Spiro[indene-1,4′-oxa-zolidinones] Synthesis via Rh(III)-Catalyzed Coupling of 4-Phenyl-1,3-oxazol-2(3<i>H</i>)-ones with Alkynes: A Redox-Neutral Approach
作者:Zhongsu Liu、Wenjing Zhang、Shan Guo、Jin Zhu
DOI:10.1021/acs.joc.9b01804
日期:2019.9.20
C-H activation synthesis of heterocyclic spiro[4,4]nonanes has persistently witnessed the use of additional stoichiometric transition-metal oxidant when employing C═C bond as the spiro ring closure site. Herein, we have addressed the issue by reporting a redox-neutral strategy for spiro[indene-1,4'-oxa-zolidinones] synthesis via Rh(III)-catalyzed coupling of 4-phenyl-1,3-oxazol-2(3H)-ones with alkynes
杂环金属螺[4,4]壬烷的过渡金属催化CH活化合成一直证明使用C═C键作为螺环封闭位点时会使用其他化学计量的过渡金属氧化剂。在这里,我们已经解决了这个问题,报告了通过Rh(III)催化的4-苯基-1,3-恶唑2(偶合)偶联合成螺[indene-1,4'-oxa-zolidinones]的氧化还原中性策略。 3H)-带有炔烃的化合物。该合成具有广泛的底物范围和高的区域特异性。