Industrial process for the efficient production of aniline derivatives which are important intermediates for the manufacture of oxazolidinedione derivatives and tetrahydrophthalimide derivatives which are useful as active ingredients of herbicides. The process starts from 2,4-dihalo-5-aminophenol or bis(2,4-dihalo-5-aminophenyl)carbonate and selectively cycloalkylates or alkynylates the hydroxy group without protecting the amino group, whereby aniline derivatives having the cycloalkyloxy group or alkynyloxy group can be produced in high yield.
Benzene derivatives substituted with heterocyclic ring, and herbicides
申请人:Sagami Chemical Research Center
公开号:US05424277A1
公开(公告)日:1995-06-13
A benzene derivative substituted with a heterocyclic ring represented by the general formula: ##STR1## wherein R represents a cycloalkyl group having 3 to 8 carbon atoms, X represents a halogen atom, and Z represents ##STR2## in which said cycloalkyl group may be substituted with an alkyl group having 1 to 6 carbon atoms, a process for preparing the same, and a herbicidal agent comprising the above compound as an active ingredient are disclosed. The compound has an excellent effect in that the compound exhibits a markedly high herbicidal effect on weeds in the field and the paddy field at a low dose and yet exhibits markedly low noxious effects on main crops.
Benzene derivatives substituted with heterocyclic ring and herbicides
申请人:Sagami Chemical Research Center
公开号:US05464811A1
公开(公告)日:1995-11-07
A benzene derivative substituted with a heterocyclic ring represented by the general formula: ##STR1## wherein R represents a cycloalkyl group having 3 to 8 carbon atoms, X represents a halogen atom, and Z represents ##STR2## in which said cycloalkyl group may be substituted with an alkyl group having 1 to 6 carbon atoms, a process for preparing the same, and a herbicidal agent comprising the above compound as an active ingredient are disclosed. The compound has an excellent effect in that the compound exhibits a markedly high herbicidal effect on weeds in the field and the paddy field at a low dose and yet exhibits markedly low noxious effects on main crops.
HETEROCYCLE-SUBSTITUTED BENZENE DERIVATIVE, PRODUCTION THEREOF, AND HERBICIDE CONTAINING THE SAME AS ACTIVE INGREDIENT
申请人:SAGAMI CHEMICAL RESEARCH CENTER
公开号:EP0493606A1
公开(公告)日:1992-07-08
A heterocycle-substituted benzene derivative represented by general formula (I) wherein R represents C₃ to C₈ cycloalkyl, X represents halogen, and Z represents (Ia) or (Ib) provided that the cycloalkyl may be substituted with C₁ to C₆ alkyl. This compound is excellent in that it has a remarkably high herbicidal effect against weeds growing in both upland and lowland fields in a low dose, while it has a remarkably low phytotoxicity against main crops.
Methods of preparing fluorobenzene derivatives and related compounds
申请人:SAGAMI CHEMICAL RESEARCH CENTER
公开号:EP0496347A2
公开(公告)日:1992-07-29
Disclosed are fluorobenzene derivatives, which are important intermediates for producing herbicidal oxazolidinedione derivatives, and methods of producing them. The fluorobenzene derivatives include compounds of formula (11):
where X is a halogen atom, R³ is a nitro, amino or isocyanato group or R¹OCONH, and R¹ is an alkyl or phenyl group. Via the intermediates of the invention, oxazolidinedione derivatives can be produced with high yield.
本发明公开了作为生产除草剂噁唑烷二酮衍生物重要中间体的氟苯衍生物及其生产方法。氟苯衍生物包括式(11)化合物:
其中 X 为卤素原子,R³ 为硝基、氨基或异氰酸基或 R¹OCONH,R¹ 为烷基或苯基。通过本发明的中间体,可以高产率生产噁唑烷二酮衍生物。