Selective Synthesis of<i>N</i>-H and<i>N</i>-Aryl Benzotriazoles by the [3 + 2] Annulation of Sodium Azide with Arynes
作者:Avishek Guin、Rahul N. Gaykar、Subrata Bhattacharjee、Akkattu T. Biju
DOI:10.1021/acs.joc.9b02198
日期:2019.10.4
arynes generated from 2-(trimethylsilyl)aryltriflates resulting in the transition-metal-free synthesis of N-H and N-aryl benzotriazoles has been demonstrated. Using CsF as the fluoride source in CH3CN, the N-H benzotriazoles are formed in high selectivity instead of the expected azidobenzene. Interestingly, N-aryl benzotriazoles are formed using KF and THF as solvent in an open-flask reaction. Moreover,
已证明NaN3在[3 + 2]环合中作为叠氮化物组分的合成效用,该芳烃由2-(三甲基甲硅烷基)芳基三氟甲磺酸产生的芳烃导致无过渡金属合成NH和N-芳基苯并三唑。使用CsF作为CH3CN中的氟化物源,可以高选择性地生成NH苯并三唑,而不是预期的叠氮苯。有趣的是,在开瓶反应中使用KF和THF作为溶剂形成N-芳基苯并三唑。此外,还提出了苯并三唑的N1-芳基化的方法。