3,4-diarylthiazolin-2-one or -2-thione derivatives, their methods of preparation and their uses in their methods of preparation and their uses in therapeutics

3,4-diarylthiazolin-2-one or 2-thione compounds of the formula (I):

• ##STR15## in which:
• R represents:
• a lower alkyl radical having 1 to 6 carbon atoms,
• a lower haloalkyl radical having 1 to 6 carbon atoms, or
• an --NH.sub..sub.2 group,
• R.sub.1 represents:
• a hydrogen atom,
• a lower alkyl radical having 1 to 6 carbon atoms, or
• a lower haloalkyl radical having 1 to 6 carbon atoms,
• X represents:
• an oxygen atom, or
• a sulphur atom,
• X.sub.1 and X.sub.2 independently represent:
• a hydrogen atom,
• a halogen atom,
• a lower alkyl radical having 1 to 6 carbon atoms,
• a lower haloalkyl radical having 1 to 6 carbon atoms,
• a lower O-alkyl radical having 1 to 6 carbon atoms, or
• an NR.sub.2 R.sub.3 radical in which R.sub.2 and R.sub.3 independently represent a lower alkyl radical having 1 to 6 carbon atoms,
• or even X.sub.1 and X.sub.2 together can form a methylene dioxy group, as well as their addition salts.