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133626-56-9

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133626-56-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133626-56-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,6,2 and 6 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 133626-56:
(8*1)+(7*3)+(6*3)+(5*6)+(4*2)+(3*6)+(2*5)+(1*6)=119
119 % 10 = 9
So 133626-56-9 is a valid CAS Registry Number.

133626-56-9Upstream product

133626-56-9Downstream Products

133626-56-9Relevant articles and documents

Preparation of 2,5-Bis(diarylmethylene)-2,5-dihydrothiophenes and Their Furan, Selenophene, and N-Methylpyrrole Analogs

Ishii, Akihiko,Horikawa, Yasuaki,Takaki, Ikuo,Shibata, Jun,Nakayama, Juzo,Hoshino, Masamatsu

, p. 4313 - 4316 (1991)

A series of 2,5-bis(diarylmethylene)-2,5-dihydrothiophenes and their furan, selenophene, and N-methylpyrrole analogs were synthesized in three steps either starting from 2,5-dilithiated five-membered heteroaromatics and 2 equiv of diaryl ketones or from 2,5-diaroyl five-membered heteroaromatics and 2 equiv of aryllithiums.Key Words: 2,5-dimethylene-2,5-dihydrofuran; 2,5-dimethylene-2,5-dihydrothiophene; 2,5-dimethylene-2,5-dihydroselenophene; N-methyl-2,5-dimethylene-2,5-dihydropyrrole

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