α-<i>N</i>-Heteroarylation and α-Azidation of Ketones via Enolonium Species
作者:Atul A. More、Gulab K. Pathe、Keshaba N. Parida、Shimon Maksymenko、Yuriy B. Lipisa、Alex M. Szpilman
DOI:10.1021/acs.joc.7b03058
日期:2018.2.16
Enolonium species, resulting from the umpolung of ketone enolates by Koser’s hypervalentiodinereagents activated by boron trifluoride, react with a variety of nitrogen heterocycles to form α-aminated ketones. The reactions are mild and complete in 4–5 h. Additionally, α-azidation of the enolonium species takes place using trimethylsilyl azide as a convenient source of azide nucleophile.
Electrochemical Aerobic Oxygenation and Nitrogenation of Cyclic Alkenes via C═C Bond Cleavage or Oxygenation and Azidation of Open-Chain Alkenes
作者:Yan Zhu、Cong Jiang、Heng Li、Ping Liu、Peipei Sun
DOI:10.1021/acs.joc.2c01293
日期:2022.8.19
electrochemical C═C double-bond cleavage and functionalization of cyclic alkenes for the synthesis of ketonitriles is described. This transformation features environmentally friendly conditions and utilizes relatively safe TMSN3 as the nitrogenation reagent and molecular oxygen as the oxidant. For the open-chain alkenes, the reaction gave 1,2-difunctionalized products. A wide range of cyclic alkenes and open-chain
Several vicinal azidoalcohols were prepared in good to high yield and purity, starting from aryl α-haloketones, usingreagents supported on a macroporous ion exchange resin. This is a fast and new approach to aryl azidoalcohols.
In the present study, a series of dibenzoazepine triazole derivatives (24-39)
were synthesized and evaluated for their in vitro bioactivities including antiglycation,
antibacterial, DPPH radical scavenging, urease inhibition, antileishmanial and immunomodulatory
activities. The compounds were found to be moderately active only
against leishmania. Within this series, compound 26 was found to be the most active
antileishaminals with IC50 value 37.4 ± 0.4 µM. Structure-activity relationships for
this novel class are discussed.