Novel bicyclooxyphenyl ureas, process for their preparation and pesticides containing them
申请人:UNION CARBIDE CORPORATION
公开号:EP0050321A2
公开(公告)日:1982-04-28
Novel bicyclooxyphenyl ureas, such as 1-(bicyclooxyphenyl)-benzoyl ureas, are provided which exhibit pesticidal activity. The compositions are conveniently prepared by reacting an isocyanate with either an amide or a bicyclooxyaniline.
A process for the preparation of benzoyl ureas is provided wherein the condensed intermediate formed by the reaction of a halogen-substituted nitrobenzene with a hydroxy-substituted cyclic or bicyclic compound is contacted with water, forming a solid or semi-solid which is easily isolated. Reduction of the nitro compound to the corresponding amine and subsequent carbamoylation of the amine with an isocyanate are all conducted in the same solvent.