HCID 20081816, compound → HCID 9878343, compound

Participants

Reaction Steps

8.6g (33 mmol) of crude product from Example 27 and 3.3 g of chromium(VI) oxide are heated under reflux for 1 hour in 90 ml of glacial acetic acid. The solvent is then removed on the rotary evaporator, ethyl acetate/petroleum ether 1:1 is added to the residue and undissolved material is filtered off with suction. The mother liquor is concentrated in vacuo and chromatographed over 500 g of silica gel using ethyl acetate/petroleum ether 1:1.

Provenance & Evidence