Invention Grant
- Patent Title: Continuous preparation of an optically active carbonyl compound by asymmetric hydrogenation
-
Application No.: US17274142Application Date: 2019-09-03
-
Publication No.: US11242306B2Publication Date: 2022-02-08
- Inventor: Peter Zehner , Oliver Bey
- Applicant: BASF SE
- Applicant Address: DE Ludwigshafen am Rhein
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE Ludwigshafen am Rhein
- Agency: Faegre Drinker Biddle & Reath LLP
- Priority: EP18192756 20180905
- International Application: PCT/EP2019/073456 WO 20190903
- International Announcement: WO2020/048975 WO 20200312
- Main IPC: C07C45/62
- IPC: C07C45/62 ; C07C29/00 ; B01J19/00 ; B01J19/18 ; B01J31/24 ; C07C29/17 ; C07C31/04 ; C07C33/14 ; C07C47/21

Abstract:
Process for the continuous production of an optically active carbonyl compound by asymmetric hydrogenation of a prochiral α,β-unsaturated carbonyl compound with hydrogen in the presence of a homogeneous rhodium catalyst that has at least one chiral ligand, wherein a liquid reaction mixture comprising the prochiral α,β-unsaturated carbonyl compound is subjected in a first, backmixed reactor to a gas/liquid two-phase hydrogenation, and the liquid reaction mixture is then further hydrogenated in a second reactor, wherein the prochiral α,β-unsaturated carbonyl compound is employed in the first reactor in a concentration from 3% to 20% by weight. The process allows a high total conversion to the prochiral α,β-unsaturated carbonyl compound.
Public/Granted literature
- US20210214296A1 CONTINUOUS PREPARATION OF AN OPTICALLY ACTIVE CARBONYL COMPOUND BY ASYMMETRIC HYDROGENATION Public/Granted day:2021-07-15
Information query