反应详情

温度

0 °C

A solution of lithium aluminum hydride (1.9 L, 1 M in THF) was cooled to -30° C. and 2'-[2-(1-methyl-1-phenylethyl)-2H-tetrazol-5-yl]biphenyl-4-carboxylic acid methyl ester (0.848 kg, 2.13 mol), prepared as in Example 3, in 3.5 L of THF was added at a rate such that the reaction temperature remained below -10° C. The mixture was allowed to warm to 0° C. and 77 mL of water, 77 mL of 15% sodium hydroxide and 230 mL of water were sequentially added. The mixture was filtered and the filter cake washed with 3×500 mL of THF. The filtrate was concentrated, then 4 L of hexanes were added and a crystalline product was obtained. The product was isolated by filtration and the filter cake was washed with hexanes. Drying gave 2'-[2-(1-methyl-1-phenylethyl)-2H-tetrazol-5-yl]-biphenyl-4-methanol (0.788 kg, 2.12 mol), m.p. 117°-120° C.

1. customremained below -10° C
2. filtrationThe mixture was filtered
3. washthe filter cake washed with 3×500 mL of THF
4. concentrationThe filtrate was concentrated
5. addition4 L of hexanes were added
6. customa crystalline product was obtained
7. customThe product was isolated by filtration
8. washthe filter cake was washed with hexanes
9. customDrying