反应详情

TFA (0.3 mL) was added to a solution of 4-cyano-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazole-2-carboxylic acid [2-cyclohex-1-enyl-4-(1,1-dioxo-1λ6-[1,2,6]thiadiazinan-4-yl)-phenyl]-amide (as prepared in Example 5, step (d), 21 mg, 0.030 mmol) in DCM (1 mL) and EtOH (30 μL). The resulting mixture was stirred at RT for 2 h and concentrated in vacuo. The residue obtained was purified on silica (20-50% EtOAc-hexane) to obtain the title compound (8.0 mg, 46%): 1H-NMR (CD3OD; 400 MHz): δ 8.10 (s, 1H), 8.05 (s, 1H), 7.11 (s, 1H), 5.78 (br s, 1H), 4.7 (ABq, 1H, J=16 Hz), 4.48 (ABq, 1H, J=16 Hz), 4.3 (m, 1H), 3.87 (m, 1H), 3.52 (m, 1H), 3.6 (m, 1H), 3.18 (m, 1H), 2.62 (br s, 1H), 2.22-2.34 (m, 4H), 1.72-1.90 (m, 4H). Mass spectrum (ESI, m/z): Calcd. for C21H24N6O4S, 439.1 (M−H2O+H), found 439.2.

1. concentrationconcentrated in vacuo
2. customThe residue obtained
3. customwas purified on silica (20-50% EtOAc-hexane)