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6957-89-7

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6957-89-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 6957-89-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,9,5 and 7 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 6957-89:
(6*6)+(5*9)+(4*5)+(3*7)+(2*8)+(1*9)=147
147 % 10 = 7
So 6957-89-7 is a valid CAS Registry Number.

6957-89-7Upstream product

6957-89-7Relevant articles and documents

Facile synthesis of 2,6-disubstituted benzobisthiazoles: Functional monomers for the design of organic semiconductors

Mike, Jared F.,Inteman, Jeremy J.,Ellern, Arkady,Jeffries-EL, Malika

supporting information; scheme or table, p. 495 - 497 (2010/03/25)

(Chemical Equation Presented) The synthesis of several synthetically useful 2,6-disubstituted benzobisthiazoles is described. The method is based on the Lewis acid-catalyzed ring-closing reaction between substituted orthoesters and diamino benzene dithiol. The resulting benzobisthiazoles are obtained cleanly and in good yields. These materials are of interest for the development of new organic semiconductors.

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