A Safe, Convenient and Efficient One-Pot Synthesis of α-Chloroketone Acetals Directly from Ketones Using Iodobenzene Dichloride
作者:Chi Zhang、Jun Yu
DOI:10.1055/s-0029-1216856
日期:2009.7
aliphatic and aromatic ketones, can be directly converted into their corresponding α-chloroketone acetals in high to excellent yields using iodobenzenedichloride in ethylene glycol in the presence of 4 Å molecular sieves at room temperature. ketones - iodobenzene - dichloride - halogenation - hypervalent iodine - acetals
A new process that could directly prepare α-haloacetal of ketones from various ketones with N-halosuccinimide (NBS/NCS) and ethylene glycol in one step without any other catalysts was reported. The effects of solvents, NBS/NCS and reaction temperature were investigated. Under the optimal condition, most of α-haloacetals of ketones were obtained in 90–100% yield.