Hydrazine hydrate (1:1) → 3-Chloro-6-hydrazinyl-4-(1-pyrrolidinyl)pyridazine

Participants

Reaction Steps

3,6-Dichloro-4-(pyrrolidin-1-yl)pyridazine (7.2 g, 33 mmol) and hydrazine hydrate (9.96 g, 0.2 mol) were heated at reflux in dioxan (130 ml) for 6 hours. Upon cooling the desired isomer crystallized from the reaction and was collected by filtration (4.1 g, 58%). 1H NMR (250 MHz , d6-DMSO) 1.79-1.84 (4H, m), 3.25-3.40 (4H, m), 4.12 (2H, br), 6.09 (1H, s), 7.47 (1H, s). MS (ES+) 214 [MH]+, 216 [MH]+.

Provenance & Evidence