A process of preparing a 5-amino-3-substituted pyrazole of formula (I) ##STR1## wherein R is an optionally substituted alkyl group or an optionally substituted aryl group, said process comprising reacting a compound of formula (III) ##STR2## with H.sub.2 NNH.sub.2 to obtain the compound of formula (I). The compound of formula (III) can be obtained by reacting a ketone of the formula R-CO-CH.sub.3 with DMF--acetal (HC(OCH.sub.3).sub.2 N(CH.sub.3).sub.2) followed by subsequent reaction with NH.sub.2 OH.sup..cndot. HCl.
一种制备式(I)的5-
氨基-3-取代
吡唑的过程,其中R为可选取代的烷基或可选取代的芳基,该过程包括将式(III)的化合物与H.sub.2 NNH.sub.2反应以获得式(I)的化合物。式(III)的化合物可通过将R-CO-CH.sub.3的酮与
DMF-
缩醛(HC(OCH.sub.3).sub.2 N(CH.sub.3).sub.2)反应,然后随后与NH.sub.2 OH.sup..cndot. HCl反应来获得。