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1208998-95-1

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1208998-95-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1208998-95-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,0,8,9,9 and 8 respectively; the second part has 2 digits, 9 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1208998-95:
(9*1)+(8*2)+(7*0)+(6*8)+(5*9)+(4*9)+(3*8)+(2*9)+(1*5)=201
201 % 10 = 1
So 1208998-95-1 is a valid CAS Registry Number.

1208998-95-1Relevant articles and documents

Attempted cycloaromatization of α-arylmethyl sulfones with 2-bis(methylthio)methylene-1-tetralone: Unexpected formation of 2-aryl-3-(methylthio)-4,5-dihydronaphtho[1,2-b]furans

Nandi, Sukumar,Kumar, Sarvesh,Ila, Hiriyakkanavar,Junjappa, Hiriyakkanavar

experimental part, p. 22 - 31 (2010/09/05)

Base-induced conjugate addition-elimination of α-arylmethyl sulfones to α-oxoketene dithioacetal 1 followed by acid-induced cyclization affords 2-phenyl-3-(methylthio)-4,5-dihydronaphtho[1,2-b]furans which could be converted to parent aromatized products by DDQ dehydrogenation followed by Raney-Ni dethiomethylation. The approach was found to be amenable to a variety of sulfone components.

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