反应详情

温度

-5 °C

4-{1-[4-(Tetrahydro-2H-pyran-2-yloxy)phenoxy]-3-butenyl}benzonitrile (from step (i) above; 4.6 g; 13 mmol) was dissolved in dry THF (50 mL) under argon and cooled to −5° C. Borane-methylsulfide complex (BH3xSMe2) (3.5 mL of a 2 M solution in ether) was added dropwise at 0 to 5° C. The mixture was stirred at that temperature for 1.5 h. After 4 h at rt, tlc showed that the reaction was complete. The reaction mixture was quenched with 14 mL of H2O and 5 g of NaBO3. The mixture was stirred overnight, the solvent decanted off, and the residue treated with ether and decanted. The combined organic fractions were washed with brine, dried (Na2SO4), and evaporated. The crude product was purified by chromatography on silica (iso-propanol:ethyl acetate:heptane; 5:20:70). Yield: 2.44 g (58%).

1. waitAfter 4 h at rt
2. customThe reaction mixture was quenched with 14 mL of H2O and 5 g of NaBO3
3. stirringThe mixture was stirred overnight
4. customthe solvent decanted off
5. additionthe residue treated with ether
6. customdecanted
7. washThe combined organic fractions were washed with brine
8. dry with materialdried (Na2SO4)
9. customevaporated
10. customThe crude product was purified by chromatography on silica (iso-propanol:ethyl acetate:heptane; 5:20:70)