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130161-49-8

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130161-49-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 130161-49-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,0,1,6 and 1 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 130161-49:
(8*1)+(7*3)+(6*0)+(5*1)+(4*6)+(3*1)+(2*4)+(1*9)=78
78 % 10 = 8
So 130161-49-8 is a valid CAS Registry Number.

130161-49-8Relevant articles and documents

DIRECT SYNTHESIS OF 2-SUBSTITUTED 5-FORMYLPYRIMIDINES AND RING TRANSFORMATION OF THEIR PHENYLHYDRAZONES INTO 4-FORMYL-1-PHENYLPYRAZOLE

Takagi, Kaname,Bajnati, Abdelilah,Hubert-Habart, Michel

, p. 1105 - 1109 (2007/10/02)

Triformylmethane (1) reacted with benzamidine, guanidine and S-methylisothiourea to give 2-substituted 5-formylpyrimidines (2a-c), whose phenylhydrazones (3a-c) readily underwent ring transformation into 4-formyl-1-phenylpyrazole (4) on heating in acidic methanol.

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