6939-25-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6939-25-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,9,3 and 9 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 6939-25:
(6*6)+(5*9)+(4*3)+(3*9)+(2*2)+(1*5)=129
129 % 10 = 9
So 6939-25-9 is a valid CAS Registry Number.
6939-25-9Relevant articles and documents
Synthesis and reactions of 9,10-diazatetracyclo-[6.3.0.0.4,110.5.9]undecanes
Gribble, Gordon W.,Hirth, Bradford H.
, p. 719 - 726 (2007/10/03)
The tandem 1,3-dipolar cycloaddition between sydnones and 1,5-cyclooctadiene provides 9,10-diazatetracyclo[6.3.0.0.4,110.5,9]undecanes (the Weintraub reaction) in modest to good yields.
