反应详情

温度

20 °C

A solution of (5R)-3-(6-{2-[(3-aminobenzyl)oxy]ethoxy}hexyl)-5-(2,2-dimethyl-4H-1,3-benzodioxin-6-yl)-1,3-oxazolidin-2-one (0.209 g) in dichloromethane (4 ml) was treated with cyclohexyl isocyanate (0.075 g) and the mixture stirred under nitrogen at 20° C. for 3 h. At this point further cyclohexyl isocyanate (0.150 g) was added, and the reaction mixture stirred for a further 65 h. Isopropanol (15 ml) was added to quench excess isocyanate, and the mixture stirred for 3 h. The solvents were removed in vacuo to give a residue which was purified by Biotage. Elution with 6:4 EtOAc/cyclohexane followed by solvent evaporation in vacuo gave the title compound (0.212 g). LCMS RT=3.77 min, ES+ve 624 (MH)+.

1. stirringthe reaction mixture stirred for a further 65 h
2. customto quench excess isocyanate
3. stirringthe mixture stirred for 3 h
4. customThe solvents were removed in vacuo
5. customto give a residue which
6. customwas purified by Biotage
7. washElution with 6:4 EtOAc/cyclohexane
8. customfollowed by solvent evaporation in vacuo