A Facile Route to Polysubstituted<i> N</i>-Benzyl Pyroglutamates
作者:Pei-Pei Sun、Meng-Yang Chang、Michael Y. Chiang、Nein-Chen Chang
DOI:10.1021/ol0344164
日期:2003.5.1
[reaction: see text] Base-induced coupling/cyclizationreactions of alpha-sulfonylacetamide with various ethyl (Z)-2-bromo-2-propenoates have been carried out. The polysubstituted pyroglutamate carbon skeleton, with three contiguous asymmetric centers, was built up in one step. A ring-closure mechanism is proposed for the reactions.