Selective and Efficient Cycloisomerization of Alkynols Catalyzed by a New Ruthenium Complex with a Tetradentate Nitrogen-Phosphorus Mixed Ligand
作者:Pei Nian Liu、Fu Hai Su、Ting Bin Wen、Herman H.-Y. Sung、Ian D. Williams、Guochen Jia
DOI:10.1002/chem.200903441
日期:——
The new ruthenium complex [Ru(N3P)(OAc)][BPh4] (4), in which N3P is the N,P mixed tetradentate ligand N,N‐bis[(pyridin‐2‐yl)methyl]‐[2‐(diphenylphosphino)phenyl]methanamine was synthesized. The complex was found to be catalytically active for the endo cycloisomerization of alkynols. The catalytic reactions can be used to synthesize five‐, six‐, and seven‐membered endo‐cyclic enol ethers in good to
新的钌络合物[Ru(N 3 P)(OAc)] [BPh 4 ](4),其中N 3 P是N,P混合的四齿配体N,N-双[(吡啶-2-基)甲基合成了]-[2-(二苯基膦基)苯基]甲胺。复杂被认为是将催化活性的内炔醇环异构。催化反应可以用于合成的五元,六元,七元内以良好-环烯醇醚到优异的产率。提出了涉及亚乙烯基中间体的催化循环用于催化反应。用PhCCH和H 2 O处理配合物4,得到烷基配合物[Ru(CH2 Ph)(CO)(N 3 P)] [BPh 4 ](30),这支持了以下假设:催化反应涉及在亚乙烯基配体的CC键上添加羟基。