78815-22-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 78815-22-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,8,8,1 and 5 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 78815-22:
(7*7)+(6*8)+(5*8)+(4*1)+(3*5)+(2*2)+(1*2)=162
162 % 10 = 2
So 78815-22-2 is a valid CAS Registry Number.
78815-22-2Relevant 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.
