642093-74-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 642093-74-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,2,0,9 and 3 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 642093-74:
(8*6)+(7*4)+(6*2)+(5*0)+(4*9)+(3*3)+(2*7)+(1*4)=151
151 % 10 = 1
So 642093-74-1 is a valid CAS Registry Number.
642093-74-1Relevant articles and documents
Novel ruthenium-catalyzed cleavage of allyl protecting group in lactams
Alcaide, Benito,Almendros, Pedro,Alonso, José M.
, p. 8693 - 8695 (2003)
A convenient and general method of synthesis of NH-lactams via Grubbs' carbene promoted isomerization of the respective N-allyl lactams followed by RuCl3-catalyzed enamide cleavage has been developed.