221000-87-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221000-87-9 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 0 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 221000-87:
(8*2)+(7*2)+(6*1)+(5*0)+(4*0)+(3*0)+(2*8)+(1*7)=59
59 % 10 = 9
So 221000-87-9 is a valid CAS Registry Number.
221000-87-9Relevant academic research and scientific papers
A simple and practical access to enantiopure 2,3-diamino acid derivatives
Zhou, Xiao-Ti,Lin, Ying-Rui,Dai, Li-Xin
, p. 855 - 862 (2007/10/03)
Enantiomerically pure (4R,5R)- and (4S,5S)-2-imidazolines 5 were conveniently obtained on a gram scale. These can be converted into enantiopure (2R,3R)-2,3-diamino ester 6 or 2,3-diamino alcohol 7 by hydrolysis or reduction.
