Condensation of propargylic alcohols with indoles and carbazole in [bmim][PF6]/Bi(NO3)3·5H2O: a simple high yielding propargylation method with recycling and reuse of the ionic liquid

Propargylation of a variety of substituted indoles as well as mono- and di-propargylation of carbazole are achieved in 80-94% isolated yields by employing catalytic amounts (10 mol %) of the readily available Bi(NO3)3·5H2O in [bmim][PF6] ionic liquid (IL), with repeated recycling and reuse of the IL.