277309-61-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 277309-61-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,7,7,3,0 and 9 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 277309-61:
(8*2)+(7*7)+(6*7)+(5*3)+(4*0)+(3*9)+(2*6)+(1*1)=162
162 % 10 = 2
So 277309-61-2 is a valid CAS Registry Number.
277309-61-2Relevant articles and documents
A new substitution pattern in subphthalocyanines: Regioselective synthesis and separation of 'ortho' derivatives
Claessens, Christian G.,Torres, Tomas
, p. 1603 - 1607 (2007/10/03)
The regioselective preparation of ortho-substituted subphthalocyanides was achieved employing 3-substituted phthalonitrile derivatives as starting materials. A mechanistic proposal has been outlined.