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19866-68-3

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19866-68-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 19866-68-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,8,6 and 6 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 19866-68:
(7*1)+(6*9)+(5*8)+(4*6)+(3*6)+(2*6)+(1*8)=163
163 % 10 = 3
So 19866-68-3 is a valid CAS Registry Number.

19866-68-3Downstream Products

19866-68-3Relevant articles and documents

Polysubstituted and ring-fused pyridazine systems from tetrafluoropyridazine

Pattison, Graham,Sandford, Graham,Wilson, Ian,Yufit, Dmitrii S.,Howard, Judith A.K.,Christopher, John A.,Miller, David D.

, p. 437 - 454 (2017)

Tetrafluoropyridazine 1 reacts with a range of oxygen-, nitrogen-, sulfur- and carbon-centred nucleophiles to give, in general, products 2 arising from substitution of fluorine para to ring nitrogen. Subsequent reaction of the trifluoropyridazine derivatives 2 gave a range of 4,5-di- and tri-substituted products 3 and 6. Related reactions of tetrafluoropyridazine 1 with difunctional nucleophiles gave [6,6]-, [5,6]- and [6,5,6]-polycyclic ring fused pyridazine scaffolds 4 and 9. Further functionalisation of scaffolds 4 by nucleophlic aromatic substitution processes involving displacement of fluorine atoms at activated sites ortho to ring nitrogen provide an indication of the synthetic possibilities offered using tetrafluoropyridazine as a starting material for the preparation of polysubstituted pyridazine and novel polyfunctional ring fused pyridazine systems with potential applications in the drug discovery arena.

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