Regio- and Chemoselective CH Chlorination/Bromination of Electron-Deficient Arenes by Weak Coordination and Study of Relative Directing-Group Abilities
作者:Xiuyun Sun、Gang Shan、Yonghui Sun、Yu Rao
DOI:10.1002/anie.201300176
日期:2013.4.15
It's all relative: A practical and efficient PdII‐catalyzed regio‐ and chemoselectivechlorination/bromination has been developed for the facile synthesis of a broad range of aromatic chlorides. The reaction demonstrates excellent reactivity, good functional‐group tolerance, and high yields. A preliminary study was conducted to evaluate relative directing‐group abilities of various functionalities
Pd-Catalyzed sp2 C–H Hydroxylation with TFA/TFAA via Weak Coordinations
作者:Yu Rao
DOI:10.1055/s-0033-1339871
日期:——
An efficient sp2 C–H hydroxylation has been developed for the synthesis of a wide range of functionalized phenols with aryl ketones, benzoates, benzamides, acetanilides and sulfonamides through palladium(II) catalysis. A trifluoroacetic acid (TFA)/trifluoroacetic anhydride (TFAA) co-solvent system serves as the oxygen source and is the critical factor for weak coordination promoted C–H activation.
已开发出一种有效的 sp2 C-H 羟基化反应,用于通过钯 (II) 催化合成各种官能化酚与芳基酮、苯甲酸酯、苯甲酰胺、乙酰苯胺和磺酰胺。三氟乙酸(TFA)/三氟乙酸酐(TFAA)共溶剂体系作为氧源,是弱配位促进C-H活化的关键因素。