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329-53-3

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329-53-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 329-53-3 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 3,2 and 9 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 329-53:
(5*3)+(4*2)+(3*9)+(2*5)+(1*3)=63
63 % 10 = 3
So 329-53-3 is a valid CAS Registry Number.

329-53-3Relevant articles and documents

N-trifluoroacyl lysine derivatives in the synthesis of L-lysyl-L-glutamic acid

Cherevin,Gulevich,Popova,Zubreichuk,Knizhnikov

, p. 1427 - 1431 (2008/09/16)

Conditions were developed for simultaneous preparation of N a-trifluoroacetyl-L-lysine and N α,N a-bis(trifluoroacetyl)-L-lysine at overall conversion of initial lysine monohydrochloride up to 82%. By reaction of dimethyl L-glutamate with N α,N a-bis(trifluoroacetyl)-L-lysyl chloride in the presence of triethylamine or with N α- carboxyanhydride of N a-trifluoroacetyl-L-lysine with subsequent removing protecting groups in the formed dipeptides by treating with water-ethanol solution of sodium hydroxide we obtained L-lysyl-L-glutamic acid. Physicochemical characteristics of samples obtained coincided with characteristics of L-lysyl-L-glutamic acid described in the literature thus suggesting that no racemization occurred either at the stage of peptide bond formation or at deprotection.

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