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 Y
1
and Y
2
are each identical or different and denote a hydrogen atom or a halogen atom, and at least one of Y
1
and Y
2
denotes a halogen atom).
通过混合由下式 (I) 所代表的烷
氧化锆,在不对称催化剂体系存在下,使腙衍
生物发生反应,从而在温和条件下进行腙的分子内 [3+2] 环加成反应,该反应具有较高的立体选择性和收率:
Zr(OR)
4
(I)
(其中 R 为可带有取代基的烃基)与下式 (II) 所代表的联
萘二
酚衍
生物混合:
(其中 Y
1
和 Y
2
各自相同或不同,并表示氢原子或卤素原子,且至少有一个 Y
1
和 Y
2
表示卤素原子)。