Palladium-Catalyzed Site-Selective Fluorination of Unactivated C(sp<sup>3</sup>)–H Bonds
作者:Jinmin Miao、Ke Yang、Martin Kurek、Haibo Ge
DOI:10.1021/acs.orglett.5b01710
日期:2015.8.7
The transition-metal-catalyzed direct C–H bond fluorination is an attractive synthetic tool toward the preparation of organofluorines. While many methods exist for the direct sp3 C–H functionalization, site-selective fluorination of unactivated sp3 carbons remains a challenge. Direct, highly site-selective and diastereoselective fluorination of aliphatic amides via a palladium-catalyzed bidentate ligand-directed
过渡金属催化的直接C–H键氟化是制备有机氟的有吸引力的合成工具。尽管存在许多直接进行sp 3 C–H官能化的方法,但未活化的sp 3碳的位点选择性氟化仍然是一个挑战。据报道,通过钯催化的双齿配体定向的C–H键官能化过程,可以在未活化的sp 3碳上进行直接,高度位点选择性和非对映选择性的氟化。用这种方法,以乙酸钯为催化剂,Selectfluor为氟源,制备了多种在医学和农业化学中重要的基序的β-氟化氨基酸衍生物和脂族酰胺。