Tributyl(3-sulfopropyl)phosphonium hydrogen sulfate (TBSPHS) as a novel task-specific phosphonium ionic liquid: A robust catalyst for the synthesis of 1,5-dihydro-2H-pyrrol-2-ones

A novel ionic liquid namely Tributyl(3-sulfopropyl)phosphonium hydrogen sulfate (TBSPHS) promoted the synthesis of 1,5-dihydro-2H-pyrrol-2-one derivatives via a one-pot three component condensation of varied aromatic aldehydes, aniline derivatives and pyruvic acid.226