Definition, Betydelse & Anagram | Engelska ordet ANHYDRIDES

Definition av ANHYDRIDES

1. böjningsform av anhydride

Exempel på hur man kan använda ANHYDRIDES i en mening

• Epoxy resins may be reacted (cross-linked) either with themselves through catalytic homopolymerisation, or with a wide range of co-reactants including polyfunctional amines, acids (and acid anhydrides), phenols, alcohols and thiols (sometimes called mercaptans).
• He also worked on acid anhydrides, and synthesized acetylsalicylic acid, albeit in an unstable and impure form.
• It also efficiently reduces acyl chlorides, anhydrides, α-hydroxylactones, thioesters, and imines at room temperature or below.
• Like most acid anhydrides, the carbonyl carbon atom of acetic anhydride has electrophilic character, as the leaving group is carboxylate.
• In 1849 he discovered anhydrous nitric acid (nitrogen pentoxide), a substance interesting as the first obtained of the so-called "anhydrides" of the monobasic acids.
• Mixed (or unsymmetrical) acid anhydrides, such as acetic formic anhydride (see below), are known, whereby reaction occurs between two different carboxylic acids.
• Dephosphorylation and its counterpart, phosphorylation, activate and deactivate enzymes by detaching or attaching phosphoric esters and anhydrides.
• Because of its basicity, DMAP is a useful nucleophilic catalyst for a variety of reactions such as esterifications with anhydrides, the Baylis-Hillman reaction, hydrosilylations, tritylation, the Steglich rearrangement, Staudinger synthesis of β-lactams and many more.
• The acyl azide is usually made from the reaction of acid chlorides or anhydrides with sodium azide or trimethylsilyl azide.
• Various types of curing agents, used in FBE manufacture, include dicyandiamide, aromatic amines, aliphatic diamines and organic acid anhydrides.
• Acylals are obtained by reaction of carbonyls with acetic anhydride or other acid anhydrides and a suitable catalyst, for instance with sulfated zirconia at low temperatures when used as protective groups for aldehydes.
• The Allan–Robinson reaction is the chemical reaction of o-hydroxyaryl ketones with aromatic anhydrides to form flavones (or isoflavones).
• Formyl fluoride undergoes the reactions expected of an acyl halide: alcohols and carboxylic acids are converted to formate esters and mixed acid anhydrides, respectively.
• Boroxine derivatives (boronic anhydrides) such as trimethylboroxine and triphenylboroxine also make up a broader class of compounds called boroxines.
• FEZ Grodnoinvest residents export a wide range of products of the chemical industry (acids and anhydrides, polyesters, fertilizers), agriculture (rapeseed and soybean oil), woodworking (wood-shaving and fibreboards, furniture), light industry (hosiery), mechanical engineering and metalworking (wires, auto components), etc.
• LAB reagents reduce a wide range of functional groups: aldehydes, ketones, esters, lactones, amides, anhydrides, oximes, nitriles, epoxides and halides.
• The in situ formation of the symmetric aliphatic anhydride is proposed to explain the regioselectivity observed in the reactions of aliphatic acids, based on the fact that aliphatic carboxylates are more nucleophilic, and aliphatic anhydrides are more electrophilic towards DMAP and alcohol than their counterparts.
• The Kostanecki acylation is a method used in organic synthesis to form chromones or coumarins by acylation of O-hydroxyaryl ketones with aliphatic acid anhydrides, followed by cyclization.
• Shiina macrolactonization (or Shiina lactonization) is an organic chemical reaction that synthesizes cyclic compounds by using aromatic carboxylic acid anhydrides as dehydration condensation agents.
• Aromatic carboxylic acid anhydrides are used as dehydration condensation agents not only for the intermolecular coupling of carboxylic acids with alcohols but also for the intramolecular cyclization of hydroxycarboxylic acids (Shiina macrolactonization).

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