Palladium-Catalyzed One-Pot Stereospecific Synthesis of 2-Deoxy Aryl C-Glycosides from Glycals and Anilines in the Presence of tert-Butyl Nitrite
作者:Adesh Kumar Singh、Rapelly Venkatesh、Jeyakumar Kandasamy
DOI:10.1055/s-0037-1611916
日期:2019.11
anomeric selectivity (i.e., α or β) of the desired products. The palladium-catalyzed one-pot synthesis of 2,3-deoxy-3-keto aryl C-glycosides is achieved from glycals and anilines in the presence of tert-butyl nitrite and aqueous HBF4 under mild conditions. This one-pot method stereospecifically provides α- and β-aryl glycosides (≥19:1 by NMR) in good yields at room temperature. The configuration at the
抽象的 在温和的条件下,在亚硝酸叔丁酯和HBF 4水溶液存在下,由糖和苯胺实现钯催化的一锅合成2,3-脱氧-3-酮芳基C-糖苷。这种一锅法在室温下以高收率立体地提供α-和β-芳基糖苷(NMR≥19:1)。糖基中C -3位置的构型决定了所需产物的端基异构体选择性(即α或β)。 在温和的条件下,在亚硝酸叔丁酯和HBF 4水溶液存在下,由糖和苯胺实现钯催化的一锅合成2,3-脱氧-3-酮芳基C-糖苷。这种一锅法在室温下以高收率立体地提供α-和β-芳基糖苷(NMR≥19:1)。糖基中C -3位置的构型决定了所需产物的端基异构体选择性(即α或β)。