An Environmentally Sustainable Mechanochemical Route to Hydroxamic Acid Derivatives
作者:Rita Mocci、Lidia De Luca、Francesco Delogu、Andrea Porcheddu
DOI:10.1002/adsc.201600350
日期:2016.10.6
An operationally simple, and cost efficient conversion of carboxylic acids into hydroxamicacid derivatives via a high‐energy mechanochemical activation is presented. This ball milling methodology was applied to a wide variety of carboxylic acids dramatically improving purification issues associated with this class of molecules, which still remain one of the main bottlenecks of classical methodologies
Photochemical Activation of Aromatic Aldehydes: Synthesis of Amides, Hydroxamic Acids and Esters
作者:Nikolaos F. Nikitas、Mary K. Apostolopoulou、Elpida Skolia、Anna Tsoukaki、Christoforos G. Kokotos
DOI:10.1002/chem.202100655
日期:2021.5.20
the activation of aromatic aldehydes has been developed. Utilizing thioxanthen-9-one as the photocatalyst and cheap household lamps as the light source, a variety of aromatic aldehydes have been activated and subsequently converted in a one-pot reaction into amides, hydroxamic acids and esters in good to high yields. The applicability of this method was highlighted in the synthesis of Moclobemide, a
precursors in reactions with thioethers under the catalysis of a commercially available Ru(II) complex, from which a variety of sulfimides were synthesized efficiently and mildly. If an allyl group is contained in the thioether precursor, the [2,3]-sigmatropic rearrangement of the sulfimide occurs simultaneously and the N-allyl-N-(thio)amides were obtained as the final products. Preliminary mechanistic studies
Angeli−Rimini's Reaction on Solid Support: A New Approach to Hydroxamic Acids
作者:Andrea Porcheddu、Giampaolo Giacomelli
DOI:10.1021/jo061018g
日期:2006.9.1
Angeli−Rimini's reaction has been performed for the first time on solid phase. A convenient one-step procedure for the synthesis of hydroxamicacids starting from aldehydes and solid-supported N-hydroxybenzenesulfonamide is reported. The hydroxamates are isolated in good to high yields and purities by simple evaporation of the volatile solvents, after treatment of the crude reaction mixture with sequestering
Rhodium-Catalyzed CH Alkynylation of Arenes at Room Temperature
作者:Chao Feng、Teck-Peng Loh
DOI:10.1002/anie.201309198
日期:2014.3.3
The rhodium(III)‐catalyzed ortho CH alkynylation of non‐electronically activated arenes is disclosed. This process features a straightforward and highly effective protocol for the synthesis of functionalized alkynes and represents the first example of merging a hypervalent iodine reagent with rhodium(III) catalysis. Notably, this reaction proceeds at room temperature, tolerates a variety of functional