申请人:MERCK & CO. INC.
公开号:EP0503885A1
公开(公告)日:1992-09-16
Avermectin analogs are disclosed wherein the 6,6-spiroketal ring system has been reduced in size to a 6,5-spiroketal ring system by the deletion of the 25-position carbon atom and the 25-alkyl substituent. This is accomplished by opening the outer spiroketal ring with the elimination of ring carbon atoms 23, 24 and 25 and the alkyl substituent at the 25-position and incorporation a new component, reclosing the spiroketal to a 5-membered ring with new substituents at the 24-position. The compounds are used as anti-parasitic insecticidal and anti-helmintic agents in humans and animals and compositions containing such compounds as the active ingredient thereof are also disclosed.
本发明公开了阿维菌素类似物,通过删除 25 位碳原子和 25 位烷基取代基,6,6-螺酮环系的体积缩小为 6,5- 螺酮环系。具体做法是通过消除环碳原子 23、24 和 25 以及 25 位上的烷基取代基来打开螺酮醛外环,并加入一个新的成分,从而将螺酮醛重新封闭成一个 5 元环,并在 24 位上加入新的取代基。这些化合物可用作人类和动物的抗寄生虫杀虫剂和抗蠕虫剂,还公开了以这些化合物为活性成分的组合物。