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Showing 1 to 12 of 12 for “"alcoholysis"”.
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Part I. Anionic Acyl Transfer Catalysis;Part II. Enantioselective alcoholysis of Acyl Donors;Part III. Enantioselective N-acylation
<p>Neutral Lewis bases, such as 4-(dimethylamino)pyridine and N-methylimidazole, are widely used as acyl transfer catalysts. In contrast, anionic nucleophiles have been little explored in acyl transfer catalysis, although their high nucleophilicity may enable unique applications. In the course of …
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Metal-Ion Catalyzed Alcoholysis Based Disclosure Solution for the Detection of CW Nerve Agents on Sensitive Materials for Spray and Wipe-Based Applications
… which combine La(III) metal-ion catalyzed alcoholysis (MICA) and chromogenic sensors. Since the strategy utilizes alcohol at neutral conditions, it can be employed to disclose CWA on sensitive materials. Three novel strategies are investigated for the detection of the phosphonofluoridates, …
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Kinetic Resolution of N-Acyl-b-Lactams, b-Lactams, and N-Acyl-Thiolactams using Amidine-Based Catalysts
… acylation) and Type III: enantioselective alcoholysis of α-substituted acids and azlactones) processes.</p><p>As a contribution and an extension to enantioselective, catalytic, nucleophilic acyl substitution study with ABCs, my work has left a mark in all three types of processes discussed …
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Studies of metaphosphate acids and metaphosphate anhydrides in aprotic media
… regenerate metaphosphate acids, or alternatively alcoholysis to generate metaphosphate esters. Alcoholysis of metaphosphiate anhydrides presents a novel method to quantitatively phosphorylate organic substrates, of particular interest are substrates of biological significance such as nucleosides. …
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Synthesis, characterization, and evaluation of a heat stabilizing siloxane
… functional alcohol (4-(phenylamino)-phenol). The alcoholysis (or dehydrogenative coupling) moves forward with the removal of hydrogen and formation of the desired product (Scheme 1). Reactions were conducted on both NMR scale and lab scale.</p> <p>The results of the synthesis were characterized …
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Activation of white phosphorus by molybdenum- and uranium tris-amides
… molybdenum derived from the element P4 and their alcoholysis products are presented. The uranium tris-amide compounds (THF)U(N[R]Ar)₃ (R = t-Bu, 1-Ad) reacted with white phosphorus. The unique products contain a square tetraphosphorus moiety characterized formally as the dianion P₄â¡â¡₂â. …
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Synthesis and reactions of antimony allyloxides
… and 3-Methyl-3-buten-1-oxide) by metathesis and alcoholysis methods (∼70% yield) were synthesized. Compounds of the formula SbMe(OR)2 and SbMe2(OR) (where OR = allyl oxide, 3-Methyl-2-buten-1-oxide, 2-Methyl-3-buten-2-oxide, and 3-Methyl-3-buten-1-oxide) were synthesized only by a metathesis …
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The Effect of Hydration on Enzyme Activity and Dynamics
… and C. rugosa lipase B are able to catalyse alcoholysis reactions in which an acyl group is transferred between an ester and an alcohol. Therefore, by following this reaction and using a gas phase catalytic system, we have been able to show that activity can occur at 0 g/g. These results led …
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Microalgal Biodiesel Production through a Novel Attached Culture System and Conversion Parameters
… chemical reaction known as transesterification, alcoholysis, or commonly, methylation, when methanol is the alcohol used. There are several different transesterification methods. By simplifying the reaction conditions and examining the effects in terms of maximum fatty acid methyl esters (FAME) …
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Poly(p-xylylene) Nanotubes Prepared via the Tubes by Fiber Templates Process as Catalytic Nanoreactors
… of dimethylphenylsilane and the corresponding alcoholysis with n-butanol gave the corresponding product in quantitative yield at room temperature. After removal of the tea bag-like catalyst system, no product purification was necessary. Further, the catalyst was reused 20 times with no decrease …
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Investigations of catalyst behaviour in the formation of polyurethanes
… show that catalysis takes place due to the alcoholysis of the coordinately saturated titanium complex to give a five-coordinated intermediate. The nitrogen atom on the isocyanate molecule then coordinates with the titanium centre to undergo an insertion reaction to form the titanium …
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In-situ steric stabilization of ultrafine titania particles synthesized by a sol-gel process
… growth rate studies show that HPC can undergo an alcoholysis reaction with tetraethylorthotitanate when mixed in the absence of water. Electrophoresis measurements show the absence of any significant electrostatic stabilization effects under conditions giving the smallest particle sizes. In …