Rational design and expeditious synthesis of aromatic cyanodienone derivatives assisted by cyanide-halide exchange
Abstract
1-n-Butyl-3-methylimidazolium cyanide ([bmim]CN), in the presence of [bmim]Br has been prepared and used for the first time as the medium as well as reagent for the synthesis of aromatic cyanodienones from the corresponding triarylpyrylium perchlorates by cyanide-halide exchange. The [bmim]CN having a reactive anion, is an accelerated reaction technique without external solvent and renders the whole synthesis into a truly eco-friendly protocol. The products can be isolated without aqueous work-up in high purity and excellent yield.
Keyword(s)
Cyanodienone, triarylpyrylium perchlorate, 1-n-butyl-3-methylimidazolium cyanide, cyanide-halide exchange, environmentally friendly methodology, ionic liquid
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