Sulfamicacid supported on magnetic Fe3O4 nanoparticles catalyzed the condensation reaction of aldehydes, 1,3-dicarbonyl compounds, and urea or thiourea in the synthesis of 3,4-dihydropyrimidin-2(1H)-ones/thiones under solvent-free conditions. This method offers several advantages including high yield, short reaction time, ease of separation, and recyclability of the magnetic catalyst.
磁性Fe 3 O 4纳米粒子上负载的氨基磺酸催化在溶剂-溶剂下合成3,4-二氢嘧啶-2(1 H)-酮/硫酮时醛,1,3-二羰基化合物与脲或硫脲的缩合反应。免费条件。该方法具有几个优点,包括高产率,短反应时间,易于分离和磁性催化剂的可回收性。
Zhao, Ying; Zhao, Yongguang; Zhang, Jianping, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2015, vol. 54B, # 1, p. 139 - 141
作者:Zhao, Ying、Zhao, Yongguang、Zhang, Jianping、Liu, Hongmei、Liang, Liman
DOI:——
日期:——
Acidic task-specific ionic liquid as catalyst of microwave-assisted solvent-free Biginelli reaction
作者:A. Arfan、L. Paquin、J. P. Bazureau
DOI:10.1134/s1070428007070202
日期:2007.7
A simple and effective synthesis of 3,4-dihydropyrimidin-2(1H)-one and 3,4-dihydropyrimidine-2(1H)-thione derivatives has been developed on the basis of three-component condensation of substituted aromatic and heterocyclic aldehydes, methyl acetoacetate, and urea or thiourea in the presence of 10% of an acidic task-specific ionic liquid ([C(4)mim][HSO4]) as catalyst under microwave irradiation in the absence of a solvent. The proposed procedure ensures short reaction times (4.4-8 min) and good yields after purification by recrystallization.
Polymer-Supported 4-Aminoformoyldiphenylammonium Triflate (PS-AFDPAT): An Effective and Recyclable Catalyst for the Biginelli Reaction
作者:Ming Lei、Dong-Dong Wu、He-Geng Wei、Yan-Guang Wang
DOI:10.1080/00397910802393109
日期:2009.1.13
Abstract Polymer-supported 4-aminoformoyldiphenylammonium triflate (PS-AFDPAT) was used as an effective catalyst for the synthesis of 3,4-dihydropyrimidin-2(1H)-ones (DHPMs) via the Biginellireaction. This immobilized catalyst could be easily recovered by simple filtration and recycled for 10 runs without significant decrease of the catalytic activity.