An efficient domino reaction in ionic liquid: Synthesis and biological evaluation of some pyrano- and thiopyrano-fused heterocycles
作者:Narsidas J. Parmar、Rikin A. Patel、Bhagyashri D. Parmar、Navin P. Talpada
DOI:10.1016/j.bmcl.2013.01.079
日期:2013.3
An improved domino/Knoevenagel-hetero-Diels–Alder reaction of two new aldehyde substrates; 7-olefinoxy-coumarin-8-carbaldehyde and 2-alkensulfanyl-quinoline-3-carbaldehyde, with pyrazolones was studied in ionic liquid triethylammonium acetate (TEAA), affording a series of pyrazolopyran annulated-pyrano-fused coumarins, and thiopyrano-fused quinolones. Besides acting as catalyst, since no additional