A route to benzylic arylsulfoxides from β-ketosulfoxides
作者:Meng-Yang Chang、Yu-Chieh Cheng、Chieh-Kai Chan
DOI:10.1016/j.tet.2016.05.038
日期:2016.7
The K2CO3-mediated benzylation of β-ketosulfoxides 4 with 2.0 equiv of benzylic halides 5 affords benzylic arylsulfoxides 6 in moderate yields along with trace amounts of chalcones 7. The products 6 are assumed to form in situ intermediates of sulfenate anions from β-ketosulfoxides which are commonly involved in carbon–sulfur bond formation. A plausible mechanism has been proposed.
用2当量的苄基卤化物5进行的K 2 CO 3介导的β-酮亚砜4的苄基化反应可中等产率地得到苄基芳基亚砜6以及痕量的查耳酮7。假定产物6原位形成了β-酮亚砜中的亚硫酸根阴离子的中间体,这些中间体通常参与碳-硫键的形成。已经提出了一种合理的机制。
The preparation of trichloro(phenyl 2-pyridylmethyl sulphoxide)gold(III) and the kinetics and equilibria of its formation and subsequent reactions
作者:Lucio Cattalini、Gavino Chessa、Giampaolo Marangoni、Bruno Pitteri、Martin L. Tobe
DOI:10.1039/dt9850002091
日期:——
In the complex [Au(N–SO)Cl3], formed between [AuCl4]– and phenyl 2-pyridylmethyl sulphoxide (N–SO), the ligand is bound only through the nitrogen and all attempts to induce chelation were unsuccessful. The kinetics of the forward and reverse reactions in methanol–water (95:5, v/v) at 25.0 °C are also consistent with the ligand acting as a substituted pyridine with a pKa of 3.39 (water, 25 °C) and the
在[AuCl 4 ] -与苯基2-吡啶基甲基亚砜(N-SO)之间形成的络合物[Au(N–SO)Cl 3 ]中,配体仅通过氮键结合,所有诱导螯合的尝试均未成功。在25.0°C的甲醇-水(95:5,v / v)中进行正向和反向反应的动力学也与配体充当取代吡啶,ap K a为3.39(水,25°C)和与2-甲基吡啶具有相同的位阻。将金(III)的行为与铂(II)的行为进行了比较。