Oxidization catalyst for alkylbenzene and method for producing aromatic aldehyde
申请人:NIPPON SHOKUBAI CO., LTD.
公开号:US20020188159A1
公开(公告)日:2002-12-12
The present invention provide a catalyst capable of producing an aromatic aldehyde by gas-phase oxidation of the corresponding alkylbenzene in the presence of a molecular oxygen in high yield, and a method of producing an aromatic aldehyde from the corresponding alkylbenzene in high yield by using the above catalyst.
An alkylbenzene oxidation catalyst for the production of an aromatic aldehyde by gas-phase oxidation of the corresponding alkylbenzene in the presence of a molecular oxygen,
which comprises tungsten and antimony plus an oxide of at least one metal species selected from the group consisting of niobium, tantalum, zirconium, and titanium or a composite oxide of two or more metal species selected from said group.
Preparation and Palladium Complex Formation of Several (2-Phosphaethenyl)benzenes
作者:Hajime Kawanami、Kozo Toyota、Masaaki Yoshifuji
DOI:10.1246/cl.1996.533
日期:1996.7
Phenylphosphaethenes carrying two to four phosphoruscarbon double bonds on a benzene ring were prepared and their palladium complex formations were studied. The palladium complexes reacted with alkyllithium reagents to give the corresponding o-alkylation products.
Supramolecular Ladders from Dimeric Cucurbit[6]uril
作者:James B. Wittenberg、Peter Y. Zavalij、Lyle Isaacs
DOI:10.1002/anie.201300404
日期:2013.3.25
Climbing the cucurbitladder: Cucurbit[6]uril dimers (connected gray cylinders; see scheme) were prepared by condensation of glycoluril hexamer with the appropriate tetraaldehydes. The self‐assembly process between these dimers and oligoviologen compounds (blue) in water leads to a supramolecularladder with the dimensions and molecular weight typical of small proteins.
1,2,4,5-Tetravinylbenzene (5) is obtained by four-fold Wittig reaction of tetraformylbenzene (4) and methyltriphenylphosphonium bromide.
四甲酰基苯(4)与甲基三苯基溴化鏻经四次Wittig反应得到1,2,4,5-四乙烯基苯(5)。
Catalyst for partial oxidation of methylbenzenes and method for producing aromatic aldehydes using the same
申请人:Lee Won-ho
公开号:US20060094906A1
公开(公告)日:2006-05-04
Provided is a catalyst for partial oxidation of methylbenzenes comprising the compound represented by the following formula 1 and, optionally, a fire-resistant inorganic support:
WO
x
(1)
where W stands for a tungsten atom, O stands for an oxygen atom and x is a number determined by the oxidation state of W. Also provided is a method for producing aromatic aldehydes from partial oxidation of methylbenzenes in gas phase using molecular oxygen using the afore-mentioned catalyst. The catalyst of the present invention can be prepared easily compared with conventional multi-component oxide catalysts. And, aromatic aldehydes can be produced from methylbenzenes with high selectivity and yield.