Direct Transformation of Terminal Alkynes into Amidines by a Silver-Catalyzed Four-Component Reaction
作者:Binbin Liu、Yongquan Ning、Matteo Virelli、Giuseppe Zanoni、Edward A. Anderson、Xihe Bi
DOI:10.1021/jacs.8b11039
日期:2019.1.30
An unprecedented conversion of terminal alkynes into N-sulfonimidamides (amidines) is reported by a silver-catalyzed, one-pot, four-component reaction with TMSN3, sodium sulfinate, and sulfonyl azide. The reaction scope includes both aromatic and aliphatic alkynes. A possible cascade reaction mechanism, consisting of alkyne hydroazidation, sulfonyl radical addition, 1,3-dipolar cycloaddition by TMSN3
据报道,通过与 TMSN3、亚磺酸钠和磺酰叠氮化物的银催化、一锅法、四组分反应,末端炔烃前所未有地转化为 N-磺酰亚胺酰胺(脒)。反应范围包括芳香族和脂肪族炔烃。提出了一种可能的级联反应机制,包括炔烃氢叠氮化、磺酰基加成、TMSN3 的 1,3-偶极环加成和逆向 1,3-偶极环加成。发现 TMSN3 在反应的每个步骤中都发挥着重要作用。