1-Methylpiperazine → HCID 178428247, compound

Participants

Reaction Steps

Compound D (2.373 g, 5.92 mmol) was treated with N-methylpiperazine (10 ml) and the mixture stirred at 110° for 2 hours. The excess N-methylpiperazine was removed in vacuo then the residue was dissolved in ethyl acetate, washed with aqueous sodium bicarbonate solution, dried over magnesium sulphate, and concentrated. The residue was crystallised from methanol to give colourless crystals of desired product V-1 (1.82 g, 66%), 1H-NMR DMSO-6, δ 0.81 (4H, d), 1.79 (1H, m), 2.01 (3H, s), 2.18 (3H, s), 2.30 (4H, m), 3.35 (masked signal), 5.42 (1H, s), 6.02 (1H, br s), 7.47 (2H, d), 7.69 (2H, d), 9.22 (1H, s), 10.39 (1H, s), 11.69 (1H, s).

Provenance & Evidence