反应详情

To a solution of N-[3-(3-amidinophenyl)-2-(E)-propenyl]-N-[3-carbamoyl-4-(piperidin-4-yloxy)phenyl]methanesulfonamide (0.32 g) obtained in example 99(a) in methanol (15 ml) were added successively 2-ethoxy-4,5-dihydrooxazole (0.21 g), which was prepared from 2-oxazolidone according to the method described in Eur. J. Org. Chem., 10, 2645 (1999), and triethylamine (0.56 ml) at room temperature, and the resulting mixture was stirred at room temperature for 2 hours and allowed to stand at room temperature overnight and then evaporated in vacuo. The residue obtained was purified by preparative HPLC (YMC-Pack ODS-A; YMC, eluent: 12% acetonitrile/water). The amorphous solid obtained was dissolved in 1N hydrochloric acid (1.2 ml) and evaporated to dryness in vacuo to afford the title compound (0.15 g, yield: 59%) as a colorless amorphous solid.

1. customevaporated in vacuo
2. customThe residue obtained
3. customwas purified by preparative HPLC (YMC-Pack ODS-A; YMC, eluent: 12% acetonitrile/water)
4. customThe amorphous solid obtained
5. customevaporated to dryness in vacuo