81355-78-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81355-78-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,3,5 and 5 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 81355-78:
(7*8)+(6*1)+(5*3)+(4*5)+(3*5)+(2*7)+(1*8)=134
134 % 10 = 4
So 81355-78-4 is a valid CAS Registry Number.
81355-78-4Relevant articles and documents
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).
