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1257985-11-7

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1257985-11-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1257985-11-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,7,9,8 and 5 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1257985-11:
(9*1)+(8*2)+(7*5)+(6*7)+(5*9)+(4*8)+(3*5)+(2*1)+(1*1)=197
197 % 10 = 7
So 1257985-11-7 is a valid CAS Registry Number.

1257985-11-7Downstream Products

1257985-11-7Relevant articles and documents

Direct alkynylation of thiophenes: Cooperative activation of TIPS-EBX with gold and Bronsted acids

Brand, Jonathan P.,Waser, Jerome

supporting information; experimental part, p. 7304 - 7307 (2010/11/05)

United we stand! Cooperative activation of the hypervalent-iodine reagent TIPS-EBX with a gold catalyst and a Bronsted acid allowed the first direct ethynylation of thiophenes at room temperature (see scheme; TFA = trifluoroacetic acid). The obtained ethynylthiophenes are important building blocks for organic dyes and electronic materials.

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