
core  

Corrosion Inhibition on Mild Steel by Phosphonium Salts in 1M HNO3 Aqueous Medium [PDF]

, 2017
The corrosion inhibition on mild steel by phosphonium salts in 1 M HNO3 medium has been investigated by weight loss and polarization techniques. The result revealed that these derivatives are excellent inhibitors.
Ahamad, Amin, Amin, Ansari, Arslan, Ashassi-Sorkhabi, Bentiss, Bhrara, Bhrara, Blin, Bosch, Chennappan, Chevalier, Chidiebere, Chongdar, Cuevas-Arteaga, Desimone, Doner, Dwivedi, Eduok, F. Bentiss, Fu, Gerengi, Gerengi, Ghareba, Gopi, Hosseini, Jamali, Jitian, Khaled, Kowsari, Kuang, Lalitha, Lebrini, Li, Loto, Motamedi, Murlidharan, Murulana, Obi-Egbedi, Obot, Obot, Odewunmi, Oguzie, Oguzie, Padilla-Viveros, Popova, Popova, Pradeep Kumar, Qian, Quraishi, Raja Kumar, Rajendran, Ramesh, Rammelt, Rios, Sanchez-Amaya, Sangeetha, Solmaz, Suedile, Tan, Tao, Tebbji, Tsuneda, Vashisht, Viveros, Yana, Yuce, Yuce, Zhang, Zheng   +70 more
core   +1 more source

Immobilization of Phosphomolybdate Anions on the Surface of Magnetite Nanoparticles Modified with Quaternary Phosphonium Cations [PDF]

Journal of Nanostructures, 2013
A new hybrid nanomaterial was developed by immobilization of phosphomolybdate anions on the surface of modified magnetite nanoparticles with quaternary phosphonium cations. Silica coated magnetic nanoparticles supported phosphonium cations, Ph3P+-SCMNPs,
M. Masteri-Farahani, R. Kamrani
doaj   +1 more source