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143956-10-9

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143956-10-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 143956-10-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,9,5 and 6 respectively; the second part has 2 digits, 1 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 143956-10:
(8*1)+(7*4)+(6*3)+(5*9)+(4*5)+(3*6)+(2*1)+(1*0)=139
139 % 10 = 9
So 143956-10-9 is a valid CAS Registry Number.

143956-10-9Relevant articles and documents

Enantioselective synthesis of β-amino acids. 7. Preparation of enantiopure α-substituted β-amino acids from 1-benzoyl-2(S)-tert-butyl-3-methylperhydropyrimidin-4-one

Juaristi, Eusebio,Quintana, Delia,Balderas, Margarita,Garcia-Perez, Enrique

, p. 2233 - 2246 (2007/10/03)

Inexpensive natural α-amino acid L-asparagine was efficiently converted to either (R)- or (S)-α-alkylated β-amino acids in enantiomerically pure state. The key intermediate in this protocol is the enantiopure N,N-acetal pyrimidinone (S)-1, a masked chiral derivative of β-alanine.

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