21543-86-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21543-86-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,5,4 and 3 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 21543-86:
(7*2)+(6*1)+(5*5)+(4*4)+(3*3)+(2*8)+(1*6)=92
92 % 10 = 2
So 21543-86-2 is a valid CAS Registry Number.
21543-86-2Relevant academic research and scientific papers
ACID-CATALYSED REACTIONS OF 3,5-DIALKYL-SPIROOCTA-2,5-DIEN-4-ONES
Ward, R.S.,Thatcher, K.S.
, p. 4831 - 4834 (2007/10/02)
Acid-catalysed ring opening of the spirodienones (2a) and (2b) using p-toluenesulfonic acid affords the styrene derivatives (3a) and (3b), while treatment with acetic anhydride/H2SO4 affords the furan derivatives (4a) and (4b).
