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.
Electrochemical Synthesis of
<i>O</i>
‐Phthalimide Oximes from
<i>α</i>
‐Azido Styrenes
<i>via</i>
Radical Sequence: Generation, Addition and Recombination of Imide‐
<i>N</i>
‐Oxyl and Iminyl Radicals with C−O/N−O Bonds Formation
作者:Stanislav A. Paveliev、Artem I. Churakov、Liliya S. Alimkhanova、Oleg O. Segida、Gennady I. Nikishin、Alexander O. Terent'ev
DOI:10.1002/adsc.202000618
日期:2020.9.21
Electrochemically induced radical‐initiated reaction of vinyl azides with N‐hydroxyphthalimide resulting O‐phthalimide oximes with challenging for organic chemistry N−O‐N fragment has been discovered. The developed approach introduces in synthesis electrochemically generated O‐centered imide‐N‐oxyl radicals as the coupling components. Sequential formation of C−O and N−O bonds was achieved via generation
Cerium(IV) ammonium nitrate promoted synthesis of O-phthalimide oximes from vinyl azides and N-hydroxyphthalimide
作者:Stanislav A. Paveliev、Liliya S. Alimkhanova、Anna V. Sergeeva、Alexander O. Terent'ev
DOI:10.1016/j.tetlet.2020.152533
日期:2020.11
O-Phthalimide oximes with an NON fragment were synthesized in high yields via the reaction of vinyl azides with phthalimide-N-oxyl radicals derived from N-hydroxyphthalimide under the action of cerium(IV) ammonium nitrate. The disclosed process is based on the radical transformation of vinyl azides with the elimination of nitrogen and the formation of iminyl N-radicals. The developed approach exploited
[1+1+3] Annulation of Diazoenals and Vinyl Azides: Direct Synthesis of Functionalized 1‐Pyrrolines through Olefination
作者:Vinaykumar Kanchupalli、Sreenivas Katukojvala
DOI:10.1002/anie.201801976
日期:2018.5.4
A dirhodium carboxylate catalyzed [1+1+3] annulation reaction of diazoenals and vinyl azides that gives synthetically important enal‐functionalized 1‐pyrroline derivatives was developed. The reaction involves a novel rhodium‐catalyzed olefination of diazoenals with vinyl azides via electrophilic enal carbenoids, resulting in a new class of enal acrylates. The annulation reaction was used for the direct
A novel, facile and efficient strategy for the one-pot synthesis of β-ketosulfones from readily available sulfonyl chloride, hydrazine hydrate and vinyl azides is described. The reaction proceeded very smoothly affording diverse β-ketosulfones in moderate to good yields. This new procedure has the advantages of environmental benign, easy and simple operation, low cost and wide tolerance of functional