1: 1.) methyl iodide, Mg / 1.) ether, reflux, 5 h; 2.) ether, -15 deg C, 30 min 2: 80 percent / BCl3 / chlorobenzene / 1 h / -15 °C View Scheme

1: 2-allyl-4-bromoanisole With magnesium; ethylene dibromide in diethyl ether 1 h; Reflux; 2: 1-allyl-4-oxocyclohexa-2,5-dienylethanoate in diethyl ether T=0°C; 0.5 h;