Palladium-Catalyzed <i>ortho</i>-C(sp<sup>2</sup>)–H Silylation of Aromatic Ketones Using an Aminooxyamide Auxiliary
作者:Jianhua Li、Meiying Ding、Chao Jiang
DOI:10.1021/acs.orglett.1c03214
日期:2021.12.3
selective ortho-C(sp2)–H silylation of aromatic ketones has been achieved using an aminooxyamide auxiliary. The reaction tolerates various orth-, meta-, and para- substituents on the aromatic ring and can be applied to thiophenyl and vinyl ketones. The ortho-C(sp2)–H bond was monosilylated selectively in comparison with other aromatic C–H bonds, benzyl or allylic C(sp3)–H bonds, and acidic α-C(sp3)–H bonds
已经使用氨基氧酰胺助剂实现了钯催化的芳香酮的直接和选择性邻-C(sp 2 )-H 硅烷化。将反应容忍各种ORTH - ,间位-和对位芳族环上的取代基,并且可以被应用到噻吩基和乙烯基酮- 。的邻-C(SP 2)-H键是在与其他芳族C-H键,苄基或选择性地比较烯丙基单甲硅烷C(SP 3)-H键,和酸性α-C(SP 3)-H键。氨基氧酰胺助剂在硅烷化反应后易于安装和去除。由此产生的邻域-甲硅烷基芳族酮衍生物是有机合成的潜在有用构件。