N. Yadav, M. K. Hussain, M. I. Ansari
2013
Citations
0
Influential Citations
22
Citations
Journal
RSC Advances
Abstract
An efficient ultrasound-promoted synthesis of 2,3-disubstituted benzo[b]furans in the ionic liquid [bmim]BF4 at room temperature is reported. 5-exo-dig carbanion–yne intramolecular cyclization is mediated using anhydrous K3PO4 as a mild, inexpensive base under atmospheric conditions giving the title benzo[b]furans in excellent yields. Ionic liquid [bmim]BF4 has been used both as a reaction medium, as well as a catalyst for the C–C bond formation.