Hydrochloric Acid → 4-Bromo-3-methoxycinnamic acid

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a solution of 1-bromo-4-iodo-2-methoxybenzene (L. A. Hasvold et al., US 2004/0254159, EXAMPLE 57B) (33.45 g, 107 mmol) in MeCN (100 mL) was added acrylic acid (9.61 g, 133 mmol), Et3N (37.2 mL, 267 mmol) and palladium acetate (719 mg, 3.2 mmol). The reaction mixture was heated to 90° C. for 40 minutes, cooled to RT and poured into 2.4-L 1 M HCl. After stirring for 30 minutes, the solid was filtered, suspended in EtOH (230 mL) heated to reflux and allowed to cool to RT with stirring overnight. The solid was filtered and washed with 1:1 EtOH hexane (50 mL) to give the title compound. LRMS ESI+ (M+H)+257.0.

Herkunft & Nachweise