Results 81 to 90 of about 10,808 (271)

Chelation-Assisted Substrate-Controlled Asymmetric Lithiation-Allylboration of Chiral Carbamate 1,2,4-Butanetriol Acetonide

Molecules, 2015
The lithiation of 2-(2,2-dimethyl-1,3-dioxolan-4-yl)ethyl diisopropylcarbamate (1) is achieved freely by sec-butyllithium in diethylether with high lk-diastereoselectivity: the bicyclic chelate complexes 3a and 3b are reacted with electrophiles to form ...
Adeem Mahmood, Hamad Z. Alkhathlan, Saima Parvez, Merajuddin Khan, Sohail A. Shahzad   +4 more
doaj   +1 more source

Preservation therapy for vertically fractured teeth with periodontal tissue regeneration using FGF‐2

Clinical Advances in Periodontics, EarlyView.
Abstract Background Vertically fractured teeth often have a poor prognosis, and extraction is considered the most predictable treatment. Conventional management has consisted of preservation therapy involving extraction, bonding, root restoration, and replantation of fractured teeth.
Masaichiro Iwasaki, Masahide Takedachi, Keigo Sawada, Koji Miki, Shinya Murakami   +4 more
wiley   +1 more source

Stoichiometric and Catalytic Synthesis of Alkynylphosphines

Molecules, 2012
Alkynylphosphines or their borane complexes are available either through C–P bond forming reactions or through modification of the phosphorus or the alkynyl function of various alkynyl phosphorus derivatives.
Annie-Claude Gaumont, Carole Alayrac, Romain Veillard, Elise Bernoud   +3 more
doaj   +1 more source

Metal-free hydrogenation catalyzed by an air-stable borane: use of solvent as a frustrated Lewis base [PDF]

, 2014
In recent years ‘frustrated Lewis pairs’ (FLPs) have been shown to be effective metal‐free catalysts for the hydrogenation of many unsaturated substrates.
Alfonsi, Arnett, Ashley, Birkmann, Blackwell, Carmody, Chakraborty, Chapman, Chase, Chase, Chen, Chivers, Erős, Erős, Greb, Greb, Greb, Herrington, Holschumacher, Horton, Horton, Hounjet, Hounjet, Krossing, Lorber, Lu, Mahdi, Massey, Moebs-Sanchez, Mömming, Mömming, Olah, Paradies, Parks, Parks, Piers, Pruckmayr, Pruckmayr, Schulz, Segawa, Stephan, Tran, Travis, Uhl, Welch, Welch, Zaher   +46 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

More London Wordplay [PDF]

, 1990
With the aid of The Wordbook, I have been able to increase somewhat Darryle Francis\u27s collection of transposals, transadditions, and transdeletions on placenames in and near London.
Bulten, John J.
core   +1 more source

Dynamic Reactivity: Reversible Reaction of a Phosphinine–Borane Adduct With Water and Double Hydrophosphination

Chemistry – A European Journal, EarlyView.
A phosphinine–borane Lewis pair shows a dynamic mode of water addition, revealing reversible and regioselective transformations that expand the reactivity of aromatic phosphorus heterocycles and open pathways to stimuli‐responsive systems for catalysis, small‐molecule activation, and functional materials.
Samantha Frank, Ádám Horváth, Júlia Boglárka Horváth, Chiara Interdonato, Moritz J. Ernst, Priya Kumar, Zoltán Benkő, Christian Müller   +7 more
wiley   +1 more source

Rapid and scalable photocatalytic C(sp2)–C(sp3) Suzuki−Miyaura cross-coupling of aryl bromides with alkyl boranes

Nature Communications
In recent years, there has been a growing demand for drug design approaches that incorporate a higher number of sp3-hybridized carbons, necessitating the development of innovative cross-coupling strategies to reliably introduce aliphatic fragments. Here,
Ting Wan, Luca Capaldo, Jonas Djossou, Angela Staffa, Felix J. de Zwart, Bas de Bruin, Timothy Noël   +6 more
doaj   +1 more source

NHI- and NHC-Supported Al(III) Hydrides for Amine–Borane Dehydrocoupling Catalysis

Inorganics, 2019
The catalytic dehydrocoupling of amine−boranes has recently received a great deal of attention due to its potential in hydrogen storage applications.
Catherine Weetman, Nozomi Ito, Masafumi Unno, Franziska Hanusch, Shigeyoshi Inoue   +4 more
doaj   +1 more source

On the Effect of Radical Character, Substitution and Atom Encapsulation on the Volume of Icosahedral (Car) boranes1 [PDF]

, 2008
By means of quantum-mechanical calculations, we study the influence of the charge, spin, substituents, and atom encapsulation on the volume of the cages in icosahedral boranes and carboranes B12H12 2–, CB11H12 –, o-C2B10H12, m- C2B10H12, p-C2B10H12 and 1,
Burgos, José I., Klein, Douglas J., Oliva, Josep M., Serrano-Andrés, Luis   +3 more
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