1: thien-2-yl bromide With magnesium in tetrahydrofuran T=40°C; 2 h; 2: benzyl 2,6-dioxotetrahydro-2H-pyran-3-ylcarbamate in tetrahydrofuran T=-78°C; 4 h; 3: With citric acid in tetrahydrofuran T=-78 - 20°C; Title compound not separated from byproducts;
1: 1-bromo-butane With magnesium in tetrahydrofuran T=40°C; 2 h; 2: benzyl 2,6-dioxotetrahydro-2H-pyran-3-ylcarbamate in tetrahydrofuran T=-78°C; 4 h; 3: With citric acid in tetrahydrofuran T=-78 - 20°C; Title compound not separated from byproducts;
1: 3-methoxybromobenzene With magnesium in tetrahydrofuran T=40°C; 2 h; 2: benzyl 2,6-dioxotetrahydro-2H-pyran-3-ylcarbamate in tetrahydrofuran T=-78°C; 4 h; 3: With citric acid in tetrahydrofuran T=-78 - 20°C; Title compound not separated from byproducts;
1: 1-bromo-hexane With magnesium in tetrahydrofuran T=40°C; 2 h; 2: benzyl 2,6-dioxotetrahydro-2H-pyran-3-ylcarbamate in tetrahydrofuran T=-78°C; 4 h; 3: With citric acid in tetrahydrofuran T=-78 - 20°C; Title compound not separated from byproducts;
