Pyrazole → HCID 89657434, compound

Participants

Reaction Steps

A mixture of Example 20b (0.04 g, 0.115 mmol), 1H-pyrazole (0.016 g, 0.231 mmol), and triphenylphosphine (0.061 g, 0.231 mmol) in tetrahydrofuran (1 mL) was stirred for 2 minutes. To this solution was added di-t-butyl azodicarboxylate (DTBAD, 0.053 g, 0.231 mmol). The reaction mixture was stirred at room temperature for 3 hours. The solvent was removed under reduced pressure, and the residue was purified by preparative HPLC (C18, 10-80% acetonitrile/water with 0.1% TFA) to afford 0.006 g of the title compound. 1H NMR (500 MHz, DMSO-d6) δ 3.49 (s, 3H), 5.37 (s, 2H), 5.21 (t, J=5.8 Hz, 1H), 6.17-6.18 (m, 1H), 6.28 (t, J=1.98 Hz, 1H), 6.86 (d, J=7.63 Hz, 2H), 6.97 (d, J=8.24 Hz, 1H), 7.02 (t, J=7.32 Hz, 4H), 7.22-7.29 (m, 5H), 7.39 (d, J=2.14 Hz, 1H), 7.47 (d, J=1.83 Hz, 1H), 7.53-7.46 (m, 3H), 7.86 (d, J=2.44 Hz, 1H), 11.97 (s, 1H). (ESI+) m/z 397.2 (M+H)+.

Provenance & Evidence