TRIFLUOROMETHANESULFONAMIDE DERIVATIVES, PROCESS FOR THEIR PREPARATION, AND HERBICIDES CONTAINING SAME.

摘要

Cpds. of formula (I) are new, where X is H, halogen, 1-4C alkyl or 1-4C haloalkyl; n is 1, 2 or 3; A is -O-CR3R4-, -S-CR3R4, -SO-CR3R4-, -SO2-CR3R4 or -SO2-NR3-; R1 to R4 are H or 1-4C alkyl; and Q is -SO2CF3. Prepn. involves reaction of (I, Q = H; A is not -SO-CR3R4 or -SO2-CR3R4) with trifluoromethanesulphonic anhydride or trifluoromethanesulphonyl halide gives (I, Q = SO2CF3). Cpds. (I, A = -SO-CR3R4 or -SO2-CR3R4) may be obtd. by oxidn. of (I, A = -S-CR3R4-).