申请人:Sandoz Ltd.
公开号:US04477448A1
公开(公告)日:1984-10-16
Novel compounds of formula I, ##STR1## in which R.sub.1 is hydrogen, alkyl, phenylalkyl, carbalkoxyalkyl, acyl, carboxyalkyl, alkoxyalkyl, hydroxyalkyl, cyanoalkyl, or carbamoylalkyl, R.sub.2 is hydrogen, pivaloyloxymethyl or the residue of an easily splittable ester grouping, R.sub.3 is a pyrazolyl radical, unsubstituted or mono- or di-substituted by alkyl, phenyl, alkoxy, alkylthio, carboxy, carboxyalkyl, carbamoyl, carbamoylalkyl, alkylsulphonyl, azido, acylamino, hydrazino, acylhydrazino alkylidenehydrazino, phenylidenehydrazino, in which the phenyl nucleus is unsubstituted or substituted by NH.sub.2, lower alkoxy or lower alkyl, furylidenehydrazino, carbalkoxy or a group R.sub.5 R.sub.6 N--, in which R.sub.5 and R.sub.6 are the same or different and are hydrogen or alkyl, provided that the nitrogen atoms and the 4-position of the pyrazole nucleus are either unsubstituted or substituted by alkyl, phenyl, or carbalkoxy, and R.sub.4 is hydrogen, acetoxy, carbamoyloxy or --S--Rh, in which Rh is a heterocyclic radical.
式I的新化合物,##STR1## 其中R1是氢、烷基、苯基烷基、羰基烷氧基烷基、酰基、羧基烷基、烷氧基烷基、羟基烷基、氰基烷基或氨基甲酰烷基,R2是氢、新戊酰氧甲基或易分解酯基团残基,R3是吡唑基团,未取代或单取代或双取代,取代基为烷基、苯基、烷氧基、烷硫基、羧基、羧基烷基、氨基甲酰基、氨基甲酰烷基、烷基磺酰基、叠氮基、酰氨基、肼基、酰肼基、亚烷基肼基、亚苯基肼基,其中苯环未取代或被氨基、低级烷氧基或低级烷基取代,呋喃亚基肼基、羰基烷氧基或R5R6N--基团,其中R5和R6相同或不同,为氢或烷基,条件是吡唑环的氮原子和4位未取代或被烷基、苯基或羰基烷氧基取代,R4是氢、乙酰氧基、氨基甲酰氧基或--S--Rh,其中Rh是杂环基团。