DBU-functionalized MCM-41-coated nanosized hematite (DBU-F-MCM-41-CNSH): a new magnetically separable basic nanocatalyst for the diastereoselective one-pot four-component synthesis of 2-(<i>N</i>-carbamoylacetamide)-substituted 2,3-dihydrothiophenes
作者:Reza Kordnezhadian、Mohsen Shekouhy、Ali Khalafi-Nezhad
DOI:10.1039/c9nj04714j
日期:——
(CHN and ICP). The synthesized magnetic mesoporous nanomaterial was applied successfully as a basic nanocatalyst for the diastereoselective synthesis of 2-(N-carbamoylacetamide)-substituted 2,3-dihydrothiophenes through a one-pot four-component reaction of aryl aldehydes, primary and secondary amines, 1,3-thiazolidinedione and malononiterile in a 1 : 2 v/v mixture of EtOH/H2O at 60 °C. Using this method
制备DBU功能化的MCM-41包覆的纳米赤铁矿(DBU-F-MCM-41-CNSH)作为新型可磁分离的介孔纳米材料,并通过FT-IR,XRD,HR-TEM,FESEM, BET,VSM和元素分析(CHN和ICP)。通过芳基醛,伯胺和仲胺的一锅四组分反应,成功地将合成的磁性介孔纳米材料用作基本的纳米催化剂,用于非对映选择性合成2-(N-氨基甲酰基乙酰胺)取代的2,3-二氢噻吩1 EtOH / H 2的1:2 v / v混合物中的1,3-噻唑烷二酮和丙二腈在60°C下为O。使用这种方法,短时间(25-45分钟)后,所有产品均获得了良好至极佳的收率(83-94%)。第8次重复使用后,通过相同的分析研究其化学结构,从而证明了该催化剂的化学和物理稳定性。