Oxazole and thiazole compounds of the following formula are photodynamic insecticides and acaricides as well as nematicides: ##STR1## wherein W is selected from O and S; R.sub.2 is selected from optionally substituted thienyl and optionally substituted phenyl; R.sub.4 is selected from hydrogen, lower alkyl, lower haloalkyl, thienyl, tri(lower alkyl)silyl, and optionally substituted phenyl; R.sub.5 is selected from optionally substituted thienyl and optionally substituted phenyl; at least one of R.sub.2 and R.sub.5 is an optionally substituted thienyl group, and R.sup.4 is other than hydrogen when R.sup.4 and R.sup.5 are each unsubstituted phenyl or thienyl.
以下式子中的
噁唑和
噻唑化合物是光动力
杀虫剂、
杀螨剂和线虫杀剂:##STR1##其中,W从O和S中选择; R.sub.2从可选取的取代
噻吩基和可选取的取代苯基中选择; R.sub.4从氢、低碳基、低卤代烷基、
噻吩基、三(低碳基)
硅基和可选取的取代苯基中选择; R.sub.5从可选取的取代
噻吩基和可选取的取代苯基中选择; R.sub.2和R.sub.5中至少有一个是可选取的取代
噻吩基,且当R.sup.4和R.sup.5均为未取代的苯基或
噻吩基时,R.sup.4不是氢。