76227-84-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 76227-84-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,6,2,2 and 7 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 76227-84:
(7*7)+(6*6)+(5*2)+(4*2)+(3*7)+(2*8)+(1*4)=144
144 % 10 = 4
So 76227-84-4 is a valid CAS Registry Number.
76227-84-4Relevant academic research and scientific papers
Synthesis of 2-oxo-penams and penems from penicillin G
Ghosez,Marchand-Brynaert,Vekemans,et al.
, p. 2493 - 2503 (2007/10/02)
Using Penicillin G as starting material, general methods of synthesis for the 2-oxo-penam skeleton have been established. Compounds 7 represent a new group of strained penicillin derivatives. They can be readily transformed into 2-alkoxy 17 or benzoyloxypenems 18.
