109480-71-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109480-71-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,4,8 and 0 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 109480-71:
(8*1)+(7*0)+(6*9)+(5*4)+(4*8)+(3*0)+(2*7)+(1*1)=129
129 % 10 = 9
So 109480-71-9 is a valid CAS Registry Number.
109480-71-9Relevant articles and documents
A Convenient Synthesis of 3-Substituted 8-Methoxy- and 6,8-Dimethoxyisocoumarins
Lewis, Christopher N.,Spargo, Peter L.,Staunton, James
, p. 944 - 946 (2007/10/02)
The reaction of N-methoxy-N-methylamides with the anion of ethyl 2-methoxy-, or 2,4-dimethoxy-6-methylbenzoate gives the corresponding ketones, which are cyclised to give the 3-substituted 8-methoxy- and 6,8-dimethoxyisocoumarins in good overall yield.
