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1182869-38-0

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1182869-38-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1182869-38-0 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,8,2,8,6 and 9 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1182869-38:
(9*1)+(8*1)+(7*8)+(6*2)+(5*8)+(4*6)+(3*9)+(2*3)+(1*8)=190
190 % 10 = 0
So 1182869-38-0 is a valid CAS Registry Number.

1182869-38-0Relevant articles and documents

Nucleophilic substitution approach to 4′-substituted thymidines by employing 4′-benzenesulfonyl leaving group

Shimada, Hisashi,Kikuchi, Satoshi,Okuda, Saori,Haraguchi, Kazuhiro,Tanaka, Hiromichi

, p. 6008 - 6016 (2011/03/18)

Synthesis of 4′-substituted thymidines was investigated based on nucleophilic substitution using organosilicon and organoaluminum reagents. Two substrates having a benzenesulfonyl leaving group at the 4′-position were prepared for this purpose: 1-[4-benzenesulfonyl-3,5-bis-O-(tert-butyldimethylsilyl)-2-deoxy-α-l-threo-pentofuranosyl]thymine (8α) and the 4′-(benzenesulfonyl)thymidine derivative (8β). The reaction of 8α with organosilicon reagents (Me3SiCH2CH{double bond, long}CH2 and Me3SiN3) in combination with SnCl4 gave preferentially the 4′-substituted β-d-isomer: the 4′-allyl (12β) and 4′-azido (15β) derivatives, respectively. The reaction of 8α with AlMe3, however, gave the 4′-methyl-α-l-isomer (16α) as the major product, presumably through an ion pair mechanism. By employing the substrate 8β in this reaction, the 4′-methylthymidine derivative (16β) was obtained exclusively in high yield. The 4′-ethyl (20β) and 4′-cyano (24β) derivatives were also synthesized by reacting 8β with the respective organoaluminum reagent.

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