esters and α,α-dibromination of 1,3-diketones and β-keto esters without catalyst is reported using ammonium bromide as a bromine source and oxone® as an oxidant. The reaction proceeds at ambient temperature and yields range from moderate to excellent. Bromination of unsymmetrical ketones takes place at the less substituted α-position predominantly. Aromatisation of tetralones is also carried out with this
一种高效,环保,经济的方法,无需催化剂即可选择性地将芳烷基,环状,无环,1,3-二酮和β-酮酯进行α-单
溴化,以及将1,3-二酮和β-酮酯进行α,α-二
溴化使用
溴化铵作为
溴源和过
硫酸氢钾报道®作为氧化剂。反应在环境温度下进行,收率范围从中等到极好。不对称酮的
溴化主要发生在取代度较低的α位上。四氢
萘酮的芳构化也用该试剂系统进行。