Recyclable Poly-Zn<sub>3</sub>(OAc)<sub>4</sub>-3,3′-Bis(aminoimino)binaphthoxide Catalyst for Asymmetric Iodolactonization
作者:Takayoshi Arai、Takahiro Kojima、Ohji Watanabe、Tsutomu Itoh、Hirofumi Kanoh
DOI:10.1002/cctc.201500842
日期:2015.10
unimolecular Zn3(OAc)4–3,3′‐bis(aminoimino)binaphthoxide complex, a poly‐Zn3(OAc)4–3,3′‐bis(aminoimino)binaphthoxide (poly‐Zn) complex was prepared from 3,3′‐diformylbinaphthol, tetramine, and Zn(OAc)2. The first‐generation poly‐Zn catalyst (poly‐Zn1) was prepared from poly(aminoiminobinaphthol) and Zn(OAc)2. Although poly‐Zn1 showed high catalytic activity for iodolactonization, the catalyst could not be
根据单分子Zn 3(OAc)4 –3,3'-双(氨基亚氨基)联萘酚配合物的结构,聚Zn 3(OAc)4 –3,3'-双(氨基亚氨基)联萘氧化物(聚-锌)配合物从3,3'- diformylbinaphthol,四胺制备,和Zn(OAc)2。第一代聚锌催化剂(poly- Zn1)是由聚(氨基亚氨基二酚)和Zn(OAc)2制备的。尽管聚Zn1对碘化内酯显示出高催化活性,但该催化剂无法重复使用。第二代聚锌催化剂(poly- Zn2)是通过3,3'-二甲酰基联萘,四胺和Zn(OAc)2的自组织制备的。这产生了稳定且活性高的用于不对称碘代内酯化的聚Zn2催化剂,该催化剂可重复使用五个周期。