Oxidation of Hydrobenzoins to Benzils by Ammonium Chlorochromate/Montmorillonite K-10 Under Ultrasound Irradiation
摘要:
The oxidation of hydrobenzoins to the corresponding benzils was carried out in excellent yield by ammonium chlorochromate (ACC) supported on montmorillonite K10 in CH2Cl2 at room temperature under ultrasound irradiation.
Reductive Coupling of Aromatic Aldehydes and Acetophenone Induced by TiCl4-Al/CH2(COOEt)2
作者:Chang-Ying Song、Shu-Xiang Wang、Wen-Hao Chu、Ji-Tai Li、Zheng Zhou、Hong-Yu Li、Zi-Qing Cao
DOI:10.14233/ajchem.2013.14890
日期:——
Induced by TiCl4-Al/CH2(COOEt)2 in CH2Cl2, some aromatic aldehydes and acetophenone can afford the corresponding 1,2-diols in 13-91 % yields with good dl-diastereoselectivities within 45-60 min at room temperature.
Pinacol Coupling Reaction of Aromatic Aldehydes Mediated by Aqueous Vanadium(II) Solution Under Ultrasound Irradiation
作者:Shu‐Xiang Wang、Ke Wang、Ji‐Tai Li
DOI:10.1080/00397910500187787
日期:2005.9.1
Pinacol coupling of aromatic aldehydes by aqueous vanadium(II) solution under ultrasound irradiation at room temperature can lead to the corresponding pinacols in 54-93% yields within 15-30 min.
Synthesis of Ferrocene Derivatives with Planar Chirality via Palladium-Catalyzed Enantioselective C–H Bond Activation
The first catalytic and enantioselective C-H direct acylation of ferrocene derivative has been developed A series of 2-acyl-1-dimethylaminomethylferrocenes with planar chirality were provided under highly efficient and concise one-pot condition with up to 85% yield and 98% ee. The products obtained could be easily converted to various chiral ligands via diverse trans formations.
Mg/Triethylammonium Formate: A Useful System for Reductive Dimerization of Araldehydes into Pinacols; Nitroarenes into Azoarenes and Azoarenes into Hydrazoarenes
作者:M. GEETA PAMAR、P. GOVENDER、K. MUTHUSAMY、RUI W. M. KRAUSE、H.M. NANJUNDASWAMY
DOI:10.13005/ojc/290316
日期:2013.9.30
of triethylammoniumformate in the presence of magnesium for the efficient intermolecular pinacol coupling using MeOH as solvent. Various aromatic carbonyls underwent smooth reductive coupling to give the corresponding 1,2-diols. A series of azo compounds were obtained by the reductive coupling of nitroaromatics while azo compounds were reduced to the corresponding hydrazoarenes by this system. There