反应详情

4-Chlorobenzenesulfonylchloride (3.17 g, 15 mmol) was added to a mixture of cis-methyl 2-aminocycloheptanecarboxylate hydrochloride 2.08 g, 10 mmol) and triethylamine (4.2 mL, 30 mmol) and stirred at room temperature for 4 h. The reaction was partitioned between 100 mL diethyl ether and 100 mL water. The organic layer was dried over sodium sulfate, concentrated, and purified by flash chromatography on 120 g silica gel with 0 to 30% ethyl acetate in hexane to yield cis-methyl 2-(4-chlorophenylsulfonamido)cycloheptanecarboxylate (3.15 g, 91%). 1H NMR (400 MHz, CDCl3) δ ppm 7.78-7.81 (1H, m), 7.74-7.78 (1H, m), 7.46-7.48 (1H, m), 7.42-7.46 (1H, m), 5.33 (1H, d, J=9.57 Hz), 3.59 (3H, s), 3.53 (1H, tt, J=9.57, 4.03 Hz), 2.80 (1H, dt, J=8.06, 4.03 Hz), 1.76-1.92 (2H, m), 1.44-1.75 (6H, m), 1.25-1.41 (2H, m). LC/MS R.T.=2.65 min; [M+H]+=346.10; [M+Na]+=368.07; [M−H]−=344.04.

1. customThe reaction was partitioned between 100 mL diethyl ether and 100 mL water
2. dry with materialThe organic layer was dried over sodium sulfate
3. concentrationconcentrated
4. custompurified by flash chromatography on 120 g silica gel with 0 to 30% ethyl acetate in hexane