反应详情

To a solution of 1-[1-(4-bromo-phenyl)-ethylamino]-4-methyl-pentan-3-one (3.42 g, 0.01 mol) and K2CO3 (6.9 g, 0.05 mol) in dried CH2Cl2 (50 mL) was added chloroformate (1.41 g, 0.015 mol). The mixture was refluxed overnight. The solvent was removed to give the crude product, which was purified by column to give [1-(4-bromo-phenyl)-ethyl]-(4-methyl-3-oxo-pentyl)-carbamic acid methyl ester (2.8 g, 79%). 1H NMR (CDCl3): 1.01 (m, 6H), 1.48 (m, 3H), 2.25-2.47 (m, 2H), 2.62 (m, 1H), 3.24 (m, 2H), 5.46 (s, 1H), 7.17 (m, 2H), 7.45 (m, 2H).

1. temperatureThe mixture was refluxed overnight
2. customThe solvent was removed
3. customto give the crude product, which
4. customwas purified by column