A novel magnetically separable catalyst was prepared based on surface modification of Fe304 magnetic nanoparticle (IVINPs) with polyethyleneimine (PEI) via covalent bonding. 13-(2,3-Epoxypropoxy)propyl] trimethoxysilane (EPO) was used as cross linker to bond PEI on the surface of MNPs with permanent stability in contrast to PEl coating via electrostatic interactions. The synthesized catalyst was characterized by Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA). X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and vibrating sample magnetometry (VSM). The catalyst show high efficiency for one-pot synthesis of 2-amino-3-cyano 4/1 pyran derivatives via multi-component reaction (MCR). This procedure offers the advantages of green reaction media, high yield, short reaction time, easy purification of the products and simple recovery and reuse of the catalyst by simple magnetic decantation without significant loss of catalytic activity. (C) 2014 Elsevier B.V. All rights reserved,
Mechano-Biocatalytic Rapid Synthesis of 2-Amino-3-cyano-4H-pyran Derivatives
作者:Xiaohe Chu、Ling Jiang、Qingqing Lu、Jingwen Dong
DOI:10.3987/com-21-14608
日期:——
A series of 2-amino-3-cyano-4H-pyrans 4a-4s and 5a-5r were synthesized in good to excellent yields via a simple one-pot reaction. The facile method depended on one-pot three-component reaction of aromatic aldehyde, malononitrile and dimedone or 3-(dimethylamino)phenol in the presence of bovine serum albumin (BSA) as the catalyst under ball-milling conditions. The reactions were completed in 40 min
通过简单的一锅法反应合成了一系列 2-氨基-3-氰基-4 H-吡喃4a - 4s和5a - 5r ,收率良好。简便的方法依赖于在球磨条件下,在牛血清白蛋白(BSA)作为催化剂存在下,芳香醛、丙二腈和二甲酮或3-(二甲氨基)苯酚的一锅三组分反应。反应在 40 分钟内完成,产率为 80-98%。合成的化合物通过1 H NMR、13 C NMR和ESI-MS进行了表征。