反应详情

A solution of 6-methyl-6-phenyl-1,3-oxazinan-2-one (500 mg, 2.62 mmol) and NaH (189 mg, 7.86 mmol) in dry THF (10 mL) was stirred for 1 h. A solution of m-bromobenzyl bromide (1.31 g, 5.24 mmol) in dry THF (3 mL) was added. The mixture was stirred overnight at rt. The reaction mixture was quenched water and extracted with EtOAc. The organic layer was washed with brine, dried over Na2SO4, concentrated and purified by preparative TLC to afford 3-(3-bromobenzyl)-6-methyl-6-phenyl-1,3-oxazinan-2-one (300 mg, 32%). 1H NMR (CDCl3): 1.60-1.70 (s, 3H), 2.15-2.30 (m, 1H), 2.35-2.48 (m, 1H), 2.79-2.90 (m, 1H), 3.00-3.10 (m, 1H), 4.30-4.40 (m, 1H), 4.50-4.60 (m, 1H), 6.90-7.00 (m, 1H), 7.00-7.10 (m, 1H), 7.20-7.45 (m, 7H).

1. customThe reaction mixture was quenched water
2. extractionextracted with EtOAc
3. washThe organic layer was washed with brine
4. dry with materialdried over Na2SO4
5. concentrationconcentrated
6. custompurified by preparative TLC