3,4-bis(Benzyloxy)-6-{2-[3-chloro-4-(trifluoromethyl)phenyl]-ethynyl}pyridazine → 3,4-Bis(benzyloxy)-6-((3-chloro-4-(trifluoromethyl)phenyl)ethyl)-pyridazine

Participants

Reaction Steps

Prepared as described for 4-hydroxy-6-(2-phenylethyl)pyridazin-3(2H)-one (Example 1) from 3,4-bis(benzyloxy)-6-{2-[3-chloro-4-(trifluoromethyl)phenyl]-ethynyl}pyridazine (Intermediate 75) except that THF was used as the solvent. The crude product was purified by reverse phase chromatography (eluting with 5-100% acetonitrile in water with acid modifier) to give a pale yellow solid. The solid was recrystallised from a mixture of methyl tert-butyl ether and ethyl acetate to afford 3,4-bis(benzyloxy)-6-((3-chloro-4-(trifluoromethyl)phenyl)ethyl)-pyridazine as a white solid (0.182 g, 17%).

Provenance & Evidence