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
Alkylation of Ethyl Nitroacetate in the Absence of Solvent
作者:E. Díez-Barra、A. de la Hoz、A. Moreno
DOI:10.1080/00397919408010189
日期:1994.7
Abstract Alkylation of ethyl nitroacetate by solid-liquid phase transfer catalysis (PTC) in solvent-free conditions has been performed. In regard to other chemical procedures the method provide a simplification of the experimental procedure; however, not in all cases, yield are improved.
Constraining the Side Chain of C-Terminal Amino Acids in Apelin-13 Greatly Increases Affinity, Modulates Signaling, and Improves the Pharmacokinetic Profile