| 摘要 |
<p>A process for producing bismethine isoindolines of the formula in which process the condensation of 1 mol of any one of the compounds of the formulae with 2 mols of a cyanomethylene compound of the formula NC-CH2-R1 or NC-CH2-R2, or with 1 mol of a cyanomethylene compound of the formula NC-CH2-R1 and 1 mol of a cyanomethylene compound of the formula NC-CH2-R2, wherein the symbols have the meanings defined in the specification, is performed in a polar solvent in the presence of a strong base, and the bismethine isoindoline obtained is isolated from the reaction mixture by hydrolysis. The bismethine isoindolines are suitable for pigmenting high-molecular organic material, particularly lacquers.</p> |
