4419-11-8Relevant articles and documents
METHOD FOR PRODUCING AZO COMPOUNDS
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Paragraph 0046, (2018/04/14)
PROBLEM TO BE SOLVED: To provide a method that can produce azo compounds at good yields by making oxygen or an oxygen-containing gas act on hydrazo compounds when oxidatively dehydrogenating them. SOLUTION: Azo compounds are produced by making oxygen or an oxygen-containing gas act on hydrazo compounds in the presence of nitrite compounds, bromine compounds and a solvent. SELECTED DRAWING: None COPYRIGHT: (C)2018,JPOandINPIT
METHOD FOR PRODUCING AZO COMPOUNDS
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Paragraph 0048; 0062, (2018/05/03)
PROBLEM TO BE SOLVED: To provide a method that can produce azo compounds at good yields by making oxygen or an oxygen-containing gas act on hydrazo groups of hydrazo compounds when oxidatively dehydrogenating them. SOLUTION: Azo compounds are produced by making oxygen or an oxygen-containing gas act on hydrazo compounds in the presence of vanadium or cerium compounds, and a solvent. SELECTED DRAWING: None COPYRIGHT: (C)2018,JPOandINPIT
Method for producing 2-(3-pyrazolyl-oxymethylene) nitrobenzenes
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, (2008/06/13)
PCT No. PCT/EP98/04490 Sec. 371 Date Jan. 27, 2000 Sec. 102(e) Date Jan. 27, 2000 PCT Filed Jul. 20, 1998 PCT Pub. No. WO99/06373 PCT Pub. Date Feb. 11, 19992-(3-Pyrazolyloxymethylene)nitrobenzene [sic] derivatives of the formula I where the substituents and indices have the meanings given in the description, are prepared by bromination of an o-nitrotoluene of the formula II and subsequent reaction with a 3-hydroxypyrazole of the formula IV
Hydrosilylation of unsaturated compounds
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, (2008/06/13)
A method for hydrosilylating an olefinically unsaturated compound comprising contacting the unsaturated compound with a source of silicon in the presence of an azo-containing free-radical catalyst, the hydrosilylated product being a useful crosslinking agent.
Ocular lens material
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, (2008/06/13)
An ocular lens material made of a copolymer consisting essentially of (A) a polysiloxane macromonomer having polymerizable groups bonded by one or more urethane bonds to the siloxane main chain and (B) an alkyl (meth)acrylamide, wherein the weight ratio of the polysiloxane macromonomer to the alkyl (meth)acrylamide ranges from 10:90 to 90:10.
A Stereospecific Synthesis of Azo Nitriles
Danek, Stefan K.,Kelly, David P.,Serelis, Algirdas K.,Steel, Peter J.
, p. 2911 - 2919 (2007/10/02)
A series of α,α'-dicyanoazoalkanes 2 have been prepared in high isolated yield (96-98percent) by treatment of the corresponding α,α'-dichloroazoalkanes 3 (generated from ketazines 1) with trimethyl cyanide and 50 molpercent stannic chloride at low temperature.Usa of 5 mol percent stannic chloride resulted in the formation of α-chloro-α'-cyanoazoalkanes 4.Single-crystal X-ray diffraction analysis of α,α'-dichloro-3,3,3',3'-tetramethyl-2,2'-azobutane (3a) and the 2-chloro-2'-cyano (4a) and the 2,2'-dicyano (2a) derivatives established that all three have the same relative configuration and thus the complete stereospecifity of the cyanation.The utility of the reaction was demonstrated by the successful synthesis of (2S,2'R,4S,4'S)-2,2'-dimethyl-4,4'-diphenyl-2,2'-azopentanenitrile (11, X = CN).
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.
Tsubokawa,Takeda,Sone
, p. 3541 - 3545 (2007/10/02)
The two-phase(aqueous and organic phase) dehydrogenation of hydrazo nitriles by an aqueous solution of potassium hexacyanoferrate(III), using carbon black as the catalyst, was carried out at 40 degree C with shaking. In the presence of carbon black, 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 hydroxyl groups tended to increase the catalytic activity of carbon blacks. It became apparent that phenolic hydroxyl groups on the surface of carbon black act as an electron-transfer catalyst in the two-phase dehydrogenation.
Process for preparing 2,2-azobis(2,4-dimethylpentanenitrile)
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, (2008/06/13)
A process for the preparation of 2,2'-azobis (2,4-dimethylpentanenitrile) with improved filtering and drying characteristics, said process comprising reacting 2-amino-2,4-dimethylpentanenitrile with a metal hypochlorite in the presence of water, a mixture of quaternary ammonium surface active compounds and ionic bromide wherein the equivalent ratio of ionic bromide to surface active compound is 0.4:1-12.0:1 at a temperature of about -10° C. to about 30° C., and recovering 2,2'-azobis(2,4-dimethylpentanenitrile) from the reaction mixture.
Process for the preparation of azo compounds from amino compounds in the presence of a phase transfer catalyst
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, (2008/06/13)
Azo compounds of the formula, STR1 wherein each of R1 and R2 is selected from the group consisting of (1) C1 -C8 aliphatic hydrocarbons unsubstituted or substituted with carboxyl, hydroxyl or alkoxy of the formula --OR4 in which R4 is a C1 -C4 aliphatic hydrocarbon, (2) C3 -C8 alicyclic hydrocarbons, (3) C6 -C10 aromatic hydrocarbons and (4) C4 -C12 alicyclic hydrocarbons formed by combining R1 and R2 together with the adjacent carbon atom, and R3 is selected from the group consisting of nitrile, esters of the formula --COOR4 in which R4 is a C1 -C4 aliphatic hydrocarbon, a carboxylate of the formula --COOM in which M is an alkali metal or alkaline earth metal, and a carboxylamido, which are useful as foaming agents or radical polymerization initiator, are prepared in a high yield by reacting a corresponding amino compound with a metal hypohalite or with an alkyl hypohalite in the presence of an alkali, using a phase transfer catalyst in a heterogeneous medium comprising water and organic solvent, the phase transfer catalyst being one member selected from the group consisting of organic quaternary ammonium salts, organic quaternary phosphonium salts and macrocyclic polyethers.
Process for the preparation of azodinitriles from aminonitriles in the presence of a surfactant
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, (2008/06/13)
The preparation of aliphatic azodinitriles by a process comprising reacting an alpha-aminonitrile selected from STR1 and mixtures thereof wherein R1, R2, R3 and R4 are selected from (1) hydrocarbyl radicals of 1 to 8 carbon atoms, (2) hydrocarbyl radicals of 1 to 8 carbon atoms substituted with carboxyl, hydroxyl or --OR wherein R is selected from a hydrocarbyl radical of 1 to 4 carbon atoms, (3) cyclohydrocarbyl radicals of 3 to 6 carbon atoms and (4) cyclohydrocarbyl radicals of 3 to 11 carbon atoms formed by combining R1 and R2 or R3 and R4 with 5 to 15% by weight based on the reaction mixture of a metal hypochlorite, M(OCl)x where M is selected from sodium, potassium or calcium and x is the valence of M, in an aqueous medium in the presence of 0.25 to 10% by weight, based on the weight of aminonitrile, of a surface active compound or mixtures thereof having an HLB of 8 to 35 at a temperature of -10° C to 30° C, said hypochlorite and alpha-aminonitrile being present in an equivalent ratio of 1:1 to 2:1 of hypochlorite to aminonitrile and recovering from the reaction mixture an aliphatic azodinitrile of the formula STR2
