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137283-66-0

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137283-66-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137283-66-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,2,8 and 3 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 137283-66:
(8*1)+(7*3)+(6*7)+(5*2)+(4*8)+(3*3)+(2*6)+(1*6)=140
140 % 10 = 0
So 137283-66-0 is a valid CAS Registry Number.

137283-66-0Relevant academic research and scientific papers

An improved method for the synthesis of active esters of N-protected amino acids and subsequent synthesis of dipeptides

Takeda,Ayabe,Suzuki,Konda,Harigaya

, p. 689 - 691 (2007/10/02)

4-Dimethylaminopyridine-catalyzed reaction of mixed carbonates 3 with N-protected amino acids 4 gave the corresponding active esters 5-9, from which dipeptides 11-18 were synthesized by aminolysis with amino acids 10.

A Convenient Synthesis of Peptide Using Oxallates

Takeda, Kazuyoshi,Sawada, Izumi,Suzuki, Akira,Ogura, Haruo

, p. 4451 - 4454 (2007/10/02)

The equimolar reactions of N-protected amino acids , amino acids or amino acid esters with oxallates (1a-1e) having active ester groups in the presence of pyridine in acetonitrile afforded the corresponding dipeptides via active esters in good yields.

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