Carbamates with Differential Mechanism of Inhibition Toward Acetylcholinesterase and Butyrylcholinesterase
作者:Sultan Darvesh、Katherine V. Darvesh、Robert S. McDonald、Diane Mataija、Ryan Walsh、Sam Mothana、Oksana Lockridge、Earl Martin
DOI:10.1021/jm8002075
日期:2008.7.1
Most carbamates are pseudoirreversible inhibitors of cholinesterases. Phenothiazine carbamates exhibit this inhibition of acetylcholinesterase but produce reversible inhibition of butyrylcholinesterase, suggesting that they do not form a covalent bond with the catalytic serine. This atypical inhibition is attributable to pi-pi interaction of the phenothiazine moiety with F329 and Y332 in butyrylcholinesterase
Visible-light-enabled ruthenium-catalyzed para-C−H difluoroalkylation of anilides
作者:Yaohang Cheng、Xian Zhang、Guanghui An、Guangming Li、Zhenyu Yang
DOI:10.1016/j.cclet.2022.06.048
日期:2023.3
Visible-light-mediated para-C–H difluoroalkylation of anilides via combination of steric effects and Lewis acid activation strategies has been developed. The addition of (C6H5O)2P(O)OH and Ag2CO3 properly tune the redox potential of ruthenium catalyst and leads to mild reaction conditions. The protocol exhibits broad functional group tolerance and allows the late-stage functionalization of complex
已经开发了通过空间位阻效应和路易斯酸活化策略的组合对苯胺的可见光介导的对-C-H二氟烷基化。(C 6 H 5 O) 2 P(O)OH 和 Ag 2 CO 3的添加适当地调节了钌催化剂的氧化还原电位并导致温和的反应条件。该协议表现出广泛的官能团耐受性,并允许复杂生物活性分子的后期功能化。
One-Pot Tandem Access to Phenothiazine Derivatives from Acetanilide and 2-Bromothiophenol <i>via</i> Rhodium-Catalyzed C–H Thiolation and Copper-Catalyzed C–N Amination
作者:Xiyan Rui、Chao Wang、Dongjuan Si、Xuechao Hui、Keting Li、Hongmei Wen、Wei Li、Jian Liu
DOI:10.1021/acs.joc.1c00403
日期:2021.5.7
Photocatalytic Deoxygenation of Sulfoxides Using Visible Light: Mechanistic Investigations and Synthetic Applications
作者:Aimee K. Clarke、Alison Parkin、Richard J. K. Taylor、William P. Unsworth、James A. Rossi-Ashton
DOI:10.1021/acscatal.0c00690
日期:2020.5.15
The photocatalytic deoxygenation of sulfoxides to generate sulfides facilitated by either Ir[(dF(CF3)ppy)2(dtbbpy)]PF6 or fac-Ir(ppy)3 is reported. Mechanistic studies indicate that a radical chain mechanism operates, which proceeds via a phosphoranyl radical generated from a radical/polar crossover process. Initiation of the radical chain was found to proceed via two opposing photocatalytic quenching
On-Demand Generation and Use in Continuous Synthesis of the Ambiphilic Nitrogen Source Chloramine
作者:Kelley E. Danahy、Evan D. Styduhar、Aria M. Fodness、Laurel M. Heckman、Timothy F. Jamison
DOI:10.1021/acs.orglett.0c03021
日期:2020.11.6
Herein, we demonstrate the on-demand synthesis of chloramine from aqueous ammonia and sodium hypochlorite solutions, and its subsequent utilization as an ambiphilic nitrogen source in continuous-flow synthesis. Despite its advantages in cost and atom economy, chloramine has not seen widespread use in batch synthesis due to its unstable and hazardous nature. Continuous-flow chemistry, however, provides