89656-04-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 89656-04-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,6,5 and 6 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 89656-04:
(7*8)+(6*9)+(5*6)+(4*5)+(3*6)+(2*0)+(1*4)=182
182 % 10 = 2
So 89656-04-2 is a valid CAS Registry Number.
89656-04-2Relevant articles and documents
A Regioselective Annulation of Butenolides. The Total Synthesis of (+/-) Confertifolin
Jansen, Ben J. M.,Bouwman, Catharina T.,Groot, Aede de
, p. 2977 - 2980 (2007/10/02)
γ-(Phenylsulfinyl)-α,β-unsaturated aldehydes 2, prepared from α-(n-butylthio)methylene ketones 1 via addition of lithium followed by hydrolysis and oxidation, are converted into butenolides 4 or 5 depending upon the reaction conditions.
