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4,4'-bis(2,4-dimethylphenyl)-2,2'-bithienyl is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

134640-55-4

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134640-55-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 134640-55-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,6,4 and 0 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 134640-55:
(8*1)+(7*3)+(6*4)+(5*6)+(4*4)+(3*0)+(2*5)+(1*5)=114
114 % 10 = 4
So 134640-55-4 is a valid CAS Registry Number.

134640-55-4Downstream Products

134640-55-4Relevant academic research and scientific papers

Synthesis of 3,4'-Diaryl- and 4,4'-Diaryl-2,2'-bithienyls from 2,5-Dichlorothiophene

Sone, Tyo,Umetsu, Yasuhiro,Sato, Kazuaki

, p. 864 - 868 (2007/10/02)

3,4'-Diaryl- and 4,4'-diaryl-2,2'-bithienyls, new classes of mixed thiophene-arene oligomers, were synthesized from 2,5-dichlorothiophene via 4-aryl-2-chlorothiophene in three and two steps, respectively.Namely, a Friedel-Crafts type self-condensation of 4-aryl-2-chlorothiophene, followed by catalytic dechlorination, yielded unsymmetrical bithienyls.Homocoupling of 4-aryl-2-chlorothiophene using a nickel-phosphine catalyst gave symmetrical bithienyls.

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