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
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
Copper-Catalyzed Phosphorylation of <i>N</i>,<i>N</i>-Disubstituted Hydrazines: Synthesis of Multisubstituted Phosphorylhydrazides as Potential Anticancer Agents
An efficient copper-catalyzed aerobic oxidative cross-dehydrogenative coupling reaction for the synthesis of multisubstituted phosphorylhydrazides from N,N-disubstituted hydrazines and hydrogen phosphoryl compounds is accomplished. The reaction proceeds under mild conditions without the addition of any external oxidants and bases. This work reported here represents a direct P(═O)–N–N bond formation
A facile access to benzo[d]thiazole-2(3H)-thiones and benzo[d]thiazol-2(3H)-ones has been developed through a temperature-controlled intermolecular [3 + 2] annulation of N,N-disubstituted arylhydrazines with CS2 in the presence of DMSO. This protocol can obviate the prefunctionalization of the starting materials. This direct C–S/C–N bond formation reaction was performed in the absence of any external
通过温度控制的 N,N 分子间 [3 + 2] 环化,开发了一种容易获得苯并[ d ]噻唑-2(3 H )-硫酮和苯并[ d ]噻唑-2(3 H )-酮的方法-在DMSO存在下用CS 2二取代的芳基肼。该协议可以避免起始材料的预功能化。这种直接的 C-S/C-N 键形成反应是在没有任何外部催化剂、过渡金属、碱、配体和氧化剂的情况下进行的,具有高步骤经济性。