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1256814-09-1

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1256814-09-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1256814-09-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,6,8,1 and 4 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1256814-09:
(9*1)+(8*2)+(7*5)+(6*6)+(5*8)+(4*1)+(3*4)+(2*0)+(1*9)=161
161 % 10 = 1
So 1256814-09-1 is a valid CAS Registry Number.

1256814-09-1Downstream Products

1256814-09-1Relevant articles and documents

Synthesis and selected transformations of 3-oxido-1H-imidazole-4- carboxamides

Mloston, Grzegorz,Jasinski, Marcin

experimental part, p. 871 - 885 (2011/05/19)

An efficient synthesis of new N-alkyl- and N-aryl-3-oxido-1H-imidazole-4- carboxamides based on exploration of inexpensive, commercially available ethyl acetoacetate, paraformaldehyde and primary amines is described. Representative compounds were tested in selected transformations, such as 'sulfur-transfer reaction' leading to imidazole-2-thiones and isomerization to corresponding imidazol-2-ones. Strong intramolecular hydrogen bonding via the N-oxide function results in the reduced reactivity of 3-oxido-1H-imidazole-4-carboxamides in both reactions. Moreover, the palladium catalyzed C(2)-arylation of imidazole ring as well as azide-alkyne [3+2] cycloaddition using the N-propargyl substituted 4-carboxamide derived from an imidazole 3-oxide as a dipolarophile, were also studied.

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