5317-21-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 5317-21-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,3,1 and 7 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 5317-21:
(6*5)+(5*3)+(4*1)+(3*7)+(2*2)+(1*1)=75
75 % 10 = 5
So 5317-21-5 is a valid CAS Registry Number.
5317-21-5Relevant academic research and scientific papers
The conversion of β-amino esters by alkylaluminum compounds into β-lactams
Vorbruggen,Woodward
, p. 1625 - 1634 (2007/10/02)
β-Amino esters with an unsubstituted amino group such as 1 or 19 can be cyclized by two equivalents of alkylaluminum compounds such as triisobutylaluminum in yields of up to 61% to the corresponding β-lactams 2 or 20.
