Results 261 to 270 of about 1,729,497 (317)
Some of the next articles are maybe not open access.
The Mechanisms of the Stille Reaction
Angewandte Chemie International Edition, 2004AbstractEighteen years ago in Angewandte Chemie John K. Stille reviewed a novel methodology, which eventually became known by his name, for the coupling of organostannanes with organic electrophiles. Since then that seed has blossomed into a multifaceted methodology full of hidden possibilities to explore, discover, and enjoy. Very recent modifications
Pablo, Espinet, Antonio M, Echavarren
openaire +2 more sources
Mechanism of the Dihydroorotase Reaction
Biochemistry, 2004Dihydroorotase (DHO) is a zinc metalloenzyme that functions in the pathway for the biosynthesis of pyrimidine nucleotides by catalyzing the reversible interconversion of carbamoyl aspartate and dihydroorotate. A chemical mechanism was proposed on the basis of an analysis of the effects of pH, metal substitution, solvent isotope effects, mutant proteins,
Tamiko N, Porter +2 more
openaire +2 more sources
Prenyltransferase: the mechanism of the reaction
Biochemistry, 1976The enzyme, prenyltransferase, which normally catalyzes the addition of an allylic pyrophosphate to isopentenyl pyrophosphate, has been found to catalyze the hydrolysis of its allylic substrate. The rate of this hydrolysis is markedly stimulated by inorganic pyrophosphate.
C D, Poulter, H C, Rilling
openaire +2 more sources
Reaction mechanisms: polar reactions
Annual Reports Section "B" (Organic Chemistry), 2012Highlights of mechanistic work pertaining to polar reactions published in 2012 are provided in this report. Such reactions cover a wide range of biologically, chemically and industrially-relevant processes, and although they have been broadly classified here, a number could span one or more general categories.
Hon Man Yau, Anna K. Croft
openaire +1 more source
Reaction mechanisms: pericyclic reactions
Annual Reports Section "B" (Organic Chemistry), 2011This report surveys the 2010 literature on mechanisms of pericyclic reactions. Among the newer concepts highlighted in this year's studies are the distortion-interaction model of reactivity, the importance of CH-π interactions in controlling selectivity, and the catalysis of pericyclic reactions by transition metals and organocatalysts.
Dean J. Tantillo, Jeehiun K. Lee
openaire +1 more source
Reaction mechanisms: pericyclic reactions
Annual Reports Section "B" (Organic Chemistry), 2012This review summarizes a number of articles published in 2011 describing mechanisms of pericyclic reactions. The types of reactions studied were of the cycloaddition sort (e.g., [2+1], [2+2], [3+2], [4+2], etc.), as well as sigmatropic (e.g., [1,2], [1,3], [3,3] shifts, etc.), group transfer (e.g., ene), and electrocyclic types.
Edyta M. Greer, Christopher V. Cosgriff
openaire +1 more source
Mechanism of Oligomerization Reactions of Silica
The Journal of Physical Chemistry B, 2006The mechanism of the oligomerization reaction of silica, the initial step of silica formation, has been studied by quantum chemical techniques. The solvent effect is included by using the COSMO model. The formation of various oligomers (from dimer to tetramer) was investigated.
Trinh, T.T. +2 more
openaire +2 more sources
On the mechanism of the Dakin–West reaction
Organic & Biomolecular Chemistry, 2012The mechanism of the Dakin-West reaction has been thoroughly investigated by monitoring the reaction using ESI-MS/MS techniques in combination with M06-2X/6-311++G(d,p) calculations. Several of the key intermediates in the previously proposed "azlactone" mechanism have been experimentally detected and characterized.
Dalla-Vechia, Luciana +7 more
openaire +4 more sources
Mechanism of Delayed Reactions
Science, 1967Arsanilic acid conjugates of polymers of L-typrosine, glutamic acid, and alanine are immunogenic and can elicit hapten-specific, delayed-hypersensitivity reactions in sensitized guinea pigs. Conjugates of the D-amino acid polymers are neither immunogenic nor capable of eliciting delayed reactions.
openaire +2 more sources
The reaction mechanism of catalase
Experientia, 1962Es werden polarographische Befunde mitgeteilt, welche den von Westheimer vorgeschlagenen Mechanismus der Zersetzung von Wasserstoffperoxyd durch Katalase erganzen.
openaire +2 more sources