反应详情

温度

0 °C

A mixture of tert-butyl 3-[6-(7-methoxy-4-oxo-4H-1,3-benzothiazin-2-yl)-2-pyridyl]propanoate (0.40 g, 1.0 mmol) obtained in Example 173 and trifluoroacetic acid (5.0 ml) was stirred at 0° C. for 2 hrs. The reaction mixture was concentrated under reduced pressure, combined with diisopropyl ether to give the crystals, which were collected by filtration and dried.

1. concentrationThe reaction mixture was concentrated under reduced pressure
2. customto give the crystals, which
3. filtrationwere collected by filtration
4. customdried