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.
式(I)的 5-
氨基-4-亚硝基-1-烷基-1H-
吡唑盐衍
生物的伸缩合成法、化合物(I)本身及其在制造通式(IX)的 1-烷基-4,5-
二氨基吡唑盐时作为中间体的用途。式(IX)化合物可用作氧化染发组合物中的前体
染料。
R 是单个或多个取代或未取代的、直链或支链、饱和或单个或多个不饱和烷基。HZ 和 HZ' 是有机酸或矿物酸。