[{W(O)(O
<sub>2</sub>
)
<sub>2</sub>
(H
<sub>2</sub>
O)}
<sub>2</sub>
(μ‐O)]
<sup>2–</sup>
‐Catalyzed Epoxidation of Allylic Alcohols in Water with High Selectivity and Utilization of Hydrogen Peroxide
作者:Keigo Kamata、Kazuya Yamaguchi、Shiro Hikichi、Noritaka Mizuno
DOI:10.1002/adsc.200303123
日期:2003.11
A dinuclear peroxotungstate, K2[W(O)(O2)2(H2O)}2(μ-O)]⋅2 H2O, exhibits high catalytic performance for the epoxidation of various allylic alcohols with only one equivalent of hydrogen peroxide at 305 K in water solvent. The effectiveness of this system is evidenced by high chemo-, regio-, and diastereoselectivity, and stereospecificity for the epoxidation of allylic alcohols. Furthermore, products/catalyst
双核过氧钨酸盐K 2 [W(O)(O 2)2(H 2 O)} 2(μ-O)]⋅2H 2 O表现出高催化性能,仅用一种烯丙基醇即可对各种烯丙基醇进行环氧化305 K在水溶剂中的当量过氧化氢。该系统的有效性由高的化学选择性,区域选择性和非对映选择性以及对烯丙基醇的环氧化的立体特异性证明。此外,可以通过简单的提取容易地进行产物/催化剂的分离,并且可以在维持催化性能的情况下重复使用回收的催化剂。