Highly Diastereo-and Enantioselective Silver-Catalyzed Double [3+2] Cyclization of a-Imino Esters with Isocyanoacetate**

Presented herein is a new complexity-generating method in which both functionalities of -imino esters undergo stereoselective cyclization with isocyanoacetates to produce directly linked oxazole-imidazolines, which can be transformed into highly functionalized ,-diamino esters and imidazolinium salts in high diastereo- and enantiopurity.