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141524-75-6

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141524-75-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 141524-75-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,1,5,2 and 4 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 141524-75:
(8*1)+(7*4)+(6*1)+(5*5)+(4*2)+(3*4)+(2*7)+(1*5)=106
106 % 10 = 6
So 141524-75-6 is a valid CAS Registry Number.

141524-75-6Relevant articles and documents

Preparatory study for the synthesis of the starfish alkaloid imbricatine. Syntheses of 5-arylthio-3-methyl-L-histidines

Ohba,Mukaihira,Fujii

, p. 1784 - 1790 (2007/10/02)

Chiral syntheses of 3-methyl-5-(phenylthio)-L-histidine (8a) and 3-methyl-5-(1-naphthalenylthio)-L-histidine (8b), selected as models for the asteroid alkaloid imbricatine (7), have been accomplished through a 10-step route starting from 4(5)-bromoimidazole (9). The key steps involved were methylation of 9, hydroxymethylation of 4-bromo-1-methyl-1H-imidazole (11), replacement of the 4-bromo group by an arylthio group in the aldehyde 14, and introduction of a chiral α-amino acid moiety into the chlorides 17a and 17b by the 'bis-lactim ether' method. The synthesis of the 4-(4-methoxybenzyl)thio analogue 17c, carried out in a similar manner, concluded formal syntheses of ovothiols A and C (1 and 3).

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