(3R)-3-(tert-butoxycarbonylamino)-4-(o-tolyl)butanoic acid (3R)-3-(tert-butoxycarbonylamino)-4-(o-tolyl)butyric acid (3R)-4-(2-methylphenyl)-3-[(2-methylpropan-2-yl)oxycarbonylamino]butanoic acid (3R)-4-(2-methylphenyl)-3-[[(2-methylpropan-2-yl)oxy-oxomethyl]amino]butanoic acid 269398-80-3 Boc-(R)-3-Amino-4-(2-methylphenyl)-butyric acid CAS 269398-80-3

Purity 97%+In StockPharmaceutical Standards
CAS No.269398-80-3
Molecular FormulaC16H23NO4
Molecular Weight293.36 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

(3R)-3-(tert-butoxycarbonylamino)-4-(o-tolyl)butanoic acid (3R)-3-(tert-butoxycarbonylamino)-4-(o-tolyl)butyric acid (3R)-4-(2-methylphenyl)-3-[(2-methylpropan-2-yl)oxycarbonylamino]butanoic acid (3R)-4-(2-methylphenyl)-3-[[(2-methylpropan-2-yl)oxy-oxomethyl]amino]butanoic acid 269398-80-3 Boc-(R)-3-Amino-4-(2-methylphenyl)-butyric acid CAS 269398-80-3 chemical structure

Description

Compared with other compounds in its class, the molecular weight of 293.36 g/mol gives (3R)-3-(tert-butoxycarbonylamino)-4-(o-tolyl)butanoic acid (3R)-3-(tert-butoxycarbonylamino)-4-(o-tolyl)butyric acid (3R)-4-(2-methylphenyl)-3-[(2-methylpropan-2-yl)oxycarbonylamino]butanoic acid (3R)-4-(2-methylphenyl)-3-[[(2-methylpropan-2-yl)oxy-oxomethyl]amino]butanoic acid 269398-80-3 Boc-(R)-3-Amino-4-(2-methylphenyl)-butyric acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

(3R)-3-(tert-butoxycarbonylamino)-4-(o-tolyl)butanoic acid (3R)-3-(tert-butoxycarbonylamino)-4-(o-tolyl)butyric acid (3R)-4-(2-methylphenyl)-3-[(2-methylpropan-2-yl)oxycarbonylamino]butanoic acid (3R)-4-(2-methylphenyl)-3-[[(2-methylpropan-2-yl)oxy-oxomethyl]amino]butanoic acid 269398-80-3 Boc-(R)-3-Amino-4-(2-methylphenyl)-butyric acid (CAS 269398-80-3) is a high-purity analytical reference standard with the molecular formula C16H23NO4 and a molecular weight of 293.36 g/mol.

(3R)-3-(tert-butoxycarbonylamino)-4-(o-tolyl)butanoic acid (3R)-3-(tert-butoxycarbonylamino)-4-(o-tolyl)butyric acid (3R)-4-(2-methylphenyl)-3-[(2-methylpropan-2-yl)oxycarbonylamino]butanoic acid (3R)-4-(2-methylphenyl)-3-[[(2-methylpropan-2-yl)oxy-oxomethyl]amino]butanoic acid 269398-80-3 Boc-(R)-3-Amino-4-(2-methylphenyl)-butyric acid (C16H23NO4) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

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.

The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.

Physical & Chemical Properties

Molecular FormulaC16H23NO4
Molecular Weight293.36 g/mol
AppearanceOff-white to pale yellow crystalline powder
Purity97%+
StorageStore at 2-8°C, 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)6.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)2025
Nitrogen Atoms1

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