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197159-55-0

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197159-55-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 197159-55-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,7,1,5 and 9 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 197159-55:
(8*1)+(7*9)+(6*7)+(5*1)+(4*5)+(3*9)+(2*5)+(1*5)=180
180 % 10 = 0
So 197159-55-0 is a valid CAS Registry Number.

197159-55-0Relevant articles and documents

The synthesis of pyrimidin-4-yI substituted a-amino acids. a versatile approach from alkynyl ketones

Adlington, Robert M.,Baldwin, Jack E.,Catterick, David,Pritchard, Garcth J.

, p. 855 - 866 (1999)

The reaction of amidines with a-amino acid alkynyl ketones is shown to be a versatile route to pyrimidin-4-yl substituted a-amino acids. This route is also applicable to a parallel synthesis approach and has allowed the formation of a range of pyrimidin-4-yl substituted a-amino acids, including the naturally occurring a-amino acid L-lathyrine 4.

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