申请人:Hoechst Aktiengesellschaft
公开号:US04487725A1
公开(公告)日:1984-12-11
The invention relates to salt-free N-acetylaminoarylsulfonic acids, their preparation by acetylation with acetic anhydride or acetyl chloride, sulfuric acid, which can also contain a small amount of water and/or dimethylformamide and/or N-methylpyrrolidone, serving as the solvent, and the use of the N-acetylaminoarylsulfonic acids for the preparation of their acid chlorides.
这项发明涉及无盐N-乙酰氨基芳基磺酸,其通过用乙酸酐或乙酰氯、硫酸对乙酸酐或乙酰氯进行乙酰化制备,硫酸可以含有少量水和/或二甲基甲酰胺和/或N-甲基吡咯烷酮,作为溶剂,并且利用N-乙酰氨基芳基磺酸制备它们的酸氯化物。