1309956-67-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1309956-67-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,0,9,9,5 and 6 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1309956-67:
(9*1)+(8*3)+(7*0)+(6*9)+(5*9)+(4*5)+(3*6)+(2*6)+(1*7)=189
189 % 10 = 9
So 1309956-67-9 is a valid CAS Registry Number.
1309956-67-9Relevant academic research and scientific papers
NEW PROCESS FOR THE PREPARATION OF TAPENTADOL AND INTERMEDIATES THEREOF
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, (2011/06/25)
The present invention refers to a new process for the synthesis of tapentadol comprising the quantitative resolution of the racemic mixture (V) to obtain the stereoisomer of (S)-3-(dimethylamino)-2-methyl-l-(3-nitrophenyl)-propan-l-one (VII) according to
