Highly Efficient Syntheses of Azetidines, Pyrrolidines, and Indolines via Palladium Catalyzed Intramolecular Amination of C(sp<sup>3</sup>)–H and C(sp<sup>2</sup>)–H Bonds at γ and δ Positions
作者:Gang He、Yingsheng Zhao、Shuyu Zhang、Chengxi Lu、Gong Chen
DOI:10.1021/ja210660g
日期:2012.1.11
palladium-catalyzed intramolecular amination of C-H bonds at the γ and δ positions of picolinamide (PA) protected amine substrates. These methods feature relatively a low catalyst loading, use of inexpensive reagents, and convenient operating conditions. Their selectivities are predictable. These methods highlight the use of unactivated C-H bond, especially the C(sp(3))-H bond of methyl groups, as functional
已经开发出有效的方法来合成氮杂环丁烷、吡咯烷和二氢吲哚化合物,通过钯催化在吡啶酰胺 (PA) 保护的胺底物的 γ 和 δ 位置的 CH 键的分子内胺化。这些方法具有相对较低的催化剂负载量、使用廉价试剂和方便的操作条件。它们的选择性是可以预测的。这些方法强调使用未活化的 CH 键,尤其是甲基的 C(sp(3))-H 键,作为有机合成中的官能团。