N-Carbamate Protected a-Amidoalkyl-p-tolylsulfones: Convenient Substrates in the aza-Morita-Baylis-Hillman Reaction.

[摘要]：An efficient and practical one-pot approach to aza-Morita-Baylis-Hillman adducts has been developed. The reaction occurs between N-Boc or N-Cbz imines, generated in situ from stable and easy to handle N-Boc or N-Cbz protected a-amidoalkyl-p-tolylsulfones, and electron-deficient alkenes in the presence of DABCO. The presented procedure eliminates the use of the relatively unstable N-carbamate imines prior to the coupling reaction. The reaction is limited to a-amidosulfones derived from arom. and heteroarom. aldehydes.

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