21564-91-0

Usage

Uses

1. Used as a Precursor in Chemical Synthesis:
1,5-Dimethyl-1,2,3,4-tetrahydronaphthalene is used as a precursor for the preparation of 2,6-naphthalenedicarboxylic acid, which is an important intermediate in the production of various chemicals and materials.
2. Used in Chemical Industry:
In the chemical industry, 1,5-Dimethyltetralin (1,5-DMT) can be utilized as a building block for synthesizing a range of compounds, including pharmaceuticals, dyes, and other specialty chemicals. Its unique structure allows for further functionalization and modification to create a variety of products.
3. Used in Research and Development:
1,5-Dimethyl-1,2,3,4-tetrahydronaphthalene can be employed in research and development for exploring new chemical reactions, understanding reaction mechanisms, and developing novel synthetic routes for the production of complex organic molecules.
4. Used in Analytical Chemistry:
As a reference compound or a standard, 1,5-Dimethyltetralin (1,5-DMT) can be used in analytical chemistry for the calibration of instruments, validation of analytical methods, and the determination of physical and chemical properties of related compounds.

Synthesis Reference(s)

Canadian Journal of Chemistry, 47, p. 2837, 1969 DOI: 10.1139/v69-470

InChI:InChI=1/C12H16/c1-9-5-3-8-12-10(2)6-4-7-11(9)12/h3,5,8,10H,4,6-7H2,1-2H3

Upstream product

• 73178-44-6 1-(2-methylphenyl)-1-pentanol 
• 571-61-9 1,5-dimethylnaphthalene 
• 868748-02-1 3-methyl-4-(p-tolyl)butanal 
• 42946-77-0 5-ortho-tolylpentene 
• 529-20-4 2-methylphenyl aldehyde 

Downstream Products

• 571-61-9 1,5-dimethylnaphthalene 
• 575-43-9 1,6-dimethylnaphthalene 
• 581-42-0 2.6-dimethylnaphthalene 

Relevant academic research and scientific papers

Synthesis of nickel-tungsten sulfide hydrodearomatization catalysts by the decomposition of oil-soluble precursors

Nickel-tungsten sulfide catalysts for the hydrogenation of aromatic hydrocarbons have been prepared by the in situ decomposition of an oil-soluble tungsten hexacarbonyl precursor in a hydrocarbon feedstock using oil-soluble nickel salt nickel(II) 2-ethylhexanoate as a source of nickel. The in situ synthesized Ni-W-S catalyst has been characterized by X-ray photoelectron spectroscopy. The activity of the resulting catalysts has been studied in the hydrogenation of bicyclic aromatic hydrocarbons and dibenzothiophene conversion in a batch reactor at a temperature of 350°C and a hydrogen pressure of 5.0 MPa. It has been shown that the optimum W: Ni molar ratio is 1: 2. Using the example of the hydrofining of feedstock with high sulfur and aromatics contents, it has been shown that the synthesized catalyst exhibits high activity in the hydrogenation of aromatic hydrocarbons.

Nickel-tungsten sulfide aromatic hydrocarbon hydrogenation catalysts synthesized in situ in a hydrocarbon medium

Nickel-tungsten sulfide nanocatalysts for the hydrogenation of aromatic hydrocarbons (HCs) have been prepared by the in situ decomposition of a nickel thiotungstate precursor in a HC feedstock using 1-butyl-1-methylpiperidinium nickel thiotungstate complex [BMPip]2Ni[WS4]2 as the precursor. The in situ synthesized particles have been characterized by X-ray photoelectron spectroscopy and high-resolution transmission electron microscopy. It has been shown that the resulting Ni-W-S particles are nanoplates associated in multilayer agglomerates; the average length of the Ni-W-S particles is 6 nm; the average number of layers in the multilayer packaging is three. The catalytic activity of the synthesized catalysts has been studied in the hydrogenation of model mixtures of mono- and bicyclic aromatic HCs and in the conversion of dibenzothiophene in a batch reactor at a temperature of 350°C and a hydrogen pressure of 5.0 MPa. It has been shown that the studied catalysts can be used for the hydrofining of light cycle oil.

Dehydrogenation process of dimethylnaphthalene using metal catalyst

Disclosed herein is a process of producing high purity and high yield dimethylnaphthalene by dehydrogenating a dimethyltetralin isomer using a metal catalyst for dehydrogenation. The metal catalyst contains a carrier selected from alumina (Al2O3), silica (SiO2), a silica-alumina mixture and zeolite. The metal catalyst also contains 0.05 to 2.5% by weight of platinum (Pt), 0.1 to 3.0% by weight of tin (Sn) or indium (In), 0.5 to 15.0% by weight of at least one selected from the group consisting of potassium (K), magnesium (Mg) and cesium (Cs), 0.3 to 3.0% by weight of chlorine, and 0.01 to 3.0 % by weight of zinc (Zn) or gallium (Ga) as active components based on an element weight of the final catalyst.

NOVEL PROCESS FOR PREPARATION OF 2,6-DIALKYLNAPHTHALENE

The present invention relates to a novel method for preparing 2,6-dialkylnaphthalene with high selectivity and high yield using entirely novel starting materials through alkylation and cyclodehydration without necessitating separation or purification of isomers, which has been a problem of the conventional method, and particularly to a method comprising the steps of (a) preparing an intermediate by alkylating an aromatic compound with an alkene compound in an equivalent ratio in the presence of a catalyst and (b) preparing 2,6-dialkylnaphthalene through cyclodehydration of the intermediate.

Preparation method of 1,5-dimethyltetralin using dealuminated zeolite beta catalyst

The present invention relates to a method for preparing 1,5-dimethyltetralin using a dealuminated zeolite beta catalyst. The preparation method of 1,5-dimethyltetralin according to the present invention has the effects of not only showing high conversion and high selectivity of 1,5-dimethyltetralin but also of suppressing deactivation of a zeolite beta catalyst so as to enhance the catalyst life, by using the dealuminated zeolite beta catalyst.

Preparation method of 1,5-dimethyltetralin using dealuminated zeolite beta catalyst

The present invention relates to a method for preparing 1,5 - dimethyltetralin using a dealuminated zeolite beta catalyst. The preparation method of 1,5-dimethyltetralin according to the present invention has the effects of not only showing high conversion and high selectivity of 1,5-dimethyltetralin but also of suppressing deactivation of a zeolite beta catalyst so as to enhance the catalyst life, by using the dealuminated zeolite beta catalyst.

PREPARATION METHOD OF 1,5-DIMETHYLTETRALIN

The present invention provides a method for preparing 1,5-dimethyltetralin by cyclization of 5-ortho-tolylpentene in the presence of a zeolite beta catalyst in which the mole ratio of SiO2/Al2O3 exceeds 30.0 and said zeolite beta is preferably in the form of pellets. The conventional cyclization of 5-ortho-tolylpentene by using a catalyst such as a mordenite, zeolite X, zeolite Y and ultrastable zeolite Y has low selectivity for 1,5-dimethyltetralin and low yield since the cyclization reaction produces a lot of by-products such as dimethylnaphthalene isomers, dimethyltetralin isomers, dimers and polymers. The cyclization of 5-ortho-tolylpentene of the present invention can produce 1,5-dimethyltetralin with high selectivity and high yield by using a zeolite beta catalyst in which the mole ratio of SiO2/Al2O3 exceeds 30.0. Furthermore, the present invention can provide a preparing method for 1,5-dimethyltetralin with immediate industrial applicability by using the pellet form catalyst of the zeolite beta.

Characterization of New Methyl-Substituted Tetralins and Indans by 13C NMR Spectroscopy

In order to perform the analysis of the components contained in fossil fuels, carbon assignments of new methylated derivatives of tetralin and indan were obtained.Their chemical shifts were calculated by applying additivity rules. - Keywords: NMR; 13C NMR; tetralins; indans

Process for producing alkenylbenzene

In a process for producing an alkenylbenzene by the reaction of an alkylbenzene having 8 or more carbon atoms and a conjugated diolefin, the improvement in which the reaction is performed in the presence of a catalyst obtained by dispersing (a) an alkali metal and (b) potassium carbonate and/or potassium hydroxide in the presence of (c) an aromatic hydrocarbon having at least a substituent with a double bond.

Process for producing alkenylbenzene

In a process for producing an alkenylbenzene by the reaction of an alkylbenzene having 8 or more carbon atoms and a conjugated diolefin, the improvement in which the reaction is performed in the presence of a catalyst obtained by dispersing (a) an alkali metal and (b) potassium carbonate and/or potassium hydroxide in the presence of (c) an aromatic hydrocarbon having at least a substituent with a double bond.