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211795-69-6

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211795-69-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 211795-69-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,1,7,9 and 5 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 211795-69:
(8*2)+(7*1)+(6*1)+(5*7)+(4*9)+(3*5)+(2*6)+(1*9)=136
136 % 10 = 6
So 211795-69-6 is a valid CAS Registry Number.

211795-69-6Downstream Products

211795-69-6Relevant articles and documents

Synthesis of a thio-linked Lewis A (Lea) epitope

Eisele, Thomas,Windmueller, Rainer,Schmidt, Richard R.

, p. 81 - 91 (1998)

The synthesis of heptyl (α-L-fucopyranosyl)-(1 → 4)-S-[(β-D- galactopyranosyl)-(1 → 3)]-1,4-dithio-β-D-glucopyranoside (2), as thio- linked Lewis A analogue was based on thexyldimethylsilyl 3-O-allyl-2-O- benzoyl-6-O-(4-methoxybenzyl)-4-thio-β-D-glucopyranoside (15) which was readily obtained from D-galactose. Reaction of 15 with O-3,4-di-O-acetyl-2- O-(4-methoxybenzyl)-α-L-fucopyranosyl trichloroacetimidate (8) as fucosyl donor afforded the α-(1 → 4)-thio-linked disaccharide. Replacement of the 4-methoxybenzyl groups by acetyl groups and removal of the 3a-O-allyl group afforded as 3a-O-unprotected acceptor thexyldimethylsilyl (2,3,4-tri-O- acetyl-α-L-fucopyranosyl)-(1 → 4)-S-6-O-acetyl-2-O-benzoyl-4-thio-β-D- glucopyranoside (19), which gave with 2,3,4,6-tetra-O-acetyl-α-D- galactopyranosyl trichloroacetimidate as galactosyl donor (20) the trisaccharide. Transformation into a trichloroacetimidate as glycosyl donor, glycosylation of heptylmercaptan, and then removal of the O-acyl protective groups afforded target molecule 2.

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