Diazo-compounds are of considerable importance in a variety of industries and research laboratories. As such, the development of new and more general green methods for their preparation is of significant interest. 1 Recently, ionic liquids have emerged as novel green reaction media for many organic transformations. 2 Surprisingly, to the best of our knowledge; there is no report on diazo-transfer reactions in ionic liquid. In this Letter, we present the synthesis of diazo- ...