Efficient Reductive Deoximation by Tungsten(VI) Chloride (WCl<sub>6</sub>) or Molybdenum(V) Chloride (MoCl<sub>5</sub>) in the Presence of Zn Powder in CH<sub>3</sub>CN
作者:Habib Firouzabadi、Arezu Jamalian、Babak Karimi
DOI:10.1246/bcsj.75.1761
日期:2002.8
Tungsten(VI) chloride (WCl6) or molybdenum(V) chloride (MoCl5) in the presence of zinc powder in CH3CN provides an efficient and facile procedure for the deprotection of oximes to their corresponding aldehydes and ketones in high yields.
Ruthenium-Catalyzed Rearrangement of Aldoximes to Primary Amides in Water
作者:Rocío García-Álvarez、Alba E. Díaz-Álvarez、Javier Borge、Pascale Crochet、Victorio Cadierno
DOI:10.1021/om3006917
日期:2012.9.10
The rearrangement of aldoximes to primaryamides has been studied using the readily available arene-ruthenium(II) complex [RuCl2(η6-C6Me6)P(NMe2)3}] (5 mol %) as catalyst. Reactions proceeded cleanly in pure water at 100 °C without the assistance of any cocatalyst, affording the desired amides in high yields (70–90%) after short reaction times (1–7 h). The process was operative with both aromatic
from substituted aldoximes (mixture of E and Z) and alkynes, using alkyl nitrites under conventional heating conditions. The key nitrile oxide intermediates that are required for the synthesis of isoxazoles are formed by treatment of substituted aldoxime with either tert-butyl nitrite or isoamyl nitrite. The generated nitrile oxides underwent in situ [3+2] dipolar cycloaddition to the substituted alkynes
An Efficient Synthesis of Nitriles from Aldoximes in the Presence of Trifluoromethanesulfonic Anhydride in Mild Conditions
作者:N. Uludag
DOI:10.1134/s1070428020090225
日期:2020.9
Abstract A new and convenient protocol has been proposed for the transformation of aldoximes to nitriles using trifluoromethanesulfonic anhydride and triethylamine. The proposed method allows a range of aldoximes, including aromatic, heterocyclic, aliphatic, and cycloaliphatic aldoximes, to be converted to the corresponding nitriles in good to excellent yields.
We have developed a chiral bisguanidinium salt catalyzed dynamic kinetic resolution of azlactones with oximes. A variety of chiral N-acyl amino acid oxime esters were generated with up to 97% ee and 99% yield. The products are useful in peptidesynthesis.