A telescoping synthesis of 5-amino-4-nitroso-1-alkyl-1H-pyrazole salt derivatives of formula (I), the compound (I) itself, and its use as an intermediate in the fabrication of 1-alkyl-4,5-diaminopyrazole salts of general formula (IX). The compounds of formula (IX) can be used as precursor dyes in oxidative hair dye compositions.
R is a mono- or poly-substituted or unsubstituted, straight or branched, saturated or mono- or poly-unsaturated, alkyl group. HZ and HZ′ are organic or mineral acids.
公式(I)的5-
氨基-4-亚硝基-1-烷基-1H-
吡唑盐衍
生物的伸缩合成,化合物(I)本身,以及其作为1-烷基-4,5-
二氨基吡唑盐的中间体在制备中的用途,其通式为(IX)。通式(IX)的化合物可用作氧化性染发剂组合物中的前体
染料。R是单取代或多取代或未取代的直链或支链、饱和或单取代或多不饱和的烷基基团。HZ和HZ′是有机或
无机酸。