Chiral salen catalyst and methods for the preparation of chiral compounds from racemic epoxides by using new catalyst
US6884750B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2002 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | Jul 25, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/847
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to new chiral salen catalysts and methods for the preparation of chiral compounds from racemic epoxides by using new catalyst. More particularly, the present invention is to provide novel chiral salen catalysts and their uses for producing chiral compounds having high optical purity to be used as raw materials for preparing chiral medicines or food additives in a large scale economically, wherein the chirl salen catalyst having a particular molecules structure can be reused continuously without any activating process of used catalysts and cause no or little racemization after the reaction is completed because it maintains its catalytic activity after the reaction process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.