Add time:07/28/2019         Source:sciencedirect.com

A small quantity of Rh2(O2CC7H15)4 (2.5 mol % to 0.6 mol %) catalyzed the α-amidation of cyclic ethers under mild conditions, 35 °C, in the presence of electron-withdrawing p-chlorobenzenesulfonamide/PhI(OAc)2 as the nitrene source, in CH2Cl2 for 4 h. The corresponding N-substituted amino cyclic ethers were successfully obtained in good yields (up to 87% based on 99% conversion) and compatibility with other oxidant sensitive structures in one-pot reaction.

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