Regiospecific Rearrangement of Hydroxylamines to Secondary Amines Using Diisobutylaluminum Hydride
摘要:
A systematic investigation of a reductive ring-expansion reaction of N-monosubstituted hydroxylamines with diisobutylaluminum hydride (DIBALH) was carried out. The reaction regiospecifically provided a variety of bicyclic or tricyclic heterocycles or linear secondary amines containing nitrogen attached to an aromatic ring.
Electron-Withdrawing β-Substituent, Ring-Strain, and Ortho Effects on Reactivity, Selectivity, and Stability of <i>o</i>-Alkoxybenzyl Carbocations
作者:Meng-Yun Tseng、Hsin-Yi Hung、Kuangsen Sung
DOI:10.1021/acs.jpca.5b02234
日期:2015.4.30
o-Alkoxybenzyl carbocations 1 and 2 were generated by laser flashphotolysis of the corresponding o-alkoxybenzyl alcohols 3 and 4 to understand how the electron-withdrawing β-substituent, the ring-strain, and the ortho effects affect the reactivity (electrophilicity), selectivity, and stability of 1 and 2, and to fit the electrophilicity of 1 and 2 into the current carbocationelectrophilicity scale (E)
Metal-Free 2,2,6,6-Tetramethylpiperidin-1-yloxy Radical (TEMPO) Catalyzed Aerobic Oxidation of Hydroxylamines and Alkoxyamines to Oximes and Oxime Ethers
作者:Sebastian Wertz、Armido Studer
DOI:10.1002/hlca.201200175
日期:2012.10
TEMPO‐Mediatedoxidation of hydroxylamines (=hydroxyamines) and alkoxyamines to the corresponding oxime derivatives is reported (TEMPO=2,2,6,6‐tetramethylpiperidin‐1‐yloxy radical; Scheme 2). These environmentally benign oxidations proceed in good to excellent yields (Table 1). For alkoxyamines, oxidation to the corresponding oxime ethers can be performed by using dioxygen as a terminal oxidant in
A systematic investigation of a reductive ring-expansion reaction of N-monosubstituted hydroxylamines with diisobutylaluminum hydride (DIBALH) was carried out. The reaction regiospecifically provided a variety of bicyclic or tricyclic heterocycles or linear secondary amines containing nitrogen attached to an aromatic ring.