Invention Grant
- Patent Title: Recovery and recycling of chiral tartaric acid resolving agents
- Patent Title (中): 手性酒石酸分解剂的回收和再循环
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Application No.: US10495359Application Date: 2002-11-08
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Publication No.: US07838700B2Publication Date: 2010-11-23
- Inventor: Steve Martin , Daniele Piergentili
- Applicant: Steve Martin , Daniele Piergentili
- Applicant Address: GB Cramlington
- Assignee: Aesica Pharmaceuticals
- Current Assignee: Aesica Pharmaceuticals
- Current Assignee Address: GB Cramlington
- Agency: Novak Druce + Quigg LLP
- Priority: GB0127346.5 20011114
- International Application: PCT/EP02/12494 WO 20021108
- International Announcement: WO03/042132 WO 20030522
- Main IPC: C07B57/00
- IPC: C07B57/00 ; C07C51/00
Abstract:
A process for the recovery of substituted tartaric acid resolving agents from resolution process liquors comprising organic solvents, wherein the substituted tartaric acid derivatives are neutralised by adding a base, extracted into an aqueous phase and crystallized from the aqueous phase by addition of a mineral acid in the presence of an organic solvent.
Public/Granted literature
- US20050085665A1 Recovery and recycling of chiral tartaric acid resolving agents Public/Granted day:2005-04-21
Information query
