p-Toluenesulfonic acid monohydrate → HCID 13826519, compound

Participants

Reaction Steps

A mixture of 3.56 g. (0.0053 mole) of [1α,3β,24R]-1,3-bis-[(tetrahydro-2H-pyran-2-yl)oxy]-25-(1-ethoxyethoxy)-24-fluorocholest-5-ene, 140 ml. of methanol and 0.58 g. of p-toluenesulfonic acid monohydrate was stirred at 25° C. for 3 hr. The mixture was quenched by adding 1.0 g. of sodium bicarbonate and stirring for 0.5 hr. The mixture was then evaporated to dryness. The residue was triturated with ethyl aceate, filtered, and evaporated to dryness. The crude solid was recrystallized from ethyl acetate to yield [1α,3β,24R]-24-fluorocholest-5-en-1,3,25-triol, mp 156°-158°, [α]D21 +4° (c 0.5, MeOH).

Provenance & Evidence