6-amino-3,4-dihydro-2H-1,4-benzoxazin-3-one → HCID 67331922, compound

Participants

Reaction Steps

A mixture of (R)-tert-butyl-dimethyl-(3-oxiranyl-propoxy)-silane (13 g, 60 mmol; prepared according to Org. Lett. (2005), 7, 3997) and 6-amino-4H-benzo[1,4]oxazin-3-one (9.9 g) in EtOH/H2O (9:1, 325 mL) was heated at reflux overnight. The volatiles were removed under reduced pressure and the residue purified by CC (Hept/EA 1:1) to give the desired intermediate as a brown oil (8.9 g, 39% yield).

Provenance & Evidence