Chiral <i>N</i>-Acyloxazolidines: Synthesis, Structure, and Mechanistic Insights
作者:Martín Ávalos、Reyes Babiano、Pedro Cintas、José L. Jiménez、Mark E. Light、Juan C. Palacios、Esther M. S. Pérez
DOI:10.1021/jo702149m
日期:2008.1.1
cis-configured derivative. Both isomers can also exist as rotational conformers (E,Z) as a consequence of the restricted rotation around the N-acetyl bond. The barriers to rotation have been determined by variable-temperature experiments. Overall, this transformation most likely involves the intermediacy of a chiral iminium ion, which has been documented in the synthesis of nitrogen heterocycles, thus