Synthesis of a SO3H-bearing carbonaceous solid catalyst, PEG–SAC: application for the easy access to a diversified library of pyran derivatives
作者:Sanjay Paul、Sirshendu Ghosh、Pranabes Bhattacharyya、Asish R. Das
DOI:10.1039/c3ra42352b
日期:——
A SO3H-bearing carbonaceous solid catalyst (PEG–SAC) has been synthesized through sulfonation followed by a hydrothermal carbonization method from renewable resources like polyethylene glycol. The biodegradable catalyst was characterized by XRD, TEM, FT-IR and EDX. The surface area and pore diameter of the catalyst were determined from a nitrogen adsorption–desorption isotherm experiment. A highly
This work is focused on the development of an efficient and green protocol for the one-pot multicomponent synthesis of a series of 4H-pyran derivatives.
这项工作专注于开发一个高效且环保的一锅多组分合成协议,用于合成一系列4H-吡喃衍生物。
Ethylenediammonium diformate (EDDF) in PEG600: an efficient ambiphilic novel catalytic system for the one-pot synthesis of 4H-pyrans via Knoevenagel condensation
作者:Anuj Thakur、Mohit Tripathi、U. Chinna Rajesh、Diwan S. Rawat
DOI:10.1039/c3ra42410c
日期:——
system was developed as a catalyst for the Knoevenagel condensation and Knoevenagel initiated three-componentone-potsynthesis of 4H-pyrans at room temperature with high yields and in short reaction times. Further, the EDDF-PEG600 catalytic system was recycled six times without any appreciable loss in its activity and hence can be termed as a green, environmentally benign catalytic system. A plausible
An efficient simple, metal-free, one-pot protocol for the synthesis of dihydropyrrole derivatives has been achieved via sequential addition of iodobenzenediacetate and secondary amine to 2-amino-4H- pyran derivatives. The one-pot protocol proceeds through tandem oxidative functionalization, rearrangement, and ring contraction to provide an entirely new strategy for the construction of the dihydropyrrole
Synthesis, molecular modeling and BACE-1 inhibitory study of tetrahydrobenzo[b] pyran derivatives
作者:Vijaya Bhaskar、Reshma Chowdary、Sheshagiri R. Dixit、Shrinivas D. Joshi
DOI:10.1016/j.bioorg.2018.11.023
日期:2019.3
documented as one of the possible therapeutic targets for the treatment of Alzheimer's disease. In this paper, we report the synthesis and the for β-secretase (BACE-1) inhibitory activity of new series of tetrahydrobenzo [b] pyranderivatives. One-pot synthesis of tetrahydrobenzo [b] pyrans was carried out by condensing aromatic aldehyde, malononitrile and 1,3-cyclohexanedione using ionic liquid 1-butyl-3-methyl