(3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-(2-methylphenyl)butanoic acid (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-(o-tolyl)butanoic acid (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-(o-tolyl)butyric acid (3R)-3-[[9H-fluoren-9-ylmethoxy(oxo)methyl]amino]-4-(2-methylphenyl)butanoic acid 269398-81-4 Fmoc-(R)-3-Amino-4-(2-methylphenyl)-butyric acid CAS 269398-81-4

Purity 97%+In StockPharmaceutical Standards
CAS No.269398-81-4
Molecular FormulaC26H25NO4
Molecular Weight415.48 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

(3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-(2-methylphenyl)butanoic acid
(3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-(o-tolyl)butanoic acid
(3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-(o-tolyl)butyric acid
(3R)-3-[[9H-fluoren-9-ylmethoxy(oxo)methyl]amino]-4-(2-methylphenyl)butanoic acid
269398-81-4
Fmoc-(R)-3-Amino-4-(2-methylphenyl)-butyric acid CAS 269398-81-4 chemical structure

Description

The occurrence of (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-(2-methylphenyl)butanoic acid (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-(o-tolyl)butanoic acid (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-(o-tolyl)butyric acid (3R)-3-[[9H-fluoren-9-ylmethoxy(oxo)methyl]amino]-4-(2-methylphenyl)butanoic acid 269398-81-4 Fmoc-(R)-3-Amino-4-(2-methylphenyl)-butyric acid is closely related to a steroid core, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

(3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-(2-methylphenyl)butanoic acid (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-(o-tolyl)butanoic acid (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-(o-tolyl)butyric acid (3R)-3-[[9H-fluoren-9-ylmethoxy(oxo)methyl]amino]-4-(2-methylphenyl)butanoic acid 269398-81-4 Fmoc-(R)-3-Amino-4-(2-methylphenyl)-butyric acid (CAS 269398-81-4) is a high-purity analytical reference standard with the molecular formula C26H25NO4 and a molecular weight of 415.48 g/mol.

Based on its molecular formula C26H25NO4, (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-(2-methylphenyl)butanoic acid (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-(o-tolyl)butanoic acid (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-(o-tolyl)butyric acid (3R)-3-[[9H-fluoren-9-ylmethoxy(oxo)methyl]amino]-4-(2-methylphenyl)butanoic acid 269398-81-4 Fmoc-(R)-3-Amino-4-(2-methylphenyl)-butyric acid contains a steroid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 415.48 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.

CATO manufactures (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-(2-methylphenyl)butanoic acid (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-(o-tolyl)butanoic acid (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-(o-tolyl)butyric acid (3R)-3-[[9H-fluoren-9-ylmethoxy(oxo)methyl]amino]-4-(2-methylphenyl)butanoic acid 269398-81-4 Fmoc-(R)-3-Amino-4-(2-methylphenyl)-butyric acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.

Physical & Chemical Properties

Molecular FormulaC26H25NO4
Molecular Weight415.48 g/mol
AppearancePale yellow to yellow crystalline powder
Purity97%+
StorageStore at room temperature, protect from light, keep sealed and dry
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)15.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)2025
Nitrogen Atoms1

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