Bayer Aktiengesellschaft

Gerhard Dankert

Gunther Beck

Fritz Doring

Manfred Lenthe

Klaus Recker

Gerhard Groegler

Josef Backes

2,4,5-Trichloropyrimidine is obtained by reacting 2-cyanoethyl isocyanide dichloride with hydrogen chloride and then reacting the product with chlorine.

Process for the preparation of 2,4,5-trichloropyrimidine

Process for the preparation of tetrachloropyrimidine, characterized in that 2-cyanoethyl isocyanide dichloride is reacted with chlorine in the gas phase in the temperature range from 200.degree.-650.degree. C.

2-Cyanoethyl isocyanide dichloride

In the preparation of chlorinated N-methyl-imidazoles and N-methyl-imidazolines of the formula ##STR1## in which n represents the number 0, 1, 2 or 3 and

Preparation of chlorinated N-methyl-imidazoles and N-methyl-imidazolines

Process for the preparation of tetrachloropyrimidine

In the recovery of N,N-dimethylaminoacetonitrile from a mixture thereof with water by extraction with an organic solvent thereby to form an aqueous phase and an organic solvent phase containing the nitrile, separating the organic phase, and recovering the nitrile from the organic solvent, the improvement which comprises employing 1,2-dichlorobenzene as the organic solvent. Recovery of the nitrile from the organic solvent can be accomplished by distilling of the nitrile, the undistilled solvent being recycled for further use.

Process for isolating N,N-dimethylaminoacetonitrile from water mixtures

1-SUBSTITUTED 2-METHYL-TETRAHYDROPYRIMIDINES ARE PREPARED BY REACTING AN N-substituted propylene diamine with an acetoacetic acid ester or amine at a temperature of from 0.degree. to 80.degree. C and removing the water produced in the reaction at a temperature of from 0.degree. to 80.degree. C.

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Cologne, Germany

Gerhard Dankert