Abstract:
A process is claimed for the enantioselective epoxidation of α,β-unsaturated ketones, in which a compound of the general formula I, is reacted with an oxidizing agent to form α,β-epoxy ketones of the general formula II, in which R1, R2, R3 are as defined above. The α,β-epoxy ketones of the general formula II can be obtained in good yields and outstanding enantioselectivities from α,β-unsaturated ketones of the general formula I by epoxidation with hydrogen peroxide in the presence of a chiral catalyst, such as amino compounds and their acid addition salts.
Abstract:
A process is claimed for the enantioselective epoxidation of α,β-unsaturated ketones, in which a compound of the general formula I, is reacted with an oxidizing agent to form α,β-epoxy ketones of the general formula II, in which R1, R2, R3 are as defined above. The α,β-epoxy ketones of the general formula II can be obtained in good yields and outstanding enantioselectivities from α,β-unsaturated ketones of the general formula I by epoxidation with hydrogen peroxide in the presence of a chiral catalyst, such as amino compounds and their acid addition salts.
Abstract:
The invention relates to a method for producing chiral organic compounds by asymmetric catalysis, using ionic catalysts comprising a chiral catalyst anion. The claimed method is suitable for reactions which are carried out over cationic intermediate stages, such as iminium ions or acyl pyridinium ions. The invention enables the production of chiral compounds with high ee values, that until now could only be obtained by means of costly purification methods.
Abstract:
Disclosed is a composition comprising, consisting essentially of, or consisting of an ethylene polymer, a thermoplastic elastomer, a crosslinking agent, and optionally a foaming agent wherein the ethylene polymer includes ethylene vinyl acetate copolymer, polyethylene, ethylene acid copolymer, ionomer of the acid copolymer, ethylene alkyl(meth)acrylate copolymer, or combinations of two or more thereof; the thermoplastic elastomer can include copolyetherester, copolyetheramide, elastomeric polyolefin, styrene diene block copolymers, thermoplastic polyurethane, or combinations of two or more thereof; and the crosslinking agent includes one or more organic peroxides, irradiation, or combinations thereof. Also disclosed is a product made from the composition such as foam for shoe applications.