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131204-11-0

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131204-11-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131204-11-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,2,0 and 4 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 131204-11:
(8*1)+(7*3)+(6*1)+(5*2)+(4*0)+(3*4)+(2*1)+(1*1)=60
60 % 10 = 0
So 131204-11-0 is a valid CAS Registry Number.

131204-11-0Relevant articles and documents

Synthesis of a tri- and a tetra-saccharide fragment of the capsular polysaccharide of type III group B Streptococcus.

Pozsgay,Brisson,Jennings

, p. 133 - 146 (2007/10/02)

Syntheses of the propyl glycosides (1-3) of beta-D-Galp-(1----4)-beta-D-GlcpNAc, beta-D-Glcp-(1----6)-[beta-D-Galp-(1----4)]-beta-D-GlcpNAc, and beta-D-Galp-(1----4)-beta-D-Glcp-(1----6)-[beta-D-Galp-(1----)]-beta-D- GlcpNAc, respectively, are reported. Reaction of allyl 2-acetamido-3-O-benzyl-2-deoxy-6-O-(4-methoxybenzyl)-beta-D-glucopyranos ide with 2,3,4,6-tetra-O-acetyl-alpha-D-galactopyranosyl bromide under Hg(CN)2 catalysis, followed by oxidative removal of the 4-methoxybenzyl group, gave allyl 2-acetamido-3-O-benzyl-2-deoxy-4-O-(2,3,4,6-tetra-O-acetyl-beta-D- galactopyranosyl)-beta-D-glucopyranoside (10) O-deacetylation of which, followed by hydrogenolysis/hydrogenation, gave 1. Reaction of 10 with beta-D-glucopyranose penta-acetate and beta-lactose octa-acetate, under catalysis by trimethylsilyl trifluoromethanesulfonate, and treatment of the products as for 10 gave 2 and 3, respectively. Attempted glycosylation of 10 with 2,3,4,6-tetra-O-acetyl-beta-D-glucopyranosyl bromide under catalysis by Hg(CN)2 or silver trifluoromethanesulfonate gave an orthoester. Complete assignments of the 1H- and 13C-n.m.r. spectra of 1-3 are reported together with their carbon spin-lattice relaxation times which indicate that 3 assumes a compact instead of an extended shape.

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