Topic
Epoxide
About: Epoxide is a research topic. Over the lifetime, 8777 publications have been published within this topic receiving 168199 citations. The topic is also known as: epoxides.
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TL;DR: In this article, the epoxidation of propylene with hydrogen peroxide in the liquid phase, in the presence of titanium silicalite catalyst (TS-1), is described.
681 citations
TL;DR: Manganese complex of the optically active salen ligand [ N,N '-bis[(S )-3-(1-phenylpropyl)salicylidene]-(1 R,2 R )-1,2-diphenylethylenediaminato] was found to be an effective catalyst for the enantioselective epoxidation of olefins as discussed by the authors.
586 citations
TL;DR: Methane mono-oxygenase of Methylococcus capsulatus (Bath) catalyses the oxidation of various substituted methane derivatives including methanol and, in some of its catalytic properties, apparently resembles the analogous enzyme from Methylomonas methanica but differs from those found in Methylosinus trichosporium and M methylomonas albus.
Abstract: 1. Methane mono-oxygenase of Methylococcus capsulatus (Bath) catalyses the oxidation of various substituted methane derivatives including methanol. 2. It is a very non-specific oxygenase and, in some of its catalytic properties, apparently resembles the analogous enzyme from Methylomonas methanica but differs from those found in Methylosinus trichosporium and Methylomonas albus. 3. CO is oxidized to CO2. 4. C1-C8 n-alkanes are hydroxylated, yielding mixtures of the corresponding 1- and 2-alcohols; no 3- or 4-alcohols are formed. 5. Terminal alkenes yield the corresponding 1,2-epoxides. cis- or trans-but-2-ene are each oxidized to a mixture of 2,3-epoxybutane and but-2-en-1-ol with retention of the cis or trans configuration in both products; 2-butanone is also formed from cis-but-2-ene only. 6. Dimethyl ether is oxidized. Diethyl ether undergoes sub-terminal oxidation, yielding ethanol and ethanal in equimolar amounts. 7. Methane mono-oxygenase also hydroxylates cyclic alkanes and aromatic compounds. However, styrene yields only styrene epoxide and pyridine yields only pyridine N-oxide. 8. Of those compounds tested, only NADPH can replace NADH as electron donor.
581 citations
TL;DR: Methoxybenzyl protecting groups of alcohols were readily and efficiently removed with DDQ in CH2Cl2-H2O at room temperature under these neutral conditions, other usual protecting groups, isopropylidene, methoxymethyl, benzyloxymmethyl, tetrahydropyranyl, acetyl, t-butyldimethylsilyl, benyl, benzoyl, and tosyl, as well as functional groups, epoxide, double bond, and ketone, were remained unchanged as discussed by the authors.
546 citations