triethylamine in dichloromethane; dimethyl sulfoxide T=0 - 20°C; 3.5 h;

1: N-ethylidenecyclohexylamine With lithium diisopropyl amide 2: (2,6-dichlorophenyl)-methyl chloride in tetrahydrofuran T=15 - 20°C; 3: With hydrogenchloride in tetrahydrofuran; water T=0°C;

(i) aq. EtOH, (ii) H2, PtO2, aq. AcOH; Multistep reaction;