Carbon Black as an Electron-transfer Catalyst. The Two-phase Dehydrogenation of Hydrazo Nitriles by an Aqueous Solution of Potassium Hexacyanoferrate(III), Using Carbon Black as the Catalyst
作者:Norio Tsubokawa、Naoki Tareda、Yasuo Sone
DOI:10.1246/bcsj.55.3541
日期:1982.11
solution of potassium hexacyanoferrate(III), usingcarbonblack as the catalyst, was carried out at 40 °C with shaking. In the presence of carbonblack, the two-phase dehydrogenation of hydrazo nitriles was accelerated, and the corresponding azo nitriles were obtained in good yields. The catalytic activity of channel blacks was larger than that of furnace blacks. Moreover, the increasing content of phenolic
以碳黑为催化剂,在 40 °C 振荡条件下,通过六氰基高铁酸钾 (III) 的水溶液对偶氮腈进行两相(水相和有机相)脱氢。在炭黑的存在下,加速了偶氮腈的两相脱氢,并以良好的收率获得了相应的偶氮腈。槽黑的催化活性大于炉黑。此外,酚羟基含量的增加倾向于增加炭黑的催化活性。很明显,炭黑表面的酚羟基在两相脱氢中充当电子转移催化剂。反应方案被认为如下。在水相中,
METHOD OF SYNTHESIS OF AZO COMPOUNDS
申请人:Arkema France
公开号:US20150011738A1
公开(公告)日:2015-01-08
A process is provided for synthesizing an azo compound, such as AIBN, by oxidation of a hydrazo compound using hydrogen peroxide. This process comprises a step of adding to the reaction medium a particular reducing agent, such as hydrazine.
A process for synthesizing an azo compound by oxidation of a hydrogen compound in the presence of a catalyst and a compound of formula (I) is described in which R
1
, R
2
and R
3
(R
1
)(R
2
)C(PO
3
(R
3
)
2
)
2
(I)
are as defined. The use of a compound of formula (I) as complexing agent for a catalyst is also described.
An azoimino ether, which is an intermediate for preparing polymerization initiators, can be produced by reacting a hydrazonitrile having a hydrazo group and at least one cyano group in the molecule with chlorine in the presence of a primary alcohol, preferably in a non-aqueous organic solvent.
La présente invention se rapporte à un procédé de synthèse d'un composé azo, tel que l'AIBN, par oxydation d'un composé hydrazo à l'aide de peroxyde d'hydrogène. Ce procédé comprend une étape d'ajout au milieu réactionnel d'un agent réducteur particulier, tel que l'hydrazine.