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
NOVEL COMPOUNDS ADVANTAGEOUS IN THE TREATMENT OF CENTRAL NERVOUS SYSTEM DISEASES AND DISORDERS
申请人:Pesyan Amir
公开号:US20110046128A1
公开(公告)日:2011-02-24
A series of novel compounds showing anticonvulsant, chemical countermeasure(s), and analgesic activities is described. Such pharmaceutically active compounds may also show utility in the treatment of other central nervous system (“CNS”) diseases and disorders, such as anxiety, depression, insomnia, migraine headaches, schizophrenia, Parkinson's disease, spasticity, Alzheimer's disease, and bipolar disorder. Furthermore, such compounds may additionally find utility as analgesics (e.g., for the treatment of chronic or neuropathic pain) and as neuroprotective agents useful in the treatment of stroke(s), chronic neurodegenerative diseases (such as Alzheimer's disease and Huntington's disease), and/or traumatic brain and/or spinal cord injuries. Moreover, these/such compounds may also be useful in the treatment of status epilepticus and/or as chemical countermeasures.
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.