1: 2-(triisopropylsiloxy)-3-methyl-furan With silver trifluoroacetate in dichloromethane T=-78°C; 2: allyl bromide in dichloromethane T=-78 - 20°C; 1 h;

1.1: 99 percent / Et3N / CH2Cl2 / 1.5 h / 20 °C 2.1: silver(I) trifluoroacetate / CH2Cl2 / -78 °C 2.2: 58 percent / CH2Cl2 / 1 h / -78 - 20 °C View Scheme