Highly Diastereoselective Addition Reaction of Ketene Silyl Acetals to Imines Catalyzed by Samarium(II) Iodide

In the presence of a catalytic amount of a samarium(III) iodide, the addition reaction of ketene silyl acetal to imine afforded the corresponding (beta)-aminoester with high antiselectivity, The reaction of chiral imine under the same conditions gave (beta)-aminoester with high diastereoselectivity.