先前的研究报道了未活化的芳烃与ArX,碱(KO t Bu或NaO tBu),以及高温下的有机添加剂。最近,我们证明了该反应在室温下不存在添加剂的情况下进行,但使用的是紫外线可见光。但是,迄今为止,仍无法使用光诱导的碱促进的均相芳族取代反应(photo-BHAS)的机理的细节。这项工作检查了该反应的基本电子转移步骤(ET)的不同机理途径,以确定从1-hatantantannes(起始步骤)形成1-金刚烷基自由基的可能途径。在光化学和光物理实验以及计算研究的基础上,我们提出了前所未有的引发步骤,该步骤也可以应用于在DMSO中进行的其他ET反应。首次报道由强碱和DMSO(溶剂)形成的二甲基阴离子,
Highly regioselective lithiation of inter-ring carbon of bis(thien-2yl)methane: a general meso-elaboration protocol
摘要:
Bis(thien-2yl)methane is regioselectively lithiated at the inter-ring methylene carbon using dimsyl anion in THF at 0 degrees C: quenching with appropriate electrophile furnishes meso-elaborated derivatives, exclusively with synthetic advantage. (C) 2010 Elsevier Ltd. All rights reserved.
Reactions of sulfinyl carbanions with organometallic compounds: Preparation of (η5-C5H5)2T6H4
作者:C.R. Lucas
DOI:10.1016/s0022-328x(00)86902-8
日期:1982.10
have been observed to have often low reactivity towards neutral transition metal organometallic systems. When reactions do occur they usually involve salt eliminations and formation of complex mixtures containing inter alia organic sulfides, disulfides, freed ligands or their oxides and reduced forms of the organometallic reactants. From the sulfinyl ylide [PhS(O)CH2]Li, exo-[η5-C6H6CH2S(O)Ph]Mn(CO)3
Removal of methyl violet dye by adsorption onto N-benzyltriazole derivatized dextran
作者:Eunae Cho、Muhammad Nazir Tahir、Hwanhee Kim、Jae-Hyuk Yu、Seunho Jung
DOI:10.1039/c5ra03317a
日期:——
the removal of methylviolet dye from water. The modified dextran was synthesized by a click reaction of pentynyl dextran and benzyl azide, and the structure was characterized by nuclear magnetic resonance spectroscopy, elemental analysis, and scanning electron microscopy. Dextran was substituted with a triazole-linked benzyl group. For decolorization of the dye effluent, adsorption is a very effective
Initiation in Photoredox C–H Functionalization Reactions. Is Dimsyl Anion a Key Ingredient?
作者:María E. Budén、Javier I. Bardagí、Marcelo Puiatti、Roberto A. Rossi
DOI:10.1021/acs.joc.7b00822
日期:2017.8.18
possible path for the formation of 1-adamantyl radicals from 1-haloadamantanes (initiation step). On the basis of photochemical and photophysical experiments and computational studies, we propose an unprecedented initiation step that could also be applied to other ET reactions performed in DMSO. For the first time, it is reported that dimsyl anion, formed from a strong base and DMSO (solvent), is responsible
先前的研究报道了未活化的芳烃与ArX,碱(KO t Bu或NaO tBu),以及高温下的有机添加剂。最近,我们证明了该反应在室温下不存在添加剂的情况下进行,但使用的是紫外线可见光。但是,迄今为止,仍无法使用光诱导的碱促进的均相芳族取代反应(photo-BHAS)的机理的细节。这项工作检查了该反应的基本电子转移步骤(ET)的不同机理途径,以确定从1-hatantantannes(起始步骤)形成1-金刚烷基自由基的可能途径。在光化学和光物理实验以及计算研究的基础上,我们提出了前所未有的引发步骤,该步骤也可以应用于在DMSO中进行的其他ET反应。首次报道由强碱和DMSO(溶剂)形成的二甲基阴离子,
Genin, Denis; Andriamialisoa, R. Zo; Langlois, Nicole, Heterocycles, 1987, vol. 26, # 2, p. 377 - 383
作者:Genin, Denis、Andriamialisoa, R. Zo、Langlois, Nicole、Langlois, Yves