139518-69-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139518-69-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,5,1 and 8 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 139518-69:
(8*1)+(7*3)+(6*9)+(5*5)+(4*1)+(3*8)+(2*6)+(1*9)=157
157 % 10 = 7
So 139518-69-7 is a valid CAS Registry Number.
139518-69-7Relevant academic research and scientific papers
Asymmetric synthesis of α-alkylated α-amino acids: Azocane-2-carboxylic acids
Georg, Gunda U.,Guan, Xiangming
, p. 17 - 20 (2007/10/02)
α-Alkylated azocane-2-carboxylic acid methyl esters 5 were synthesized with excellent enantiomeric excess (>96%) in four steps starting from optically active β-keto esters 1. The synthesis involved tetrazole formation, reduction, protection, and oxidation
