Pyrazolo›1,5-a!pyrimidine derivative

A pyrazolo›1,5-a!pyrimidine derivative of the following formula (1):

• ##STR199## wherein R.sup.1 is hydrogen, lower alkyl which may have thienyl, lower alkoxy, lower alkylthio, oxo or hydroxyl as a substituent, cycloalkyl, thienyl, furyl, lower alkenyl, or R.sup.1 phenyl, said R.sup.1 phenyl having 1 to 3 substituents selected from the group consisting of lower alkyl, lower alkoxy, phenylthio and halogen;
• R.sup.2 is naphthyl, cycloalkyl, furyl, thienyl, pyridyl, halogen-substituted pyridyl, phenoxy, halogen-substituted phenoxy, or phenyl which may have 1 to 3 substituents selected from the group consisting of lower alkyl, lower alkoxy, halogen, nitro, halogen-substituted lower alkyl, halogen-substituted lower alkoxy, lower alkoxycarbonyl, hydroxyl, phenyl(lower)alkoxy, amino, cyano, lower alkanoyloxy, phenyl and di(lower)alkoxyphosphoryl(lower)alkyl;
• R.sup.3 is hydrogen, phenyl or lower alkyl;
• R.sup.4 is hydrogen, lower alkyl, lower alkoxycarbonyl, phenyl(lower)alkyl, phenyl, phenylthio-substituted phenyl, or halogen;
• R.sup.5 is hydrogen or lower alkyl;
• R.sup.6 is hydrogen, lower alkyl, phenyl(lower)alkyl, or an R.sup.6 benzoyl, said R.sup.6 benzoyl having 1 to 3 substituents selected from the group consisting of lower alkoxy, halogen-substituted lower alkyl and halogen;
• R.sup.1 and R.sup.5 may conjointly form lower alkylene;
• Q is carbonyl or sulfonyl;
• A is a single bond, lower alkylene or lower alkenylene;
• and n is 0 or 1.