tert-Butyl 3-[6-(7-chloro-4-oxo-4H-1,3-benzothiazin-2-yl)-4-methyl-2-pyridyl]propanoate → 3-[6-(7-Chloro-4-oxo-4H-1,3-benzothiazin-2-yl)-4-methyl-2-pyridyl]propionic acid

Participants

Reaction Conditions

Reaction Steps

tert-Butyl 3-[6-(7-chloro-4-oxo-4H-1,3-benzothiazin-2-yl)-4-methyl-2-pyridyl]propanoate (0.25 g, 0.61 mmol) was dissolved in trifluoroacetic acid (5 ml), and the mixture was stirred at 0° C. for 2 hrs. The solvent was evaporated, and the residue was recrystallized from hexane-tetrahydrofuran to give the titled compound (0.16 g, 74%) as white crystals.

Provenance & Evidence