Invention Grant
- Patent Title: C2-symmetrical ruthenocene diphosphine ligands only with surface chirality and their manufacture
- Patent Title (中): C2对称的二茂铁二膦配体仅具有表面手性及其制造
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Application No.: US12303767Application Date: 2007-06-08
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Publication No.: US08507705B2Publication Date: 2013-08-13
- Inventor: Wanbin Zhang , Fang Xie , Delong Liu , Li Luo , Genghong Hua , Jian Shang
- Applicant: Wanbin Zhang , Fang Xie , Delong Liu , Li Luo , Genghong Hua , Jian Shang
- Applicant Address: CN Shanghai
- Assignee: Shanghai Jiaotong University
- Current Assignee: Shanghai Jiaotong University
- Current Assignee Address: CN Shanghai
- Agency: Westerman, Hattori, Daniels & Adrian, LLP
- Priority: CN200610027408 20060608; CN200610027409 20060608
- International Application: PCT/CN2007/001824 WO 20070608
- International Announcement: WO2007/140717 WO 20071213
- Main IPC: C07F15/00
- IPC: C07F15/00

Abstract:
The invention affords C2-symmetrical ruthenocene diphosphine ligands with surface chirality and their manufacture. The present invention uses (S)-(S)-1,1′-2(diphenylphosphino)-2,2′-2[(S)-4-isopropyloxazolinyl] ruthenocene as raw material and the product is prepared through two or three steps of reaction. At the action of trifluoroacetic acid, (S)-(S)-1,1′-2(diphenylphosphino)-2,2′-2[(S)-4-isopropyloxazolinyl] ruthenocene first removes oxazoline and gets ester amides compound which then carries out ester exchange or reduction alkylation and gets the product of ruthenocene diphosphine ligand with surface chirality. The ligands prepared with the structure as follows from the invention can be used in all kinds of metallic catalysis asymmetric reaction and has good reaction activity and stereoselectivity, wherein R is methyl or ethyl, R1 is linear or branched alkyl, cycloalkyl, alkoxy, aryl, aralkyl and alkyl amino.
Public/Granted literature
- US20110160474A1 C2-SYMMETRICAL RUTHENOCENE DIPHOSPHINE LIGANDS ONLY WITH SURFACE CHIRALITY AND THEIR MANUFACTURE Public/Granted day:2011-06-30
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