221128-52-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221128-52-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,1,2 and 8 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 221128-52:
(8*2)+(7*2)+(6*1)+(5*1)+(4*2)+(3*8)+(2*5)+(1*2)=85
85 % 10 = 5
So 221128-52-5 is a valid CAS Registry Number.
221128-52-5Relevant articles and documents
Rapid synthesis of etherimides via catalytic arylation of silylated phenols
Thompson, D. Scott,Markoski, Larry J.,Moore, Jeffrey S.
, p. 631 - 634 (1999)
We report here a rapid and efficient method for the synthesis of aromatic etherimides from silylated phenols and 4-fluorophthalimides catalyzed by CsF. Reaction times are a few minutes and products are easily purified requiring no column chromatography.
