反应详情

N-(4-cyano-3-(1H-1,2,4-triazol-3-yl)thiophen-2-yl)-2-(2-oxo-3,4-dihydro-1,5-naphthyridin-1(2H)-yl)acetamide (180 mg, 0.475 mmol) was dissolved in MeOH/CH2Cl2 (1:1, 4 mL total), and TMSCHN2 (Aldrich, 2.0 M in diethyl ether, 8 mL, 16 mmol) was added at rt. This was stirred for 4 h, whereupon the reaction mixture was concentrated under reduced pressure. The crude residue was purified by HPLC to give a white solid as a trifluoroacetic acid salt: method [11], retention time=7.56 min; MS (ESI) 394.2 (MH+); 1H NMR (300 MHz, CD3OD) 8.41 (s, 1H), 8.25 (d, J=5.0 Hz, 1H), 7.87 (s, 1H), 7.72 (d, J=8.7 Hz, 1H), 7.52-7.42 (m, 1H), 4.98 (s, 2H), 3.97 (s, 3H), 3.40-3.20 (m, 2H), 2.96 (t, J=8.3 Hz, 2H).

1. concentrationwas concentrated under reduced pressure
2. customThe crude residue was purified by HPLC