反应详情

Following the same procedure in Example 1, Step A, using 2-tert-butyl-1-[(4,4-difluorocyclohexyl)methyl]-1H-benzimidazole-5-sulfonyl chloride (1.6 g, 4 mmol), N,N-diisopropylethylamine (3.5 mL, 20 mmol) and morpholine-2-carboxylic acid hydrochloride (1.0 g, 6 mmol) in methylene chloride (10 mL). Obtained 1.5 g of crude product which was carried over to step A. 1H NMR (400 MHz, METHANOL-D4) δ 1.53 (d, J=13.67 Hz, 2 H), 1.59 (s, 12 H), 1.63-1.78 (m, 6 H), 1.98-2.12 (m, 3 H), 3.22 (q, J=7.36 Hz, 1 H), 3.72 (m, 1 H), 4.42 (d, J=7.42 Hz, 2 H), 7.69 (d, J=8.40 Hz, 1 H), 7.81 (d, J=8.40 Hz, 1 H), 8.05 (s, 1 H).