反应详情

To a solution of 2-benzylamino-1-(4-octyloxy-phenyl)-ethanol (22.50 g; 63.3 mmol) and Et3N (9.7 mL; 69.6 mmol) in CH2Cl2 (500 mL) was added dropwise a solution of chloroacetyl chloride (5.5 mL; 69.6 mmol) in CH2Cl2 (25 mL), at 0° C. After 1 hour at 0° C. the reaction mixture was quenched with 1M aqueous HCl (200 mL). The layers were separated and the organic layer washed with a 5% aqueous NaHCO3 solution, dried (Na2SO4) and concentrated in vacuo. The residue was dissolved in 2-propanol (250 mL) and KOH (4.26 g; 76 mmol) was added. The resulting mixture was stirred at RT for 1 hour and subsequently concentrated in vacuo. The crude product was partitioned between EtOAc and 0.5 M aqueous HCl. The layers were separated and the organic layer was washed with 5% aqueous NaHCO3 solution, dried (Na2SO4) and evaporated in vacuo to afford 4-benzyl-6-(4-octyloxy-phenyl)-morpholin-3-one (22.30 g) which was used as such in the next step.

1. customat 0° C
2. customAfter 1 hour at 0° C. the reaction mixture was quenched with 1M aqueous HCl (200 mL)
3. customThe layers were separated
4. washthe organic layer washed with a 5% aqueous NaHCO3 solution
5. dry with materialdried (Na2SO4)
6. concentrationconcentrated in vacuo
7. dissolutionThe residue was dissolved in 2-propanol (250 mL)
8. concentrationsubsequently concentrated in vacuo
9. customThe crude product was partitioned between EtOAc and 0.5 M aqueous HCl
10. customThe layers were separated
11. washthe organic layer was washed with 5% aqueous NaHCO3 solution
12. dry with materialdried (Na2SO4)
13. customevaporated in vacuo