Antiinflammatory 5-substituted-2,3-diarylthiophenes

A compound of the formula:

• ##STR14## where R.sup.1 =mono- or polyfluoro C.sub.1 -C.sub.6 alkyl or C.sub.1 -C.sub.6 alkyl;
• n=0, 1 or 2;
• R.sup.3 and R.sup.4 independently=pyridyl or ##STR15## X=H, F, Cl, Br, NO.sub.2, C.sub.1 -C.sub.2 alkyl, C.sub.1 -C.sub.2 alkoxy, di(C.sub.1 -C.sub.2 alkyl)amino, or S(O).sub.m R.sup.2 ;
• where
• m=0, 1 or 2;
• and
• R.sup.2 =CH.sub.3 or C.sub.2 H.sub.5 ;
• Y=H, F or Cl with the proviso that when Y is F or Cl, then X is F or Cl;
• R.sup.5 =H, C.sub.1 -C.sub.4 alkyl or allyl;
• provided
• (a) when R.sup.1 =C.sub.1 -C.sub.6 alkyl, R.sup.3 and R.sup.4 cannot both be phenyl;
• or
• (b) when n=2, R.sup.3 and R.sup.4 cannot both be phenyl.