A New Method for N−N Bond Cleavage of N,N-Disubstituted Hydrazines to Secondary Amines and Direct Ortho Amination of Naphthol and Its Analogues
作者:Qiang Tang、Chao Zhang、Meiming Luo
DOI:10.1021/ja711153b
日期:2008.5.1
An unexpected reaction of N,N-disubstitutedhydrazine with naphthol and its analogues under simply thermal conditions has been disclosed. 2-Naphthol reacted with various N,N-disubstitutedhydrazines under argon to afford 1-amino-2-naphthol and the corresponding secondary amines in excellent yields. Ortho amination of 2-naphthols, hydroxyquinoline, and naphthalenamine occurred when they reacted with
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