21247-20-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21247-20-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,2,4 and 7 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 21247-20:
(7*2)+(6*1)+(5*2)+(4*4)+(3*7)+(2*2)+(1*0)=71
71 % 10 = 1
So 21247-20-1 is a valid CAS Registry Number.
21247-20-1Relevant articles and documents
Reagents and synthetic methods. 31. Silylations with N-trimethylsilyl-2-oxazolidinone (TMSO)
Aizpurua, Jesus M.,Palomo, Claudio,Palomo, Antonio L.
, p. 336 - 340 (2007/10/02)
Silylation of ketones, alcohols, mercaptans, and carboxylic acids with N-trimethylsilyl-2-oxazolidinone (TMSO) and triflic acid as catalyst has been described from synthetic and mechanistic points of view.