Hydrazine hydrate (1:1) → 4-(4-Nitro-thiophen-2-ylmethyl)-2H-phthalazin-1-one

Participants

Reaction Conditions

Reaction Steps

A suspension of 3-(4-nitro-thiophen-2-ylmethylene)-3H-isobenzofuran-1-one (26) (1.95 g, 5.17 mmol) in hydrazine monohydrate (0.6 mL, 12.0 mmol) was heated to 90° C. for 1 hour and then cooled to room temperature. The mixture was filtered and the filtered cake was washed with water (3×40 mL), hexane (2×40 mL) and dried in vacuo at 50° C. Two peaks in LC-MS analysis, (1.0 g, 61%) and required no further purification; m/z (LC-MS, ESP), RT=4.05 mins (M+H) 289, & RT=3.71 mins (M+H) 289.

Provenance & Evidence