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1334511-59-9

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1334511-59-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1334511-59-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,3,4,5,1 and 1 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1334511-59:
(9*1)+(8*3)+(7*3)+(6*4)+(5*5)+(4*1)+(3*1)+(2*5)+(1*9)=129
129 % 10 = 9
So 1334511-59-9 is a valid CAS Registry Number.

1334511-59-9Upstream product

1334511-59-9Downstream Products

1334511-59-9Relevant articles and documents

Efficient preparation of Fmoc-aminoacyl-N-ethylcysteine unit, a key device for the synthesis of peptide thioesters

Hojo, Hironobu,Kobayashi, Hajime,Ubagai, Risa,Asahina, Yuya,Nakahara, Yuko,Katayama, Hidekazu,Ito, Yukishige,Nakahara, Yoshiaki

experimental part, p. 6807 - 6813 (2011/11/07)

The synthesis of Fmoc-aminoacyl-N-ethyl-S-triphenylmethylcysteine, an N- to S-acyl migratory device for the preparation of peptide thioesters by Fmoc-SPPS (solid-phase peptide synthesis) is described. Condensation of Fmoc-aminoacyl pentafluorophenyl ester and N-ethyl-S-triphenylmethylcysteine was efficiently performed in the presence of HOOBt (3-hydroxy-3,4-dihydro-4-oxo-1,2,3- benzotriazine) in DMF. A small amount of diastereomer yielded during the reaction was easily separated by HPLC purification and the highly pure devices were obtained for most of the proteinogenic amino acids.

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