贵金属技术的替代以及利用地球上丰富的金属实现新的反应性是可持续合成的核心。迄今为止,烯烃加氢最有效地是通过贵金属催化剂进行的。本研究报道了一种铁催化的三取代和四取代烯烃氢化方案,该方案在温和条件(1-4 bar H 2,20 °C)下具有前所未有的活性和范围。通过分离充当催化剂库和颗粒生长的可溶种子的新型铁纳米簇结构,记录了均相和非均相铁催化界面的指导性快照。
An efficient catalytic approach for the synthesis of substituted peroxides, alcohols, and ketones through a catalyst-controlledhighlyselective dioxygenation of olefins has been demonstrated. The reported methods are mild and practical, can be switched by the selection of different catalytic systems, and employ peroxide as an oxidant and a reagent at room temperature.
methylenation of acyl fluorides and acyl chlorides with substituted with aryl, alkenyl, and alkyl groups trimethylaluminum afforded an array of 2-substituted propene derivatives. The addition of a catalytic amount of DPPM increased an efficiency of the reactions. Trimethylaluminum as the methylenation reagent not only eliminates the presynthesis of methylene transfer reagent, but provides an efficient method for
Direct visible-light-mediated aminofluorination of styrenes has been developed with high regioselectivity. Shelf-stable N-Ts-protected 1-aminopyridine salt was used as the nitrogen-radical precursor, and the commercially available hydrogen fluoride-pyridine was used as the nucleophilic fluoride source. The synthesis of an analogue of LY503430 was performed to demonstrate the synthetic value of this
Visible-Light-Driven, Metal-Free Divergent Difunctionalization of Alkenes Using Alkyl Formates
作者:Ming Zheng、Jing Hou、Le-Wu Zhan、Yan Huang、Ling Chen、Li-Li Hua、Yan Li、Wan-Ying Tang、Bin-Dong Li
DOI:10.1021/acscatal.0c04332
日期:2021.1.15
difunctionalization of alkenes has received considerable attention as an efficient and straightforward way to increase molecular complexity. However, examples of the difunctionalization of alkenes initiated by the intermolecular addition of alkoxycarbonyl radicals providing substituted alkanoates are still rare. Herein, we present the visible light-driven metal-free divergent difunctionalization of alkenes triggered
Hydroarylation of Alkenes Using Anilines in Hexafluoroisopropanol
作者:Ignacio Colomer
DOI:10.1021/acscatal.0c00872
日期:2020.6.5
one to modulate bioactive molecules. This work reports a method for the selective functionalization of anilines using hexafluoroisopropanol (HFIP) as a solvent to promote an acid-catalyzed hydroarylation of olefins. Mechanistic experiments revealed that HFIP both protonates the alkene and selectively enables anilines toward the electrophilic aromatic substitution. This powerful strategy has been applied