Synthesis of <i>N</i>-(Isoquinolin-1-yl)sulfonamides via Ag<sub>2</sub>O-Catalyzed Tandem Reaction of <i>ortho</i>-Alkynylbenzaldoximes with Benchtop Stabilized Ketenimines
作者:Sepideh Hayatgheybi、Hormoz Khosravi、Hossein Zahedian Tejeneki、Frank Rominger、Hamid Reza Bijanzadeh、Saeed Balalaie
DOI:10.1021/acs.orglett.1c00937
日期:2021.5.7
this project, a moderately efficient approach to multisubstituted N-(isoquinolin-1-yl)sulfonamide derivatives was illustrated, utilizing ortho-alkynylbenzaldoximes and zwitterionic ketenimine salts in a tandem reaction catalyzed by silver oxide. The oxophilicity of Ag2O, along with its nature as Lewis acid, pave the way for a smooth [3 + 2] cycloaddition between isoquinoline N-oxides and ketenimine species
在该项目中,通过在氧化银催化的串联反应中使用邻炔基苯甲醛肟和两性离子烯酮亚胺盐,说明了一种中等有效的多取代N- (异喹啉-1-基)磺酰胺衍生物方法。Ag 2 O的亲氧性及其作为路易斯酸的性质为异喹啉N氧化物和烯酮亚胺之间的 [3 + 2] 环加成顺利进行铺平了道路,这是该反应的关键步骤。DFT 计算表明硝酮和烯酮亚胺的 1,3-偶极环加成通过选择性逐步机制进行。