1,2,4-oxidiazole and thiadiazole esters and composition containing same

Abstract From the Canadian patent

1,2,4-Oxadiazole and thiadiazole esters are disclosed of the general formula, or , wherein A is oxygen or sulfur R1 is lower alkyl having 1-6 carbon, atoms benzyl, substituted benzyl wherein the substituent is nitro, lower alkyl having 1-6 carbon atoms or halogen lower, alkenyl having 1-6 carbon atoms furymethyl, cyclopentenylmethyl, cyclopentylmethyl cyclohexenymethyl, cyclohexylmethyl and R2 is the residue of a carboxylic acid selected from (+)trans-chrysanthemumic acid, (?)-cis, trans-chrysanthemumic acid dimethylcyclopropanecarboxylic acid, tetramethylcyclopropanecarboxlic acid, dihalocycopropanecarboxylic acid tetrahalo-, cyclopropanecarboxylic acid and fenethric acid. These esters are …