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US 6,833,442 B2Granted
Complex and method for producing epoxides by using the complex
AssigneeThe University of Tokyo
InventorsMasakatsu Shibasaki, Takashi Ohshima, Tetsuhiro Nemoto
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Abstract
There is provided a complex having a specified chemical structure and an asymmetric catalyst using such a complex. Further, an epoxidation of amine or ketone is enantioselectively conducted by using such an asymmetric catalyst.
Claims6
A method for producing an epoxide characterized by reacting an unsaturated amide with an oxidizing agent in the presence of an asymmetric catalyst wherein the asymmetric catalyst comprises a complex selected from the group consisting of complexes represented by general formulas (I), (II) and (III) as follows:
- and wherein X is P or As, and M is a rare earth metal selected from the group consisting of Ce, Pr, Nd, Pm, Sm, Eu, Gd, Dy, Ho, Er and Yb, and R1 is an alkoxy group or an alkyl peroxy group, and R2 is a phenyl group or an alkyl group, and each of R3 and R4 is a substituent on an aromatic ring and wherein each of R3 and R4 is independently selected from the group consisting of an alkyl group, an ether, a halogen atom, an amido group and an ester.
Dependencies are inferred from the claim text.