74628-04-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 74628-04-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,6,2 and 8 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 74628-04:
(7*7)+(6*4)+(5*6)+(4*2)+(3*8)+(2*0)+(1*4)=139
139 % 10 = 9
So 74628-04-9 is a valid CAS Registry Number.
74628-04-9Relevant articles and documents
A CONVENIENT SYNTHESIS OF SUBSTITUTED γ-PYRONES
Koreeda, Masato,Akagi, Hiroshi
, p. 1197 - 1200 (2007/10/02)
An efficient and general synthetic method for various 2-mono- and 2,6-disubstituted γ-pyrones has been developed.This utilizes the C-acylation (70-85percent) of β-methoxy-α,β-enone lithium enolates 4 by acid chlorides 3 followed by the acid-catalyzed cycl
