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1204593-75-8

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1204593-75-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1204593-75-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,0,4,5,9 and 3 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1204593-75:
(9*1)+(8*2)+(7*0)+(6*4)+(5*5)+(4*9)+(3*3)+(2*7)+(1*5)=138
138 % 10 = 8
So 1204593-75-8 is a valid CAS Registry Number.

1204593-75-8Upstream product

1204593-75-8Downstream Products

1204593-75-8Relevant articles and documents

(S)-α-methyl,α-amino acids: A new stereocontrolled synthesis

Balducci, Daniele,Lazzari, Ilaria,Monari, Magda,Piccinelli, Fabio,Porzi, Gianni

experimental part, p. 829 - 837 (2010/09/04)

A new and convenient stereocontrolled synthesis of the optically pure (S)-α-methyl,α-amino acids 6(a-d) that exploits the chiral synthon 1,4-N,N-[(S)-1-phenylethyl]-piperazine-2,5-dione (1) is described. The (S)-1-phenylethyl group, bonded to each of the N-atoms of the 2,5-diketopiperazine, acts as a chiral inductor in the first alkylation, while the steric hindrance appears to be the determining factor of stereocontrol in third and forth alkylation.

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