申请人:The Upjohn Company
公开号:US04016165A1
公开(公告)日:1977-04-05
Compounds of formula IV: ##STR1## wherein R and R.sub.1 are hydrogen or alkyl of 1 to 3 carbon atoms, inclusive; wherein R.sub.2 is hydrogen or methyl; wherein R.sub.3 is hydrogen, fluoro, chloro, bromo, trifluoromethyl or nitro; and wherein Ar is phenyl, o-chlorophenyl, o-fluorophenyl, 2,6-difluorophenyl or 2-pyridyl, are produced by reacting a hydrazino compound of the formula I ##STR2## wherein R.sub.2, R.sub.3, and Ar are defined as above, with a carbonyl reagent of the formula II: ##STR3## wherein R and R.sub.1 are defined as above and Y is chloro, bromo, iodo or --O--SO.sub.2 --R.sub.4 in which R.sub.4 is alkyl, defined as above, phenyl, or tolyl, to give the compound III: ##STR4## wherein R, R.sub.1, R.sub.2, R.sub.3, Ar, and Y are defined as above and heating compound III, in an inert organic solvent, to give compound IV above. The compounds of formula IV of this invention and the pharmacologically acceptable acid addition salts thereof are sedatives, tranquilizers and muscle-relaxants and can be used for such purposes in mammals and birds.
根据上述描述,公式IV的化合物如下所示:其中R和R.sub.1为氢或1至3个碳原子的烷基;其中R.sub.2为氢或甲基;其中R.sub.3为氢、氟、氯、溴、三氟甲基或硝基;Ar为苯基、邻氯苯基、邻氟苯基、2,6-二氟苯基或2-吡啶基,通过将公式I的肼基化合物与公式II的羰基试剂反应而制备:其中R.sub.2、R.sub.3和Ar如上所述,公式II的羰基试剂如下:其中R和R.sub.1如上所述,Y为氯、溴、碘或--O--SO.sub.2 --R.sub.4,其中R.sub.4为烷基、苯基或甲苯基,得到化合物III:其中R、R.sub.1、R.sub.2、R.sub.3、Ar和Y如上所述,将化合物III在惰性有机溶剂中加热,得到上述的化合物IV。本发明的公式IV的化合物及其药理学可接受的酸盐为镇静剂、安定剂和肌肉松弛剂,可用于哺乳动物和鸟类。