1-Aza-4-thiacyclohexane-4,4-dioxide derivatives

A compound of formula I ##STR21## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 each independently are lower alkyl, R.sub.1 and R.sub.2 independently together with the carbon atom to which they are bound form a cycloalkyl ring, R.sub.3 and R.sub.4 independently together with the carbon atom to which they are bound form a cycloalkyl ring, or R.sub.1 and R.sub.2 and R.sub.3 and R.sub.4 together with the carbon atom to which they are bound form a cycloalkyl ring, and X is hydrogen;

• unsubstituted alkyl having 1 to 18 carbon atoms;
• alkyl having 2 to 20 carbon atoms which is substituted with hydroxy, carboxy, nitrile, sulphoxide, sulphone, or halo groups;
• --CH.sub.2 COOR.sub.8 where R.sub.8 is alkyl of 1 to 18 carbon atoms;
• --R.sub.9 OOCR.sub.10 where R.sub.9 is alkylene of 2 or 3 carbon atoms and R.sub.10 is alkyl of 1 to 17 carbon atoms;
• ##STR22## where R.sub.11 is alkylene of 2 or 3 carbon atoms and R.sub.12 is alkyl of 1 to 4 carbon atoms;
• ##STR23## --R.sub.13 NHCOR.sub.14 where R.sub.13 is alkylene of 2 or 3 carbon atoms and R.sub.14 is alkyl of 1 to 17 carbon atoms;
• --R.sub.15 OR .sub.16 where R.sub.15 is alkylene or 2 carbon atoms and R.sub.16 is alkyl of 1 to 8 carbon atoms;
• --R.sub.17 SR.sub.18 where R.sub.17 is alkylene of 2 or 3 carbon atoms and R.sub.18 is alkyl of 1 to 8 carbon atoms or phenyl;
• R.sub.19 N(R.sub.20).sub.2 where R.sub.19 is alkylene of 2 or 3 carbon atoms and R.sub.20 is independently H or alkyl of 1 or 2 carbon atoms;
• and --CH.sub.2 CH.sub.2 NHCH.sub.2 CH.sub.2 CN;
• alkenyl having 3 to 18 carbon atoms;
• alkynyl having 3 to 14 carbon atoms;
• benzyl, .alpha.-phenylethyl, .alpha.,.alpha.-dimethyl-benzyl, or such aralkyl groups substituted on the alkylene moiety by hydroxy, ester groups or halogen;
• acyl of the formula R.sub.7 CO-- wherein R.sub.7 is alkyl having 1 to 18 carbon atoms;
• the acyl radical derived from benzoic acid, p-tert. butylbenzoic acid, p-tert. octylbenzoic acid, methanesulfonic acid, benzenesulphonic acid or p-toluenesulfonic acid;
• halogen;
• --O;
• --NO;
• or NR.sub.5 R.sub.6 wherein R.sub.5 and R.sub.6 each independently represent hydrogen;
• unsubstituted alkyl having 1 to 12 carbon atoms;
• alkyl having 2 to 12 carbon atoms which is substituted with hydroxy, carboxy, nitrile, sulphoxide, sulphone or halo groups;
• or R.sub.5 is R.sub.7 CO-- wherein R.sub.7 is alkyl having 1 to 18 carbon atoms;
• or the acyl radical derived from benzoic acid, p-tert. butylbenzoic acid, p-tert. octylbenzoic acid, methanesulfonic acid, benzenesulphonic acid or p-toluenesulfonic acid;
• or R.sub.5 and R.sub.6 together with the nitrogen atom to which they are bound form the piperidine or morpholine ring, or its salts with organic or inorganic acids.