1-Methylpiperazine → HCID 71239102, compound

Participants

Reaction Conditions

Reaction Steps

1-Methylpiperazine (0.962 mL, 8.67 mmol) was added to a suspension of 2-methoxy-4,5-dinitrobenzoic acid (2.0 g, 8.26 mmol) in water (5 mL). The mixture was heated at 50° C. for 1.5 h then 75° C. for 3 h. A further 0.5 equivalents of 1-methylpiperazine was added and the mixture was heated overnight. The mixture was then allowed to cool and stand. A crystalline solid formed which was collected by filtration, washed with water and then dried on the filter to give the title compound (1.87 g, 77%) as a yellow crystalline solid; 1H NMR: 2.25 (3H, s), 2.45-2.49 (4H, m), 3.13-3.21 (4H, m), 3.93 (3H, s), 6.63 (1H, s), 8.32 (1H, s); m/z: ES+ MH+ 296.5.

Provenance & Evidence