Oxidation of Secondary Amines with NiSO<sub>4</sub>-K<sub>2</sub>S<sub>2</sub>O<sub>8</sub>
作者:Shigekazu Yamazaki
DOI:10.1246/cl.1992.823
日期:1992.5
catalytic system consisting of NiSO4 and K2S2O8 has been found to be effective for the oxidation of secondaryamines to imines. 1,2,3,4-Tetrahydroisoquinoline was oxidized to 3,4-dihydroisoquinoline as the main product with a small amount of isoquinoline. N-Benzylaniline gave N-benzylideneaniline and a N-Ncoupling dimer.
Reduction of hydrazines to amines with aqueous solution of titanium(iii) trichloride
作者:Yan Zhang、Qiang Tang、Meiming Luo
DOI:10.1039/c1ob05328k
日期:——
cleavage in hydrazines is widely used in the preparation of amines and thus occupies a significant place in organic synthesis. In this paper, we report a new method for the reductive cleavage of N–N bonds in hydrazines by commercially available and cheap aqueous titanium(III) trichloride. The reaction proceeds smoothly under a broad pH range from acidic to neutral and basic conditions to afford amines in good
Substituent effect on torsional barriers in N,N′-dibenzylhydrazobenzenes.
作者:Daniel Kost、Zeev Roth
DOI:10.1016/s0040-4039(00)85669-5
日期:1982.1
Substituted hydrazobenzenes were prepared and their barriers to rotation measured by DNMR spectroscopy and correlated with σ⋯ substituent constants with a reaction constant ϱ300 = −1.09.