344869-81-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 344869-81-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,4,4,8,6 and 9 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 344869-81:
(8*3)+(7*4)+(6*4)+(5*8)+(4*6)+(3*9)+(2*8)+(1*1)=184
184 % 10 = 4
So 344869-81-4 is a valid CAS Registry Number.
344869-81-4Relevant articles and documents
SYNTHESE DE β-ETHOXYCARBONYL γ-LACTONES
Gaudemar-Bardone, F.,Mladenova, M.,Couffignal, R.
, p. 1047 - 1048 (1984)
β-ethoxycarbonyl β, γ-insaturated γ-lactones 2 are easily prepared by dehydration of β-acyl β-ethoxycarbonyl α-alkyl propionic acids.Otherwise the condensation of these acids with allylzinc reagents produces β-ethoxycarbonyl γ-lactones 3 with a β-ethyleni