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685517-76-4

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685517-76-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 685517-76-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,8,5,5,1 and 7 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 685517-76:
(8*6)+(7*8)+(6*5)+(5*5)+(4*1)+(3*7)+(2*7)+(1*6)=204
204 % 10 = 4
So 685517-76-4 is a valid CAS Registry Number.

685517-76-4Downstream Products

685517-76-4Relevant articles and documents

The structural proliferation of 2,6-difluoropyridine through organometallic intermediates

Schlosser, Manfred,Rausis, Thierry

, p. 1018 - 1024 (2004)

Contrary to a literature claim, 2,6-difluoropyridine-3-carboxaldehyde can be readily prepared by consecutive treatment of 2,6-difluoropyridine with lithium diisopropylamide and N,N-dimethylformamide. Regioselective displacements of fluorine from the aldehyde by nucleophiles were carried out. To demonstrate the versatility of the organometallic approach, some two dozens of further 2,6-difluoropyridine derivatives were prepared applying a combination of modern organometallic methods such as site selective hydrogen/metal and halogen/metal permutations and deprotonation-triggered heavy halogen migrations. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004.

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