An optically-active dialkyl (particularly di-isopropyl) ester of tartaric acid, in which the alkyl groups contain 1 to 6 carbon atoms, preferably in the presence of an inert non-optically active diluent. Specified diluents are aliphatic, cycloaliphatic and aromatic hydrocarbons; lower aliphatic alcohols and cyclohexanol; ketones; carboxylic esters, dimethyl sulphoxide and dimethyl formamide.

Ester of tartaric acid, in which the alkyl groups contain 1 to 6 carbon atoms, preferably in the presence of an inert non-optically active diluent. Specified diluents are aliphatic, cycloaliphatic and aromatic hydrocarbons; lower aliphatic alcohols and cyclohexanol; ketones; carboxylic esters, dimethyl sulphoxide and dimethyl formamide.

Ester of tartaric acid, in which the alkyl groups contain 1 to 6 carbon atoms, preferably in the presence of an inert non-optically active diluent. Specified diluents are aliphatic, cycloaliphatic and aromatic hydrocarbons; lower aliphatic alcohols and cyclohexanol; ketones; carboxylic esters, dimethyl sulphoxide and dimethyl formamide.

Abstract of GB1039969 Racemic hydantoin derivatives of the general formula wherein R1 and R2 may be the same or different and represent hydrogen atoms, alkyl radicals containing up to three carbon atoms, aralkyl radicals or acyl radicals derived from carboxylic acids.

Ester of tartaric acid, in which the alkyl groups contain 1 to 6 carbon atoms, preferably in the presence of an inert non-optically active diluent. Specified diluents are aliphatic, cycloaliphatic and aromatic hydrocarbons; lower aliphatic alcohols and cyclohexanol ketones; carboxylic esters, dimethyl sulphoxide and dimethyl formamide.