Metal-Free C–N or C–C Bond Cleavages of α-Azido Ketones: An Oxidative-Amidation Strategy for the Synthesis of α-Ketothioamides and Amides
作者:Pei Yu、Yuwei Wang、Zhigang Zeng、Yunfeng Chen
DOI:10.1021/acs.joc.9b01777
日期:2019.11.15
α-azido ketones with elemental sulfur could form α-ketothioacyl azide, which was then nucleophilically attacked by amines, causing the cleavage of the C-N bond to afford α-ketothioamides, while amides could be formed with the release of nitrogen gas and cyano anion in the presence of PhI(OAc)2 by selective C-C bond cleavage.
提出了一种新型的无金属氧化酰胺化策略,用于由α-叠氮基酮合成α-酮硫代酰胺和酰胺。α-叠氮基酮的CH键与元素硫的硫键化可形成α-酮硫代酰基叠氮化物,然后被胺类亲核攻击,导致CN键断裂,生成α-酮硫代酰胺,而酰胺可随氮的释放而形成。 PhI(OAc)2存在下通过选择性CC键裂解产生的气体和氰基阴离子。