Divergent synthesis of indoles, oxindoles, isocoumarins and isoquinolinones by general Pd-catalyzed retro-aldol/α-arylation
作者:Song-Lin Zhang、Ze-Long Yu
DOI:10.1039/c6ob01979j
日期:——
Divergent synthesis of indoles, oxindoles, isocoumarins and isoquinolinones is described in this report by using a general Pd-catalyzed tandem reaction of β-hydroxy carbonyl compounds with aryl halides bearing an ortho-nitro, -ester or -cyano substituent. A key retro-aldol/α-arylation reaction is involved that merges classic Pd cross-coupling chemistry with novel Pd-promoted retro-aldol C–C activation
该报告中描述了吲哚,羟吲哚,异香豆素和异喹啉酮的不同合成方法,该方法使用一般的Pd催化的β-羟基羰基化合物与带有邻-硝基,-酯或-氰基取代基的芳基卤化物串联反应。涉及一个关键的逆醛醇/α-芳基化反应,该反应将经典的Pd交叉偶联化学与新型的Pd促进的逆醛醇C–C活化相结合,生成α-芳基化的酮或酯。羰基与邻合子的随后分子内缩合得到目标杂环。普通的,可商购的和便宜的底物和催化剂体系的使用为概念上的意义增加了额外的合成优势。