Ester(s) from di:cyclo:pentadiene and carboxylic acids - by reaction in the presence of boron tri:fluoride, followed by fractional vacuum distn. to isolate the pure ester

摘要

A process for producing esters (I) from dicyclopentadiene (II) and 1-5C carboxylic acid(s) (III), by reacting (II) with (IIII) in the presence of BF3. The novelty is that (I) are isolated from the reaction mixt. by fractional distn. under reduced pressure. Pref. the various distn. fractions are combined, mixed with more 1-5C acid (III), and reacted again with (II). (III) is an alpha, beta-mono-unsatd. acid, pref. acrylic acid. USE/ADVANTAGE - (I) are useful as perfume materials (esters of satd. acids) and auxiliary monomers for the prodn. of polymers (unsatd. esters). The invention provides a simpler method for isolating pure (I) from the reaction mixt.; prior-art extraction methods are complicated by the formation of stable emulsions