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41328-82-9

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41328-82-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 41328-82-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,1,3,2 and 8 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 41328-82:
(7*4)+(6*1)+(5*3)+(4*2)+(3*8)+(2*8)+(1*2)=99
99 % 10 = 9
So 41328-82-9 is a valid CAS Registry Number.

41328-82-9Downstream Products

41328-82-9Relevant articles and documents

LIGNANES.10. PREPARATION DES (R)-(+) ET (S)-(-)-β-PIPERONYL ET β-VERATRYL-γ-BUTYROLACTONES ET LEUR UTILISATION DANS LA SYNTHESE TOTALE DE LIGNANES OPTIQUEMENT ACTIFS

Brown, Eric,Daugan, Alain

, p. 141 - 154 (2007/10/02)

A simple and efficient route leading to optically active β-benzyl-γ-butyrolactones is described.Thus, the methyl (R,S)-α-benzylhemisuccinate resulting from a Stobbe condensation with an appropriate aromatic aldehyde, followed by catalytic hydrogenation of the intermediate α-benzylidene hemisuccinic ester, was resolved by means of a chiral base (ephedrine or α-methyl benzylamine).Reduction of each enantiomer, using calcium borohydride, then led to the corresponding optically active β-benzyl-γ-butyrolactone.In this way, the following two lactones were obtained in both (R)-(+) and (S)-(-) enantiomeric forms, β-piperonyl- and β-veratryl-γ-butyrolactones 1 and 2 respectively.These lactones were used as key-intermediates for the syntheses of 17 optically active lignans and lignoids, such as (-)-dimethylmatairesinol (-)-23, (-)-kusunokinin (-)-26 and (+)-dimethylisolariciresinol (+)-35.

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