Mild Copper(I) Iodide/β-Keto Ester Catalyzed Coupling Reactions of Styryl Bromides with Phenols, Thiophenols, and Imidazoles
作者:Weiliang Bao、Yunyun Liu、Xin Lv
DOI:10.1055/s-2008-1067082
日期:——
An efficient and mild vinylation of O-, S-, and N-nucleophiles is reported. Copper(I) iodide/ethyl 2-oxocyclohexanecarboxylate is used as the catalytic system. The protocol tolerates a broad range of functional groups on the substrates, and gives the corresponding aryl styryl ethers, aryl styryl sulfides, and N-styrylimidazoles in moderate to excellent yields as well as with good stereoselectivity.
Pyrolysis of azetidinone derivatives: a versatile route towards electron-rich alkenes, C-1 allylation and/or homologation of aldehydes
作者:Nouf S. Al-Hamdan、Osama M. Habib、Yehia A. Ibrahim、Nouria A. Al-Awadi、Osman M. E. El-Dusouqui
DOI:10.1039/c4ra01024h
日期:——
β-thiolactams led essentially to stereoselective synthesis of the high energy electron-rich Z-alkenes. Extension of this methodology to the pyrolysis of 3-allyloxy derivatives gave a simple direct route to the synthetically important 4-pentenal. These pyrolytic transformations convert aldehydes to aryloxyalkenes (a protected homologation) and 4-pentenal (a C-1 allylation and homologation). The starting