Lithium hydroxide, monohydrate → HCID 9934115, compound

Participants

Reaction Steps

Methyl 4-{[2,6-dihydro-2-methyl-4(2-methylpropyl)-6-(1-naphthalenylmethyl)-1-oxo-1H-pyrrolo[3,4-d]pyridazin-7-yl]thio}butanoate (0.24 g) prepared as described in b) above was stirred with lithium hydroxide hydrate (0.060 g) in tetrahydrofuran-water-methanol (3:1:1) for 3 hours. The solution was evaporated and the resulting residue was partitioned between ethyl acetate and dilute hydrochloric acid. The organic layer was washed with brine, dried, and evaporated to a solid, which was chromatographed with ethyl acetate-isohexane to give, after crystallisation from ethyl acetate-cyclohexane, 4-{[2,6-dihydro-2-methyl-4(2-methylpropyl)-6-(1-naphthalenylmethyl)-1-oxo-1H-pyrrolo[3,4-d]pyridazin-7-yl]thio}butanoic acid (0.075 g).

Provenance & Evidence