Abstract
Amino acid ionic liquid Schiff base derived from dl-threonine and salicylaldehyde was complexed with copper (II) ions and used as an efficient and reusable catalyst for multicomponent synthesis of propargylamines via A3 coupling of aldehydes, amines, and alkynes. The ionic liquid derived catalyst was readily synthesized, reusable and exhibited superior catalytic activity. The synthesized catalyst showed consistent activity for several runs without any significant loss in activity and importantly, no leaching had occurred during this course.
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