Sodium Hydroxide → HCID 14476076, compound

Participants

Reaction Steps

A mixture of 1.0 g of 2-(4-methylsulfonylphenoxy)phenylacetic acid and 10 ml of polyphosphoric acid under nitrogen is stirred at 90°-100° C. for 2 hours. The reaction mixture is permitted to cool and then poured into 100 ml of an ice-water slurry. The aqueous solution is basified with 20% sodium hydroxide before being extracted with methylene chloride. The combined extracts are dried and then evaporated to dryness leaving an oil. The oil is chromatographed through a silica gel/methylene chloride column with 2% methanol in methylene chloride. The chromatographed solution is evaporated to dryness leaving an oil which solidifies on standing. The solid is triturated with pentane to provide 10,11-dihydro-2-methylsulfonyl-11-oxodibenz[b,f]oxepin, mp 105°-106° C.

Provenance & Evidence