Amide Synthesis by Nucleophilic Attack of Vinyl Azides†
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This work was supported by funding from Nanyang Technological University and the Singapore Ministry of Education. Y.-F.W. is thankful for a Lee Kuan Yew postdoctoral fellowship (the LKY PDF). G.H.L. is grateful for financial support from the Ecole Polytechnique.
Abstract
A method for the synthesis of amide-containing molecules was developed using vinyl azides as an enamine-type nucleophile towards carbon electrophiles, such as imines, aldehydes, and carbocations that were generated from alcohols in the presence of BF3⋅OEt2. After nucleophilic attack of the vinyl azide, a substituent of the resulting iminodiazonium ion intermediate migrates to form a nitrilium ion, which is hydrolyzed to afford the corresponding amide.