3327-06-8 Usage
General Description
1,2,3,4,5-Benzenepentacarboxylic acid pentamethyl ester, also known by its common name pyromellitic dianhydride, is a chemical compound that is commonly used as a building block in the synthesis of various polymers, resins, and other industrial products. It is a white crystalline solid that is insoluble in water and has a high melting point. Pyromellitic dianhydride is primarily used in the production of high-performance polymers such as polyimides, polyesters, and polyamides, which have applications in high-temperature-resistant materials, adhesives, and coatings. It is also used in the manufacturing of specialty resins, adhesives, and coatings for electronic and aerospace industries. Due to its high reactivity and stability, pyromellitic dianhydride is an important intermediate in the chemical industry for the production of advanced materials.
Check Digit Verification of cas no
The CAS Registry Mumber 3327-06-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,3,2 and 7 respectively; the second part has 2 digits, 0 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 3327-06:
(6*3)+(5*3)+(4*2)+(3*7)+(2*0)+(1*6)=68
68 % 10 = 8
So 3327-06-8 is a valid CAS Registry Number.
InChI:InChI=1/C16H16O10/c1-22-12(17)7-6-8(13(18)23-2)10(15(20)25-4)11(16(21)26-5)9(7)14(19)24-3/h6H,1-5H3
3327-06-8Relevant articles and documents
PdCl2(HNMe2)2-catalyzed highly selective cross [2 + 2 + 2] cyclization of alkynoates and alkenes under molecular oxygen
Shen, Yanxia,Jiang, Huanfeng,Chen, Zhengwang
supporting information; experimental part, p. 1321 - 1324 (2010/04/26)
(Chemical Equation Presented) In the course of our study on palladium-catalyzed aerobic oxidation synthesis, we found that the PdCl 2/O2/ DMF system consistently experienced DMF hydrolysis to afford PdCl2(HNMe2)2, which is the real active catalyst for the aerobic oxidation. Although in situ DMF hydrolysis has been widely used in generating supramolecular assembly architectures, as far as we know, it is the first successful example to utilize PdCl2- (HNMe2)2 in synthetic reactions. The highly selective cross [2 + 2+2] cyclization of alkynoates and different alkenes with electron-withdrawing groups could be smoothly catalyzed by PdCl 2(HNMe2)2/O2/DMF to afford the corresponding functionalized pentasubstituted benzenes in good to excellent yields (70-97%). The extension of alkyne surrogates for cross [2 + 2 + 2] cyclization from special alkenes with leaving groups to simple alkenes under molecular oxygen led to a paradigm shift in arene synthesis. 2010 American Chemical Society.
