Alkenyl-substituted thienylalkanecarboxylic acids and derivatives thereof

摘要

The invention provides novel omega -(5-alkenylthien-2-yl)alkanecarboxylic acids and their functional derivatives having the formula <IMAGE> (I) wherein n is an integer from 1 to 9, inclusive; R1 is H and R2 is -OH, or R1 and R2 together with the wavy lines represent a keto group; and R3 is H, C1-C6 straight or branched-chain saturated hydrocarbon, or a pharmaceutically acceptable alkali cation. The 3-oxoalkenyl-substituted compounds of formula (I) are prepared by a Wittig-Horner reaction using a 2-oxoheptylphosphonic acid dialkyl ester and an aldehyde of the formula <IMAGE> as starting materials, while the 3-hydroxyalkenyl-substituted compounds are obtained by reduction of the corresponding 3-oxoalkenyl compounds. The esters of formula (I) can also be readily converted to the corresponding acids and salts of formula (I). The compounds of the invention have valuable anti-inflammatory, antipyretic and anti-arteriosclerotic properties, yet have low toxicity and do not irritate the gastric mucosa.