摘要 本文成功地将磷酸二苯酯肌酸固定在Fe 3 O 4纳米颗粒上,并用作5-取代四唑与α,β-不饱和羰基的氮杂-迈克尔反应的高效催化剂。通过傅立叶变换红外光谱(FT-IR),场发射扫描电子显微镜(FE-SEM),振动样品磁强计(VSM),热重分析(TGA)和X射线等各种技术对制备的纳米催化剂进行了全面分析。衍射(XRD)。该方法具有许多优点,例如后处理简单,产率高和反应时间短。 图形摘要 本文讨论了一种 通过 四氢呋喃合成取代四唑的方法 Fe 3 O 4 @磷酸二苯酯肌酸纳米颗粒作为新型催化剂的aza-Michael反应。
E-factor minimized protocols for the polystyryl-BEMP catalyzed conjugate additions of various nucleophiles to α,β-unsaturated carbonyl compounds
作者:Simona Bonollo、Daniela Lanari、Julie M. Longo、Luigi Vaccaro
DOI:10.1039/c1gc16088e
日期:——
Efficient protocols for the addition of carbon-, sulphur- and nitrogen-nucleophiles to α,β-unsaturated carbonylcompounds catalyzed by PS-BEMP have been reported. The adoption of solvent-free conditions (SolFC) was crucial for improving the efficiency of all the processes, while by using an organic reaction medium poor results were obtained. Addition reactions were performed by using equimolar amounts