1: 4-methyl-pent-1-yne With ethylmagnesium bromide in tetrahydrofuran T=20°C; 1 h; Inert atmosphere; 2: oxirane in tetrahydrofuran T=20°C; 3: With ammonium chloride in tetrahydrofuran; water

1: 1-isopropyl-2-methylacetylene With methylmagnesium bromide in tetrahydrofuran T=20°C; 1 h; Inert atmosphere; 2: formaldehyd in tetrahydrofuran T=20°C; Inert atmosphere;

1: 1,1-Dibromo-4-methyl-1-pentene With n-butyllithium in tetrahydrofuran; hexane T=-78 - 0°C; Inert atmosphere; 2: With trimethylaluminum in tetrahydrofuran; hexane T=0°C; 0.5 h; Inert atmosphere; 3: oxirane in tetrahydrofuran; hexane T=0 - 20°C; Inert atmosphere;