Halodeboronation of organotrifluoroborates using tetrabutylammonium tribromide or cesium triiodide
作者:Min-Liang Yao、George W. Kabalka、David W. Blevins、Marepally Srinivasa Reddy、Li Yong
DOI:10.1016/j.tet.2012.03.016
日期:2012.5
Halodeboronation of organotrifluoroborates using commercially available tetrabutylammonium tribromide (TBATB) or cesium triiodide in aqueous medium is reported. The mild, transition metal-free method has proven to be tolerant of a wide range of functional groups. High regio- and chemoselectivity are observed. Two synthetic routes to (Z)-dibromoalkenes from alkynes, through stereodefined (Z)-2-brom
报道了在水介质中使用市售的三溴化四丁基铵(TBATB)或三碘化铯对有机三氟硼酸盐进行卤代硼烷化。事实证明,这种温和的不含过渡金属的方法可耐受多种官能团。观察到高的区域选择性和化学选择性。两个合成路线(ż)从炔-dibromoalkenes,通过stereodefined(ż)-2- bromoalkenyltrifluoroborates和(Ž)-1,2-双(硼烷基)alkenyltrifluoroborates,已经使用TBATB介导bromodeboronation作为关键步骤开发的。