Cyclo-carbonate-contg. ester(s) - by reaction of corresp. cyclo-carbonate-alcohol(s) with mono- or di-carboxylic acids in the presence of acid catalyst and solvent

摘要

Esters-contg. cyclic carbonate gps., of formula R1COOR and ROOC-Y-COOR (IA/IB), are produced by reaction of carboxylic acids R1COOH (IIA) and HOOC-Y-COOH (IB) with the corresp. alcohol ROH (III) at elevated temp. in a solvent or solvent mixt., in the presence of an acid catalyst. In (IV) R = a gp. of formula (IV) (with R2 = H or a substd. or unsubstd. Me gp.; X = divalent (cyclo)aliphatic, aromatic, araliphatic or ether-contg., substd. or unsubstd. 1-20C hydrocarbylene); R1 = H, 1-20C satd. or unsatd., linear, branched or cyclic, aromatic or araliphatic substd. or unsubstd. hydrocarbyl, or a 1-20C ether residue with up to 3 O atoms; Y = 1-20C aliphatic hydrocarbylene. USE/ADVANTAGE - (IA/IB) have various possible applications in the chemical and pharmaceutical industries, esp. in the prodn. of polyurethanes. The invention provides a simple, low-cost process for the prodn. of these esters from a wide range of readily available acids; reaction times are shorter and yields are higher than in prior-art processes.