<i>Syn</i>-Stereoselective C3-Spirocyclization and C2-Amination of 3-(2-Isocyanoethyl)indole Using <i>C</i>,<i>N</i>-Cyclic Azomethine Imines
作者:Wen-Bin Cao、Jian-Dong Zhang、Meng-Meng Xu、Hua-Wei Liu、Hai-Yan Li、Xiao-Ping Xu、Shun-Jun Ji
DOI:10.1021/acs.orglett.2c01736
日期:2022.7.1
underexplored reaction mode of C,N-cyclic azomethine imines, a catalyst-free [1+2+3] cycloaddition/N–N bond cleavage sequential reaction for accessing spiroindolines with syn-stereoselectivity was developed. On the basis of experimental results and DFT calculations, peroxide and ethereal solvent were identified to trigger the hydrogen abstraction of the unstable [1+2+3] cycloaddition adducts, followed
通过利用C , N环偶氮甲亚胺的未充分探索的反应模式,开发了一种无催化剂的 [1+2+3] 环加成/N-N 键断裂顺序反应,用于获得具有顺式立体选择性的螺二氢吲哚。根据实验结果和 DFT 计算,确定过氧化物和醚类溶剂会引发不稳定的 [1+2+3] 环加成加合物的夺氢,然后是 N-N 键的均裂和氢吸收。