Preparation of organosilicon compounds containing &agr;, &bgr;-unsaturated carboxylic acids
申请人:Consortium fur Elektrochemische Industrie GmbH
公开号:US06486338B1
公开(公告)日:2002-11-26
Organosilicon compounds (P) containing &agr;,&bgr;-unsaturated carboxylic acid radicals, of the general formula (1)
—A—O—C(O)—CR═CH2 (1),
are prepared by a process in which, in a first step, organosilicon compounds (H) containing hydrogen atoms bonded directly to silicon are reacted with olefinically unsaturated compounds (U) containing a terminal double or triple bond, of the general formula (2)
&OHgr;—O—C(O)—CRH—CH2—Z (2),
in the presence of metals or compounds from the platinum group as catalyst, to give organosilicon compounds (E) containing radicals of the general formula (3)
—A—O—C(O)—CRH—CH2—Z (3),
and, in a second step, H—Z compounds are eliminated from organosilicon compounds (E), where
A is a divalent organic radical,
&OHgr; is a monovalent organic radical containing a terminal double or triple bond,
R is an H atom or a methyl radical, and
Z is Cl, I, Br or 4-methyltoluenesulfonyl.
含有α,β-不饱和羧酸基的有机硅化合物(P),通式为(1)-A-O-C(O)-CRH-CH2(1),通过以下过程制备:在第一步中,含有直接键合硅原子的氢基有机硅化合物(H)与含有端部双重或三重键的烯烃化合物(U)反应,通式为(2)-OH- O-C(O)-CRH-CH2-Z(2),在铂族金属或化合物的催化下,生成含有通式(3)-A-O-C(O)-CRH-CH2-Z基团的有机硅化合物(E);在第二步中,从有机硅化合物(E)中消除H-Z化合物,其中A是二价有机基团,OH是含有端部双重或三重键的单价有机基团,R是氢原子或甲基基团,Z是Cl,I,Br或4-甲基苯甲磺酰基。