59258-76-3Relevant academic research and scientific papers
One-step for the preparation of α-haloacetal of ketones with N-bromosuccinimide/N-chlorosuccinimide (NBS/NCS) and ethylene glycol
Zheng, Zubiao,Han, Bingbing,Wu, Fang,Shi, Tengfei,Liu, Jie,Zhang, Yong,Hao, Jialong
, p. 7738 - 7743 (2016/11/17)
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.
A safe, convenient and efficient one-pot synthesis of α-chloroketone acetals directly from ketones using iodobenzene dichloride
Yu, Jun,Zhang, Chi
experimental part, p. 2324 - 2328 (2010/01/13)
Various ketones, including aliphatic and aromatic ketones, can be directly converted into their corresponding α-chloroketone acetals in high to excellent yields using iodobenzene dichloride in ethylene glycol in the presence of 4 A molecular sieves at room temperature. Georg Thieme Verlag Stuttgart.
A Convenient Procedure for the Synthesis of Acetals from α-Halo Ketones
Carlson, Rolf,Gautun, Hanna,Westerlund, Andreas
, p. 57 - 60 (2007/10/03)
A study for determining the scope and limitations of a procedure for synthesising ethylene acetals from haloketones is presented. The method uses 1,2-bis(trimethylsilyloxy)ethane, BTSE, as reagent and Nafion-TMS as catalyst. Two procedures have been tested: (A) stoichiometric amounts of the haloketone and BTSE and a catalytic amount of Nafion-TMS were heated to reflux in chloro-form solution, and (B) stoichiometric amounts of the reactants and a catalytic amount of Nafion-TMS were heated to 90-100°C in the absence of solvent. The following ketones have been tested: 2-bromo-1-phenyl-1-ethanone, 2-bromo-cyclopentenone, 3-bromo-3-methyl-2-butanone, 3-chloro-3-methyl-2-butanone, 1-bromo-3,3-dimethyl-2-butanone, 1-chloro-3,3-dimethyl-2-butanone, 2-bromocyclohexanone, 2-chloro-1-cyclohexyl-1-ethanone, 1,1-dibromo-3,3-dimethyl-2-butanone, 1,3-dibromo-3-methyl-2-butanone, 1,3-dibromo-2-butanone, 1,3-dibromo-2-propanone, 2-chloro-1-phenyl-1-ethanone, and endo-2-bromocamphor. Yields were in the range 57-100% with the exceptions of endo-2-bromocamphor which afforded 10% yield and the dibromoketones 1,1-dibromo-3,3-dimethyl-2-butanone and 1,3-dibromo-3-methyl-2-butanone for which the method failed. Factors determining the scope and limitations are briefly discussed. Full experimental details and spectroscopic data of the acetals are given.
