A novel and convenient method for the synthesis of new derivatives of pyrido[3,2-e]pyrrolo[1,2-a][1,4]diazepine-6,11-dione
作者:Abderrahman El Bouakher、Gildas Prié、Mina Aadil、Said Lazar、Mohamed Akssira、Marie-Claude Viaud-Massuard
DOI:10.1016/j.tet.2012.09.079
日期:2012.11
been developed for the efficient synthesis of 1,4-pyridopyrrolodiazepine derivatives. The key reaction is the bromination under mild conditions by NBS of compounds resulting via peptide coupling of l-proline methyl ester with 3-aminopyridine-2-carboxylic acid 1, then intramolecular cyclization in the construction of 2-bromo-6a,7,8,9-tetrahydro-5H-pyrido[3,2-e]pyrrolo[1,2-a][1,4]diazepine-6,11-dione 4.
已经开发出有效合成1,4-吡啶并吡咯并二氮杂卓衍生物的新颖方法。关键反应是在温和条件下用NBS进行化合物的溴化反应,该过程是通过将1-脯氨酸甲酯与3-氨基吡啶-2-羧酸1进行肽偶联而形成的,然后在2-溴-6a,7、8的分子内环化,9-四氢-5 H-吡啶并[3,2- e ]吡咯并[1,2- a ] [1,4]二氮杂-6,11-二酮4。然后将后者进行交叉偶联反应,生成1,4-吡啶并吡咯并二氮杂pine衍生物5a - m,6a - i,7和8a – c。该策略提供了一种基于特权子结构访问化合物库的有效方法,这些子结构在药物开发中引起了人们的极大兴趣。