描述了一种方便的合成可磁回收钯纳米颗粒(Fe 3 O 4 -Pd)的方法。Fe 3 O 4 -Pd纳米颗粒的催化应用首次在酰胺和烯烃之间的氧化偶联中得到了探索。对甲苯磺酸在氧化酰胺化反应中起着重要作用。反应在室温下进行,在没有助催化剂和配体的情况下,在环境空气中生成(Z)酰胺。Fe 3 O 4的超顺磁性‐Pd有助于轻松,定量地从反应混合物中回收催化剂,并且可以重复使用多达三个连续周期,但催化活性会略有下降。
Oxidative Amidation of Activated Alkenes Using Pd(OAc)2 as a Catalyst Precursor
作者:Xinzhu Liu、King Kuok Mimi Hii
DOI:10.1002/ejoc.201000384
日期:2010.9
A new "chloride-free" protocol was developed for oxidativeamidation reactions between cyclic and acyclic amides and carbamates with activated olefins, conducted under Pd/Cu catalysis, using air as a terminal oxidant. The presence of TsOH is important for catalytic activity. The scope of the reaction includes the addition of primary amides, carbamates, as well as cyclic oxazolidinone and pyrrolidinone