Face to face activation of a phenylselenium borane with α,β-unsaturated carbonyl substrates: facile synthesis of C–Se bonds
作者:Xavier Sanz、Christopher M. Vogels、Andreas Decken、Carles Bo、Stephen A. Westcott、Elena Fernández
DOI:10.1039/c4cc02098g
日期:——
Activated olefins directly react with a phenylselenium borane, at room temperature, without any metal or organocatalytic assistance. Up to 10 examples of β-(phenylseleno) substituted ketones and aldehydes have been prepared and theoretical evidence for the mechanism opens up non-existing pathways to create Câheteroatom bonds as a general tool.
Ynones Merge Activation/Conjugate Addition of Chalcogenoborates ArE-Bpin (E=Se, S)
作者:Marc G. Civit、Xavier Sanz、Christopher M. Vogels、Carles Bo、Stephen A. Westcott、Elena Fernández
DOI:10.1002/adsc.201500650
日期:2015.10.12
The “pull–push” effect of the Bpin moiety in ArE-Bpin reagents (E=Se, S) is demonstrated by the Lewis acid interaction with the carbonyl group of ynones and the concomitant delivery of ArSe or ArS to the electron-deficient alkyne with impressive stereoselectivity. The two component reactivity is carried out in methanol to generate (Z)-β-(arylseleno)-α,β-unsaturated ketones and (Z)-β-(arylsulfuro)-α
The frustratedLewispair (FLP) [NMe2-C6H4-BH2]2 is shown to catalyze the dehydrogenative borylation of thiols. The scope of the reaction, the experimental and computational investigation of the mechanism, and the application of the system to a one-pot Michael addition on α–β unsaturated carbonyl leading to the β sulfido ketone are reported.
沮丧的路易斯对(FLP)[NMe 2 -C 6 H 4 -BH 2 ] 2显示催化硫醇的脱氢硼化。报道了反应的范围,机理的实验和计算研究,以及该系统在α-β不饱和羰基上一锅迈克尔加成反应中生成β硫代酮的应用。
Thioboration of α,β-Unsaturated Ketones and Aldehydes toward the Synthesis of β-Sulfido Carbonyl Compounds
作者:Marc G. Civit、Xavier Sanz、Christopher M. Vogels、Jonathan D. Webb、Stephen J. Geier、Andreas Decken、Carles Bo、Stephen A. Westcott、Elena Fernández
DOI:10.1021/jo5026354
日期:2015.2.20
Herein a direct β-sulfido carbonylcompound synthesis by the easy activation of RS−Bpin reagents with α,β-unsaturated ketones and aldehydes is reported. This convenient methodology can be performed at room temperature with no other additives. The key point of this reactivity is based on the Lewis acidic properties of the boryl unit of the RS−Bpin reagent interacting with the C═O oxygen. Consequently
Pyridine‐Boryl Radical Mediated Decarboxylative Homolytic Substitution of N‐hydroxyphthalimide Ester with Ar
<sub>2</sub>
X
<sub>2</sub>
(X=S, Se)
作者:Jia Cao、Liuzhou Gao、Guoqiang Wang、Shuhua Li
DOI:10.1002/ejoc.202201290
日期:2022.12.27
A pyridine-catalyzed decarboxylative C−S/Se bonds constructions with the broadly available N-hydroxyphthalimide esters and disulfides/diselenides (Ar2X2, X=S or Se) has been developed using bis(pinacolato)diboron as the reductant. This synthetic method features mild reaction conditions, operational simplicity and good functional-group tolerance.
使用双(频哪醇)二硼作为还原剂,开发了一种吡啶催化的脱羧 C−S/Se 键结构与广泛可用的 N-羟基邻苯二甲酰亚胺酯和二硫化物/二硒化物(Ar 2 X 2 ,X=S 或 Se)。该合成方法反应条件温和、操作简单、官能团耐受性好。