KINETICS AND MECHANISM OF CYCLIZATION OF OMEGA-SUBSTITUTED PYRAZOLYLHYDRAZONE-OMEGA-CARBONITRILES

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作者：
ABDELKHALEK, AA
机构：
来源：
INDIAN JOURNAL OF CHEMISTRY SECTION B-ORGANIC CHEMISTRY INCLUDING MEDICINAL CHEMISTRY | 1994年 / 33卷 / 02期
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O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
The kinetics of cyclization of omega-substituted pyrazolylhydrazone-omega-carbonitriles (PHC), to give the pyrazolo[4,3-c]pyridazines (PP) on treatment with alcoholic hydrochloric acid, have been studied. Over the [HCl] range 0.08-0.70 M, the kinetics obey the rate law: d[PP]/dt = k(2) [PHC] [HCl] The kinetics have Iso been investigated in various solvents and an appropriate mechanism has been suggested. The activated thermodynamic parameters are reported.
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页码：186 / 188
页数：3
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