1,3,4-Substituted pyrazoline derivatives

A compound of the formula:

• ##STR11## wherein R.sub.1 is a member selected from the group consisting of alkyl of 1 to 4 carbon atoms, cycloalkyl of 3 to 6 carbon atoms, phenylalkyl wherein the alkyl moiety is of 1-4 carbon atoms, ring halogenated phenylalkyl wherein the alkyl moiety is of 1-4 carbon atoms, ring nitrated phenylalkyl wherein the alkyl moiety is of 1-4 carbon atoms, ring alkylated phenylalkyl wherein the alkyl moiety is of 1-4 carbon atoms, phenyl, phenyl substituted in the 2, 3 or 4 positions with up to two substituents selected from the group consisting of halogen, alkyl of 1 to 4 carbon atoms, halogenated alkyl of 1 to 4 carbon atoms, cycloalkyl of 3 to 6 carbon atoms, alkylthio of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, dialkylamino wherein each alkyl moiety is of 1 to 4 carbon atoms, alkylsulfonyl of 1 to 4 carbon atoms, acyl of an aliphatic saturated monocarboxylic acid, acylamino wherein the acyl moiety is of an aliphatic saturated monocarboxylic acid, nitro, phenyl, halogenated phenyl and cyano, R.sub.2 is a member selected from the group consisting of alkyl of 1 to 4 carbon atoms, cycloalkyl of 3 to 6 carbon atoms, phenyl, phenyl substituted with 1 to 2 substituents selected from the group consisting of halogen, alkyl of 1 to 4 carbon atoms, haloalkyl of 1 to 4 carbon atoms, cycloalkyl of 3 to 6 carbon atoms, alkylthio of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, monoalkylamino of 1 to 4 carbon atoms, dialkylamino wherein each alkyl is of 1 to 4 carbon atoms, nitro, phenyl, halophenyl and cyano, pyridyl, thienyl, halothienyl, nitrothienyl and alkyl substituted thienyl wherein the alkyl is of 1 to 4 carbon atoms, R.sub.3 is a member selected from the group consisting of alkyl of 5 to 10 carbon atoms, alkyl of 1 to 6 carbon atoms substituted with a moiety selected from the group consisting of cycloalkyl of 3 to 6 carbon atoms, alkoxy of 1 to 4 carbon atoms, alkylthio of 1 to 4 carbon atoms, nitro, piperidino, N-methyl-piperazino, halo, cyano, alkoxycarbonyl of 1 to 4 carbon atoms, nitrophenyl, halophenyl, alkyl substituted phenyl wherein the alkyl is of 1 to 4 carbon atoms, phenoxy, phenylthio, phenylsulfenyl, phenylsulfonyl, alkylphenylamino wherein the alkyl is of 1 to 4 carbon atoms, diphenylamino, dialkylamino wherein each alkyl is of 1 to 4 carbon atoms, N,N-dialkylcarbamoyl wherein each alkyl is of 1 to 4 carbon atoms and N,N-dialkylsulfamoyl wherein each alkyl is of 1 to 4 carbon atoms, R.sub.4 is a member selected from the group consisting of hydrogen, alkyl of 1 to 15 carbon atoms, phenylalkyl wherein the alkyl is of 1 to 4 carbon atoms, cycloalkyl of 3 to 6 carbon atoms and halomethylthio and X is a member selected from the group consisting of oxygen and sulfur and with the proviso that when R.sub.1 is phenyl substituted with a moiety selected from the group consisting of phenylthio, phenoxy and phenylalkyl and/or R.sub.4 is a moiety selected from the group consisting of phenylalkyl, cycloalkyl and halomethylthio R.sub.3 may in addition be a member selected from the group as R.sub.2.