Methylprednisolone → 6alpha-Methylhydrocortisone

Participants

Reaction Steps

In a 250 mL round-bottomed flask was suspended (6S,8S,9S,10R,11S,13S,14S,17R)-11,17-dihydroxy-17-(2-hydroxyacetyl)-6,10,13-trimethyl-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-3-one (6α-Methyl-Prednisolone, 4.3 g, 11.48 mmol) in EtOAc (80 mL) and the reaction mixture was diluted with ethanol (20.0 mL). Wilkinsons catalyst (1 g, 1.08 mmol) was added and the mixture was hydrogenated for 1 week whilst stirring at room temperature in a hydrogen atmosphere (1 atm). The mixture was filtered and the filtrate was concentrated in vacuo, giving 4.07 g of a light brown solid. The material was used as such without any further purification. APCI-MS m/z: 377 [MH+].

Provenance & Evidence