502559-21-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 502559-21-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,0,2,5,5 and 9 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 502559-21:
(8*5)+(7*0)+(6*2)+(5*5)+(4*5)+(3*9)+(2*2)+(1*1)=129
129 % 10 = 9
So 502559-21-9 is a valid CAS Registry Number.
502559-21-9Relevant articles and documents
Synthesis of substituted 1,5-dioxaspiro[2.4]heptanes from 2,3-dichloroprop-1-ene
Alonso, Francisco,Melendez, Jaisiel,Yus, Miguel
, p. 3262 - 3271 (2007/10/03)
The 4,4′-di (tert-butyl)biphenyl(DTBB)-catalyzed lithiation of 2,3-dichloroprop-1-ene (10) in THF at 0°, in the presence of symmetrically substituted ketones, led to the corresponding methylene-substituted diols 11 (Scheme 2), which, by treatment with NaH
