Dichloromethane → HCID 90409751, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of (4S)-9-bromo-7-(3,5-dimethylisoxazol-4-yl)-4-pyridin-2-yl-4,5-dihydroimidazo[1,5,4-de][1,4]benzoxazin-2(1H)-one (3.00 g, 7.02 mmol), 4,4,5,5-tetramethyl-2-vinyl-1,3,2-dioxaborolane (2.14 mL, 12.6 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II), complex with dichloromethane (1:1) (570 mg, 0.70 mmol) and potassium carbonate (2.90 g, 21 mmol) in 1,4-dioxane (40 mL) and water (20 mL) was heated at 80° C. for 1 h. The mixture was then poured over water and extracted with ethyl acetate. The extracts were washed with brine, dried over sodium sulfate, filtered and concentrated. Purification by flash column chromatography (40% ethyl acetate/hexanes to 90% ethyl acetate/hexanes) gave the desired product (1.69 g, 64%) as a single enantiomer. LCMS calculated for C21H19N4O3 (M+H)+: m/z=375.1. found: 375.1.

Provenance & Evidence