5-肼基-1,3-二甲基-4-硝基-1H-吡唑 、 盐酸 、 水 在
钯氢气 作用下,
以
乙醇 为溶剂,
反应 3.0h,
以9.5 g of 4-amino-1,3-dimethyl-5-hydrazinopyrazole dihydrochloride were obtained in the form of white crystals的产率得到5-Hydrazinyl-1,3-dimethylpyrazol-4-amine;dihydrochloride
参考文献:
名称:
Composition for dyeing keratin fibers which contain at least one diaminopyrazole, dyeing process, novel diaminopyrazoles and process for their preparation
Composition for dyeing keratin fibers which contain at least one
申请人:L'Oreal
公开号:US06099592A1
公开(公告)日:2000-08-08
The invention relates to novel compositions for the oxidation dyeing of keratin fibers, comprising at least one specific diaminopyrazole derivative, to the dyeing process using this composition, to novel diaminopyrazole derivatives and to a process for their preparation.
Composition for dyeing keratin fibers which contain at least one diaminopyrazole, dyeing process, novel diaminopyrazoles and process for their preparation
申请人:L'Oreal
公开号:US20030019051A9
公开(公告)日:2003-01-30
The invention relates to novel compositions for the oxidation dyeing of keratin fibers, comprising at least one specific diaminopyrazole derivative, to the dyeing process using this composition, to novel diaminopyrazole derivatives and to a process for their preparation.