1: With 2,4,6-trimethyl-pyridine; triethylsilyl trifluoromethanesulphonate in dichloromethane T=0°C; 0.5 h; Inert atmosphere; 2: With water in dichloromethane Inert atmosphere; chemoselective reaction;

n-BuMnMgBr in tetrahydrofuran; N,N,N',N',N'',N''-hexamethylphosphoric triamide T=25°C; Rearrangement; 12 h;

n-BuMnMgBr in tetrahydrofuran; N,N,N',N',N'',N''-hexamethylphosphoric triamide T=25°C; Rearrangement; 12 h;

1: n-butyl-magnesium bromide With N,N,N',N',N'',N''-hexamethylphosphoric triamide; manganese (II) chloride in tetrahydrofuran T=0°C; 0.333333 h; 2: 2-(3-phenyl-allyloxy)-tetrahydro-furan in tetrahydrofuran T=0 - 25°C; 23 h;

in tetrahydrofuran; N,N,N',N',N'',N''-hexamethylphosphoric triamide T=25°C; Ring cleavage; 12 h;