Development of novel recyclable homogeneous metal complex catalysts

OsO4固定在核心位置为叔氮的聚苯醚枝状大分子上，在低水平锇浸出的情况下，有效催化烯烃的均相二羟基化反应。枝晶锇催化剂适用于多种烯烃。此外，枝晶锇催化剂通过再沉淀回收，然后重复使用多达5次。此外，在树突状锇催化剂回收的情况下，二羟基化过程顺利进行，锇浸出水平低。

OsO4 immobilized on a poly(benzyl ether) dendrimer with a tertiary nitrogen at its core position efficiently catalyzed the homogeneous dihydroxylation of olefins with a low level of osmium leaching. The dendritic osmium catalyst could be applied to the wide range of olefins. Furthermore, the dendritic osmium catalyst was recovered by reprecipitation and then reused up to five times. Also, in the case of the recycling of the dendritic osmium catalyst, the dihydroxylations proceeded smoothly with low levels of osmium leaching.