Ligand‐Controlled Regiodivergence in Nickel‐Catalyzed Hydroarylation and Hydroalkenylation of Alkenyl Carboxylic Acids**
作者:Zi‐Qi Li、Yue Fu、Ruohan Deng、Van T. Tran、Yang Gao、Peng Liu、Keary M. Engle
DOI:10.1002/anie.202010840
日期:2020.12.14
the ligand environment around the metal center dictates the regiochemical outcome. Markovnikov hydrofunctionalization products are obtained under mild ligand‐free conditions, with up to 99 % yield and >20:1 selectivity. Alternatively, anti‐Markovnikov products can be accessed with a novel 4,4‐disubstituted Pyrox ligand in excellent yield and >20:1 selectivity. Both electronic and stericeffects on the
An atom-economic approach to carboxylic acids via Pd-catalyzed direct addition of formic acid to olefins with acetic anhydride as a co-catalyst
作者:Yang Wang、Wenlong Ren、Yian Shi
DOI:10.1039/c5ob01180a
日期:——
An effective Pd-catalyzed hydrocarboxylation of olefins using formic acid with acetic anhydride as a co-catalyst is described.
一种利用甲酸和乙酸酐作为共催化剂,通过Pd催化的烯烃水合羧化方法被描述。
Ligand-Enabled Pd(II)-Catalyzed β-Methylene C(sp<sup>3</sup>)–H Arylation of Free Aliphatic Acids
作者:Liang Hu、Guangrong Meng、Jin-Quan Yu
DOI:10.1021/jacs.2c09205
日期:2022.11.16
has enabled rapid advances in Pd(II)-catalyzed β-methyl C(sp3)–H activation of free carboxylic acids. However, there are only a handful of reports of free-acid-directed β-methylene C(sp3)–H activation, all of which are limited to intramolecular reactions. Herein, we report the first Pd(II)-catalyzed intermolecular β-methylene C(sp3)–H arylation of free aliphaticacids, which is enabled by bidentate pyridine–pyridone
α-ketoglutarate-dependent aryloxyalkanoate dioxygenases (AADs) are repurposed for applications in biocatalytic oxyfunctionalization. Activity profiling of natural AADs enabled the synthesis of four types of α-and β-hydroxy acids with broad scope, high efficiency, and good selectivity.