21151-51-9 Usage
Purification Methods
Decolourise with Norit in EtOAc, evaporate, and crystallise from EtOAc or *C6H6. [Schuler et al. J Phys Chem 78 1063 1974, Gillespie & Price J Org Chem 22 782 1957, Beilstein 17 III/IV 5819.]
Check Digit Verification of cas no
The CAS Registry Mumber 21151-51-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,1,5 and 1 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 21151-51:
(7*2)+(6*1)+(5*1)+(4*5)+(3*1)+(2*5)+(1*1)=59
59 % 10 = 9
So 21151-51-9 is a valid CAS Registry Number.
21151-51-9Relevant academic research and scientific papers
Ge, Ping,Kirk, Kenneth L.
, p. 45 - 47 (1997)
Fluorination of 2-bromotetronic acid (7) in ethanol produces 2-bromo-3-ethoxy-2-fluoro-γ-butyrolactone (8). Tributyltin hydride reduction of 8 gives 2-fluorotetronic acid in good yield.
