features cheap reagent, convenient operations, mild reaction conditions and broad substrate scope. Moreover, this study revealed that the loading of NaH in tosylation reactions of nitrogen-containing compounds with NaH as a base in DMA or DMF should be controlled due to the possibility of adverse detosylation.
Discovery and characterization of an acridine radical photoreductant
作者:Ian A. MacKenzie、Leifeng Wang、Nicholas P. R. Onuska、Olivia F. Williams、Khadiza Begam、Andrew M. Moran、Barry D. Dunietz、David A. Nicewicz
DOI:10.1038/s41586-020-2131-1
日期:2020.4.2
copper5,6. Although various closed-shell organic molecules have been shown to behave as competent electron-transfer catalysts in photoredoxreactions, there are only limited reports of PET reactions involving neutral organicradicals as excited-state donors or acceptors. This is unsurprising because the lifetimes of doublet excited states of neutral organicradicals are typically several orders of magnitude
光致电子转移 (PET) 是一种现象,化学物质对光的吸收为电子转移反应提供能量驱动力1,2,3,4. 这种机制与许多化学领域相关,包括自然和人工光合作用、光伏和光敏材料的研究。近年来,光氧化还原催化领域的研究使 PET 能够用于催化生成中性和带电的有机自由基物种。这些技术使以前无法实现的化学转化成为可能,并已广泛用于学术和工业环境。这种反应通常由吸收可见光的有机分子或钌、铱、铬或铜的过渡金属配合物催化5,6. 尽管各种闭壳有机分子已被证明在光氧化还原反应中充当有效的电子转移催化剂,但涉及中性有机自由基作为激发态供体或受体的 PET 反应的报道有限。这并不奇怪,因为中性有机自由基的双重激发态的寿命通常比已知的过渡金属光氧化还原催化剂的单重激发态寿命短几个数量级7,8,9,10,11。在这里,我们记录了最大激发态氧化电位为 -3.36 伏的中性吖啶自由基与饱和甘汞电极的发现、表征和反应性,后者
Selective N1-Acylation of Indazoles with Acid Anhydrides Using an Electrochemical Approach
作者:D. M. M. Mevan Dissanayake、Aaron K. Vannucci
DOI:10.1021/acs.orglett.8b03683
日期:2019.1.18
An electrochemical synthesis method for the selective N1-acylation of indazoles has been developed. This “anion pool” approach electrochemically reduces indazole molecules generating indazole anions and H2. Acidanhydrides are then introduced to the solution resulting in selective acylation of the N1-position of the indazoles. This procedure can also be applied to the acylation of benzimidazoles and indoles
Vanilloid Receptor Ligands, Pharmaceutical Compositions Containing Them, Process for Making Them, and Use Thereof for Treating Pain and Other Conditions
申请人:FRANK Robert
公开号:US20090156590A1
公开(公告)日:2009-06-18
Vanilloid receptor ligand compounds corresponding to formula I:
pharmaceutical compositions containing such compounds, a process for producing such compounds, and methods of using such compounds for treating or inhibiting pain and various other disorders or conditions.