Trifluoroacetic acid → HCID 45357692, compound

Participants

Reaction Steps

To a solution of 3.5 g of the compound of step (a) in 15 ml of methylene chloride was added trifluoroacetic acid (39 ml) and the mixture was stirred at ambient temperature for three hours. The mixture was then concentrated in vacuo. The residue was dissolved in methanol (30 ml) and 18M H2SO4 (3 ml) was added and the mixture was stirred overnight. The mixture was then poured into a solution of sodium carbonate in water, extracted three times with chloroform, dried over MgSO4, filtered and concentrated in vacuo to give a yellow solid. The solid was dissolved in methanol (10 ml) and hydrazine (2 ml) was added to this solution and the mixture was heated to reflux for one hour. The mixture was then concentrated in vacuo. The resulting solid was suspended in toluene (50 ml) and heated to reflux in an apparatus equipped with a Dean-Stark trap for two hours. The reaction mixture was then allowed to cool, and the product was filtered off to give 1.82 g of the subtitle compound as a tan solid.

Provenance & Evidence