Investigation of <i>O</i>
-Sulfonylation-promoted Heterolytic NO Bond Cleavage of Amidoximes and Ketoximes
作者:Tsung-Han Hsieh、Pen-Yuan Liao、Yu-Ting Liu、Chien-Hong Wang、Chia-Chi Lin、Tun-Cheng Chien
DOI:10.1002/jccs.201700104
日期:2018.3
es via intramolecular electrophilic aromatic substitution. When the amide nitrogen was replaced with carbon substituents, oxime derivatives of benzoins and benzils underwent Beckmann fragmentation reactions upon sulfonylation, whereas sulfonylation of 2‐phenylacetophenone oxime afforded exclusively the Beckmann rearrangement adduct.
N-苯基苯甲酰胺肟的磺酰化反应中观察到两种不同的反应途径。在加热温度下与o- NsCl的反应通过Tiemann重排产生N,N'-二苯基脲,而在较低温度下与Ts 2 O的反应通过分子内亲电芳族取代形成2-苯基苯并咪唑。当酰胺氮被碳取代基取代时,安息香和苯甲肟的肟衍生物在进行磺酰化时会发生Beckmann裂解反应,而2-苯基苯乙酮肟的磺酰化则仅产生Beckmann重排加合物。