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Development and Validation of a UHPLC UV Method for the In-Process Control of Bosentan Monohydrate Synthesis
Authors:Jatczak  Marta  Sidoryk  Katarzyna  Kossykowska  Magdalena  &#;uniewski  Wojciech  Zagrodzka  Joanna  Lipiec-Abramska  El&#;bieta
Institution:1.R&D Analytical Chemistry Department, Pharmaceutical Research Institute, 8 Rydygiera Street, 01-793, Warsaw, Poland
;2.Chemistry Department, Pharmaceutical Research Institute, 8 Rydygiera Street, 01-793, Warsaw, Poland
;
Abstract:

Bosentan monohydrate (4-tert-butyl-N-6-(2-hydroxyethoxy)-5-(2-methoxyphenoxy)-2-(pyrimidin-2-yl) pyrimidin-4-yl]benzene-1-sulfonamide monohydrate) is a dual endothelin receptor antagonist (ERA) applied in the treatment of pulmonary arterial hypertension. To achieve effective process control of the bosentan monohydrate synthesis, it was necessary to develop a selective and not highly time-consuming method for ultra-high performance liquid chromatography (UHPLC). The method is characterized by adequate sensitivity, reproducibility and selectivity for the determination of bosentan monohydrate and related compounds from all synthetic stages. The UHPLC separation was carried out by reversed phase chromatography on the Acquity BEH C18 column (100 mm × 2.1 mm, 1.7 µm) with a mobile phase composed of solvent A (0.1 %, v/v, acetic acid in water) and solvent B (methanol), in the gradient mode at the flow rate of 0.4 mL min−1. Limits of detection and quantification for the compounds were ≤0.1 µg mL−1 and 0.3 µg mL−1, respectively. The linearity for all related compounds was investigated as in the range for the active pharmaceutical ingredient (API) and as in the range for the in-process control. The developed method was validated according to the current guidelines, proving the suitability of the method for its intended purpose.

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