Catalytic Asymmetric Vinylogous Mannich Reaction of N-(2-Thienyl)sulfonylimines.

[摘要]：Both cyclic and acyclic silyl dienol ethers participate efficiently in the asym. vinylogous Mannich reaction of N-2-thienylsulfonylimines catalyzed by copper(I) complexes of Fesulfos ligands. This procedure displays wide imine and nucleophile versatility, high enantiocontrol, and complete g-regioselectivity in most cases examd. The mild sulfonamide deprotection allows the resulting products to be readily transformed into optically active d-lactams or 5-hydroxy-2-piperidone derivs.

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