Dicationic bis-hydrazone compound, dye composition comprising at least one such compound, implementation process therefor and uses thereof
申请人:David Herve
公开号:US20060096043A1
公开(公告)日:2006-05-11
The present disclosure relates to a novel family of dicationic bis-hydrazone compounds that may be used as direct dyes, and to a dye composition for dyeing keratin fibers, for example, human keratin fibers such as the hair, comprising, in a suitable dyeing medium, at least one such compound. Also disclosed are dyeing processes implementing this composition and uses thereof.
Fast dye salts provide fast access to azidoarene synthons in multi-step one-pot tandem click transformations
作者:James T. Fletcher、Jacqueline E. Reilly
DOI:10.1016/j.tetlet.2011.08.069
日期:2011.10
commercially available diazonium salts could be used as efficient aromatic azide precursors in one-pot multi-step click transformations. Seven different diazonium salts, including FastRed RC, Fast Blue B, Fast Corinth V and Variamine Blue B were surveyed under aqueous click reaction conditions of CuSO4/Na ascorbate catalyst with 1:1 t-BuOH/H2O solvent. Two-step tandem reactions with terminal alkyne
该研究检查了市售的重氮盐是否可以用作一锅多步点击转化中的有效芳香叠氮化物前体。在CuSO 4 /Na 抗坏血酸盐催化剂与1:1 t- BuOH/H 2 O 溶剂的点击反应条件下,对七种不同的重氮盐,包括固红RC、固蓝B、固克林斯V 和Variamine Blue B 进行了研究。与末端炔烃和二炔共反应物的两步串联反应产生了 1,2,3-三唑产物,产率为 66-88%,而与三甲基甲硅烷基保护的炔烃和二炔共反应物的三步串联反应产生了 1, 2,3-三唑产品的产率为 61-78%。