1: ortho-fluorobenzaldehyde With n-butyllithium; di-(2-methoxyethyl)amine in tetrahydrofuran; hexane T=-20°C; 0.75 h; Inert atmosphere; 2: With n-butyllithium in tetrahydrofuran; hexane T=-20 - 0°C; 2.16667 h; Inert atmosphere; 3: N,N-dimethyl-formamide Further stages;

1.1: n-butyllithium / tetrahydrofuran / -78 - -40 °C 1.2: 1 h / -78 °C 2.1: water / acetone / 2.5 h 3.1: hydrazine / ethanol / 2.5 h / 0 - 23 °C View Scheme