3517-33-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 3517-33-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,5,1 and 7 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 3517-33:
(6*3)+(5*5)+(4*1)+(3*7)+(2*3)+(1*3)=77
77 % 10 = 7
So 3517-33-7 is a valid CAS Registry Number.
3517-33-7Relevant articles and documents
Efficient Synthesis of the Corticosteroid Side-chain from 17-Ketones
Barton, Derek H. R.,Motherwell, William B.,Zard, Samir Z.
, p. 774 - 775 (2007/10/02)
Steroidal 17-ketones react smoothly with diethyl α-isocyanoethyl phosphonate to give, after suitable oxidative and hydrolytic reactions, the dihydroxy-acetone side-chain of corticosteroids in high yield.