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.
4-imino-oxazolidine-2-one derivatives, a process for producing such
申请人:Sagami Chemical Research Center
公开号:US05612289A1
公开(公告)日:1997-03-18
The invention relates to 4-imino-oxazolidine-2-one derivatives represented by the general formula (1): ##STR1## and a process for producing said compounds by reacting aryl isocyanates of the general formula (2): ##STR2## with methacrolein cyanohydrin in the presence of a base, as well as a herbicide containing said compounds as an active ingredient; it also relates to a process for producing oxazolidinedione derivatives useful as herbicides by hydrolyzing said compounds.
Methods of preparing fluorobenzene derivatives and related compounds
申请人:Sagami Chemical Research Center
公开号:US05391807A1
公开(公告)日:1995-02-21
Disclosed are fluorobenzene derivatives, which are important intermediates for producing herbicidal oxazolidinedione derivatives, and methods of producing them. The fluorobenzene derivatives include compounds of a formula (11): ##STR1## where X is a halogen atom, R.sup.3 is a nitro, amino or isocyanato group or R.sup.1 OCONH, and R.sup.1 is an alkyl or phenyl group. Via the intermediates of the invention, oxazolidinedione derivatives can be produced with high yield.
Disclosed are fluorobenzene derivatives, which are important intermediates for producing herbicidal oxazolidinedione derivatives, and methods of producing them. The fluorobenzene derivatives include compounds of a formula (11): ##STR1## where X is a halogen atom, R.sup.3 is a nitro, amino or isocyanato group or R.sup.1 OCONH, and R.sup.1 is an alkyl or phenyl group. Via the intermediates of the invention, oxazolidinedione derivatives can be produced with high yield.
Pyrazole derivative, intermediate therefor, processes for producing these, and herbicide containing these as active ingredient
申请人:Hirai Kenji
公开号:US20050070441A1
公开(公告)日:2005-03-31
The present invention provides a pyrazole derivative of the general formula (1),
which has an excellent efficacy as an active component for a herbicide, an intermediate for the production thereof, processes for the production thereof, and a herbicide containing the derivative as an active ingredient.