Substituent Effect in the Synthesis of α,α‐Dibromoketones, 1,2‐Dibromalkenes, and 1,2‐Diketones from the Reaction of Alkynes and Dibromoisocyanuric Acid
作者:Eunjeong Cho、Aravindan Jayaraman、Junseong Lee、Kyoung Chul Ko、Sunwoo Lee
DOI:10.1002/adsc.201801535
日期:2019.4.16
dibromoisocyanuric acid/H2O to afford α,α‐dibromoketone and 1,2‐diketone derivatives. Diarylalkynes with activating groups provided 1,2‐diketone derivatives as the major products, whereas diarylalkynes with a non‐activating group or alkylarylalkynes gave α,α‐dibromoketone derivatives as the major products. In addition, diarylalkynes with deactivating groups provided 1,2‐dibromoalkenes. The reaction was conducted at
内部炔烃与二溴异氰尿酸/ H 2 O反应,得到α,α-二溴酮和1,2-二酮衍生物。具有活化基团的二芳基炔烃提供1,2-二酮衍生物作为主要产物,而具有非活化基团的二芳基炔烃或烷基芳基炔烃提供的α,α-二溴酮衍生物为主要产物。此外,带有失活基团的二芳基炔烃可提供1,2-二溴烯烃。该反应在室温下进行,并且在大多数情况下显示出良好的产率。已经基于实验观察和密度泛函理论(DFT)计算提出了反应途径。