130473-99-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 130473-99-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,0,4,7 and 3 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 130473-99:
(8*1)+(7*3)+(6*0)+(5*4)+(4*7)+(3*3)+(2*9)+(1*9)=113
113 % 10 = 3
So 130473-99-3 is a valid CAS Registry Number.
130473-99-3Relevant articles and documents
Preparation of β-aminoesters from ketene silyl acetals and N-(alkylamino)benzotriazoles
Katritzky,Shobana,Harris
, p. 3999 - 4002 (1990)
A wide variety of β-aminoesters are prepared in good yields by the reaction of lithium ester enolates derived from ketene silyl acetals with N-(alkylamino)benzotriazoles. The secondary β-aminoesters readily cyclize to β-lactams (2-azetidinones) on deprotonation.
