Water → HCID 178480512, compound

Participants

Reaction Steps

A solution of 2-(5-{3-[(5-fluoro-1H-benzimidazol-2-yl)(1-methylpiperidin-4-yloxy)methyl]phenyl}pent-4-ynyl)isoindole-1,3-dione (example 438B, 170 mg) and hydrazine hydrate (200 μL) in ethanol (2.5 mL) is stirred a room temperature overnight. Water is added and the aqueous phase is extracted by diethyl ether. The pooled organic extracts are dried over magnesium sulfate and concentrated under reduced pressure. The residue is purified by chromatography (dichloromethane/methanol/ammonia from 95/5/0.5 to 90/10/1)) to afford the free base. One equivalent of oxalic acid in acetone is added to the free base to afford 5-{3-[(5-fluoro-1H-benzimidazol-2-yl)(1-methylpiperidin-4-yloxy)methyl]phenyl}pent-4-ynylamine oxalate as a white crystalline solid melting at 150° C.

Provenance & Evidence