Denitrogenative cleavage of benzotriazoles and benzotriazinones, and selective N-desulfonylation of benzotriazoles by aluminum halides
作者:Bingqian Dong、Yunfeng Liu、Pengtao Yang、Dayong Sang、Juan Tian、Li Li、Sihui Long
DOI:10.1016/j.tetlet.2022.153965
日期:2022.8
Regiospecific denitrogenative cleavage and chemoselective N-desulfonylation of benzotriazoles and benzotriazinones by aluminum halides are investigated. Products of these transformations are dependent on the N-substituents as well as the aluminum halides. For benzotriazoles bearing an N-hydroxy or acetyl substituent, denitrogenative cleavage occurs that affords 2′-iodoacetanilides as the products when
研究了卤化铝对苯并三唑和苯并三嗪酮的区域特异性脱氮裂解和化学选择性N-脱磺酰化。这些转变的产物取决于N-取代基以及卤化铝。对于带有N-羟基或乙酰基取代基的苯并三唑,当在AlI 3和乙酸酐存在下进行时,会发生脱氮裂解,得到2'-碘乙酰苯胺作为产物。AlI 3对苯并三嗪酮的类似裂解提供了2-碘苯甲酰胺或1-菲啶酮。相反,用 AlCl 3处理 1-乙酰基苯并三唑和 1,2,3-苯并三酮分别提供苯并三唑和喹唑啉酮。相反,1-磺酰基苯并三唑更倾向于进行N-去磺酰基化。AlI 3对典型的芳族磺酰胺不反应,使 1-磺酰化苯并三唑的脱保护具有化学选择性。