540492-28-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 540492-28-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,4,0,4,9 and 2 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 540492-28:
(8*5)+(7*4)+(6*0)+(5*4)+(4*9)+(3*2)+(2*2)+(1*8)=142
142 % 10 = 2
So 540492-28-2 is a valid CAS Registry Number.
540492-28-2Relevant articles and documents
Bridgehead Arylation: A Direct Route to Advanced Intermediates for the Synthesis of C-20 Diterpene Alkaloids
Williams, Craig M.,Mander, Lewis N.
, p. 3499 - 3502 (2003)
Equation presented. Rapid access to the ABCE ring system of the C 20 diterpene alkaloids was achieved by silver(I)-promoted intramolecular Friedel-Crafts arylation of a functional group-specific 5-bromo-3-azabicyclo[3.3.1]nonane derivative.