申请人:Ciba-Geigy Corporation
公开号:US05220062A1
公开(公告)日:1993-06-15
There is disclosed a multi-step process for the preparation of benzenesulfonamides of general formula ##STR1## wherein R is 3,3-difluorobutyl or 3,3-difluorobuten-1-yl. The benzenesulfonamides obtainable by the process of the invention are intermediates for the synthesis of herbicidally active sulfonyl ureas.
本发明公开了一种多步骤的过程,用于制备通式为##STR1##的苯磺酰胺,其中R为3,3-二氟丁基或3,3-二氟丁烯-1-基。本发明的工艺获得的苯磺酰胺是合成具有除草活性的磺酰脲的中间体。