Reactions of Alkyl Azides and Ketones as Mediated by Lewis Acids: Schmidt and Mannich Reactions Using Azide Precursors
作者:Pankaj Desai、Klaas Schildknegt、Konstantinos A. Agrios、Craig Mossman、Gregory L. Milligan、Jeffrey Aubé
DOI:10.1021/ja000490v
日期:2000.8.1
variation of the Mannich reaction. The scope of each of these reactions, the dependence of the observed products upon azide and ketone structure, and the nature of acid promotion are discussed. In broad strokes, cyclohexanones and other cyclic ketones react in the presence of TiCl4 to afford insertion products, whereas the Mannich route predominates when benzyl azide and triflic acid are used. The features
烷基叠氮化物与酮的路易斯酸促进反应可以提供多种产品。其中最主要的原因是叠氮化物像施密特一样插入到与羰基相邻的碳 - 碳键中。或者,可以发生酸促进的叠氮化物重排为亚胺类物质,主要是使用苄基叠氮化物;在曼尼希反应的变体中,亚胺类物质可以被羰基化合物的烯醇捕获。讨论了每个反应的范围、观察到的产物对叠氮化物和酮结构的依赖性以及酸促进的性质。概括地说,环己酮和其他环状酮在 TiCl4 存在下反应生成插入产物,而当使用苄基叠氮化物和三氟甲磺酸时,曼尼希路线占主导地位。