1033-71-2Relevant academic research and scientific papers
Facile, product-selective reduction of azoxyarenes into azoarenes or hydrazoarenes by aluminium/hydrazine hydrate
Nanjundaswamy,Pasha
, p. 2163 - 2168 (2005)
Azoxyarenes, on treatment with hydrazine hydrate in presence of aluminium powder in methanol, undergo reduction. The reactions have been carried under microwave irradiation as well at reflux to get the corresponding hydrazoarenes and azoarenes as reduced products. The reaction is very fast, which gives excellent yield of the product. Substituents such as OCH3, OC 2H5, and Cl are unaffected. Copyright Taylor & Francis, Inc.
Synthetic method for 4,4'-dihalogenated-3,3'-dialkyl(alkoxyl) biphenyl compounds
-
Paragraph 0065; 0066; 0067; 0068, (2016/10/07)
The invention relates to a synthetic method for 4,4'-dihalogenated-3,3'-dialkyl(alkoxyl) biphenyl compounds. The method employs o-nitro alkyl (alkoxyl) benzene as an initial raw material, 2,2'-dialkyl(alkoxyl) hydrazobenzene is prepared through catalysis hydrogenation in an alkaline environment, hydrochloric acid acidifying rearrangement is carried out, 4,4'-diamino-3,3'-dialkyl(alkoxyl) biphenyl is prepared, finally, a diazotization reaction is carried out and 4,4'-dihalogenated-3,3'-dialkyl(alkoxyl) biphenyl compounds are prepared. The synthetic method is advantaged by cheap and easily available raw materials, mild reaction conditions, simple operation, high safety coefficient, high yield and low cost.
Mg/Triethylammonium formate: A useful system for reductive dimerization of araldehydes into pinacols; Nitroarenes into azoarenes and azoarenes into hydrazoarenes
Pamar, M. Geeta,Govender,Muthusamy,Krause, Ruiw M.,Nanjundaswamy
, p. 969 - 974 (2014/03/21)
Studies are reported which describes the effectiveness of triethylammonium formate in the presence of magnesium for the efficient intermolecular pinacol coupling using MeOH as solvent, Various aromatic carbonyls underwent smooth reductive coupling to give the corresponding I ,2-diols. A series of azo compounds were obtained by the reductive coupling of nitroaromatics while azo compounds were reduced to the corresponding hydrazoarenes by this system. There was no adverse effect on the other reducible and hydrogenolysable groups such as ether linkage, hydroxy and halogens. The reactions are clean, high yielding and inexpensive. All the reactions proceeded smoothly at ambient temperature.
An efficient and product selective reduction of azoxyarenes into azoarenes or hydrazoarenes by tin/hydrazine hydrate
Nanjundaswamy,Pasha
, p. 1086 - 1089 (2007/10/03)
A general and rapid method is described for the reduction of azoxyarenes to give the corresponding hydrazoarenes under microwave irradiation and azoarenes at reflux conditions on treatment with hydrazine hydrate in the presence of tin metal in methanol. The reactions are found to be fast and clean, give excellent yield and high purity of the products. Ether linkage and Cl are unaffected.
A facile reduction of azoxyarenes with hydrazine hydrate/magnesium: Formation of different products under different reaction conditions
Nanjundaswamy, Hemmaragala M.,Pasha, Mohamed A.
, p. 772 - 774 (2007/10/03)
Azoxyarenes on treatment with hydrazine hydrate in presence of magnesium turnings in methanol undergo reduction. The reactions have been carried under microwave irradiation as well as at reflux to give the corresponding hydrazoarenes and azoarenes as reduced products. The reactions are very fast and give excellent yields of the products. Substituents like OCH3, OC2H5 and Cl are unaffected.
