Sodium Hydroxide → HCID 135610110, compound

Participants

Reaction Steps

To a stirred solution of 100 mg of ethyl [2-[2-[(5-carbamimidoyl-2-hydroxybenzenesulfonyl)-(2-methyl-1,3-thiazol-4-ylmethyl)amino]ethyl]-5-isopropylphenoxy]acetate in 0.8 mL of ethanol was added 0.183 mL of 2 mol/L sodium hydroxide solution under ice-cooling. After being stirred at the same temperature for 30 minutes, the reaction mixture was concentrated under reduced pressure. To the stirred solution of the residue in a mixture of 0.8 mL of acetonitrile and 0.8 mL of water was added 0.174 mL of 1 mol/L hydrochloric acid under ice-cooling, and the mixture was stirred at the same temperature for 5 minutes. To the mixture was added additional 0.174 mL of 1 mol/L hydrochloric acid under ice-cooling, and the mixture was stirred at the same temperature for 5 minutes. The precipitate was collected by filtration, and washed with water to give 74 mg of [2-[2-[(5-carbamimidoyl-2-hydroxybenzenesulfonyl)-(2-methyl-1,3-thiazole-4-ylmethyl)amino]ethyl]-5-isopropyl-phenoxy]acetic acid.

Provenance & Evidence