1.1: Mg; MeOH / 0.5 h / 20 °C / sonication 2.1: n-BuLi / diethyl ether / 0 - 20 °C 2.2: diethyl ether / 1 h / 20 °C 3.1: AIBN; n-Bu3SnH / toluene / 0.5 h / -10 °C / Irradiation 3.2: 43 mg / aq. H2O2; KF; KHCO3 / tetrahydrofuran; methanol / 20 h / 20 °C View Scheme

trifluoroacetic acid in dichloromethane T=20°C; 12 h;