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35805-57-3

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35805-57-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 35805-57-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,5,8,0 and 5 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 35805-57:
(7*3)+(6*5)+(5*8)+(4*0)+(3*5)+(2*5)+(1*7)=123
123 % 10 = 3
So 35805-57-3 is a valid CAS Registry Number.

35805-57-3Relevant articles and documents

Study of the effect of the nature of the side chain in esters of α-amino acids on the diastereoselectivity of condensation with 5(4H)-oxazolone in the synthesis of dipeptides with N-terminal N-acetylphenylalanine

Krasnov,Zhdanova,Solieva,Sadretdinova,Bukrina,Demin,Levit,Ezhikova,Kodess

, p. 1331 - 1334 (2004)

Conditions for fast racemization of 5(4H)-oxazolones prepared from N-acylphenylalanine were found. Reactions of 4-benzyl-2-methyl-5(4H)-oxazolone with amino acid esters proceed diastereoselectively to give predominantly dipeptides comprising R-phenylalanine. The diastereoselectivity increases with complication of the structure of the side chain in the amino acid esters.

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