Hydrazine hydrate (1:1) → 2-(4-Oxo-3,4-dihydro-phthalazin-1-ylmethyl)-isonicotinonitrile

Participants

Reaction Conditions

Reaction Steps

To crude 2-(3-oxo-3H-isobenzofuran-1-ylidenemethyl)-isonicotinonitrile (iii-int)(approx 4.0 mmol) suspended in water (30 mL) and hydrazine monohydrate (2 mL). The reaction mixture was then heated to 90° C. for 90 minutes and then cooled to room temperature. The resulting suspension was filtered and washed with methanol (5 mL), water (10 ml) and then ethyl ether (2×30 mL). A buff solid was isolated with single peak in LC-MS analysis. (0.61 g, 26.7% over 3 steps); m/z (LC-MS, ESP), RT=3.48 mins, (M+H)=263.0.

Provenance & Evidence