Synthesis of 2,3-dihydro-3-hydroxy-2-(pyrrol-1-ylmethyl)-1<i>H</i>-isoindol-1-one. An intermediate for the synthesis of tetracyclic systems
作者:Anna Korenova、Pierre Netchitailo、Bernard Decroix
DOI:10.1002/jhet.5570350102
日期:1998.1
and the potassium salt of pyrrole gave N-(pyrrol-1-ylmethyl)pbthalimide 2. Reduction of 2 led to the hydroxyisoindolone 3. This hydroxylactam cyclized under acidic conditions to lead to a pyrroloimidazoloisoindolone 4 via an acyliminium ion. Transformation of 3 with acetic acid derivatives provided 5, 7 and 9 which gave by intramolecular cyclization, tetracyclic compounds 6, 10 and 11.
N-氯甲基邻苯二甲酰亚胺1和吡咯的钾盐得到N-(吡咯-1-基甲基)对苯二甲酰亚胺2。2的还原导致羟基异吲哚酮3。该羟基内酰胺在酸性条件下环化,通过酰基亚胺离子生成吡咯并咪唑并异吲哚酮4 。用乙酸衍生物转化3提供5、7和9,其通过分子内环化得到四环化合物6、10和11。