Methanaminium, N-((1H-benzotriazol-1-yloxy)(dimethylamino)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1) → 3-Benzyloxy-1-methyl-4-oxo-6-[(toluene-2-sulfonylamino)-methyl]-1,4-dihydro-pyridine-2-carboxylic acid methylamide

Beteiligte Stoffe

Reaktionsschritte

To a stirred solution of 3-benzyloxy-1-methyl-4-oxo-6-[(toluene-2-sulfonylamino)-methyl]-1,4-dihydro-pyridine-2-carboxylic acid (13-02) (600.0 mg, 1.36 mmol) in dimethylformamide (10 mL) were added HBTU (O-benzotriazole-N,N,N′,N′-tetramethyl-uronium-hexafluoro-phosphate) (772.74 mg, 2.04 mmol) and triethylamine Et3N (0.942 mL, 6.78 mmol). The mixture was stirred for 30 min., then methylamine hydrochloride salt (274.88 mg, 4.07 mmol) was added and the reaction mixture was stirred at room temperature for 16 h. After completion of the reaction, it was quenched with ice cold water and then extracted with ethyl acetate. Then combined organic layer was washed with water and brine, dried over Na2SO4 and concentrated under reduced pressure. It was then purified using normal column chromatography to get 3-benzyloxy-1-methyl-4-oxo-6-[(toluene-2-sulfonylamino)-methyl]-1,4-dihydro-pyridine-2-carboxylic acid methylamide (15-02) (140.0 mg, 22.64%) as an off white solid.

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