77139-75-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77139-75-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,1,3 and 9 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 77139-75:
(7*7)+(6*7)+(5*1)+(4*3)+(3*9)+(2*7)+(1*5)=154
154 % 10 = 4
So 77139-75-4 is a valid CAS Registry Number.
77139-75-4Relevant academic research and scientific papers
SYNTHESIS OF 2-(PHENYLTHIOMETHYLENE)OXAPENAM DERIVATIVES
Oida, Sadao,Yoshida, Akira,Ohki, Eiji
, p. 1999 - 2013 (2007/10/02)
Copper catalysed decomposition of azetidinone diazoketones 3a and 3c, resulted in the formation of 2-(phenylthiomethylene)oxapenams, 7a and 11, respectively.Similarly, decomposition of diazoketone 21b gave a mixture of 19 and 22 whose carboxylation afford
