Ethyl 8-methyl-6-(naphthalen-1-yl)-4-oxo-3,4-dihydro-2H,6H-pyrimido[2,1-b][1,3]thiazine-7-carboxylate CAS 691868-90-3

Description

Compared with other compounds in its class, the molecular weight of 380.46 g/mol gives Ethyl 8-methyl-6-(naphthalen-1-yl)-4-oxo-3,4-dihydro-2H,6H-pyrimido[2,1-b][1,3]thiazine-7-carboxylate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Ethyl 8-methyl-6-(naphthalen-1-yl)-4-oxo-3,4-dihydro-2H,6H-pyrimido[2,1-b][1,3]thiazine-7-carboxylate (CAS 691868-90-3), molecular formula C21H20N2O3S and molecular weight 380.46 g/mol, is a CATO reference standard with documented purity and traceability.

Ethyl 8-methyl-6-(naphthalen-1-yl)-4-oxo-3,4-dihydro-2H,6H-pyrimido[2,1-b][1,3]thiazine-7-carboxylate (C21H20N2O3S) contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, 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

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