Abstract: Cyclic sulphates of formula ##STR1## in which R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, and R.sub.6, which are identical or different, each denote hydrogen, halogen, alkyl, alkoxy, aryloxy or alkoxycarbonyl and n is 0 or 1, are prepared by rapid reaction, at a temperature of 150.degree. to 250.degree. C.

Abstract: A method of combating acarids which comprises applying to such acarids or to an acarid habitat an acaricidally effective amount of an azomethine of 2,3-diaminomaleic acid nitrile of the formula ##STR1## in which X represents halogen, halogenoalkyl or CN and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 can be identical or different and represent hydrogen, optionally substituted alkyl, optionally substituted alkoxy, halogen, CN, NO.sub.2, optionally substituted dialkylamino, alkoxycarbonyl, optionally substituted alkylthio, optionally substituted alkylthionyl, optionally substituted alkylsulphonyl, OH, SH or NH.sub.2. The compounds other than the 2-chloro-and 2,6-dichloro-toluylideneamino-compounds are new.

Abstract: 3,3-diphenylacrylic acid amides are prepared by the reaction of a benzophenone with an acetamide in the presence of an alkali metal tertiary alcoholate characterized in that an alkali metal mono-alkyl carbonate is additionally present.

Abstract: Substituted thiazoles, oxazoles and 2-hydroxy morpholine compounds useful in the treatment of diabetes mellitus and obesity are described.