申请人:Rutgerswerke Aktiengesellschaft
公开号:US04567272A1
公开(公告)日:1986-01-28
New 2-aminonitropyridine derivatives are disclosed of the formula: ##STR1## wherein the nitro group is in the 3- or 5-position and X represents hydrogen, an alkoxy group with 1 to 3 C atoms or an unsubstituted or alkyl- or hydroxyalkyl substituted amino group, the alkyl portion of which has 1 to 3 C atoms R.sub.1 and R.sub.2 may be the same or different and represent hydrogen, divalent alkyl- with 1 to 3 C atoms, divalent cyclopropyl- or divalent alkenyl with 1 to 3 C atoms, phenylene- or divalent pyrrol and Y and Z may be the same or different and represent hydrogen, hydroxyl- or amino group of the formula II: ##STR2## wherein R.sub.3 and R.sub.4 may be the same or different and represent hydrogen, an unsubstituted alkyl or alkyl with 1 to 3 C atoms, substituted at any position by hydroxy or amino with 1 to 3 C atoms, with the proviso that whenever X represents hydrogen, then R.sub.1 and R.sub.2 cannot both be hydrogen, and R.sub.1 is not hydrogen, R.sub.2 is not divalent alkyl-, pheneylene-, divalent cycloalkyl- or divalent heterocyclic group and R.sub.3 and R.sub.4 do not both signify hydrogen. The compounds are produced by conversion of halogen-, alkoxy- or sulfonic acid substituted nitropyridines with the corresponding amines. These compounds are pharmaceutical intermediates and nontoxic coupler components in oxidation hair dyes.
新的2-氨基硝基吡啶衍生物的化学式为:其中,硝基基团位于3-或5-位置,X代表氢、含有1至3个碳原子的烷氧基团或未取代或烷基或羟基烷基取代的氨基团,其烷基部分含有1至3个碳原子。R.sub.1和R.sub.2可以相同也可以不同,代表氢、含有1至3个碳原子的双价烷基、双价环丙基或双价烯基、苯基或双价吡咯基,Y和Z可以相同也可以不同,代表氢、羟基或化学式II的氨基团:其中R.sub.3和R.sub.4可以相同也可以不同,代表氢、未取代的烷基或含有1至3个碳原子的烷基,在任何位置被羟基或含有1至3个碳原子的氨基取代。这些化合物由卤代、烷氧基或磺酸取代的硝基吡啶与相应的胺转化而成。这些化合物是制药中间体和氧化染发剂中无毒的偶联组分。