529-20-4Relevant articles and documents
Chromium trioxide supported onto wet silica gel: Rapid oxidation of alcohols to carbonyl compounds under microwave irradiation in solventless system
Heravi, Majid M.,Farhangi, Nasrin,Beheshtiha, Yahya Sh.,Assadolah, Karim,Ghassemzadeh, Mitra,Tabar-Hydar, Koroush
, p. 2883 - 2885 (2002)
In an environmentally benign system, alcohols are rapidly oxidized to carbonyl compounds using CrO3 supported onto wet silica gel as an oxidant under microwave irradiation.
Synthesis of Oxetans by Photocycloaddition of Aromatic Aldehydes to Hexamethyl(Dewar benzene)
Carless, Howard A. J.,Trivedi, Harish S.
, p. 950 - 951 (1981)
U.v. irradiation of the aldehydes (3) in the presence of hexamethyl(Dewar benzene) yields the tricyclic oxetans (4) and (5) in competition with hexamethylbenzene formation.
Palladium-Catalyzed ortho C?H Arylation of Benzaldehydes Using ortho-Sulfinyl Aniline as Transient Auxiliary
Mu, Delong,He, Gang,Chen, Gong
, p. 2423 - 2426 (2018)
A PdII-catalyzed ortho-(Csp2)–H arylation reaction of benzaldehydes using a catalytic amount of 2-(methylsulfinyl)aniline as transient auxiliary was developed. This reaction is compatible with a broad range of benzaldehyde and aryl iodide substrates. Compared with other related reaction systems, an excellent regioselectivity for ortho-C(sp2)?H bonds over benzylic C(sp3)?H bonds was obtained for ortho-alkyl-benzaldehyde substrates.
ULTRASOUND IN ORGANIC SYNTHESIS 10. SELECTIVE ORTHO-LITHIATION OF THE BOUVEAULT REACTION INTERMEDIATE
Einhorn, J.,Luche, J. L.
, p. 1793 - 1796 (1986)
The Bouveault reaction intermadiate prepared under sonochemical conditions easily undergoes orthodirected lithiation.The use of tetrahydropyran as a solvent dramatically increases the rates and yields of metallation which can be accomplished with an in situ generated alkyl-lithium.
Oxidation of o-Xylene to Phthalic Anhydride over V2O5/TiO2 Catalysts. I. Influence of Catalyst Composition, Preparation Method and Operating Conditions on Conversion and Product Selectivities
Dias, Cristina R.,Portela, M. Farinha,Bond, Geoffrey C.
, p. 344 - 352 (1995)
The oxidation of o-xylene and of o-tolualdehyde over V2O5/TiO2 (anatase) catalysts has been studied at 533-633 K under steady state conditions; catalysts were prepared either by wet impregnation employing NH4VO3 solution or by a grafting technique with VO(O-i-C4H9)3.At lower temperatures and lower contact times, for both o-xylene and o-tolualdehyde, part of the reactant feed disappeared due to the formation of an involatile polymeric residue, the formation of which was enhanced at lower temperatures, lower contact times, and higher organic reactant concentrations.At lower contact times, the part of the residue deposited on the catalyst surface constituted an important CO2 source.The catalyst prepared by grafting showed higher phthalic anhydride selectivity and less of the residue.The formation of nonselective oxidation products seems to be favoured by uncoated TiO2 since 0.6percent V2O5/TiO2 showed higher CO2 selectivity than other catalysts.Crystalline V2O5 caused greater residue formation.
Confining task-specific ionic liquid in silica-gel matrix by sol-gel technique: A highly efficient catalyst for oxidation of alcohol with molecular oxygen
Liu, Lin,Ma, Juanjuan,Xia, Jiyin,Li, Luodan,Li, Chunlong,Zhang, Xiaobo,Gong, Junyan,Tong, Zhiwei
, p. 323 - 326 (2011)
A novel catalytic system was developed through confinement of TEMPO task-specific ionic liquid (TEMPO-IL) with CuCl2 in a silica-gel matrix by sol-gel technique. The obtained TEMPO-IL/CuCl2/silica-gel catalytic system was effective f
Method for generating benzaldehyde by catalyzing alpha-monosubstituted styrene to be oxidized by N-hydroxyphthalimide
-
Paragraph 0060-0062, (2021/01/24)
The invention discloses a method for generating benzaldehyde by catalyzing alpha-mono-substituted styrene to be oxidized through N-hydroxyphthalimide. According to the method, N-hydroxyphthalimide isused as a catalyst, oxygen is used as an oxidizing agent, and an alpha mono-substituted styrene compound is oxidized in an organic solvent to obtain the benzaldehyde derivative. The method has the advantages of simple reaction operation, low cost, mild conditions, high yield, no heavy metal pollution and the like.
Aryl aldiketone and synthesis method thereof
-
Paragraph 0018, (2021/09/26)
The invention discloses an aryl aldehyde ketone and a synthesis method thereof, wherein an aryl aldehyde is synthesized from cheap olefin as a raw material. A commercially available inexpensive olefin is used as a raw material, ether is used as an additive, molecular oxygen serves as a sole oxidizing agent, water is used as a solvent, and the aldehyde and ketone are synthesized by column chromatography under a photocatalytic condition. The invention has the advantages of mild reaction conditions, green and environmental protection, simple experimental operation, good reaction selectivity, high product yield and the like.
Method for preparing aldehyde compounds by oxidative cleavage of carbon-carbon bonds of terminal alkene compounds
-
Paragraph 0037-0038; 0089-0090, (2021/06/06)
The invention discloses a method for preparing aldehyde compounds by oxidizing and breaking carbon-carbon bonds of terminal alkene compounds. The method comprises the following steps: adding an alkene-terminated compound, an additive and a nitrogen-doped mesoporous carbon-loaded monatomic catalyst into a fatty primary alcohol solvent, putting into a pressure container, sealing, introducing oxygen source gas with a certain pressure, controlling the pressure of the oxygen source gas to be 0.1-1MPa and the reaction temperature to be 80-150 DEG C, and obtaining a reaction product, namely the aldehyde compound. The nitrogen-doped mesoporous carbon-loaded monatomic catalyst adopted by the invention is high in activity, the highest separation yield of the aldehyde compound as a reaction product reaches 99%, the method is wide in application range, the reaction conditions are easy to control, the catalyst can be recycled, the post-treatment is simple, and the method is suitable for industrial production.
