Electrophilic activation of secondary amides with trifluoromethanesulfonic anhydride in the presence of 2-fluoropyridine followed by introduction of a pyridine N-oxide derivative and warming affords the corresponding N-pyridinyl tertiary amide derivatives. A mechanism supported by in situ monitoring and deuterium labeling experiments is discussed.
Direct Dehydrative <i>N</i>-Pyridinylation of Amides
作者:Jonathan William Medley、Mohammad Movassaghi
DOI:10.1021/jo802355d
日期:2009.2.6
Electrophilic activation of secondary amides with trifluoromethanesulfonic anhydride in the presence of 2-fluoropyridine followed by introduction of a pyridine N-oxide derivative and warming affords the corresponding N-pyridinyl tertiary amide derivatives. A mechanism supported by in situ monitoring and deuterium labeling experiments is discussed.
Visible‐light Induced Cerium‐catalyzed
<i>N</i>
‐Demethylation of
<i>N</i>
‐Methyl Amides under Air Conditions
A visible-light induced cerium-catalyzed N-demethylation of N-methyl amides under air atmosphere to the corresponding of N-demethylated amides is presented. Upon irradiation the excited states of [CeIVCln]2− are able to activate N-methyl amides. This reaction provides a methodology to cleave the C−N bond of amides under air conditions.
提出了可见光诱导的铈催化的N-甲基酰胺在空气气氛下的N-去甲基化反应为相应的N-去甲基化酰胺。在辐照时,[Ce IV Cl n ] 2−的激发态能够激活N-甲基酰胺。该反应提供了一种在空气条件下裂解酰胺 C-N 键的方法。