申请人:The University of Sheffield
公开号:US20030195366A1
公开(公告)日:2003-10-16
A process for the epoxidation of an alkene, which process comprises reaction of an alkene with an oxidising agent in the presence of a catalyst, characterised in that the catalyst is an amine of formula (I), wherein T represents hydrogen or a moiety of formula (a); R
1
, R
2
, R
3
, R
4
, R
5
and R
6
each independently represents hydrogen, optionally substituted alkyl, an optionally substituted aryl group, heterocyclyl or an optionally substituted aralkyl group wherein substituents for the above mentioned groups are selected from up to three of alkyl, aryl, heterocycyl, hydroxy, alkoxy or a group NR
s
R
t
wherein R
5
and R
t
each independently represents hydrogen, alkyl or alkylcarbonyl and R
7
represents hydrogen, alkyl, aryl or aralkyl; or T represents a moiety (a) wherein R
1
together with R
2
represents an optionally substituted alkylene chain comprising 2 to 6 carbon atoms the alkylene chain being optionally interrupted with an oxygen atom or a group NR
p
wherein R
p
is hydrogen or alkyl, and wherein optional substituents for any carbon atom of the alkylene chain are selected from hydroxy, alkoxy, oxo or a group NR
s
R
t
wherein R
s
and R
t
each independently represents hydrogen, alkyl or alkylcarbonyl or substituents on any two adjacent carbon atoms of the chain together with the carbon atoms to which they are attached form an alicyclic, aryl or heterocyclic ring; and R
3
, R
4
, R
5
, R
6
and R
7
are as defined above.
1
一种烯烃环氧化的方法,该方法包括在催化剂存在下,将烯烃与氧化剂反应,其特征在于所述催化剂是具有式(I)的胺,其中T代表氢或式(a)的基团;R1、R2、R3、R4、R5和R6各自独立地代表氢、可选择取代的烷基、可选择取代的芳基、杂环烷基或可选择取代的芳基烷基,上述基团的取代基可从烷基、芳基、杂环烷基、羟基、烷氧基或基团NRsRt中选择,其中R5和Rt各自独立地代表氢、烷基或烷基羰基,R7代表氢、烷基、芳基或芳基烷基;或T代表式(a)的基团,其中R1与R2一起代表一个可选择取代的含有2至6个碳原子的烷基链,该烷基链可选择地被氧原子或基团NRp(其中Rp为氢或烷基)中断,对于烷基链的任何碳原子的可选择取代基包括羟基、烷氧基、羰基或基团NRsRt,其中Rs和Rt各自独立地代表氢、烷基或烷基羰基,或链上任意两个相邻碳原子的取代基与它们连接的碳原子一起形成脂环、芳环或杂环的环;R3、R4、R5、R6和R7如上所定义。