A new and efficient protocol for straightforward synthesis of chromeno[3,4-b]pyrrol-4(3H)-one derivatives by palladium-catalyzed sequential coupling/cyclization reactions has been developed. The key strategy relies on creation of pyrrole ring through palladium-catalyzed intramolecular hydroamination of related acetylenic aminocoumarins. The synthetic utility of the obtained chromeno[3,4-b]pyrrol-4(3H)-one
开发了一种新的有效协议,可以通过
钯催化的顺序偶联/环化反应直接合成chromeno [3,4- b ] pyrrol-4(3 H)-one衍
生物。关键策略依赖于通过
钯催化相关炔属
氨基
香豆素的分子内加
氢胺化来形成
吡咯环。通过四步法方便地合成多环lamellarin支架,已证明了所获得的chromeno [3,4- b ]
吡咯-4(3 H)-产物的合成效用。它为合成潜在有价值的lamellarin类似物提供了新的机会。