[EN] PROCESS TO PREPARE SULFONAMIDES<br/>[FR] PROCEDE DE PREPARATION DE SULFONAMIDES
申请人:FMC CORP
公开号:WO2001094320A2
公开(公告)日:2001-12-13
A process for the preparation of a sulfonamide of formula (II), comprising reacting at elevated temperature an aniline of formula (I), with a sulfonating agent A of the formula R1-SO2-Z in the presence of a catalytic amount of either: (i) an amide B-1, other than N,N-dimethylformamide, or (ii) a high boiling tertiary amine B-2. Also provided in accordance with the present invention are processes for preparing sulfonamides of formula (II) by reacting an aniline of formula (I) with sulfanating agent A of the formula R1-SO2-Z in the presence of N,N-dimethylformamide, at a temperature in the range of about 120 °C to about 160 °C for about three to about seven hours. X, Y, Z, R and R1 are as defined herein.