反应详情

A mixture of 3-(4-Fluoro-phenyl)-4-hydroxy-isothiazolo[5,4-c]pyridine-5-carboxylic acid ethyl ester (150 mg, 0.47 mmol), glycine (1.06 g, 14.1 mmol), and NaOMe (23.5 mL, 11.75 mmol, 0.5 M solution in MeOH) was refluxed for 24 h. After cooling to r.t. the mixture was concentrated in vacuo. The residue was dissolved in water (50 mL), and the solution washed with CH2Cl2 (2×30 mL) before it was acidified by addition of aqueous 1N HCl solution. The resulting precipitate was sucked off, washed with water, and dried in vacuo to give the title compound (146 mg) as white solid: MS (m/z) 346.1 (M−1)+.

1. temperaturewas refluxed for 24 h
2. concentrationwas concentrated in vacuo
3. dissolutionThe residue was dissolved in water (50 mL)
4. washthe solution washed with CH2Cl2 (2×30 mL) before it
5. additionwas acidified by addition of aqueous 1N HCl solution
6. washwashed with water
7. customdried in vacuo