Intramolecular Palladium-Catalyzed Aminocarboxylation of Olefins as a Direct Route to Bicyclic Oxazolidinones
作者:Elena Borsini、Gianluigi Broggini、Andrea Fasana、Simona Galli、Maisaa Khansaa、Umberto Piarulli、Micol Rigamonti
DOI:10.1002/adsc.201000889
日期:2011.4.18
An efficient, direct synthesis of oxazolidinones fused to six‐membered heterocyclic rings starting from carbamate‐protected aminoalkenes has been developed. This procedure is based on an oxidative palladium(II)‐catalyzed reaction performed in the presence of stoichiometric copper chloride, which is determinant to promote the formation of the bicyclic product and prevent the isolation of the monocyclic
从氨基甲酸酯保护的氨基烯烃开始,已经开发了一种高效,直接合成与六元杂环稠合的恶唑烷酮的方法。该程序基于在化学计量的氯化铜存在下进行的氧化钯(II)催化反应,该反应决定性地促进了双环产物的形成并阻止了单环胺化产物的分离。恶唑烷酮类化合物是在最初由钯促进的CC双键上的氮原子转移后,通过氨基甲酸酯氧的直接干预而产生的,由多米诺氨基羧化过程产生。