117646-12-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 117646-12-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,6,4 and 6 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 117646-12:
(8*1)+(7*1)+(6*7)+(5*6)+(4*4)+(3*6)+(2*1)+(1*2)=125
125 % 10 = 5
So 117646-12-5 is a valid CAS Registry Number.
117646-12-5Relevant articles and documents
SYNTHESIS OF 3-CARBOXYCOUMARINS FROM O-METHOXYBENZYLIDENE MELDRUM'S ACID DERIVATIVES
Armstrong, Veronica,Soto, Oriana,Valderrama, Jaime A.,Tapia, Ricardo
, p. 717 - 726 (2007/10/02)
Reaction of o-methoxybenzaldehydes with Meldrum's acid followed by cyclization in sulfuric acid of the benzylidene derivatives 3a-g affords 3-carboxycoumarins in excellent yields.
