21764-22-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21764-22-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,7,6 and 4 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21764-22:
(7*2)+(6*1)+(5*7)+(4*6)+(3*4)+(2*2)+(1*2)=97
97 % 10 = 7
So 21764-22-7 is a valid CAS Registry Number.
21764-22-7Relevant articles and documents
Stereoselective Reduction of α-Iodospirolactones. Total Synthesis of (+/-)-Liguloxide.
Lee, Eun,Lee, Dae Sung,Choi, Yoon Whan,Lee, Kwang Ho
, p. 6673 - 6676 (2007/10/02)
Radical-mediated reduction of α-methyl-α-iodospirolactones yielded trans-α-methylspirolactones selectively.This reaction was used in the total synthesis of (+/-)-liguloxide.