Chiral catalyst and heterogeneous chiral catalyst comprising the same
A chiral catalyst represented by formula (II) is provided. In formula (II), Y independently includes hydrogen, fluorine, trifluoromethyl, isopropyl, tert-butyl, C m H 2m+1 or OC m H 2m+1 , wherein m=1-10 and n=1-10. A heterogeneous chiral catalyst is also provided. The heterogeneous chiral catalyst includes the chiral catalyst represented by formula (II), and a substrate connected to the chiral catalyst.
1. A chiral catalyst, represented by formula (I):
wherein Y independently comprises hydrogen, fluorine, trifluoromethyl, isopropyl, tert-butyl, C m H 2m+1 or OC m H 2m+1 , wherein m=1-10 and n=1-10.
2. The chiral catalyst as claimed in claim 1 , wherein Y independently comprises hydrogen, CH 3 or OCH 3 , and n=3-8.
3. The chiral catalyst as claimed in claim 1 , wherein the chiral catalyst comprises:
4. A chiral catalyst, represented by formula (II):
wherein Y independently comprises hydrogen, fluorine, trifluoromethyl, isopropyl, tert-butyl, C m H 2m+1 or OC m H 2m+1 , wherein m=1-10 and n=1-10.
5. The chiral catalyst as claimed in claim 4 , wherein Y independently comprises hydrogen, CH 3 or OCH 3 , and n=3-8.
6. The chiral catalyst as claimed in claim 4 , wherein the chiral catalyst comprises:
7. A heterogeneous chiral catalyst, comprising:
a chiral catalyst as claimed in claim 4 ; and
a substrate connected to the chiral catalyst.
8. The heterogeneous chiral catalyst as claimed in claim 7 , wherein the surface of the substrate comprises hydroxyl groups.
9. The heterogeneous chiral catalyst as claimed in claim 8 , wherein the substrate comprises silicon oxide, titanium oxide, iron oxide, zinc oxide or aluminum oxide.
10. The heterogeneous chiral catalyst as claimed in claim 9 , wherein the substrate has a specific surface area which is in a range from 10 m 2 /g to 1,000 m 2 /g.
11. The heterogeneous chiral catalyst as claimed in claim 9 , wherein the substrate has a pore size which is in a range from 2 nm to 50 nm.
12. The heterogeneous chiral catalyst as claimed in claim 8 , wherein the hydroxyl group of the substrate is connected to the Si(OEt) 3 group of the chiral catalyst.
13. The heterogeneous chiral catalyst as claimed in claim 12 , wherein a silicon-oxygen bond is formed between the substrate and the chiral catalyst.