226947-22-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 226947-22-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,6,9,4 and 7 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 226947-22:
(8*2)+(7*2)+(6*6)+(5*9)+(4*4)+(3*7)+(2*2)+(1*2)=154
154 % 10 = 4
So 226947-22-4 is a valid CAS Registry Number.
226947-22-4Relevant articles and documents
Stereoselective synthesis of the 'cyathin' diterpene skeleton via an intramolecular pyrylium ylide-alkene cyclization
Magnus, Philip,Shen, Lan
, p. 3553 - 3560 (1999)
The pyrylium ylide precursor 18, available in eight steps from diethyl adipate, undergoes acid catalyzed cyclization to give the cyathin derivative 4α and no detectable amount of the incorrect diastereomer 4β.