A process for producing alicyclic hydrazine derivatives, tetra-hydropyridazine and hexahydropyridazine
申请人:JAPAN HYDRAZINE CO., LTD.
公开号:EP0850930A2
公开(公告)日:1998-07-01
The present invention relates to a process for producing alicyclic hydrazine derivatives, tetrahydropyridazine and hexahydropyridazine which are useful as intermediate starting materials such as medicines and agricultural chemicals. Especially, the present invention provides;
a process for producing an alicyclic hydrazine derivative or its hydrohalogenic acid salt, which comprises reacting a hydrazine hydrohalogenic acid salt with a doil compound or an alicyclic ether compound in the presence of an excessive inorganic acid existing in a free form or in the form of an acid addition salt;
a process for producing tetrahydropyridazine from 1-aminopyrrolidine, which comprises oxidizing 1-aminopyrrolidine with an oxidizing agent to form tetrahydropyridazine; and
a process for producing hexahydropyridazine, which comprises oxidizing 1-aminopyrrolidine with an oxidizing agent, synthesizing tetrahydropyridazine, and thereafter, hydrogenating the tetrahydropyridazine in the presence of a base.
本发明涉及一种生产脂环族肼衍生物、四氢哒嗪和六氢哒嗪的工艺,这些衍生物可用作药物和农药等中间起始原料。特别是,本发明提供了
一种生产脂环族肼衍生物或其氢卤酸盐的工艺,包括在以游离形式或以酸加成盐形式存在的过量无机酸的存在下,使肼氢卤酸盐与多伊尔化合物或脂环族醚化合物反应;
一种用 1-氨基吡咯烷生产四氢哒嗪的工艺,其中包括用氧化剂氧化 1-氨基吡咯烷以形成四氢哒嗪;以及
一种生产六氢哒嗪的工艺,包括用氧化剂氧化 1-氨基吡咯烷,合成四氢哒嗪, 然后在碱存在下氢化四氢哒嗪。