反应详情

A mixture of 6.77 g (13.8 mmol) of 5-[3-amino-5-(octadecyloxy)phenoxy]pentanoic acid methyl ester, 6.6 ml (41.3 mmol) of benzyl bromoacetate, 7.4 g (34.4 mmol) of 1,8-bis(dimethylamino)naphthalene and 0.6 g (3.9 mmol) of sodium iodide in 150 ml of acetonitrile and 50 ml of DMF was stirred at reflux under an argon atmosphere for 48 hours. The reaction mixture was concentrated at reduced pressure to remove the solvents and ethyl acetate was added to the residue. The extract was washed with 0.5N HCl, with NaHCO3 solution, dried and concentrated at reduced pressure to an oil. Purification by HPLC using 20% ethyl acetate-hexane gave 6.55 g (60% yield, mp 48°-50°) of N-[3-(octadecyloxy)-5-[(5-methoxy-5-oxopentyl)oxy]phenyl]-N-[2-oxo-2-(phenylmethoxy)ethyl]glycine phenylmethyl ester.

1. temperatureat reflux under an argon atmosphere for 48 hours
2. concentrationThe reaction mixture was concentrated at reduced pressure
3. customto remove the solvents and ethyl acetate
4. additionwas added to the residue
5. washThe extract was washed with 0.5N HCl, with NaHCO3 solution
6. customdried
7. concentrationconcentrated at reduced pressure to an oil
8. customPurification by HPLC