Mechanistic Pathways in Amide Activation: Flexible Synthesis of Oxazoles and Imidazoles
作者:Giovanni Di Mauro、Boris Maryasin、Daniel Kaiser、Saad Shaaban、Leticia González、Nuno Maulide
DOI:10.1021/acs.orglett.7b01678
日期:2017.7.21
α-aminoamides through triflic anhydride-mediated amide activation is reported. These reactions proceed via the intermediacy of nitrilium adducts and feature N-oxide-promoted umpolung of the α-position of amides as well as a mechanistically intriguing sequence that results in sulfonyl migration from nitrogen to carbon. Quantum-chemical mechanistic analysis sheds light on the intricacies of the process