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862081-15-0

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862081-15-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 862081-15-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,6,2,0,8 and 1 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 862081-15:
(8*8)+(7*6)+(6*2)+(5*0)+(4*8)+(3*1)+(2*1)+(1*5)=160
160 % 10 = 0
So 862081-15-0 is a valid CAS Registry Number.

862081-15-0Downstream Products

862081-15-0Relevant articles and documents

Stereoselective synthesis of β-anomeric 4′-thiaspirocyclic ribonucleosides carrying the full complement of RNA-level hydroxyl substitution

Paquette, Leo A.,Dong, Shuzhi

, p. 5655 - 5664 (2007/10/03)

Stereoselective syntheses of a group of 4′-thiaspirocyclic ribonucleosides featuring both pyrimidine and purine classes and both possible configurations at C-5′ are described. Use is made of the Pummerer reaction of substrates carrying an α-oriented 2,4-dimethoxybenzoyloxy substituent at C-2 in order to gain reliable stereocontrol via neighboring group participation. Irrespective of the S or R configuration of the pivotal sulfoxide intermediates, the nucleobase is captured from the β-face. The competing process is formation of unsaturated sulfoxides, presumably via competing E2-type elimination. Although differences in reactivity between the two stereoisomeric series were noted, the common route has successfully given rise for the first time to desirable β-anomeric sulfur-containing spiroribonucleosides with minimum formation of the a-anomers.

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