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191097-63-9

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191097-63-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 191097-63-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,1,0,9 and 7 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 191097-63:
(8*1)+(7*9)+(6*1)+(5*0)+(4*9)+(3*7)+(2*6)+(1*3)=149
149 % 10 = 9
So 191097-63-9 is a valid CAS Registry Number.

191097-63-9Relevant articles and documents

Synthesis and reactions of c-hetaryl substituted ketoses

Streicher, Hansjoerg,Reiner, Martin,Schmidt, Richard R.

, p. 277 - 298 (2007/10/03)

O-Benzyl protected gluconolactone 1 reacts readily with 2-lithio derivatives of quinaldine, 2-methylquinoxaline, 2-methylbenzimidazole and N-protected derivatives, and 1-benzyloxymethyl-2-methylimidazole at low temperatures to afford as monoaddition products the corresponding D-gluco-2-heptuloses 2-5. The benzyl protective groups can be readily removed by hydrogenolysis as shown for the transformation of 4a into 8. Acylation reactions with 4a exhibited an interesting interplay between O-and N-acylation which is dependent on the nature of the acylating agent and on the reaction conditions. Reductive removal of the anomeric hydroxy group in 4a-c and 5 was readily performed via elimination products 18a-c and 23; their hydrogenation with Pd/C gave directly the O,N-deprotected C-β-D-glucopyranosylmethyl derivatives 21 and 25, respectively.

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