申请人:Sagami Chemical Research Center
公开号:US05639915A1
公开(公告)日:1997-06-17
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.
高效生产苯胺衍生物的工业过程,这些衍生物是制造噁唑烷二酮衍生物和四氢邻苯二甲酰亚胺衍生物的重要中间体,后者作为除草剂的活性成分。该过程从2,4-二卤-5-氨基酚或双(2,4-二卤-5-氨基苯基)碳酸酯开始,并在不保护氨基的情况下选择性地使羟基发生环烷基化或炔基化反应,从而可以高产率地生产具有环烷氧基或炔氧基的苯胺衍生物。