1: With cesium fluoride in N,N-dimethyl-formamide T=20°C; 16 h; 2: With hydrogenchloride; ammonium chloride in diethyl ether; N,N-dimethyl-formamide Further stages.;

1: With methyllithium in tetrahydrofuran; diethyl ether T=0 - 20°C; Wittig rearrangement; 2: With ammonium chloride in tetrahydrofuran Further stages.;