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5024-81-7

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5024-81-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 5024-81-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,0,2 and 4 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 5024-81:
(6*5)+(5*0)+(4*2)+(3*4)+(2*8)+(1*1)=67
67 % 10 = 7
So 5024-81-7 is a valid CAS Registry Number.

5024-81-7Downstream Products

5024-81-7Relevant articles and documents

Synthesis of functionalized p-phenylene oxide oligomers

Wang, Leyong,Xi, Haitao,Sun, Xiaoqiang,Shen, Yingzhong,Yang, Yang,Pan, Yi,Hu, Hongwen

, p. 227 - 234 (2000)

Oligomers of p-phenylene oxides have been synthesized by coupling of substituted phenols and aryl bromides in the presence of cuprous chloride. The chain length varies from 2 to 5 phenyl rings functionalized at one end by an OH and OMe group and at the other end by an OH, OMe or NO2 functions. The oligomers could be used in material science and as building blocks in supramolecular chemistry. Methods for chemoselective demethylation of methoxy groups were developed.

Synthesis and structure of cyclic oligo(p-phenylene oxide)s, -(C 6H4O)n- (n = 6-10)

Takeuchi, Daisuke,Asano, Itaru,Osakada, Kohtaro

, p. 8614 - 8617 (2007/10/03)

Stepwise growth of oligo(p-phenylene oxide)s and cyclization via the Ullmann coupling reaction by using CuI/N,N-dimethylglycine afforded cyclic oligo(p-phenyleneoxide)s, -(C6H4O)n-(n = 6-10). The structure of the new cyclophanes was determined by X-ray crystallography, which revealed that they have planar or slightly bent structures with diameters of 1.0-1.5 nm.

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