Hydrazine hydrate (1:1) → HCID 66755984, compound

Participants

Reaction Steps

To N-{1-[(R)-1-(3-benzyl-7-chloro-4-oxo-3,4-dihydro-chromen-2-yl)-2-methyl-propyl]-2-p-tolyl-1H-imidazol-4-ylmethyl}-phthalimide (0.50 g, 0.78 mMol) in EtOH (15 mL) was added hydrazine monohydrate (0.12 mL, 2.5 mMol). The reaction was stirred at RT for 72 h, filtered through a pad of Celite® to remove the insoluble precipitate, rinsed with EtOH and evaporated to dryness. Purification by flash chromatography on silica gel [5-10% (5% NH4OH in MeOH)/CH2Cl7] gave the title compound (364 mg, 91%) as a white solid foam: 1H NMR (400 MHz, CDCl3) δ 8.14 (d, J=8.6 Hz, 1 H), 7.63 (d. J=1.8 Hz, 1 H), 7.37 (m, 6 H), 7.15 (m, 3 H), 6.71 (d, J=1.7 Hz, 1 H). 6.69 (s. 1 H), 5.00 (d, J=10.9 Hz, 1 H). 4.07 (d. J=15.5 Hz. 1 H). 3.92 (d. 1 H). 3.88 (d. 1 H), 2.72 (br s. 2 H). 2.65 (m. 1 H). 2.49 (s, 3 H). 2.48 (d. J=15.5 Hz. 1 H). 0.93 (d. J=6.6 Hz. 3 H). 0.30 (d. J=6.7 Hz. 3 H): MS (ES) m/e 512.2 (M+H)+.

Provenance & Evidence