Polyhalogen-substituted cinnamic acids and cinnamic acid derivatives and a process for the preparation of polyhalogen-substituted cinnamic acids and cinnamic acid derivatives
申请人:——
公开号:US20020115885A1
公开(公告)日:2002-08-22
Polyhalogenated cinnamic acids and cinnamic acid derivatives are prepared by reacting diazonium salts accessible from polyhalogenated anilines with acrylic acid or acrylic acid derivatives in the presence of a homogeneous, palladium-containing catalyst at about −5 to about +100° C. Some of the cinnamic acids and cinnamic acid derivatives obtainable in this way are new. Cinnamic acids and cinnamic acid derivatives which can be prepared according to the invention can be used for the preparation of indanones which are precursors for agro- and pharmaceutical chemicals and for substances having liquid-crystalline properties.
聚卤代肉桂酸和肉桂酸衍生物是通过在均相、含钯催化剂存在的条件下,将从多卤代苯胺中可获得的重氮盐与丙烯酸或丙烯酸衍生物反应制备的,反应温度在-5到+100°C左右。通过这种方式获得的一些肉桂酸和肉桂酸衍生物是新的。根据该发明可制备的肉桂酸和肉桂酸衍生物可用于制备印丹酮,印丹酮是农药和药用化学品的前体,也可用于具有液晶性质的物质的制备。