Aniline derivatives and process for producing the same
申请人:NISSAN CHEMICAL INDUSTRIES, LIMITED
公开号:EP0496595A1
公开(公告)日:1992-07-29
The invention relates to the preparation of a sulphonamide of formula (6) by the steps shown in the scheme below.
The invention also relates to the compounds of formulae (1) to (6). A compound of formula (6) is useful as an intermediate in the preparation of a 6-haloalkyl-3-phenyluracil derivative.
Abstract A novel and efficient protocol is developed for the synthesis of various (aminophenyl)carbamicacidesters from the reduction and condensation of nitrophenyl isocyanate derivatives. The reaction takes place in various hydroxy derivatives such as alcohols or phenols under a hydrogen atmosphere using Raney nickel as catalyst. Products are obtained by a convenient one–pot synthesis with excellent