V. Rao, G. V. Reddy, R. Yadla
Feb 12, 2005
Citations
0
Influential Citations
2
Citations
Journal
Arkivoc
Abstract
Microwave irradiation of [{2-(fluorophenoxy)propanoyl}-(cyano/ethoxy-carbonyl) methylene] triphenylphosphoranes resulted in the exclusive formation of fluoro-substituted 2-ethylbenzo[b]furan-3-carbonitriles and ethyl 2-ethyl-benzo[b]furan-3-carboxylic acid esters, respectively, along with triphenylphosphine oxide. The aryl propargylic ethers formed initially by the intramolecular Wittig reaction of the ylides underwent Claisen rearrangement reaction under the same reaction conditions and the resulting ortho-allenyl phenol intermediates cyclised to yield benzofurans.