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206358-62-5

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206358-62-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 206358-62-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,6,3,5 and 8 respectively; the second part has 2 digits, 6 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 206358-62:
(8*2)+(7*0)+(6*6)+(5*3)+(4*5)+(3*8)+(2*6)+(1*2)=125
125 % 10 = 5
So 206358-62-5 is a valid CAS Registry Number.

206358-62-5Downstream Products

206358-62-5Relevant articles and documents

Synthesis of functionalized, unsymmetrical 1,3,4,6-tetrasubstituted 2,5-diketopiperazines

Tullberg, Marcus,Grotli, Morten,Luthman, Kristina

, p. 195 - 199 (2007/10/03)

A general and efficient method for the synthesis of unsymmetrical 1,3,4,6-tetrasubstituted 2,5-diketopiperazines (DKPs) is described. Cyclization of N-amide alkylated dipeptide methyl esters, followed by alkylation, furnished the corresponding tetrasubsti

Dynamic resolution of α-bromo-α-alkyl esters using N-methyl pseudoephedrine as a chiral auxiliary: Asymmetric syntheses of α-amino acid derivatives

Lee, Sang-Kuk,Nam, Jiyoun,Yong, Sun Park

, p. 790 - 792 (2007/10/03)

N-Methyl pseudoephedrine mediated dynamic resolution of α-bromo-α-alkyl esters in nucleophilic substitution reaction has been investigated. Best results are obtained when α-bromo-α-alkyl esters 1, 4 and 5 are allowed to equilibrate before the addition of nucleophile. This simple epimerization-substitution sequence provides a practical protocol for asymmetric syntheses of α-amino acid derivatives 2, 7 and 8 up to 98:2 enantiomeric ratio.

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