A RAPID AND EFFICIENT CYCLOADDITION OF SIMPLE IMINES WITH ACTIVATED DIENES LEADING TO AMINO SUGARS; UNUSUALLY HIGH "CHELATION-CONTROLLED" DIASTEREOSELECTIVITY IN THE ADDITION TO AN α,β-DIHYDROXY IMINE PROTECTED AS A KETAL

Article abstract of DOI:10.1016/S0040-4039(00)80572-9

The addition of a ketal-protected imine to an activited diene using diethylaluminium chloride as a catalyst leads to an unexpected "chelation-controlled" product.