An efficient and green synthesis of 1,4-dihydropyridine derivatives through multi-component reaction in ionic liquid
作者:Xue Sen Fan、Yan Zhen Li、Xin Ying Zhang、Gui Rong Qu、Jian Ji Wang、Xue Yuan Hu
DOI:10.1002/hc.20221
日期:——
Through multi-component condensation of aldehydes, 1,3-dione, Meldrum's acid, and ammonium acetate in an ionic liquid ([bmim][BF4]), a series of 1,4-dihydropyridine derivatives were prepared in excellent yields in the absence of any additional catalysts. In addition, [bmim][BF4] can be recovered and reused effectively for at least six times without obvious decrease of its efficiency. Advantages of
A simple, efficient, and environmentally benign protocol for the synthesis of polyhydroquinoline derivatives was developed using a bio-compatible, heterogeneous, and recoverable mesoporous ionic liquid supported nanoporous silica as a nano-catalyst. The polyhydroquinoline derivatives were obtained by the four-component reaction of aldehyde, Meldrum’s acid, dimedone, and ammonium acetate in excellent yields .
One-Pot Synthesis of 1,4-Dihydropyridine Derivatives Catalyzed by Silica-Coated Magnetic NiFe2O4 Nanoparticles-Supported H14[NaP5W30O110]
作者:B. Maleki、A. V. Mofrad、R. Tayebee、A. Khojastehnezhad、H. Alinezhad、E. Rezaei Seresht
DOI:10.1134/s1070363217120325
日期:2017.12
Silica-coated magnetic NiFe2O4 nanoparticles-supported H-14[NaP5W30O110] (NiFe2O4@SiO2-H-14[NaP5W30O110]) was successfully synthesized and shown to be a versatile and highly efficient heterogeneous catalyst for one-pot multicomponent synthesis of 1,4-dihydropyridine derivatives under solvent-free condition. The synthesized catalyst can be magnetically recovered and reused four times without significant loss in catalytic efficiency.
A joint experimental and theoretical structural study of novel substituted 2,5-dioxo-1,2,3,4,5,6,7,8-octahydroquinolines
A series of substituted 2,5-dioxo-1,2,3,4,5,5,7,8-octahydroquinolines have been synthesised from Meldrum's acid and dimedone in the presence of different aldehydes by following an approach similar to the one developed by Hantzch. The structure of these compounds has been thoroughly studied by X-ray crystallographic analysis and semiempirical (AM1) and ab initio (HF/3-21G) methods, and two favoured conformations are possible. A good agreement is found between the theoretical and experimental values. The most stable conformation (A) in the solid state is also that favoured in solution, according to the proton coupling constant determined from Karplus' and Altona's equations and H-1 NMR spectroscopic experiments. (C) 1998 Elsevier Science Ltd. All rights reserved.
LIELBRIEDIS, I. EH.;KAMPARE, R. B.;DUBUR, G. YA., IZV. AN LATVSSR. CEP. XIM.,(1990) N, S. 212-216
作者:LIELBRIEDIS, I. EH.、KAMPARE, R. B.、DUBUR, G. YA.