Esters are chemical compounds derived from an acid where at least one -OH (hydroxyl) group is replaced by an -O- (alkoxy) group, while ethers are a class of organic compounds that contain an oxygen atom connected to two alkyl or aryl groups.
1. formed by reaction between an acid and an alcohol with elimination of water 行业词典 化学 酯 医学 酯:醇和酸脱水所形成的化合物,如羧酸酯,R-O-CO-R ,磷酸酯(有机磷酸酯),R-PO 4 2- 酯类都是作为其母本酸的盐而命名的,如醋酸甲酯,葡萄糖6-磷酸酯...
(Chemistry)chemany of a class of compounds produced by reaction between acids and alcohols with the elimination of water. Esters with low molecular weights, such as ethyl acetate, are usually volatile fragrant liquids; fats are solid esters ...
The meaning of ESTER is any of a class of often fragrant organic compounds that can be represented by the formula RCOOR' and that are usually formed by the reaction between an acid and an alcohol with elimination of water.
But, in those cases where the cation is less easily formed, ester formation was favoured and, consequently, became the necessary elementary step towards alkyl halide formation. This final product, on the other hand, might be extremely slow to form in an SN2 reaction between the protonated ester...
The meaning of ESTER is any of a class of often fragrant organic compounds that can be represented by the formula RCOOR' and that are usually formed by the reaction between an acid and an alcohol with elimination of water.
any organic combining groups), are commonly prepared by reaction of carboxylic acids and alcohols in the presence ofhydrochloric acidor sulfuric acid, a process calledesterification. In the reaction thehydroxyl group(OH) of the carboxylic acid is replaced by the alkoxy group (R′O) of thealcohol...
A highly selective vinylogous Michael reaction between γ-butenolides andchalconesis possible using simple C2-symmetric amine21andhexanedioic acidas activators (Table 12). Despite the somewhat low yields and the long reaction times interesting furanones can be accessed with this method. It is currentl...
The reaction proceeds readily with model compounds in low-density polyethylene, in the absence of any mineral acid as a catalyst. The temperature range for the study was between 130 and 190°C. The activation energy found for the reaction, 14–15 kcal/mole is comparable with the values found...
Although IX reacts with sodio malonic ester, the products are derived by addition of the reagent to IX acting as an α,β-unsaturated nitro compound, and no α-pyrone is formed. Hence, IX cannot be a precursor of the α-pyrone formed from I. The one remaining compound in the sequence ...