127658-20-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 127658-20-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,7,6,5 and 8 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 127658-20:
(8*1)+(7*2)+(6*7)+(5*6)+(4*5)+(3*8)+(2*2)+(1*0)=142
142 % 10 = 2
So 127658-20-2 is a valid CAS Registry Number.
127658-20-2Relevant articles and documents
SYNTHESIS OF A CARBOCYCLIC ANALOG OF QUERCETIN VIA A BARBIER REACTION
Shih, Neng-Yang,Mangiaracina, Pietro,Green, Michael J.,Ganguly, Ashit K.
, p. 5563 - 5566 (1989)
A six-step synthetic route to the carbocyclic flavonoid 2 is described.The key step involves a 1,4-addition of a tertiary bromide to a α,β-unsaturated ester by the Barbier reaction.
