1257523-44-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1257523-44-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,7,5,2 and 3 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1257523-44:
(9*1)+(8*2)+(7*5)+(6*7)+(5*5)+(4*2)+(3*3)+(2*4)+(1*4)=156
156 % 10 = 6
So 1257523-44-6 is a valid CAS Registry Number.
1257523-44-6Relevant articles and documents
Remove Amination of 6-Keto Normorphinans by Catalytic Hydrogen Transfer
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Page/Page column 9; 10, (2010/12/29)
The present invention provides processes for the stereoselective synthesis of 6-alpha-amino morphinans. In particular, the invention provides processes for the reductive amination of 6-keto normorphinans by catalytic transfer hydrogenation.