发明授权
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
- 专利标题: Process for asymmetric intramolecular [3+2] cyclo-addition of hydrazones
- 专利标题(中): 腙的不对称分子内[3 + 2]环加成方法
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申请号: US10507309申请日: 2003-03-11
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公开(公告)号: US07351831B2公开(公告)日: 2008-04-01
- 发明人: Shu Kobayashi , Yasuhiro Yamashita , Haruro Ishitani
- 申请人: Shu Kobayashi , Yasuhiro Yamashita , Haruro Ishitani
- 申请人地址: JP Saitama
- 专利权人: Japan Science and Technology Agency
- 当前专利权人: Japan Science and Technology Agency
- 当前专利权人地址: JP Saitama
- 代理机构: Wenderoth, Lind Ponack, L.L.P.
- 优先权: JP2002-066161 20020311
- 国际申请: PCT/JP03/02862 WO 20030311
- 国际公布: WO03/076410 WO 20030918
- 主分类号: C07D471/04
- IPC分类号: C07D471/04
摘要:
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).
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