1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 2-{3-Pyridin-3-yl-1-[(5-pyridin-2-yl-2-thienyl)carbonyl]-4,5-dihydro-1h-pyrazol-5-yl}phenol

Beteiligte Stoffe

Reaktionsschritte

To a solution of 2-(3-pyridin-3-yl-4,5-dihydro-1H-pyrazol-5-yl)phenol (1.01 g, 4.22 mmol) and 5-pyridin-2-ylthiophene-2-carboxylic acid (0.886 g, 4.32 mmol) in DCM (50 mL) was added EDCI (0.970 g, 5.10 mmol). The reaction mixture was allowed to stir at rt overnight. The solution was filtered and the resulting precipitate was washed with DCM to give a light tan solid. The filtrate was concentrated and the resulting residue was purified by column chromatography to give a yellow solid. The two batches of product were combined to give 2-{3-pyridin-3-yl-1-[(5-pyridin-2-yl-2-thienyl)carbonyl]4,5-dihydro-1H-pyrazol-5-yl}phenol (I-76) (1.293 g, 72%) as a tan solid. 1H NMR (400 MHz, d6-DMSO, HCl salt) δ: 9.71-9.84 (bs, 1H), 9.11-9.16 (m, 1H), 8.72-8.77 (m, 1H), 8.60-8.65 (m, 1H), 8.35-8.42 (m, 1H), 8.06 (d, 1H), 8.01-8.04 (m, 1H), 7.84-7.94 (m, 2H), 7.66-7.73 (m, 1H), 7.34-7.41 (m, 1H), 7.04-7.12 (m, 1H), 6.93-6.99 (m, 1H), 6.82-6.87 (m, 1H), 6.73 (t, 1H), 5.87 (dd, 1H), 3.92 (dd, 1H), and 3.22 (dd, 1H). LCMS: (FA) ES+ 427.5, ES-425.4.

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