74949-40-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 74949-40-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,9,4 and 9 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 74949-40:
(7*7)+(6*4)+(5*9)+(4*4)+(3*9)+(2*4)+(1*0)=169
169 % 10 = 9
So 74949-40-9 is a valid CAS Registry Number.
74949-40-9Relevant articles and documents
A SYNTHESIS OF 3-(α,β-EPOXY)-2-AZETIDINONES DERIVATIVES
Kano, Shinzo,Ebata, Tsutomu,Yuasa, Yoko,Shibuya, Shiroshi
, p. 589 - 592 (2007/10/02)
Condensation of 1-phenyl-2-azetidinone with α-methylthio ketones yielded the corresponding β-hydroxy sulfides, which were converted to 3-(α,β-epoxy)-1-phenyl-2-azetidinones through two steps involving desulfurization of the sulfonium iodides.In a similar
