反应详情

温度

0 °C

To a solution of cis-(2-methyl-2,3,4,6,7,8-hexahydro-1H-cyclopenta[g]quinolin-4-yl)-carbamic acid benzyl ester (Example 1A) (2.0 g, 4.9 mmol) in anhydrous dichloromethane (50 mL) was added pyridine (1.0 mL). The mixture was cooled to 0° C., and ethyl chloroformate (1.0 mL) was slowly added. The reaction was stirred at 0° C. for 30 min, then at room temperature for 4 h. The reaction mixture was washed twice with 25 mL of 2N HCl. The organic layer was dried over magnesium sulfate, filtered and concentrated in vacuo. Purification by silica gel chromatography using 15% ethyl acetate/hexanes as eluent afforded the title product (500 mg). 1H NMR (CDCl3) δ 1.1 (d, 3H), 1.2 (t, 3H), 4.2 (m, 2H), 5.2 (s, 2H), 7.0 (s, 1H), 7.3 (s, 1H), 7.4 (m, 5H).

1. waitat room temperature for 4 h
2. washThe reaction mixture was washed twice with 25 mL of 2N HCl
3. dry with materialThe organic layer was dried over magnesium sulfate
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customPurification by silica gel chromatography