反应详情

The title compound was prepared following the procedure of Example 5, step (b) using 76.7 mg (0.318 mmol) of 4-(3-nitro-4-piperidin-1-yl-phenyl)-morpholine (as prepared in the previous step), 50 mg of 10% palladium on carbon (50% by weight water), 43.6 mg (0.318 mmol) of 5-cyanofuran-2-carboxylic acid (as prepared in Example 1), 55.5 μL (0.636 mmol) of oxalyl chloride, and 83.1 μL (0.477 mmol) of DIEA. The resulting residue was chromatographed on a 10-g silica SPE column with 15-25% EtOAc-hexane to afford 54.9 mg (45%) of the title compound as a light yellow solid: 1H-NMR (CDCl3; 400 MHz): δ 9.97 (br s, 1H), 8.17 (d, 1H, J=2.8 Hz), 7.23, 7.26 (AB q, 2H, J=3.7 Hz), 7.13 (d, 1H, J=8.7 Hz), 6.66 (dd, 1H, J=8.7, 2.8 Hz), 3.84-3.87 (m, 4H), 23.17-3.19 (m, 4H), 2.75-2.85 (m, 4H), 1.77-1.82 (m, 4H), and 1.5-1.7 (br m, 2H). Mass spectrum (ESI, m/z): Calcd. for C21H24N4O3, 381.2 (M+H), found 381.2.

1. customThe title compound was prepared
2. customThe resulting residue was chromatographed on a 10-g silica SPE column with 15-25% EtOAc-hexane