1203905-07-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1203905-07-0 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,0,3,9,0 and 5 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1203905-07:
(9*1)+(8*2)+(7*0)+(6*3)+(5*9)+(4*0)+(3*5)+(2*0)+(1*7)=110
110 % 10 = 0
So 1203905-07-0 is a valid CAS Registry Number.
1203905-07-0Relevant articles and documents
The coumarin→indole transformation - A method for preparing 4-halo-5-hydroxyindoles from coumarins
Stoffman, Elia J. L.,Clive, Derrick. L. J.
, p. 4862 - 4870 (2009)
Readily accessible 3-alkoxycarbonyl-6-hydroxy-5-halocoumarins can be converted into 4-halo-5-hydroxyindoles by a sequence whose essential steps are conjugate reduction or conjugate addition, decarboxylation, lactone opening with ammonia, phenolic oxygen p