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127277-91-2

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127277-91-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 127277-91-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,7,2,7 and 7 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 127277-91:
(8*1)+(7*2)+(6*7)+(5*2)+(4*7)+(3*7)+(2*9)+(1*1)=142
142 % 10 = 2
So 127277-91-2 is a valid CAS Registry Number.

127277-91-2Relevant articles and documents

REACTION OF ADENINE NUCLEOSIDES, TOSYLATED IN THE CARBOHYDRATE MOIETY, WITH LITHIUM TRIETHYLBOROHYDRIDE

Herdewijn, Piet

, p. 6563 - 6580 (2007/10/02)

The reaction of lithium triethylborohydride with the 2',3'-di-O-p-tolylsulphonyl derivatives of 9-β-D-ribofuranosyladenine, 9-β-D-arabinofuranosyladenine, 9-β-D-xylofuranosyladenine and 9-β-D-lyxofuranosyladenine was studied.The reaction of 2',3'-di-O-p-tolylsulphonyladenosine with LiEt3BH gave 9-(3-deoxy-β-D-threo-pentofuranosyl)adenine.This rearrangement reaction was used for the synthesis of 9-(3,5-dideoxy-β-D-threo-pentofuranosyl)adenine in one step from 2',3',5'-tri-O-p-tolylsulphonyladenosine in 58percent yield.The p-tolylsulphonyl group in the 2'-"up" configuration of unprotected adenine nucleosides was preferentially attacked by LiEt3BH giving S-O-bond scission.This was shown by the formation of 9-(3-deoxy-β-D-threo-pentofuranosyl)adenine from 2',3'-di-O-p-tolylsulphonyl-9-β-D-arabinofuranosyladenine and by the formation of 9-β-D-lyxofuranosyladenine from 2'-O-p-tolylsulphonyl-9-β-D-lyxofuranosyladenine with LiEt3BH. 9-β-D-Lyxofuranosyladenine was synthesized from 3',5'-di-O-benzoyl-9-β-D-xylofuranosyladenosine in 88percent yield using a triflate displacement reaction.

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