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。
Iron/Palladium-Catalyzed Intramolecular Hydroamination: An Expedient Synthesis of Pyrrole-Annulated Coumarin and Quinolone Derivatives
作者:K. Majumdar、Nirupam De、B. Roy
DOI:10.1055/s-0030-1258311
日期:2010.12
A highly efficient intramolecular hydroamination reaction of heterocycle-centered aminoalkynes using both substituted and free amines catalyzed by PdCl2/FeCl3 catalytic system to form the biologically important pyrrolocoumarin and pyrroloquinolone derivatives is reported. The use of both aliphatic and aromatic substituted alkynes with different heterocyclic skleton in this strategy demonstrated the