Isopropylamine → HCID 16071255, compound

Participants

Reaction Conditions

Reaction Steps

A solution of toluene-4-sulfonic acid 2-[1-methyl-3-(naphthalene-1-sulfonyl)-1H-indazol-5-yloxy]-ethyl ester (0.433 g, 0.807 mmol) and isopropylamine (1.0 mL, 12 mmol) in THF (10 mL) was stirred at 80° C. in a sealed tube for 15 hours. Additional isopropylamine (1.0 mL, 12 mmol) was added, and the reaction mixture was stirred at 80° C. for 21 hours. It was allowed to cool to room temperature, and partitioned in ethyl acetate and aqueous sodium bicarbonate. The organic phase was washed with water and brine. It was dried with anhydrous magnesium sulfate, filtered and concentrated. The residue was purified by flash chromatography using 0.25% ammonium hydroxide/2.5% methanol in chloroform. Drying at 63° C. in vacuo for 30 minutes yielded isopropyl-{2-[1-methyl-3-(naphthalene-1-sulfonyl)-1H-indazol -5-yloxy]-ethyl}-amine as a yellow semi-solid 0.198 g, 57.9%). This was dissolved in chloroform, and ethereal hydrochloride was added. The precipitate was filtered and dried at 85° C. in vacuo for 13 hours to give the hydrochloride as an off-white solid (0.180 g): MP: 274-6° C. (dec).; Mass Spectrum (+EI, [M+H]+) m/z 424.

Provenance & Evidence