5680-10-4

Basic information

• Product Name: 1,2-Benzenedicarboxylic acid, 4,5-dimethyl-
• CAS NO: 5680-10-4
• Molecular Formula: C10H10O4
• Molecular Weight: 194.187
• Mol File: 5680-10-4.mol
• Article Data: 6

Chemical Properties

• CAS DataBase Reference: 1,2-Benzenedicarboxylic acid, 4,5-dimethyl-(CAS DataBase Reference)
• NIST Chemistry Reference: 1,2-Benzenedicarboxylic acid, 4,5-dimethyl-(5680-10-4)
• EPA Substance Registry System: 1,2-Benzenedicarboxylic acid, 4,5-dimethyl-(5680-10-4)

Safety Data

• Hazardous Substances Data: 5680-10-4(Hazardous Substances Data)

Usage

Classification

Phthalic acid derivative

Uses

Production of polymers and resins
Crosslinking agent in polyester resins
Manufacture of dyes, pigments, and pharmaceuticals

Toxicity

Low-toxicity compound

Health effects

Limited evidence of adverse health effects from exposure

Safety precautions

Proper handling and safety measures should be followed when working with this chemical

Upstream product

• 4430-91-5 2,3-dimethyl-cyclohexa-1,3-diene 
• 762-42-5 dimethyl acetylenedicarboxylate 
• 6433-42-7 1,2-dimethylcyclohexene-4,5-trans-dicarboxylic acid 
• 10564-89-3 1,2-dimethylcyclohexene-4,5-cis-dicarboxylic acid 
• 6096-53-3 dimethyl trans-1,2-dimethylcyclohexene-4,5-dicarboxylate 
• 55264-91-0 dimethyl 1,2-dimethylcyclohexene-4,5-cis-dicarboxylate 
• 95-47-6 o-xylene 
• 201230-82-2 carbon monoxide 
• 26620-46-2 4,5-dimethyl-cyclohex-4-ene-1r,2c-dicarboxylic acid diethyl ester 
• 76-09-5 2,3-dimethyl-2,3-butane diol 
• 57100-45-5 4,5-Dimethyl-cyclohex-4-ene-1,2-dicarboxylic acid diethyl ester 
• 69094-40-2 diethyl 4,5-dimethylphthalate 
• 5438-24-4 4,5-dimethyl-4-cyclohexene-1,2-dicarboxylic acid anhydride 
• 141-53-7 sodium formate 

Downstream Products

• 89-05-4 1,2,4,5-benzenetetracarboxylic acid 
• 25445-42-5 4,5-dimethylbenzene-1,2-dicarbaldehyde 
• 855199-91-6 4,5-dimethyl-2,4'-imino-di-benzoic acid 
• 69094-40-2 diethyl 4,5-dimethylphthalate 
• 619-04-5 3,4-dimethylbenzoic acid 
• 4612-57-1 2-bromo-4,5-dimethyl-benzoic acid 
• 5999-20-2 4,5-dimethylphthalic anhydride 

Relevant articles and documents

Highly-functionalized arene synthesis based on palladium on carbon-catalyzed aqueous dehydrogenation of cyclohexadienes and cyclohexenes

Transition metal-catalyzed dehydrogenation is a clean oxidation method requiring no additional oxidants. We have accomplished a heterogeneous Pd/C-catalyzed aqueous dehydrogenation of 1,4-cyclohexadienes and cyclohexenes to give the corresponding highly-functionalized arenes. Furthermore, various arenes could be efficiently constructed in a one-pot manner via a Diels-Alder reaction and the following dehydrogenation.

Ligand-accelerated non-directed C-H functionalization of arenes

The directed activation of carbon-hydrogen bonds (C-H) is important in the development of synthetically useful reactions, owing to the proximity-induced reactivity and selectivity that is enabled by coordinating functional groups. Palladium-catalysed non-directed C-H activation could potentially enable further useful reactions, because it can reach more distant sites and be applied to substrates that do not contain appropriate directing groups; however, its development has faced substantial challenges associated with the lack of sufficiently active palladium catalysts. Currently used palladium catalysts are reactive only with electron-rich arenes, unless an excess of arene is used, which limits synthetic applications. Here we report a 2-pyridone ligand that binds to palladium and accelerates non-directed C-H functionalization with arene as the limiting reagent. This protocol is compatible with a broad range of aromatic substrates and we demonstrate direct functionalization of advanced synthetic intermediates, drug molecules and natural products that cannot be used in excessive quantities. We also developed C-H olefination and carboxylation protocols, demonstrating the applicability of our methodology to other transformations. The site selectivity in these transformations is governed by a combination of steric and electronic effects, with the pyridone ligand enhancing the influence of sterics on the selectivity, thus providing complementary selectivity to directed C-H functionalization.

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.