HCID 11624650, compound → HCID 54293704, compound

Participants

Reaction Steps

To 60 mg of (5α,20R)-4-diazo-21-hydroxy-20-methyl-pregnane-3-one in 5 ml of dichloromethane is added 60 mg of pyridinium chlorochromate and the mixture is stirred for 16 hours at room temperature. It is then diluted with ether and filtered through a small column of silica gel in ether. Evaporation of the solvent leaves a solid which is recrystallized from ether to give (5α,20R)-4-diazo-3-oxopregnane-20-carboxaldehyde which melts with decomposition.

Provenance & Evidence