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1221498-25-4

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1221498-25-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1221498-25-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,2,1,4,9 and 8 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1221498-25:
(9*1)+(8*2)+(7*2)+(6*1)+(5*4)+(4*9)+(3*8)+(2*2)+(1*5)=134
134 % 10 = 4
So 1221498-25-4 is a valid CAS Registry Number.

1221498-25-4Relevant articles and documents

The first intramolecular Heck-Matsuda reaction and its application in the syntheses of benzofurans and indoles

Siqueira, Fernanda A.,Taylor, Jason G.,Correia, Carlos Roque D.

supporting information; experimental part, p. 2102 - 2105 (2010/06/14)

In this Letter, we report, for the first time, the development of an efficient method for the intramolecular Heck reaction of arenediazonium salts in the synthesis of benzofuran and indole derivatives. In addition, this methodology allowed the synthesis of a series of dihydrobenzofuran acetic acid derivatives via a domino Heck-Matsuda coupling-carbonylation reaction.

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