Palladium Nanoparticles Immobilized on Nano-Silica Triazine Dendritic Polymer (Pd<sub><i>np</i></sub>-nSTDP): An Efficient and Reusable Catalyst for Suzuki-Miyaura Cross-Coupling and Heck Reactions
作者:Amir Landarani Isfahani、Iraj Mohammadpoor-Baltork、Valiollah Mirkhani、Ahmad R. Khosropour、Majid Moghadam、Shahram Tangestaninejad、Reza Kia
DOI:10.1002/adsc.201200707
日期:2013.3.25
Suzuki–Miyaura cross‐coupling of aryl iodides, bromides and chlorides with arylboronic acids and also in the Heck reaction of these aryl halides with styrenes. These reactions were best performed in a dimethylformamide (DMF)/water mixture (1:3) in the presence of only 0.006 mol% and 0.01 mol% of the catalyst, respectively, under conventional conditions and microwaveirradiation to afford the desired coupling
Atom-efficient synthesis of 2,4,6-trisubstituted 1,3,5-triazines <i>via</i> Fe-catalyzed cyclization of aldehydes with NH<sub>4</sub>I as the sole nitrogen source
作者:Jiang Xiao、Shuang Ren、Qiang Liu
DOI:10.1039/d0ra03323e
日期:——
An atom-efficient, straightforward method for the synthesis of 2,4,6-triaryl-1,3,5-triazines via iron-catalyzed cyclization of aldehydes with NH4I as the sole nitrogen source is demonstrated. This strategy works smoothly under air atmosphere, and affords symmetrical 2,4,6-trisubstituted and unsymmetrical 1,3,5-triazines with yields from 18% to 72%. Compared to other methods, the present protocol provides
Process for Hair Dyeing Comprising Application of Composite Pigment
申请人:Cremer Christian
公开号:US20090217465A1
公开(公告)日:2009-09-03
Disclosed is a process for dyeing of keratin-containing fibers comprising treating the fibers with at least one functionalized particle comprising on the surface an organic chromophore which is bound via a bridge member, wherein the particles are based on SiO
2
, Al
2
O
3
or mixtures thereof, and the functionalized particles carry a positive charge.
Yellow cationic dyes for dyeing of organic material
申请人:Eliu Paul Victor
公开号:US20050000034A1
公开(公告)日:2005-01-06
The present invention relates to novel cationic yellow dyes of formula (1) wherein R
1
and R
2
are each independently of the other a C
1
-C
8
alkyl radical or an unsubstituted or substituted benzyl radical, R
3
is hydrogen, C
1
-C
8
alkyl, C
1
-C
8
alkoxy, cyanide or halide, preferably hydrogen and X is an anion, with the proviso that at least one of the substitutents R
1
is a benzyl radical and R
2
is a methyl radical, R
2
is not hydrogen, also to compositions therof, especially comprising other dyes, to processes for the preparation therof and to the use therof in the dyeing of organic material, such as keratin, wool, leather, silk, cellulose or polyamides, especially keratin-containging fibres, cotton or nylon, and preferably human hair.