A Convenient Synthesis of β-Aminoesters. The Reaction of Imines with Ketene Silyl Acetals Catalyzed by Phosphonium Salts

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Abstract
In the presence of a catalytic amount of a diphosphonium salt, the reaction of various imines, including 2-[N-(diphenylmethyl)formimidoyl]-pyridine, with ketene silyl acetals proceeded smoothly to afford the corresponding β-aminoesters in good yields.