The enantioselectiveaddition of aldehydes to diethylazodicarboxylate in ionicliquids in the presence of chiralorganocatalysts has been investigated. Of seven differentorganocatalysts tested, L-proline and L-thiazoline-2-carboxylic acid gave the highest enantioselectivities (up to 94 % ee). The best results were obtained by using [bmim]PF6 and [hmim]BF4 as ionicliquids. The scope of the methodology