Novel one-step synthesis of 2-carbonyl/thiocarbonyl isoindolinones and mechanistic disclosure on the rearrangement reaction of o-phthalaldehyde with amide/thioamide analogs
作者:Jieping Wan、Bin Wu、Yuanjiang Pan
DOI:10.1016/j.tet.2007.07.009
日期:2007.9
rearrangement reaction of o-phthalaldehyde with urea/thiourea analogs or amides/thioamides under the catalysis of TMSCl (trimethylchlorosilane) is described, whereby a series of 2-carbonyl isoindolinones and 2-thiocarbonyl isoindolinones are afforded. This is the first time that the N-carbonyl/thiocarbonyl isoindolinones are synthesized in a single step from o-phthalaldehyde. Similar reactions using primary
描述了在TMCSC1(三甲基氯硅烷)的催化下邻苯二甲醛与脲/硫脲类似物或酰胺/硫代酰胺的重排反应,从而提供了一系列的2-羰基异吲哚啉酮和2-硫代羰基异吲哚啉酮。这是第一次从邻苯二甲醛一步合成N-羰基/硫代羰基异吲哚啉酮。使用伯胺的类似反应也可以顺利进行,得到相应的N-烷基或N-芳基异吲哚啉酮在这种温和的催化体系中。基于从全反应过程的ESI-MS时间间隔监测和氘交换实验中观察到的新证据,讨论了这种重排的机理。