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

Participants

Reaction Conditions

Reaction Steps

tert-Butyl 3-[4-methyl-6-(4-oxo-4H-1,3-benzothiazin-2-yl)-2-pyridyl]propanoate (0.44 g, 1.1 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 diisopropyl ether-methanol to give the titled compound (0.33 g, 87%) as white crystals.

Provenance & Evidence