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756899-91-9

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756899-91-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 756899-91-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,5,6,8,9 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 756899-91:
(8*7)+(7*5)+(6*6)+(5*8)+(4*9)+(3*9)+(2*9)+(1*1)=249
249 % 10 = 9
So 756899-91-9 is a valid CAS Registry Number.

756899-91-9Relevant articles and documents

An Iterative Strategy for the Synthesis of Oligothiophenes by Catalytic Cross-Coupling Reactions

Pinault, Thomas,Cherioux, Frederic,Therrien, Bruno,Suess-Fink, Georg

, p. 121 - 126 (2007/10/03)

An iterative strategy for the synthesis of new sulfur-functionalized oligothiophenes by Suzuki or Stille cross-coupling reactions was applied to the reaction of 4-bromo-tert-butylphenylthioether with thiophene derivatives. The planarity of the oligothiophenes obtained was confirmed by the single-crystal X-ray structure analysis of 2-(4′-tert-butyl-thiophenyl)thiophene, which shows a potentially large electronic conjugation length.

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