反应详情

Part A: To a magnetically stirred solution of valeric acid (10.9 ml, 0.1 mol) in dichloromethane (200 ml) was successively added: N-methyl-N-methoxy-amine.hydrochloride (10.14 gram, 0.104 mol), N-methylmorpholine (22.9 ml, 0.208 mol), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide.HCl (EDCI) (19.92 gram, 0.104 mol) and HOBt (14.04 gram, 0.104 mol) and the resulting mixture was reacted for 20 hours at room temperature. The obtained suspension was successively washed with water, aqueous citric acid (a solution of 24 gram citric acid in 250 ml H2O) and 5% aqueous NaHCO3. The organic layer was dried over Na2SO4, filtered and concentrated to give pentanoic acid methoxy-methyl-amide (12.31 gram, 85% yield) as a colorless oil. 1H-NMR (400 MHz, CDCl3) δ 0.93 (t, J=7, 3H), 1.31-1.43 (m, 2H), 1.57-1.66 (m, 2H), 2.42 (br t, J=7, 2H), 3.18 (s, 3H), 3.69 (s, 3H).

1. washThe obtained suspension was successively washed with water, aqueous citric acid (a solution of 24 gram citric acid in 250 ml H2O) and 5% aqueous NaHCO3
2. dry with materialThe organic layer was dried over Na2SO4
3. filtrationfiltered
4. concentrationconcentrated