58138-38-8

Usage

Uses

Used in Plastic Industry:
1,2-Benzenedicarboxylic acid, 4-chloro-, 1,2-dimethyl ester is used as a plasticizer for the production of polyethylene terephthalate (PET) resin. This resin is widely utilized in the manufacturing of plastic bottles and containers, making it a crucial component in the creation of various consumer products.

Upstream product

• 67-56-1 methanol 
• 89-20-3 4-chlorophthalic acid 
• 88-99-3 benzene-1,2-dicarboxylic acid 
• 74-88-4 methyl iodide 
• 124-41-4 sodium methylate 
• 7647-01-0 hydrogenchloride 
• 118-45-6 4-chlorophthalic anhydride 
• 146271-52-5 2-chloro-1-trimethylsilyloxy-1,3-butadiene 
• 762-42-5 dimethyl acetylenedicarboxylate 

Downstream Products

• 856806-80-9 5-chloro-2-(methoxycarbonyl)benzoic acid 
• 110706-49-5 4-chloro-2-(hydroxymethyl)benzyl alcohol 
• 606-23-5 1H-indene-1,3(2H)-dione 
• 36966-22-0 1,1'-biphenyl-2,2',3,3'-tetracarboxylic acid 
• 36978-37-7 3,3',4,4'-biphenyltetracarboxylic acid tetramethyl ester 
• 58138-39-9 5-chloro-2-cyano indan-1,3-dione 

Relevant academic research and scientific papers

Preparation method for biphenyltetracarboxylic dianhydride mixture

The invention relates to a preparation method for a biphenyltetracarboxylic dianhydride mixture. The preparation method comprises the following steps: with phthalic acid as a starting raw material, carrying out an electrophilic substitution reaction so as to produce a phthalic acid derivative; then subjecting the derivative to esterification so as to produce phthalate; further catalyzing phthalate and carrying out a coupling reaction so as to produce a biphenyl tetraformate mixture; and finally, successively carrying out saponification and acidification so as to produce the product biphenyltetracarboxylic dianhydride mixture. The method provided by the invention uses cheap and easily phthalic acid as the starting raw material and is a novel low-cost easily-operatable environment-friendly production method for biphenyltetracarboxylic dianhydride; moreover, isomeric compounds of all the biphenyltetracarboxylic dianhydride are synthesized at one time in the invention, so efficiency is improved and the cost is reduced.

Azabicyclic compounds for the treatment of disease

The invention provides compounds of Formula I: wherein Azabicyclo is W is a six-membered heterocyclic ring system having 1-2 nitrogen atoms or a 10-membered bicyclic-six-six-fused-ring system having up to two nitrogen atoms within either or both rings, provided that no nitrogen is at a bridge of the bicyclic-six-six-fused-ring system, and further having 1-2 substitutents independently selected from R3. These compounds may be in the form of pharmaceutical salts or compositions, may be in pure enantiomeric form or racemic mixtures, and are useful in pharmaceuticals to treat diseases or conditions in which α7 is known to be involved.

The Diels-Alder approach to musk odor type arenes

The readily accessible 2-halogeno-1-trimethylsilyloxy-1,3-butadienes react smoothly with dimethyl acetylenedicarboxylate to afford 4-halophthalic esters. One of these cycloadducts was subsequently converted into heterocyclic analogues of phantolide like musk fragrances.