N-[[P(S),2’R]-2’-deoxy-3’-O-[(1,1-dimethylethyl)dimethylsilyl]-2’-fluoro-2’-methyl-P-phenyl-5’-uridylyl]-L-alanine 1-Methylethyl Ester CAS 1256490-54-6

Purity 97%+In StockPharmaceutical Standards
CAS No.1256490-54-6
Molecular FormulaC28H43FN3O9PSi
Molecular Weight643.71 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

N-[[P(S),2’R]-2’-deoxy-3’-O-[(1,1-dimethylethyl)dimethylsilyl]-2’-fluoro-2’-methyl-P-phenyl-5’-uridylyl]-L-alanine 1-Methylethyl Ester CAS 1256490-54-6 chemical structure

Description

Compared with other compounds in its class, the molecular weight of 643.71 g/mol gives N-[[P(S),2’R]-2’-deoxy-3’-O-[(1,1-dimethylethyl)dimethylsilyl]-2’-fluoro-2’-methyl-P-phenyl-5’-uridylyl]-L-alanine 1-Methylethyl Ester distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

N-[[P(S),2’R]-2’-deoxy-3’-O-[(1,1-dimethylethyl)dimethylsilyl]-2’-fluoro-2’-methyl-P-phenyl-5’-uridylyl]-L-alanine 1-Methylethyl Ester (CAS 1256490-54-6), molecular formula C28H43FN3O9PSi and molecular weight 643.71 g/mol, is a CATO reference standard with documented purity and traceability.

Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a phosphate ester group, a hydroxyl group, an ether linkage, fluorine substitution, N-[[P(S),2’R]-2’-deoxy-3’-O-[(1,1-dimethylethyl)dimethylsilyl]-2’-fluoro-2’-methyl-P-phenyl-5’-uridylyl]-L-alanine 1-Methylethyl Ester is typically pale yellow to yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 643.71 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.

As a certified reference material (CRM), N-[[P(S),2’R]-2’-deoxy-3’-O-[(1,1-dimethylethyl)dimethylsilyl]-2’-fluoro-2’-methyl-P-phenyl-5’-uridylyl]-L-alanine 1-Methylethyl Ester meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

Molecular FormulaC28H43FN3O9PSi
Molecular Weight643.71 g/mol
Purity97%+
StorageStore in a cool place (≤25°C), protect from light, keep sealed and dry
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions
Degree of Unsaturation (DBE)8.5
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1990
Halogen ContentF-containing
Nitrogen Atoms3

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