[Synthesis and biologic activity of some stable structure analogs of platelet activating factor]

Physiologically stable structure analogues of the platelet-activating factor (PAF-acether), the acetyl group of which had been substituted by short-chain alkyl rests, had been synthesized and been tested with regard to their biological activity against thrombocytes. Five differently substituted 2-alkylmalonic acid esters with methyl rest up to n-pentyl rest had been applied the basic products. The n-propyl compound exhibits the most intense biological activity, which is, however, essentially reduced against the PAF-acether. With conditions of the examination, all the other derivatives possess a more decreased activity.