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107940-46-5

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107940-46-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 107940-46-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,7,9,4 and 0 respectively; the second part has 2 digits, 4 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 107940-46:
(8*1)+(7*0)+(6*7)+(5*9)+(4*4)+(3*0)+(2*4)+(1*6)=125
125 % 10 = 5
So 107940-46-5 is a valid CAS Registry Number.

107940-46-5Downstream Products

107940-46-5Relevant articles and documents

A Novel Preparation of Amino Acid Diphenylmethyl Esters and Their Application in Peptide Synthesis

Barlos, Kleomenis,Kallitsis, John,Mamos, Petros,Patrianakou, Stella,Stavropoulos, Georg

, p. 633 - 636 (2007/10/02)

Trityl amino acid diphenylmethyl esters 2 were prepared by Mitsunobu condensation of tritylamino acids 1 with diphenylmethanol using excess triphenylphosphane and diethyl azodicarboxylate.The esters 2 were converted into the corresponding p-toluenesulfonates 3 on treatment with p-toluenesulfonic acid.The removal of the N-trityl group in the presence of the diphenylmethyl ester group is studied by the preparation of leucine-enkephalin (12).Best selectivity is obtained when 1-hydroxybenzotriazole in trifluoroethanol is used as detritylation reagent.

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