5-(3-Methoxybenzoyl)-4-methyl-2,3,4,5-tetrahydro-1H-1,5-benzodiazepin-2-one CAS 866156-62-9

Purity 97%+In StockPharmaceutical Standards
CAS No.866156-62-9
Molecular FormulaC18H18N2O3
Molecular Weight310.35 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

5-(3-Methoxybenzoyl)-4-methyl-2,3,4,5-tetrahydro-1H-1,5-benzodiazepin-2-one CAS 866156-62-9 chemical structure

Description

5-(3-Methoxybenzoyl)-4-methyl-2,3,4,5-tetrahydro-1H-1,5-benzodiazepin-2-one (CAS 866156-62-9) is a high-purity analytical reference standard with the molecular formula C18H18N2O3 and a molecular weight of 310.35 g/mol.

The molecular framework of 5-(3-Methoxybenzoyl)-4-methyl-2,3,4,5-tetrahydro-1H-1,5-benzodiazepin-2-one (C18H18N2O3) is characterized by a steroid core, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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.

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 FormulaC18H18N2O3
Molecular Weight310.35 g/mol
AppearancePale yellow to yellow crystalline powder
Purity97%+
StorageStore at 2-8°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
Degree of Unsaturation (DBE)11.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1987
Nitrogen Atoms2

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