N-ethyl-N,N-diisopropylamine in tetrahydrofuran T=-78°C; 5 h;

1.1: Mg / tetrahydrofuran 1.2: tetrahydrofuran / 2 h / 0 °C 1.3: H2O2; NaHCO3 / tetrahydrofuran; methanol / Heating 2.1: 658 mg / diisopropylethylamine / tetrahydrofuran / 5 h / -78 °C View Scheme