Über Dialkylidensulfamide

Aldehydes and ketones containing no α-hydrogen atoms yield the corresponding dialkylidene sulfamides both by reacting with sulfamide in presence of a proton acid or of SOCl₂ and by reacting with bis(trichlorphosphazo)-sulfone. The dialkylidene sulfamides of ketones also were obtained by treating ketone imines with sulfamide. Chloral did not react with sulfamide in this way but yielded 3,7-bis-(trichloromethyl)-perhydro-1,5,2,4,6,8-dithiatetrazocine-1,1,5,5-tetroxide.