189080-73-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 189080-73-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,0,8 and 0 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 189080-73:
(8*1)+(7*8)+(6*9)+(5*0)+(4*8)+(3*0)+(2*7)+(1*3)=167
167 % 10 = 7
So 189080-73-7 is a valid CAS Registry Number.
189080-73-7Relevant articles and documents
Syntheses of thunbergols and α- and β-cembra-2,7,11-triene-4,6-diols
Astles, Peter C.,Thomas, Eric J.
, p. 845 - 856 (2007/10/03)
Alkylation of the racemic sulfone 25, available from the epoxide 8, using the iodide 24 followed by reduction gives the protected hydroxy acetal 27. Selective deprotection gives the alcohol 28. This is converted into the bromide 29 which is used to alkyla
