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138811-45-7

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138811-45-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138811-45-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,8,1 and 1 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 138811-45:
(8*1)+(7*3)+(6*8)+(5*8)+(4*1)+(3*1)+(2*4)+(1*5)=137
137 % 10 = 7
So 138811-45-7 is a valid CAS Registry Number.

138811-45-7Relevant articles and documents

AN ANTIMICROBIAL AGENT

-

Page/Page column 21, (2010/02/07)

The present invention relates to novel thioglycosides of D-galactofuranose that have an antimicrobial action, methods for their synthesis, pharmaceutical compositions containing them and methods for the treatment of patients suffering microbial infection.

One-pot synthesis of β-D-Galf(1 → 4)[β-D-Galp(1 → 6)]-D-GlcNac, a 'core' trisaccharide linked O-glycosidically in glycoproteins of Trypanosoma cruzi

Gallo-Rodriguez, Carola,Varela, Oscar,De Lederkremer, Rosa M.

, p. 163 - 170 (2007/10/03)

Tin(IV) chloride-promoted condensation of benzyl 2-acetamido-3-O- benzoyl-2-deoxy-α-D-glucopyranoside (4) with penta-O-benzoyl-β-D- galactopyranose (6) gave the derivative of β-D-Galp-(1 → 6)-α-D-GlcNAc 7 in 80% yield. This was glycosylated with penta-O-benzoyl-α,β-D- galactofuranose (5), employing the same catalyst, to afford the protected benzyl per-O-benzoyl-β-D-Galf(1 → 4)[β-D-Galp(1 → 6)]D-GlcNAc 10 in 41% yield. Alternatively, compound 10 was obtained directly in a one-pot reaction from 4, by sequential addition of 6 and 5 (34% yield). β-Glycosidic linkages were diastereoselectively formed. De-O-benzoylation of 10, followed by heterogeneous catalytic transfer hydrogenolysis of the benzyl group afforded the free trisaccharide β-D-Galf(1 → 4)[ β-D-Galp(l → 6)]-D-GlcNAc (14) in 98% yield from 10. Sodium borohydride reduction of 14 gave the corresponding alditol, whose spectral data were identical to those reported for the alditol obtained from the 38-43 kDa cell-surface glycoprotein of Trypanosoma cruzi.

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