Invention Grant
US07351831B2 Process for asymmetric intramolecular [3+2] cyclo-addition of hydrazones
有权
腙的不对称分子内[3 + 2]环加成方法
- Patent Title: Process for asymmetric intramolecular [3+2] cyclo-addition of hydrazones
- Patent Title (中): 腙的不对称分子内[3 + 2]环加成方法
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Application No.: US10507309Application Date: 2003-03-11
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Publication No.: US07351831B2Publication Date: 2008-04-01
- Inventor: Shu Kobayashi , Yasuhiro Yamashita , Haruro Ishitani
- Applicant: Shu Kobayashi , Yasuhiro Yamashita , Haruro Ishitani
- Applicant Address: JP Saitama
- Assignee: Japan Science and Technology Agency
- Current Assignee: Japan Science and Technology Agency
- Current Assignee Address: JP Saitama
- Agency: Wenderoth, Lind Ponack, L.L.P.
- Priority: JP2002-066161 20020311
- International Application: PCT/JP03/02862 WO 20030311
- International Announcement: WO03/076410 WO 20030918
- Main IPC: C07D471/04
- IPC: C07D471/04
![Process for asymmetric intramolecular [3+2] cyclo-addition of hydrazones](/abs-image/US/2008/04/01/US07351831B2/abs.jpg.150x150.jpg)
Abstract:
An intramolecular [3+2] cycloaddition reaction of a hydrazone is carried out under a mild condition with a high stereoselectivity and yield by reacting a hydrazone derivative in the presence of an asymmetric catalyst system obtained by mixing a zirconium alkoxide represented by the following formula (I): Zr(OR)4 (I) (wherein R is a hydrocarbon group which may have a substituent) with a binaphthol derivative represented by the following formula (II): (wherein Y1 and Y2 are each identical or different and denote a hydrogen atom or a halogen atom, and at least one of Y1 and Y2 denotes a halogen atom).
Public/Granted literature
- US20050165237A1 Process for asymmetric intramolecular [3+2] cyclo-addition of hydrazones Public/Granted day:2005-07-28
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