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337903-73-8

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337903-73-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 337903-73-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,3,7,9,0 and 3 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 337903-73:
(8*3)+(7*3)+(6*7)+(5*9)+(4*0)+(3*3)+(2*7)+(1*3)=158
158 % 10 = 8
So 337903-73-8 is a valid CAS Registry Number.

337903-73-8Relevant articles and documents

Novel and facile solution-phase synthesis of 2,5-diketopiperazines and O-glycosylated analogs

Campo, Vanessa L.,Martins, Maristela B.,da Silva, Carlos H.T.P.,Carvalho, Ivone

experimental part, p. 5343 - 5349 (2009/10/17)

This work describes the synthesis in solution of a series of related diketopiperazines with potential biological activities: cyclo(l-Pro-l-Ser), cyclo(l-Phe-l-Ser), cyclo(d-Phe-l-Ser) and the corresponding glycosylated analogs of the latter, cyclo[d-Phe-l

Solid-phase synthesis of O-linked glycopeptide analogues of enkephalin

Mitchell,Pratt,Hruby,Polt

, p. 2327 - 2342 (2007/10/03)

The synthesis of 18 N-α-FMOC-amino acid glycosides for solid-phase glycopeptide assembly is reported. The glycosides were synthesized either from the corresponding O'Donnell Schiff bases or from N-α-FMOC-amino protected serine or threonine and the appropriate glycosyl bromide using Hanessian's modification of the Koenigs-Knorr reaction. Reaction rates of D-glycosyl bromides (e.g., acetobromoglucose) with the L- and D-forms of serine and threonine are distinctly different and can be rationalized in terms of the steric interactions within the two types of diastereomeric transition states for the D/L and D/D reactant pairs. The N-α-FMOC-protected glycosides [monosaccharides Xyl, Glc, Gal, Man, GlcNAc, and GalNAc; disaccharides Gal-β(1-4)-Glc (lactose), Glc-β(1-4)-Glc (cellobiose), and Gal-α(1-6)-Glc (melibiose)] were incorporated into 22 enkephalin glycopeptide analogues. These peptide opiates bearing the pharmacophore H-Tyr-c[DCys-Gly-Phe-DCys]- were designed to probe the significance of the glycoside moiety and the carbohydrate-peptide linkage region in blood-brain barrier (BBB) transport, opiate receptor binding, and analgesia.

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