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181581-97-5

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181581-97-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 181581-97-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,1,5,8 and 1 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 181581-97:
(8*1)+(7*8)+(6*1)+(5*5)+(4*8)+(3*1)+(2*9)+(1*7)=155
155 % 10 = 5
So 181581-97-5 is a valid CAS Registry Number.

181581-97-5Downstream Products

181581-97-5Relevant articles and documents

Synthesis of pyrazine C-ribosides via direct metalation

Liu, Weimin,Walker II, John A.,Chen, Jiong J.,Wise, Dean S.,Townsend, Leroy B.

, p. 5325 - 5328 (2007/10/03)

A direct metalation method has been developed for the synthesis of novel pyrazine C-nucleosides. The regiochemistry was controlled by selecting different substituents on the pyrazine ring and excellent stereoselectivity was achieved via a hydride delivery strategy. The scope and limitations of this method were studied. The uniquely designed 4b is a versatile synthon for the preparation of other pyrazine C-nucleosides.

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