Sulfonylation-Induced <i>N</i>- to <i>O</i>-Acetyl Migration in 2-Acetamidoethanol Derivatives
作者:Takao Yamaguchi、Dusan Hesek、Mijoon Lee、Allen G. Oliver、Shahriar Mobashery
DOI:10.1021/jo100456z
日期:2010.5.21
example of sulfonylation-induced N- to O-acetyl migration of 2-acetamidoethanol derivatives is described. This type of reaction could happen with any 2-acetamidoethanol derivatives under typical sulfonylation conditions (TsCl or MsCl, pyridine) and might be a common side reaction of significance. Furthermore, the results reveal that 2-acetamidoethanol derivatives with a sterically encumbered hydroxyl
General and Chemoselective N-Transacylation of Secondary Amides by Means of Perfluorinated Anhydrides
作者:Paola Rota、Pietro Allevi、Raffaele Colombo、Maria L. Costa、Mario Anastasia
DOI:10.1002/anie.200906055
日期:2010.3.1
A direct route: The N‐transacylation of secondaryamides to their perfluorinated analogues with the possibility of subsequent conversion into a normal amide is reported (see scheme). This reaction occurs in the presence of a variety of functional groups that are labile to the hydrolysis conditions required by classical N‐transacylation.