Unusual Tethering Effects in the Schmidt Reaction of Hydroxyalkyl Azides with Ketones: Cation−π and Steric Stabilization of a Pseudoaxial Phenyl Group
作者:Christopher E. Katz、Jeffrey Aubé
DOI:10.1021/ja0382361
日期:2003.11.1
The Lewis acid-promoted reactions of chiral 2-aryl-3-azido-1-propanols with 4-substituted cyclohexanones lead to iminium ethers and ultimately caprolactams (following a hydrolysis step). In this study, it is shown that these reactions afford variable ratios of products, depending on the electronic nature of the phenyl group. These results are interpreted in the context of a cation-pi stabilizing effect