HCID 59242666, compound → HCID 24880031, compound

Participants

Reaction Steps

To a solution of 4-(5-phenyl-6-trifluoromethyl-pyridazin-3-yl)-piperazine-1-carboxylic acid tert-butyl ester (D4) (1.8 g, 0.0044 mol) in methanol (125 ml) was added Amberlyst® 15 ion exchange resin, acidic form (4.1 mmol/g) (5.3 g, 0.022 mol) and the reaction mixture was shaken at room temperature for 18 h. After this period, the mixture was filtered and then a saturated solution of ammonia in methanol was added. The mixture was shaken for 1 h, filtered and the filtrate evaporated in vacuo. The crude product was crystallised from ether/heptane to yield E1 (1.3 g, 96%). C15H15F3N4 requires 308; Found 309 (MH+).

Provenance & Evidence