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191280-97-4

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191280-97-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 191280-97-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,1,2,8 and 0 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 191280-97:
(8*1)+(7*9)+(6*1)+(5*2)+(4*8)+(3*0)+(2*9)+(1*7)=144
144 % 10 = 4
So 191280-97-4 is a valid CAS Registry Number.

191280-97-4Relevant articles and documents

Enantioselective synthesis of a 5-LO inhibiting hydroxyurea. Construction of the dihydro-benzofuran by tandem nucleophilic addition and intramolecular cyclization

Flisak, Joseph R.,Lantos, Ivan,Liu, Li,Matsuoka, Richard T.,Mendelson, Wilford L.,Tucker, Lynn M.,Villani, Anthony J.,Zhang, Wei-Yuan

, p. 4639 - 4642 (1996)

An enantioselective synthesis of a 5-LO inhibiting chiral hydroxyurea is described based on the nucleophilic addition of dimethylsulfoxonium ylide to a nitrone bearing a mannose-derived chiral auxiliary. The dihydrobenzofuran skeleton is then constructed by a spontaneous cyclization of the initial adduct, thus completing a tandem nucleophilic addition-cyclization protocol.

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