[EN] PYRIMIDINE COMPOUNDS AND PYRIMIDO INDOLE COMPOUNDS AND METHODS OF USE [FR] COMPOSÉS DE PYRIMIDINE ET COMPOSÉS DE PYRIMIDO INDOLE ET PROCÉDÉS D'UTILISATION DE CEUX-CI
尽管有机电合成受到赞赏,但后多组分反应转化化学很少利用这种强大的技术。在此,我们探索了后 Ugi 环化反应,使用 N 中心自由基介导的分子内原位环化,通过使用来自 Ugi 加合物的双酰胺的电化学生成的酰胺自由基来合成 4-咪唑啉酮的多种螺环变体。该协议的特点是在恒定电流条件下使用碳-铂电极进行不分割的电池设置。这些无金属和试剂的反应是可扩展的并且具有广泛的底物范围。
Screw sense selective polymerization of achiral isocyanides catalyzed by optically active nickel(II) complexes
作者:Paul C. J. Kamer、Roeland J. M. Nolte、Wiendelt. Drenth
DOI:10.1021/ja00228a035
日期:1988.9
screw sense. Therefore, it should be possible to obtain opticallyactive polymers by using chiral catalysts. In the present paper we describe the synthesis of opticallyactivepoly (isocyanides) by using Ni(II) complexes of opticallyactive amines as catalysts.15 The prevailing screw sense of the polymers is derived from CD R N H 2 1 R N H C H O 2 R N +
各种非手性异氰化物与该催化剂的聚合产生光学活性聚合物,其对映体过量高达 83%。在质子酸、路易斯酸或 Ni(II) 盐作为催化剂存在下,异氰化物聚合生成聚(异氰化物),也称为聚(亚氨基亚甲基)或聚(碳酰亚胺酰基)。1,2 Ni(II) 盐是多功能催化剂,在我们看来,最适合我们的实验。聚(异氰化物)是方案 I n Ni(II) ( RN = C < ) 中的不寻常聚合物 „ 其主链的每个原子都带有侧链 .1,2 这一特征导致围绕单键的旋转受限连接主链碳原子。单键周围可能有两种构象,即。R 和 S 。所得聚合物将是具有P和M螺杆的非对映异构分子的混合物。这种混合物将包含过量的一种螺旋感。在大约 20 种不同的光学活性异氰化物 0.10" 12 中观察到了这一点。在另一个过程中,我们通过特异性抑制外消旋对的一个螺旋方向的生长来制备光学活性聚合物。5,13 最后,在一种情况下,光学活性聚合物活性聚
Polymer composition
申请人:DSM N.V.
公开号:EP0538939A1
公开(公告)日:1993-04-28
The invention relates to a polymer composition based on a thermoplastic polymer and a polyaniline, characterised in that the thermoplastic polymer contains functional monomeric units and the polyaniline is grafted onto the thermoplastic polymer substantially through the reaction of the terminal NH₂ group of the polyaniline with a functional monomeric unit of the thermoplastic polymer. It has been found that the polymer composition according to the invention has good thermoplastic processability as well as good conductive properties. The polymer composition according to the invention is extremely suitable for the production of all kinds of objects.
Dispersion of electrically conductive particles in a dispersing medium
申请人:DSM N.V.
公开号:EP0589529A1
公开(公告)日:1994-03-30
The invention relates to a dispersion of electrically conductive particles, comprising a binder and an electrically conductive polymer, and a stabiliser in a dispersing medium. The dispersion according to the invention is characterised in that the particles contain a non-ionic stabiliser. It has been found that the stability of the dispersion according to the invention is very good. In addition the dispersion according to the invention is extremely suitable for providing objects with a coating in a simple manner. The applied coating has good electrically conductive properties as well as good coating properties. The applied coating is homogeneously distributed over the coated object. Moreover the applied coating appears to adhere well to the object.
Aqueous coating dispersion, process for the preparation thereof and use thereof in anticorrosive paint
申请人:DSM N.V.
公开号:EP0821040A1
公开(公告)日:1998-01-28
The invention relates to an aqueous coating dispersion comprising at least electrically conductive particles, which particles comprise at least a first binder, a conductive polymer and a non-ionic stabiliser, characterised in that the coating dispersion contains 50 to 99 wt. %, relative to the total amount of solids present, of a second binder, which second binder consists of electrically non-conductive particles. The invention also relates to a process for the preparation of the aqueous coating dispersion and to the use thereof in an anticorrosive paint, to the anticorrosive paint based on the aqueous coating dispersion according to the invention and to the metals protected herewith.
Process to make a conductive composition of a fluorinated polymer which contains polyaniline
申请人:Atofina
公开号:EP1428857A1
公开(公告)日:2004-06-16
The process of the present invention is a process to make a conductive fluorinated polymer composition (also called composite) wherein :
a) an aqueous solution of an anilinium salt is mixed with an aqueous dispersion of a fluorinated polymer,
b) then an oxidant is added to the mixture of step a) to make a blend of said fluorinated polymer and doped polyaniline (PANI),
c) by-products and unreacted aniline are removed by washing with water or an alcohol to get a blend of purified fluorinated polymer and doped PANI,
d) eventually the purified fluorinated polymer and doped PANI of step c) can be mixed with an acid,
e) water is removed from the purified fluorinated polymer and doped PANI of step c) or d) if any and the remaining powder is melted and shaped in films, pellets or any object.
本发明的工艺是一种制造导电含氟聚合物组合物(又称复合材料)的工艺,其中:
a) 将苯胺盐的水溶液与含氟聚合物的水分散液混合、
b) 然后向步骤 a) 的混合物中加入氧化剂,制成所述含氟聚合物和掺杂聚苯胺(PANI)的混合物、
c) 通过水或酒精洗涤去除副产物和未反应的苯胺,得到纯化的含氟聚合物和掺杂的 PANI 混合物、
d) 最终将步骤 c) 中纯化的含氟聚合物和掺杂的 PANI 与酸混合、
e) 除去步骤 c) 或 d) 中纯化的含氟聚合物和掺杂的 PANI(如有)中的水分,将剩余粉末熔化并制成薄膜、颗粒或任何物体。