Sodium Hydroxide → HCID 136388337, compound

Participants

Reaction Steps

A mixture of the compound (0.42 g) obtained in Example 220, 2 N aqueous sodium hydroxide solution (0.6 ml) and methanol (10 ml) was stirred at room temperature for 5 h. The reaction mixture was concentrated under reduced pressure and a 5% aqueous citric acid solution and ethyl acetate were added to the residue. The organic layer was washed with water, dried and concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (eluent, methanol:methylene chloride=5:95) to give 0.34 g of the titled compound (yield, 84%).

Provenance & Evidence