The present disclosure relates to a method of epoxidizing an olefin to form an epoxide, the method comprising contacting an alkene
(C≦12)
or aralkene
(C≦12)
with a titanium silica catalyst, a peroxide, a buffer, and one or more organic solvents in a reaction mixture, wherein the one or more organic solvents comprise a first organic solvent selected from:
R
1
—OH (I),
R
2
—CN (II),
R
3
—C(O)—R
4
(III) or
R
5
—O—R
6
(IV)
wherein:
R
1
is alkyl
(C≦12)
, aryl
(C≦12)
, aralkyl
(C≦12)
or a substituted version of any of these groups;
R
2
is alkyl
(C≦12)
, aryl
(C≦12)
, aralkyl
(C≦12)
or a substituted version of any of these groups;
R
3
is hydrogen, alkyl
(C≦6)
or substituted alkyl
(C≦6)
; and
R
4
, R
5
, and R
6
are each independently selected from alkyl
(C≦12)
, aryl
(C≦12)
, aralkyl
(C≦12)
or a substituted version of any of these groups, or are taken together are alkoxydiyl
(C≦12)
, alkanediyl
(C≦12)
, substituted alkoxydiyl
(C≦12)
or substituted alkanediyl
(C≦12)
.
本公开涉及一种环氧化烯烃形成
环氧化物的方法,该方法包括将烯烃(C≦12)或芳基烯烃(C≦12)与
钛硅催化剂、过氧化物、缓冲剂和一个或多个有机溶剂接触于反应混合物中,其中一个或多个有机溶剂包括从以下第一有机溶剂中选择的:R1—OH (I)、R2—CN (II)、R3—C(O)—R4(III)或R5—O—R6(IV),其中:R1为烷基(C≦12)、芳基(C≦12)、芳基烷基(C≦12)或这些基团的取代版本;R2为烷基(C≦12)、芳基(C≦12)、芳基烷基(C≦12)或这些基团的取代版本;R3为氢、烷基(C≦6)或取代烷基(C≦6);且R4、R5和R6各自独立地选择自烷基(C≦12)、芳基(C≦12)、芳基烷基(C≦12)或这些基团的取代版本,或者一起选自烷氧基二基(C≦12)、烷基二基(C≦12)、取代烷氧基二基(C≦12)或取代烷基二基(C≦12)。