of a variety of aromatic heterocycles such as furan, pyrrole and thiophene derivatives with secondary hydrosilanes has been achieved by using an yttrium metallocene complex. This protocol provides an efficient and straightforward way for the synthesis of a series of silylated heteroaromatic compounds containing tertiary silane moieties without the need for an additive or H2 acceptor.
Calcium Mediated C−H Silylation of Aromatic Heterocycles with Hydrosilanes
作者:Xun Gong、Peng Deng、Jianhua Cheng
DOI:10.1002/cctc.202200060
日期:2022.5.6
Catalytic regioselective C−H silylation of a variety of aromaticheterocycles such as thiophene, furan and indole derivatives with secondary hydrosilanes was achieved by using a calcium catalyst. This protocol provides an efficient route to the synthesis of silylated heteroaromatic compounds without the need for an H2 acceptor and free of transition metal. Calcium thiophenyl complex (2), proposed as
通过使用钙催化剂实现了多种芳族杂环(如噻吩、呋喃和吲哚衍生物)与仲氢硅烷的催化区域选择性 C-H 甲硅烷基化。该协议提供了一种合成硅烷化杂芳族化合物的有效途径,无需 H 2受体且不含过渡金属。提出作为催化反应中间体的苯硫钙络合物( 2 ) 被分离并进行了结构表征。