反应详情

A solution of 0.5 g (1.96 mmol) (2-amino-3-hydroxy-phenyl)-(4-isopropyl-phenyl)-methanone, 0.85 ml (9.8 mmol) dibromoethane and 0.67 ml (3.9 mmol) N-ethyl-diisopropylamine in 3 ml dioxane is heated to 100° for 5 d. After extraction with water/dichloromethane the crude product is purified by flash chromatography using a gradient going from hexanes to hexanes/ethyl acetate 7:1 to yield (3,4-dihydro-2.H.-benzo[1,4]oxazin-5-yl)-(4-isopropyl-phenyl)-methanone.

1. extractionAfter extraction with water/dichloromethane the crude product
2. customis purified by flash chromatography