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215775-99-8

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215775-99-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 215775-99-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,5,7,7 and 5 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 215775-99:
(8*2)+(7*1)+(6*5)+(5*7)+(4*7)+(3*5)+(2*9)+(1*9)=158
158 % 10 = 8
So 215775-99-8 is a valid CAS Registry Number.

215775-99-8Relevant articles and documents

Synthesis of aryl 3-O-β-cellobiosyl-β-D-glucopyranosides for reactivity studies of 1,3-1,4-β-glucanases

Planas, Antoni,Abel, Mireia,Millet, Oscar,Palasi, Josep,Pallares, Cristina,Viladot, Josep-Lluis

, p. 53 - 64 (1998)

A series of substituted aryl β-glycosides derived from 3-O-β-cellobiosyl-D-glucopyranose with different phenol-leaving group abilities as measured by the pK(a) of the free phenol group upon enzymatic hydrolysis has been synthesised. Aryl β-glycosides with a pK(a) of the free phenol leaving group>5 were prepared by phase-transfer glycosidation of the per-O-acetylated α-glycosyl bromide with the corresponding phenol, whereas the 2,4-dinitrophenyl β-glycoside was obtained by condensation of 1-fluoro-2,4-dinitrobenzene with the partially acetylated trisaccharide followed by acid de-O-acetylation. The aryl β-glycosides have been used for reactivity studies of the wild-type Bacillus licheniformis 1,3-1,4-β-d-glucan 4-glucanohydrolase. The Hammett plot log k(cat) versus pK(a) is biphasic with an upward curvature at low pK(a) values suggesting a change in transition-state structure depending on the aglycon. Copyright (C) 1998 Elsevier Science Ltd.

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