Synthesis of bis-coumarins over acetic acid functionalized poly(4-vinylpyridinum) bromide (APVPB) as a green and efficient catalyst under solvent-free conditions and their biological activity
AbstractIn this work, acetic acid functionalized poly(4-vinylpyridinum) bromide as a green and reusable catalyst was successfully tested on the synthesis of various bis-coumarins undersolvent-freeconditions. In addition, antioxidant and anti-inflammatory activities of the synthesized bis-coumarins were in vitro screened by 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging and formalin-induced
Green synthesis of bis‐coumarin derivatives using Fe(SD)
<sub>3</sub>
as a catalyst and investigation of their biological activities
作者:Nosrat O. Mahmoodi、Zeinab Jalalifard、Ghanbari Pirbasti Fathanbari
DOI:10.1002/jccs.201800444
日期:2020.1
A convenient, practical, green, and environmentallyfriendlymethod was developed for the synthesis of biscoumarins and corresponding tetrakis products from the reaction of 4‐hydroxycoumarin and various aldehydes. The bis‐coumarins were synthesized in high yield under mild reaction conditions. Products were obtained in the presence of in situ prepared Fe(SD)3 [Iron(III) dodecyl sulfate] as a combined
Phosphotungstic Acid: An Efficient Catalyst for the Aqueous Phase Synthesis of Bis-(4-hydroxycoumarin-3-yl)methanes
作者:Prashant Singh、Pradeep Kumar、Anju Katyal、Rashmi Kalra、Sujata K. Dass、Satya Prakash、Ramesh Chandra
DOI:10.1007/s10562-009-0239-x
日期:2010.2
In this present work, we report that phosphotungstic acid provides a simple, efficient and environmentally benign route is a two-component one-pot domino Knoevenagel-type condensation/Michael reaction between 4-coumarin derivative and an aldehyde in water as a solvent in shorter duration with high yields.[GRAPHICS].