The benzoxazine derivatives are a new chemical family of diphenyl ether herbicides, which exhibit a strong peroxidizing herbicidal activity on mono- and dicotyledonous species in preemergence and postemergence tests. Twenty derivatives were synthesized, and their herbicidal activity was determined to examine structure-activity relationships. Among the compounds investigated, it was found that the fluorine atom introduction into the trifluoromethylbenzene moiety together with an oxazine ring instead of a nitro group led to the most active herbicide.
The benzoxazine derivatives are a new chemical family of diphenyl ether herbicides, which exhibit a strong peroxidizing herbicidal activity on mono- and dicotyledonous species in preemergence and postemergence tests. Twenty derivatives were synthesized, and their herbicidal activity was determined to examine structure-activity relationships. Among the compounds investigated, it was found that the fluorine atom introduction into the trifluoromethylbenzene moiety together with an oxazine ring instead of a nitro group led to the most active herbicide.
Benzoxazine derivatives, benzothiazine derivatives and herbicides comprising the same
申请人:SUNTORY LIMITED
公开号:EP0434440A1
公开(公告)日:1991-06-26
A benzoxazine derivative and a benzothiazine derivative having the formula (I):
wherein
A is N or a CH group;
B is O, S, an SO group or an SO₂ group;
W is O, S, a CR⁴R⁵ group or an NR⁴ group wherein R⁴ and R⁵ are each independently a hydrogen atom, a CN group or an NO₂ group;
X, Y and Z are each independently a hydrogen atom, a halogen atom or a lower haloalkyl group having 1 to 3 carbon atoms;
R¹ is a hydrogen atom, a lower alkyl group having 1 to 5 carbon atoms, a lower alkenyl group having 2 to 5 carbon atoms, a lower alkynyl group having 2 to 5 carbon atoms, a lower hydroxyalkyl group having 1 to 5 carbon atoms or a lower haloalkyl group having 1 to 3 carbon atoms; and
R² and R³ are each independently a hydrogen atom, a lower alkyl group having 1 to 5 carbon atoms or an aryl group having 6 to 10 carbon atoms and a herbicidal composition containing the compound of the formula (I) as an active ingredient.