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1042695-84-0

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  • methyl (1R,2R,4R)-2-[5-hexen-1-yl-(methyl)carbamoyl]-4-hydroxycyclopentane carboxylate

    Cas No: 1042695-84-0

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1042695-84-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1042695-84-0 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,4,2,6,9 and 5 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1042695-84:
(9*1)+(8*0)+(7*4)+(6*2)+(5*6)+(4*9)+(3*5)+(2*8)+(1*4)=150
150 % 10 = 0
So 1042695-84-0 is a valid CAS Registry Number.

1042695-84-0Relevant articles and documents

PROCESSES AND INTERMEDIATES FOR PREPARING A MACROCYCLIC PROTEASE INHIBITOR OF HCV

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Page/Page column 33, (2011/10/10)

A process for preparing [(1R,2R)-4-oxo-1,2-cyclopentanedicarboxylic acid II, by the resolution of racemic 4-oxo-1,2-cyclopentanedicarboxylic acid (V), said process comprising: (a) reacting 4-oxo-1,2-cyclopentanedicarboxylic acid (V) with brucine or (1R,2S)-(-)- ephedrine, thus preparing the bis-brucine or bis-(1R,2S)-(-)-ephedrine salt of (V), and (b) precipitating selectively the bis-brucine or bis-(1R,2S)-(-)-ephedrine salt of (1R,2R)-4-oxo-1,2-cyclopentanedicarboxylic acid II, while the bis-brucine or bis- (1R,2S)-(-)-ephedrine salt of [(1S,2S)-4-oxo-1,2-cyclopentanedicarboxylic acid stays in solution; (c) liberating the acid II by removal of brucine or (1R,2S)-(-)-ephedrine from the precipitated salt obtained in step (b).

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