36978-41-3

Basic information

• Product Name: 2,3,3',4'-BIPHENYL TETRACARBOXYLIC DIANHYDRIDE
• Synonyms: 4,5'-bi-2-benzofuran-1,1',3,3'-tetrone;2,3,3',4'-biphenyl tetraCarbocylic dianhydride;[4,5']BIISOBENZOFURANYL-1,3,1',3'-TETRAONE;2,3,3',4'-BIPHENYL TETRACARBOXYLIC DIANHYDRIDE;1,1'-Biphenyl-2,3,3',4'-tetracarboxylic acid 2,3:3',4'-dianhydride;2,3,3',4'-Biphenyltetracarboxylic 2,3:3',4'-dianhydride;4,5'-Bi(1,3-isobenzofurandione);4,5'-Bi[isobenzofuran]-1,1',3,3'-tetrone
• CAS NO: 36978-41-3
• Molecular Formula: C₁₆H₆O₆
• Molecular Weight: 294.21524
• EINECS: 1592732-453-0
• Product Categories: strong recommend
• Mol File: 36978-41-3.mol
• Article Data: 9

Chemical Properties

• Melting Point: 199 °C
• Boiling Point: 609.3 °C at 760 mmHg
• Flash Point: 275 °C
• Appearance: /
• Density: 1.625 g/cm³
• Storage Temp.: Inert atmosphere,Room Temperature
• CAS DataBase Reference: 2,3,3',4'-BIPHENYL TETRACARBOXYLIC DIANHYDRIDE(CAS DataBase Reference)
• NIST Chemistry Reference: 2,3,3',4'-BIPHENYL TETRACARBOXYLIC DIANHYDRIDE(36978-41-3)
• EPA Substance Registry System: 2,3,3',4'-BIPHENYL TETRACARBOXYLIC DIANHYDRIDE(36978-41-3)

Safety Data

• Hazardous Substances Data: 36978-41-3(Hazardous Substances Data)

Usage

Uses

2,3,3',4'-Biphenyltetracarboxylic dianhydride be used for the preparation of a polyimide material.

Preparation

The preparation of 2,3,3',4'-biphenyl tetracarboxylic dianhydride is as follows:In a 1000 ml three-necked flask, 18.3 g (0.1 mol) of 4-chlorophthalic anhydride and 18.3 g (0.1 mol) were added 3-chlorophthalic anhydride, 300 g of anisole as solvent, 0.13 g (0.001 mol) of nickel chloride as a catalyst, 0.198 g (0.001 mol) of C-1 as a catalyst ligand, and 0.03 g (0.0003 mol) of sodium bromide as a catalyst Auxiliary, 13 g (0.2 mol) of zinc powder was used as a reducing agent, and the reaction was stirred at 30 ° C for 8 hours under a nitrogen atmosphere. The reaction solution was filtered to remove insoluble solids in the reaction liquid. 300 g of methanol was added to the filtration mother liquor, and the product was precipitated, filtered, and dried to obtain 25.8 g of the product 2,3,3',4'-biphenyltetracarboxylic dianhydride, yield 87.7%.

Upstream product

• 28418-89-5 4-iodophthalic anhydride 
• 28418-88-4 3-iodophthalic anhydride 
• 118-45-6 4-chlorophthalic anhydride 
• 117-21-5 3-chlorophthalic anhydride 
• 86-90-8 4-bromophthalic anhydride 
• 82-73-5 3-bromophthalic anhydride 
• 26491-49-6 4-chloro-N-phenyl phthalimide 
• 67-56-1 methanol 
• 88-99-3 benzene-1,2-dicarboxylic acid 
• 36978-40-2 2,3,3′,4′-biphenyl tetracarboxylic dianhydride 

Relevant articles and documents

Preparation and separation method of biphenyldianhydride isomer

The method mainly comprises the following steps: taking nickel salt as a catalyst, coupling with zinc as a reducing agent, coupling with an aliphatic 3 - chloronaphthalimide and an aryl 4 - chlorosuccinimide mixture as a raw material to generate a biphenyl dianhydride derivative, and separating by using different solubility parameters and obtaining 3 and 4 ’ - respectively. 3,3 ’ - And 4, 4 ’ - biphenyl derivatives are hydrolyzed and dehydrated to obtain three biphenyldianhydride isomers, and the patent application is characterized in that a simple method for separating the three biphenyltetracarboxylic dianhydride intermediate is established.

Method for preparing biphenyldianhydride isomer by ultrasonic-assisted catalytic coupling

The invention discloses a method for preparing biphenyldianhydride isomers through ultrasonic-assisted catalytic coupling. The main contents include a mixture of a nickel salt catalyst and zinc as a reducing agent, 2-THF used as a solvent, an aryl (or methyl) N - chloronaphthalimide and -4 - propyl (or isopropyl) N - chlorodifluoroimide, under -3 - by means of an ultrasonic-assisted catalytic coupling reaction 60 - 100 °C 0.5 - 3 hours. The separation and purification of the three biphenyltetracarboxylic acid isomers are realized by using different solubility parameters, and the biphenyldianhydride isomer pure product is finally obtained. The invention is characterized in that a simple method for separating the three biphenyltetracarboxylic acid isomers is established, the problem of difficulty in separation of the three biphenyl dianhydride mixtures is solved, and 3,4 - biphenyl dianhydride ’ with an asymmetric structure is obtained at lower cost.

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.