| 摘要 |
<p>A process is provided for production of acylhydrazones of formyl-acetic acid ester of the general formula <IMAGE> wherein R1 is an alkyl group with from 1 to 6 carbon atoms and R2 is an alkoxy group or an amino group. A propiolic acid ester of the general formula H-C 3BOND C-COOR1 is contacted with hydrazine derivatives of the general formula H2N-NH-CO-R2 in the presence of a solvent such as water or a lower alcohol. The resulting products are technically valuable starting materials for the production of biocides, for example of 1,2,3-thiadiazole derivatives.</p> |
