申请人:Uniroyal, Inc.
公开号:US04394155A1
公开(公告)日:1983-07-19
Compounds of the following formula are effective as premergence herbicides: ##STR1## wherein R and R.sup.1 may be the same or different and are C.sub.1 to C.sub.4 alkyl, C.sub.1 to C.sub.4 alkoxy, phenyl or halogen, provided that R or R.sup.1 is not halogen if attached in the 3- position of the pyridine ring, and R or R.sup.1 may further be hydrogen provided that one of them is one of the recited moieties other than hydrogen; R.sup.2 is hydrogen, halogen, methyl or ethyl; R.sup.3 is phenyl or phenyl substituted with halogen, C.sub.1 to C.sub.4 alkyl, C.sub.1 to C.sub.4 alkoxy, or nitro; and n is 1 or 2.
以下化合物的化学式可用作预防除草剂:##STR1##其中R和R.sup.1可以相同或不同,是C.sub.1到C.sub.4烷基,C.sub.1到C.sub.4烷氧基,苯基或卤素,前提是如果连接在吡啶环的3-位置,则R或R.sup.1不是卤素,并且R或R.sup.1还可以是氢,前提是其中一个不是氢,而是上述其他基团之一;R.sup.2是氢,卤素,甲基或乙基;R.sup.3是苯基或用卤素,C.sub.1到C.sub.4烷基,C.sub.1到C.sub.4烷氧基或硝基取代的苯基;n为1或2。