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74149-58-9

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74149-58-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 74149-58-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,1,4 and 9 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 74149-58:
(7*7)+(6*4)+(5*1)+(4*4)+(3*9)+(2*5)+(1*8)=139
139 % 10 = 9
So 74149-58-9 is a valid CAS Registry Number.

74149-58-9Relevant articles and documents

Acetogenin Synthesis. Organocopper Reagents, Anions of 1,3-Dithians and of Protected Cyanohydrins as Intermediates in Ketide Side-chain Synthesis

Colombo, Lino,Gennari, Cesare,Santandrea, Marco,Narisano, Enrica,Scolastico, Carlo

, p. 136 - 140 (2007/10/02)

The synthesis is reported of 3-s-butyl-4-methyl-3,6,8-trihydroxy-3,4-dihydroisocoumarin (1a) and 3-(1-methylprop-1-enyl)-4-methyl-3,6,8-trihydroxy-3,4-dihydroisocoumarin (1b) using organocopper reagents and anions of 1,3-dithians for compound (1a), and an

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