NaNO2/I2 as an alternative reagent for the synthesis of 1,2,3-benzotriazin-4(3H)-ones from 2-aminobenzamides
作者:Dinesh S. Barak、Sushobhan Mukhopadhyay、Dipak J. Dahatonde、Sanjay Batra
DOI:10.1016/j.tetlet.2018.12.025
日期:2019.1
An efficient transformation of 2-aminobenzamides to 1,2,3-benzotriazin-4(3H)-ones in the presence of sodium nitrite (NaNO2) and Iodine (I2) is described. The reaction is proposed to proceed via formation of nitrosyl halide that induces nitrosylation of the amino group of 2-aminobenzamide leading to diazotization followed by intramolecular cyclization.
描述了在亚硝酸钠(NaNO 2)和碘(I 2)存在下将2-氨基苯甲酰胺有效转化为1,2,3-苯并三嗪-4(3 H)-一的方法。提出该反应通过形成亚硝酰卤来进行,该亚硝酰卤诱导2-氨基苯甲酰胺的氨基的亚硝基化,从而导致重氮化,然后进行分子内环化。