developed. The synthesis proceeds stereoselectively in three steps, using 1,3-dipolar cycloaddition of azomethine ylides as a key step. First, a series of 4-arylpyrrolidine-3-carboxylic acids have been prepared from the appropriate cinnamic esters and a non-stabilized azumeihine ylide. The reduction of a nitro group on the aromatic ring was followed by acid-catalyzed intramolecular lactam formation.
已开发出一条通往
吡咯并 [3,4-c]
喹啉环系的新路线。该合成分三步立体选择性地进行,使用偶氮甲碱叶立德的 1,3-偶极环加成作为关键步骤。首先,从适当的
肉桂酸酯和不稳定的 azumeihine 叶立德制备了一系列 4-芳基
吡咯烷-3-
羧酸。芳环上的硝基还原后,酸催化的分子内内酰胺形成。