139540-74-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139540-74-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,5,4 and 0 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 139540-74:
(8*1)+(7*3)+(6*9)+(5*5)+(4*4)+(3*0)+(2*7)+(1*4)=142
142 % 10 = 2
So 139540-74-2 is a valid CAS Registry Number.
139540-74-2Relevant 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
