Anagram & Information om | Engelska ordet ACETALS

Exempel på hur man kan använda ACETALS i en mening

• The Greek prefix hèmi means half, refers to the fact that a single alcohol has been added to the carbonyl group, in contrast to acetals or ketals, which are formed when a second alkoxy group has been added to the structure.
• Selective acetalization of carbohydrate and formation of acetals possessing atypical properties is achieved by using arylsulfonyl acetals.
• The related reaction of trimethylsilyl chloride with alcohols can be exploited to produce anhydrous solutions of hydrochloric acid in alcohols, which find use in the mild synthesis of esters from carboxylic acids and nitriles as well as, acetals from ketones.
• McElvain was known for his research on the mechanism of the Claisen condensation and on the chemistry of ketene acetals.
• It is used for deprotecting acetals and ketals to aldehydes and ketones, and for converting epoxides into alkenes and aldoximes into nitriles.
• It is also unaffected by 50% trifluoroacetic acid (TFA), and survives the harsh acidic conditions used to install and remove isopropylidene or benzylidene acetals.
• Site-selective reduction of acetals and ketals whose oxygens are inequivalent have been reported—the example below is used in a synthesis of Tamiflu.
• For example, using a simple chiral thiourea catalyst, the asymmetric Mannich reaction of aromatic imines with silyl ketene acetals can be catalyzed with high ee in near quantitative conversion.
• He developed the paradigm of Lewis base activation of Lewis acids and successfully applied it to the asymmetric addition of a broad range of nucleophiles to silyl ketene acetals, iodo- and bromo-functionalization of alkenes, and enantioselective thio- and seleno-functionalization of alkenes.
• in organic chemistry from the University of Wisconsin in the field of substituted ketene acetals and related orthoesters.
• This is a list of corticosteroid cyclic ketals, including cyclic ketals (cyclic acetals) of steroidal glucocorticoids and mineralocorticoids.
• It is an ambident nucleophile, able to react with various alkyl halides, acetals, aldehydes, unsaturated compounds, aziridines, oxiranes, polycyclic aromatic hydrocarbons, and acetylated hexoses to form either thiocyanate or isothiocyanate structures.
• Further radical modes of reactivity include radical substitutions on weak C-H bonds to form α‐azido ethers, benzal acetals, and aldehydes, and the conversion of aldehydes to acyl azides.
• TTMPP removes the trimethylsilyl group from ketene silyl acetals (the enol ether of esters) to give enolates that can then act as strong nucleophiles.
• An alternative synthesis was proposed in 1984, using a methodology employing Diels–Alder additions of napthoquinones to mixed trimethylsilyl vinylketene acetals as a route to synthetic hydroxyanthraquinones.

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