Carbonylative Ring Expansion of Aziridines to β-Lactams with Rhodium-Complexed Dendrimers on a Resin
作者:Shui-Ming Lu、Howard Alper
DOI:10.1021/jo030353r
日期:2004.5.1
Rhodium-complexed dendrimers, supported on a resin, were evaluated as catalysts for the carbonylative ring expansion reactions of a variety of aziridines with carbon monoxide to give β-lactams. The effects of reaction temperature, solvent, time, and pressure of carbon monoxide on this transformation were also investigated. The dendritic catalysts showed comparable activity to the homogeneous analogue
负载在树脂上的铑配合物的树枝状大分子被评估为各种氮丙啶与一氧化碳羰基化扩环反应生成β-内酰胺的催化剂。还研究了反应温度,溶剂,时间和一氧化碳压力对该转化的影响。树状催化剂显示出与均相类似物相当的活性。更重要的是,该催化体系可以通过简单的过滤容易地回收并循环使用,而不会显着降低活性。