By alkylation of the pyrazole derivatives obtained from disubstituted cyano-acetic acid esters and hydrazine (formula 1) a series of 1-alkyl-3-amino-4,4-disubstituted-5-oxo-pyrazolines (7) was obtained. These were further alkylated to 1,2-dialkyl derivatives (8). From the compounds 1 the 5-halogenated iminopyrazolines 9 were obtained with POCl3 or PBr5. The 4-methyl-4-n-butyl-5-bromo derivative of
通过对由二取代的
氰基
乙酸酯和
肼获得的
吡唑衍
生物进行烷基化(式1),获得了一系列的1-烷基-3-
氨基-4,4-二取代的5-氧代-
吡唑啉(7)。将它们进一步烷基化为1,2-二烷基衍
生物(8)。从化合物1获得带有POCl 3或PBr 5的5-卤代亚
氨基
吡唑啉9。该系列的4-甲基-4-正丁基-5-
溴衍
生物具有重要的镇静作用。与Pd / H 2催化脱卤得到3-亚
氨基-4,4-二烷基
吡唑啉10。研究了不同类型化合物的酰化作用。