α-Amino-sulphonic acid derivatives. Part I. Synthesis of Δ²-1,2,4-thiadiazoline 1,1-dioxides

N-Perfluoroalkylsulfonylimido derivatives of arenecarboxylic acid amides and their oxidative aza Hofmann rearrangement

“…The preparations of N-methylsulfonyl benzcarboximidoyl chloride [12] N-phenylsulfonyl benzcarboximidoyl chloride [13], N-trifluoromethylsulfonyl arenecarboximidoyl chlorides 1a-c [6,14], and N-nonafluorobutylsulfonyl-4-fluorobenzcarboximidoyl chloride [6] were described previously. Compounds 1d,e were synthesized from the corresponding N-trifluoromethylsulfonyl benzamides according to the literature procedure [6].…”