4316-23-8

Usage

Chemical Properties

BEIGE CRYSTALLINE POWDER

InChI:InChI=1/C9H8O4/c1-5-2-3-6(8(10)11)7(4-5)9(12)13/h2-4H,1H3,(H,10,11)(H,12,13)/p-2

Upstream product

• 50919-63-6 diethyl 4-methyl-o-phthalate 
• 582-16-1 2,7-dimethylnaphthalene 
• 64-19-7 acetic acid 
• 581-42-0 2.6-dimethylnaphthalene 
• 141-78-6 ethyl acetate 
• 3425-89-6 4-methyl-1,2,3,6-tetrahydrophthalic anhydride 
• 201230-82-2 carbon monoxide 
• 99-04-7 m-Toluic acid 
• 99-94-5 p-Toluic acid 
• 20587-30-8 5-methyl-2-nitro-benzoic acid methyl ester 
• 18595-16-9 2-amino-5-methylbenzoic acid methyl ester 
• 2305-36-4 4-methylanthranilic acid 
• 18595-17-0 methyl 4-methylanthranilate 
• 26830-96-6 5-methyl-2-cyanoaniline 

Downstream Products

• 19438-61-0 4-methylphthalic anhydride 
• 40314-06-5 5-methyl-1H-isoindole-1,3-(2H)-dione 
• 90534-49-9 1,2-bishydroxymethyl-4-methylbenzene 
• 536711-05-4 4-bromomethyl-phthalic acid di-tert-butyl ester 

Relevant academic research and scientific papers

Unusual Effects of Acetate Ion on Photosensitized Oxygenation of Naphthalene Derivatives via Electron Transfer

The oxygenation of 2-methylnaphthalene photosensitized by 9,10-dicyanoanthracene in an O2-saturated acetonitrile gave phthalic acid and 4-methylphthalic acid in the presence of Et4NOAc or KOAc/18-crown-6, but different products in the presence of Et4NBF4 and KClO4 and without a salt.The photosensitized ring oxygenation also occured with naphthalene and 2,3-dimethylnaphthalene.

Dehydro-aromatization of cyclohexene-carboxylic acids by sulfuric acid: Critical route for bio-based terephthalic acid synthesis

A novel dehydro-aromatization reaction under mild reaction conditions was successfully developed using sulfuric acid as a cost-effective and efficient oxidant. This reaction simplified the synthesis of terephthalic acid (TA, an important aromatic monomer precursor) from biomass-derived isoprene and acrylic acid.

Inclusion complex containing epoxy resin composition for semiconductor encapsulation

The invention is an epoxy resin composition for sealing a semiconductor, including (A) an epoxy resin and (B) a clathrate complex. The clathrate complex is one of (b1) an aromatic carboxylic acid compound, and (b2) at least one imidazole compound represented by formula (II): wherein R2 represents a hydrogen atom, C1-C10 alkyl group, phenyl group, benzyl group or cyanoethyl group, and R3 to R5 represent a hydrogen atom, nitro group, halogen atom, C1-C20 alkyl group, phenyl group, benzyl group, hydroxymethyl group or C1-C20 acyl group. The composition has improved storage stability, retains flowability when sealing, and achieves an effective curing rate applicable for sealing delicate semiconductors.

Synthesis of 1,2- and 1,3-dicarboxylic acids via Pd(II)-catalyzed carboxylation of aryl and vinyl C-H bonds

A Pd(II)-catalyzed reaction protocol for the direct carboxylation of benzoic and phenylacetic acid derivatives to form dicarboxylic acids has been developed. The reaction conditions are also applicable for the carboxylation of vinyl C-H bonds. The first C-H insertion Pd-aryl complex from carboxylic acids has been characterized by X-ray crystallography. Copyright

Oxidation of alkylaromatic hydrocarbons over V2O5-Sb2O3/TiO2 catalyst

Monoalkylbenzenes, polymethylbenzenes, para-substituted toluenes and monomethylnaphthalenes were oxidized in the vapor phase by oxygen-containing gas in the presence of water over a Sb2O3-promoted V2O5/TiO2 catalyst. This type of catalyst yields carboxylic acids with high selectivity. In the oxidation of substituted alkylbenzenes only alkyl groups were oxidized. No products of oxidative dimerization were detected. Only in the oxidation of methylnaphthalenes, also products of aromatic ring oxidation are formed. A correlation between experimental data and results of quantum-chemical calculations of bond dissociation energies is discussed.

Process for producing substituted phthalic acid compounds

A process for producing a substituted phthalic acid which comprises heating a substituted tetrahydrophthalic acid compound having a substituent in at least one of the 3-, 4-, 5- and 6-positions in the presence of sulfur to dehydrogenate it, and heat-treating the product in the presence of water optionally together with an organic solvent. As required, the heat-treated product is dehydrocyclized to form a substituted phthalic acid anhydride.