A collection of pyrano[3,2-c] chromene, 4H-chromene and 4H-pyran were synthesized in excellent yield employing an innocuous, inexpensive and naturally occurring borax-catalyzed multicomponent domino reaction. The present protocol offers advantages in terms of higher yields, short reactions time and no workup and no column chromatography.
DABCO Catalyzed Green and Efficient Synthesis of 2-Amino-4H-Pyrans and Their Biological Evaluation as Antimicrobial and Anticancer Agents
作者:Amit S. Waghmare、Shivaji S. Pandit、Dayanand M. Suryawanshi
DOI:10.2174/1386207321666180315095422
日期:2018.5.25
efficient for the synthesis of 2-amino-4H-pyran derivatives which are achieved by a one pot three component cyclocondensation of aldehyde, malanonitrile and ethyl acetoacetate or methyl acetoacetate using DABCO undersolventfree with grinding conditions at room temperature. MATERIAL AND METHODS Some of the synthesized compounds were screened for their antimicrobial and antifungal activity. The study shows
Heterogenization of Homogeneous Catalyst: An Improved Strategy for an Efficient Synthesis of Highly Substituted 4H-Pyran Scaffolds in Aqueous Based Media
作者:S. N. Shringare、K. R. Kadam、G. R. Pandhare、V. D. Murade、A. S. Waghmare、P. N. Kamble、N. R. Kamble、D. S. Wankhede
DOI:10.1007/s10562-023-04455-3
日期:2024.5
3-disulfonic acid as an active catalytic material over the surface of micro-sized silica. The synthesis, structure, purity, thermalstability and acidstrength of the newly synthesized catalytic material were confirmed by appropriate analytical techniques such as solid-state CP-MAS 13C-NMR, CP-MAS 29Si-NMR, FT-IR, EDX, TGA, DSC and volumetric studies. An efficient and environmentally benign catalytic protocol
Green synthesis and antibacterial, antifungal activities of 4H-pyran, tetrahydro-4H-chromenes and spiro2-oxindole derivatives by highly efficient Fe3O4@SiO2@NH2@Pd(OCOCH3)2 nanocatalyst
catalytic performance of this environmentally benign nanocatalyst was investigated in the one-pot multicomponent synthesis of biologically important 2-amino-3-cyano-4H-pyran, tetrahydro-4H-chromenes and spiro2-oxindole derivatives. The reaction was simply achieved via one-pot three-component reaction of arylaldehydes, malononitrile and dimedone/isatins/methylaceto acetate ethanol at room temperature,
一种高效、磁性可回收的 Fe 3 O 4 @SiO 2 @NH 2 @Pd(OCOCH 3 ) 2通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、能量色散X射线光谱(EDX)、傅里叶变换红外光谱(FT-IR)、和功率 X 射线衍射。此后,在生物学上重要的 2-氨基-3-氰基-4H-吡喃、四氢-4H-色烯和螺2-羟吲哚衍生物的一锅多组分合成中研究了这种环境友好型纳米催化剂的催化性能。该反应是通过芳醛、丙二腈和二甲酮/靛红/乙酰乙酸甲酯乙醇在室温下的一锅三组分反应实现的,收率高,纯度高。一种新的催化体系,反应介质的可回收性,