Synthesis of benzofurans from the cyclodehydration of α-phenoxy ketones mediated by Eaton’s reagent
作者:Zhanwei Ma、Min Zhou、Lin Ma、Min Zhang
DOI:10.1177/1747519820907244
日期:2020.7
acid) is used to prepare 3-substituted or 2,3-disubstituted benzofurans with moderate to excellent yields under mild conditions. The method provides a facile access to benzofurans from readily available starting materials such as phenols and α-bromo ketones. The reaction is highly efficient, which is attributed to the good reactivity and fluidity of Eaton’s reagent. The reaction can be applied to prepare
Iodine(III)-mediated α-acetoxylation of aromatic ketones
作者:Jiansheng Tang、Min Zheng、Yao Chen、Cancheng Guo
DOI:10.3184/174751911x13081595869649
日期:2011.6
In the presence of iodobenzene diacetate with potassium iodide, aromatic α-phenoxy ketones underwent α-acetoxylation to afford corresponding α-acetoxy ketones smoothly at room temperature in moderate to good yields.
An asymmetrichydrosilylation of α-oxygenated ketones was developed under the catalysis of Co(OAc)2 in combination with a chiral phosphine-amido-oxazoline (PAO) ligand, providing a mild, efficient, and enantioselective access to a variety of synthetically useful 1,2-diol derivatives. This protocol can be carried out at the gram scale with a catalyst loading of 1 mol %, and its synthetic utility was