33499-44-4

Basic information

• Product Name: Ethyl 3,4-diMethylbenzoate
• Synonyms: Ethyl 3,4-diMethylbenzoate;3,4-Dimethyl-benzoic acid ethyl ester
• CAS NO: 33499-44-4
• Molecular Formula: C₁₁H₁₄O₂
• Molecular Weight: 178.22766
• Mol File: 33499-44-4.mol
• Article Data: 6

Chemical Properties

• Boiling Point: 262.2°Cat760mmHg
• Flash Point: 116°C
• Appearance: /
• Density: 1.01g/cm³
• Vapor Pressure: 0.0111mmHg at 25°C
• Refractive Index: 1.504
• CAS DataBase Reference: Ethyl 3,4-diMethylbenzoate(CAS DataBase Reference)
• NIST Chemistry Reference: Ethyl 3,4-diMethylbenzoate(33499-44-4)
• EPA Substance Registry System: Ethyl 3,4-diMethylbenzoate(33499-44-4)

Safety Data

• Hazardous Substances Data: 33499-44-4(Hazardous Substances Data)

Usage

InChI:InChI=1/C11H14O2/c1-4-13-11(12)10-6-5-8(2)9(3)7-10/h5-7H,4H2,1-3H3

Upstream product

• 64-17-5 ethanol 
• 619-04-5 3,4-dimethylbenzoic acid 
• 615-60-1 4-chloro-1,2-dimethylbenzene 
• 109-94-4 formic acid ethyl ester 
• 76-09-5 2,3-dimethyl-2,3-butane diol 
• 91965-39-8 ethyl 3,4-dimethylcyclohex-3-ene-1-carboxylate 
• 583-71-1 4-bromo-o-xylene 
• 95-92-1 oxalic acid diethyl ester 
• 513-81-5 2,3-dimethyl-buta-1,3-diene 
• 140-88-5 ethyl acrylate 

Downstream Products

• 128591-02-6 6-(3,4-dimethyl-phenyl)-undecane 
• 6966-10-5 3,4-dimethylbenzyl alcohol 
• 148342-90-9 ethyl 3,4-bis(bromomethyl)benzoate 
• 142472-16-0 1,3-di-(3,4-dimethylphenyl)-1,3-propanedione 
• 166192-06-9 ethyl 2-hydroxy-4,5-dimethylbenzoate 
• 1368042-60-7 ethyl 2-chloro-4, 5-dimethylbenzoate 
• 1368035-83-9 ethyl 2-bromo-4, 5-dimethylbenzoate 
• 619-04-5 3,4-dimethylbenzoic acid 
• 528-44-9 1,2,4-benzene tricarboxylic acid 
• 40180-49-2 2-(3,4-dimethylphenyl)propan-2-ol 

Relevant articles and documents

A method of preparing 1,2,4,5-benzenetetracarboxylic acid or trimellitic acid from pinacol

The invention relates to a method of preparing 1,2,4,5-benzenetetracarboxylic acid or trimellitic acid from pinacol. The method includes a first step of selectively dehydrating the pinacol in an acid/ionic liquid catalytic system to generate 2,-3-dimethyl-1,3-butadiene; a second step of subjecting the 2,-3-dimethyl-1,3-butadiene and maleate or acrylate to a D-A cycloaddition/dehydrogenation tandemreaction to generate an aromatic ring product; and a third step of subjecting the aromatic ring product to hydrolysis and oxidation to prepare the 1,2,4,5-benzenetetracarboxylic acid or the trimellitic acid. The catalytic system adopted in the method is green, and can be recycled. The raw material is a biomass-based platform chemical, and is cheap and easily available. All reaction processes aresimple. The pinacol dehydration reaction, the dehydrogenation reaction of a D-A product and an oxidation reaction are high in activity and selectivity. The novel method for preparing the 1,2,4,5-benzenetetracarboxylic acid and the trimellitic acid which are fine chemicals from the pinacol that is a lignocelluloses based platform chemical is provided by the invention.

Sustainable production of pyromellitic acid with pinacol and diethyl maleate

Herein, we report an unprecedented and sustainable route to synthesize pyromellitic acid (PMA), a monomer of polyimide, with pinacol and diethyl maleate which can be derived from lignocellulose. Analogously, a sustainable route to trimellitic acid (TMA) was also developed using pinacol and acrylate as the feedstocks.

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