Synthesis of α-Fluoroketones from Vinyl Azides and Mechanism Interrogation
作者:Shu-Wei Wu、Feng Liu
DOI:10.1021/acs.orglett.6b01691
日期:2016.8.5
An efficient and mild fluorination of vinylazides for the synthesis of α-fluoroketones is described. The mechanistic studies indicated that a single-electron transfer (SET) and a subsequent fluorine atom transfer process could be involved in the reaction.
The Iridium-catalyzed enantioselective couplingreaction of vinyl azides and allylic electrophiles is presented and provides access to β-chiral carbonyl derivatives. Vinyl azide are used as acetamide enolate or acetonitrile carbanion surrogates, leading to γ,δ-unsaturated β-substituted amides as well as nitriles with excellent enantiomeric excess. The products are readily transformed into chiral N-containing
An environmentally benign and efficient electrochemical synthesis of enaminones via a decarboxylativecoupling reaction of α-keto acids using n-Bu4NI as a redox catalyst and electrolyte under constant current electrolysis in an undivided cell is reported. A broad vinyl azide substrate scope and high functional group tolerance are observed. A gram-scale reaction further demonstrates the practicability
A sustainable strategy for the straightforward preparation of 2<i>H</i>-azirines and highly functionalized <i>NH</i>-aziridines from vinyl azides using a single solvent flow-batch approach
The reported flow-batch approach enables the easy preparation of 2H-azirines and their stereoselective transformation into highly functionalized NH-aziridines, starting from vinylazides and organolithium compounds. The protocol has been developed using cyclopentyl methyl ether (CPME) as an environmentally benign solvent, resulting into a sustainable, safe and potentially automatable method for the
Photoredox-catalysed redox-neutral trifluoromethylation of vinyl azides for the synthesis of α-trifluoromethylated ketones
作者:Hai-Tao Qin、Shu-Wei Wu、Jia-Li Liu、Feng Liu
DOI:10.1039/c6cc10035j
日期:——
A redox-neutral, mild, and simple protocol is developed for the synthesis of [small alpha]-trifluoromethylated ketonesfromvinyl azides under transition-metal-free conditions. In the presence of organic photoredox catalyst N-methyl-9-mesityl acridinium and...