Agent and method for oxidative coloring of keratin fibers
申请人:Pasquier Cecile
公开号:US20070067927A1
公开(公告)日:2007-03-29
The object of the present invention is a ready-to-use agent for coloring keratin fibers containing (i) at least one heterocyclic hydrazone derivative of formula (I), (ii) at least one aromatic enamine of formula (IIa) or an acid addition compound thereof (IIb) and (iii) at least one oxidant, a multicomponent kit and a method for coloring keratin fibers by use of said agent.
Agent and method for the oxidative coloring of keratin fibers
申请人:Pasquier Cecile
公开号:US20070079452A1
公开(公告)日:2007-04-12
The object of the present invention is a ready-to-use agent for coloring keratin fibers containing (i) at least one heterocyclic hydrazone derivative of formula (I), (ii) at least one CH-active compound of formulas (II) to (IX) and (iii) at least one oxidant, a multicomponent kit and a method for coloring keratin fibers by use of said agent.
Metal-free C(sp<sup>2</sup>)–H functionalization of azoles: K<sub>2</sub>CO<sub>3</sub>/I<sub>2</sub>-mediated oxidation, imination, and amination
作者:Ranajit Das、Mainak Banerjee、Rakesh Kumar Rai、Ramesh Karri、Gouriprasanna Roy
DOI:10.1039/c8ob00535d
日期:——
available simple K2CO3/I2 reagent combination. The iodinated azole adduct, produced via the in situ generation of N-heterocyclic carbene, is the key intermediate for C2−H oxidation, imination, and amination of azoles. Significantly, these reactions proceed under mild conditions with high to excellent yields, are scalable to large quantity and exhibit a broad substrate scope. Interestingly, this direct
通过使用可商购的简单K 2 CO 3 / I 2试剂组合,可以实现多种唑类的直接C2-H氧化和亚胺化。碘化唑加成物,产生通过所述原位生成N-杂环碳烯的,为C2-H氧化,亚胺化,和唑类的胺化的关键中间体。重要的是,这些反应在温和的条件下以高至优异的产率进行,可扩展至大量并显示出广泛的底物范围。有趣的是,这种直接的C2-H胺化方法使我们能够获得各种具有药理活性的N 6-烷基或N 6芳基取代的苯并咪唑并喹唑啉酮骨架通过分子内CH串联进行一锅反应。
Synthesis of 2-(ethylsulfanyl)aniline derivatives through the unexpected ring opening of N-substituted-2(3H)-benzothiazolones
decarbalkoxylations of disubstituted geminal diesters by water–DMSO with added salts (KCN or NaCN) is a convenient preparative route leading to the corresponding monoesters. Herein, we described an efficient and very simple methodology for the preparation of 2-(ethylsulfanyl)aniline derivatives through the unexpected ringopening of the corresponding N-substituted-2(3H)-benzothiazolones in the presence of disubstituted