反应详情

Following the same procedure in Example 29, using N-ethyl-1H-pyrrole-3-carboxamide (2.7 g, 20 mmol) (see following step B for preparation), sodium hydride (4.0 g, 60%, 100 mmol) and 2-tert-butyl-1-(tetrahydro-2H-pyran-4-ylmethyl)-1H-benzimidazole-5-sulfonyl chloride (6.1 g, 16 mmol) in THF (250 mL). The crude product was purified by MPLC using Hex/EtOAc (1:4) on silica gel to give 4.0 g (53%) of a white solid as the title compound. 1H NMR (400 MHz, METHANOL-D4) δ 1.13 (t, J=7.23 Hz, 3 H), 1.41-1.58 (m, 4 H), 1.61 (s, 9 H), 2.24-2.38 (m, 1 H), 3.24-3.35 (m, 4 H), 3.85-3.94 (m, 2 H), 4.44 (d, J=7.42 Hz, 2 H), 6.65 (dd, J=3.32, 1.56 Hz, 1 H), 7.29 (dd, J=3.32, 2.34 Hz, 1 H), 7.77-7.82 (m, 1 H), 7.95-7.98 (m, 2 H), 8.24-8.30 (m, 1 H); MS (ESI) (M+H)+=472.8; Anal. Calcd for C24H32N4O4S+1.20 TFA+0.10 EtOAc+0.30H2O (624.86): C, 51.71; H, 5.58; N, 8.97. Found: C, 51.73; H, 5.66; N, 8.91.

1. customThe crude product was purified by MPLC