Abstract: A process for preparing substantially single enantiomer d-threo-methylphenidate, proceeds by means of a classical salt resolution using (-)-menthoxyacetic acid.

Abstract: Anthraquinones having .alpha.,.alpha.-(dialkyl)alkyl groups which are functionally substituted, for example by --COOH or --CONH--NH.sub.2, are described. Compositions which contain such anthraquinones, an aminoalcohol and an epoxy resin with or without a hardener are suitable for preparing metallic coatings and images on the cured composition by exposure to light and currentless metal deposition.

Abstract: A process for the manufacture of quaternized diaminoanthraquinones by reacting alpha-nitro-anthraquinone with an amine of the formula ##STR1## to give 1-aminoanthraquinone (B), halogenating, preferably brominating the compound (B) to give 1-amino-4-halogeno- or 1-amino-2,4-dihalogeno-anthraquinone (C), condensing the compound (C) with a diamine of the formula ##STR2## or with an amine of the formula HNR.sub.3 R.sub.7 to give 1,4-diaminoanthraquinone (D) and subsequently quaternizing compound (D) to give the corresponding quaternized anthraquinone compound (E) which process comprises carrying out the condensation of compound (C) with the amine to form compound (D) and subsequent quaternization steps in one single operation without isolation of the intermediate (D).

Abstract: Basic copper salts such as cupric hydroxide, basic copper chloride, basic copper sulfate and the like with an alkanolamine result in an unexpectedly beneficial composition useful in a method for treating bodies of water to arrest or eliminate the growth of algae and aquatic weeds; a more stable and less corrosive solution is obtained for storage purposes when the insoluble basic copper salts are reacted with an alkanolamine such as trialkanolamine or mixtures or tri- and dialkanolamines to produce a water soluble copper complex of the organic compounds; moreover, the formed complex of the insoluble basic salts provides a higher copper content in the solution formed by the complex when compared to the acid, water soluble copper salts; full effectiveness of the complex has been observed for extended period of time without decrease of soluble copper content.