Patent · US Expired

Polyamino acid-catalyzed process for the enantioselective epoxidation of &agr;, &bgr;-unsaturated enones and &agr;, &bgr;-unsaturated sulfones

US6822053B2 · kind B2 · utility

0Cited by

6References

22Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Thomas Geller · Odenthal, DE
Christa Kruger · Hachenburg, DE
Hans-Christian Militzer · Odenthal, DE

Key dates

Filing date	Jul 24, 2002
Grant date	Nov 23, 2004
Priority date	—
Expiry date	Feb 13, 2023

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07B2200/07
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a novel process that makes it possible to epoxidize &agr;,&bgr;-unsaturated enones or &agr;,&bgr;-unsaturated sulfones with high conversions and enantiomeric excesses in a two-phase system without addition of water in the presence of an organic solvent, a base, an oxidant, a diastereomer- and enantiomer-enriched homo-polyamino acid that has not been separately preactivated as catalyst, and a specific phase-transfer catalyst as cocatalyst.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.