Sodium Hydroxide → HCID 67727725, compound

Participants

Reaction Steps

Ethyl 2-(4-(2-chlorophenyl)-2-ethyl-6H-thieno[3,2-f] [1,2,4]triazolo[4,3-a] [1,4]diazepin-9-ylmethylcarbamoyl)indole-1-acetate (0.83 g) obtained in Example 61 was dissolved in methanol (20 ml). A 2M aqueous sodium hydroxide solution (1.5 ml) was added, and the mixture was allowed to stand at room temperature for 4 hours. The reaction mixture was concentrated, and the residue was extracted with water. The aqueous layer was washed with ethyl acetate. Citric acid was added to adjust the aqueous layer to about pH 3.0, and the layer was extracted with ethyl acetate. The organic layer was washed with saturated brine and dried over magnesium sulfate. The solvent was evaporated, and the residue was crystallized from isopropyl ether to give 0.71 g of crude crystals. The crystals were recrystallized from ethyl acetate to give 0.63 g of 2-(4-(2-chlorophenyl)-2-ethyl-6H-thieno[3,2-f] [1,2,4]triazolo[4,3-a] [1,4]diazepin-9-ylmethylcarbamoyl)indole-1-acetic acid.

Provenance & Evidence