Preparation and properties of a novel solution of hydrogen bromide (HBr) in 1,4-dioxane: An alternative reagent to HBr gas without protic solvents
作者:Yuya Nishio、Ryota Mifune、Taisuke Sato、Shin-ich Ishikawa、Hiroshi Matsubara
DOI:10.1016/j.tetlet.2017.02.020
日期:2017.3
A solution of hydrogen bromide (HBr) in 1,4-dioxane was prepared and investigated for its ability to brominate alcohols, and hydrobrominate alkenes. This study revealed that the brominating ability of this HBr/1,4-dioxane solution is equal or superior to that of hydrobromic acid or HBr in acetic acid. The solution of HBr in 1,4-dioxane is robust, exhibiting no decomposition of the solvent, and retaining
制备了溴化氢(HBr)在1,4-二恶烷中的溶液,并研究了其溴化醇和氢溴化烯烃的能力。这项研究表明,这种HBr / 1,4-二恶烷溶液的溴化能力等于或优于氢溴酸或HBr在乙酸中的溴化能力。当在-25°C下放置30天时,HBr在1,4-二恶烷中的溶液坚固耐用,不分解溶剂,并保持其原始浓度的97%。该溶液是不含质子溶剂的HBr气体的液体替代品。