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
Microwave Assisted Oxidation of Benzyl Halides to Aldehydes and Ketones with 4-Hydroxypyridinium Nitrate Functionalized Silica Gel in Aqueous Media
Ghalehbandi, Shermineh sadat,Ghazanfari, Dadkhoda,Ahmadi, Sayed Ali,Sheikhhosseini, Enayatollah
, p. 176 - 183 (2021/04/29)
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Selective oxidation of alkenes to carbonyls under mild conditions
Huo, Jie,Xiong, Daokai,Xu, Jun,Yue, Xiaoguang,Zhang, Pengfei,Zhang, Yilan
supporting information, p. 5549 - 5555 (2021/08/16)
Herein, a practical and sustainable method for the synthesis of aldehydes, ketones, and carboxylic acids from an inexpensive olefinic feedstock is described. This transformation features very sustainable and mild conditions and utilizes commercially available and inexpensive tetrahydrofuran as the additive, molecular oxygen as the sole oxidant and water as the solvent. A wide range of substituted alkenes were found to be compatible, providing the corresponding carbonyl compounds in moderate-to-good yields. The control experiments demonstrated that a radical mechanism is responsible for the oxidation reaction.
Hydroxyl radical-mediated oxidative cleavage of CC bonds and further esterification reaction by heterogeneous semiconductor photocatalysis
Hong, Mei,Jia, Rui,Miao, Hongyan,Ni, Bangqing,Niu, Tengfei,Wang, Hui
, p. 6591 - 6597 (2021/09/10)
A hydroxyl radical-mediated aerobic cleavage of alkenes and further sequence esterification reaction for the preparation of carbonyl compounds have been developed by using tubular carbon nitride (TCN) as a general heterogeneous photocatalyst under an oxygen atmosphere with visible light irradiation. This protocol has an excellent substrate scope and gives the desired aldehydes, ketones and esters in moderate to high yields. Importantly, this metal-free procedure employed photogenerated hydroxyl radicals in situ as green oxidation active species, avoiding the present additional initiators. The reaction could be carried out under solar light irradiation and was applicable to large-scale reactions. Furthermore, the recyclable TCN catalyst could be used several times without a significant loss of activities.