Bu4NI-Catalyzed C–C Bond Cleavage and Oxidative Esterification of Allyl Alcohols with Toluene Derivatives
作者:Yaoyao Chen、Chengliang Li、Yongmei Cui、Mingming Sun、Xueshun Jia、Jian Li
DOI:10.1055/s-0039-1690105
日期:2019.10
groups for further functionalization and enriches the reactivity profile of allyl alcohol and toluene derivatives. In addition, this protocol represents a new transformation of allyl alcohol involving C–C bond cleavage and C–O bond forming. A novel oxidative esterification of 1-arylprop-2-en-1-ols with toluene derivatives catalyzed by tetrabutylammonium iodide (TBAI) is reported. The optimization of
Esterification of the Primary Benzylic C–H Bonds with Carboxylic Acids Catalyzed by Ionic Iron(III) Complexes Containing an Imidazolinium Cation
作者:Bing Lu、Fan Zhu、Hong-Mei Sun、Qi Shen
DOI:10.1021/acs.orglett.7b00148
日期:2017.3.3
The first iron-catalyzedesterification of the primary benzylic C–H bonds with carboxylic acids using di-tert-butyl peroxide as an oxidant is achieved by novel ionic iron(III) complexes containing an imidazolinium cation. The use of well-defined, air-stable, and available iron(III) complex in a 5 mol % loading and readily available starting materials with a broad generality and outstanding sterically
magnesiates bearing bidentate dianionic pyrrolyl ligands have been synthesized through co-complexation with alkali-metal reagents and di-n-butylmagnesium. Single-crystal X-ray structural analysis of these complexes revealed a variety of intriguing bonding modes. These alkali-metal (Li, Na, and K) organomagnesiates were utilized as catalysts for cross-coupling Tishchenko reactions with twodifferent aldehydes
Sodium organoaluminate containing bidentate pyrrolyl ligand: Synthesis, structure, and catalytic activity for the Tishchenko reaction
作者:Yu Liu、Zhiqiang Guo、Yakong Wang
DOI:10.1016/j.jorganchem.2021.121882
日期:2021.7
An novel sodium organoaluminate containing bidentate pyrrolyl ligand [C4H3NH(2-CH2NHtBu)] was efficiently synthesized and characterized by X-raycrystallography. The molecular structure shows it is a monodimensional infinite chain structures with linear arrangements. Its basic repeat unit comprises the Al atom bonded to two deprotonated pyrrole rings and Na atom coordinated to of nitrogen atoms of
高效合成了一种新型的含有双齿吡咯基配体[C 4 H 3 NH(2-CH 2 NH t Bu)]的有机铝酸钠,并通过X射线晶体学对其进行了表征。分子结构表明它是具有线性排列的一维无限链结构。它的基本重复单元包含的铝原子键合至两个去质子化的吡咯环和Na原子配位到-N的氮原子的吨卜片段,其经历进一步的ƞ坐标的相邻分子的吡咯环2 -fasion。此外,该有机铝酸钠对Tishchenko反应表现出高催化活性。
Titration of Nonstabilized Diazoalkane Solutions by Fluorine NMR
作者:Victor L. Rendina、Jason S. Kingsbury
DOI:10.1021/jo202214e
日期:2012.1.20
A new protocol for titrating nonstabilized diazoalkane solutions by quantitative 19F NMR is reported. An excess of 2-fluorobenzoic acid dissolved in CDCl3 is treated with the diazoalkane solution at a low temperature, immediately forming the corresponding 2-fluorobenzoate ester upon warming. A significant difference in the 19F chemical shift between the ester and acid is seen, allowing facile and accurate
报道了通过定量19 F NMR滴定不稳定的重氮烷溶液的新方案。用重氮烷溶液在低温下处理溶解在CDCl 3中的过量的2-氟苯甲酸,在加热后立即形成相应的2-氟苯甲酸酯。观察到酯和酸之间在19 F化学位移方面存在显着差异,从而可以轻松,准确地积分来确定滴度。该过程安全,快速,并且可以高精度指示活性重氮烷浓度。