67730-57-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 67730-57-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,7,7,3 and 0 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 67730-57:
(7*6)+(6*7)+(5*7)+(4*3)+(3*0)+(2*5)+(1*7)=148
148 % 10 = 8
So 67730-57-8 is a valid CAS Registry Number.
67730-57-8Relevant articles and documents
3-NITROCYCLOALKENONES, SYNTHESIS AND USE AS REVERSE AFFINITY CYCLOALKYNONE EQUIVALENTS
Corey, E. J.,Estreicher, Herbert
, p. 603 - 606 (2007/10/02)
A partical synthesis of 3-nitrocycloalkenones and their utilization as dienophiles in the Diels-Alder reaction are discribed.The results demonstrate a reverse affinity equivalency between these β-nitro-enones and "cycloalkynones".