221004-74-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221004-74-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,0,0 and 4 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 221004-74:
(8*2)+(7*2)+(6*1)+(5*0)+(4*0)+(3*4)+(2*7)+(1*4)=66
66 % 10 = 6
So 221004-74-6 is a valid CAS Registry Number.
221004-74-6Relevant articles and documents
An asymmetric total synthesis of sanjoinine G1
Laib, Taoues,Zhu, Jieping
, p. 83 - 86 (2007/10/03)
A convergent total synthesis of sanjoinine G1, a 14-membered cyclopeptide alkaloid was described. Formation of aryl-alkyl ether bond with concomitant construction of macrocycle by way of an intramolecular SNAr reaction was the key step in this synthesis.
