Ambient Intermolecular [2 + 2] Cycloaddition: An Example of Carbophilicity and Oxophilicity Competition in Au/Ag Catalysis
摘要:
The gold-catalyzed intermolecular [2 + 2] cycloaddition of propargyl esters was achieved with good stereoselectivity. The "silver-free" condition was critical for this transformation, while only a trace amount of [2 + 2] products were formed in the presence of silver under otherwise identical conditions.
A DDQ-promoted metal-free cross-coupling of 1,3-diarylpropynes with hydroxyl via Sp3 C–H bond activation to form C–O bond
作者:Hanjie Mo、Weiliang Bao
DOI:10.1016/j.tet.2011.05.030
日期:2011.7
A metal-free coupling reaction between 1,3-diarylpropynes and alcohols/phenols/acids via propargylic sp3 C–H bonds activation and C–O bond formation reaction promoted by DDQ was realized. The reaction afforded series of propargylethers, propargyl esters and propargyl ketals.
Ambient Intermolecular [2 + 2] Cycloaddition: An Example of Carbophilicity and Oxophilicity Competition in Au/Ag Catalysis
作者:Yijin Su、Yanwei Zhang、Novruz G. Akhmedov、Jeffrey L. Petersen、Xiaodong Shi
DOI:10.1021/ol500854m
日期:2014.5.2
The gold-catalyzed intermolecular [2 + 2] cycloaddition of propargyl esters was achieved with good stereoselectivity. The "silver-free" condition was critical for this transformation, while only a trace amount of [2 + 2] products were formed in the presence of silver under otherwise identical conditions.