Methyl iodide → 7-Bromo-1,4,4-trimethyl-3,1-benzoxazin-2-one

Participants

Reaction Steps

Into the solution of 7-bromo-4,4-dimethyl-1H-benzo[d][1,3]oxazin-2(4H)-one 7.37 (1.35 g) in DMF (20 mL) was added 1M solution of NaHMDS in THF (7 mL) at rt. After 30 min., MeI (0.85 g) was added. After overnight stirring, the reaction mixture was extracted with ethyl acetate and washed with brine, and dried with dry agent. After removal of the solvent, the residue was crystallized from mixture of DCM and Hexane to provide 1.2 g of 7-bromo-1,4,4-trimethyl-1H-benzo[d][1,3]oxazin-2(4H)-one 7.38 was synthesized.

Provenance & Evidence