反应详情

温度

-78 °C

To a stirring solution of bromobenzene (0.45 g, 2.89 mmol) in THF (20 mL) at −78° C. was added n-BuLi (1.16 mL, 2.5 M in hexanes). The mixture was stirred at −78° C. for 1 h and a solution of 5-(2,6-dimethyl-4-triisopropylsilanyloxybenzyl)-2-methoxymethoxybenzaldehyde (example 35; step e, 1.2 g, 2.63 mmol) was added. The reaction mixture was stirred at −78° C. for 1 h, allowed to warm to room temperature and stirred for 1 h. The reaction mixture was quenched with saturated NH4Cl and diluted with diethyl ether. The organic layer was dried over Na2SO4, filtered and concentrated under reduced pressure to afford [5-(2,6-dimethyl-4-triisopropylsilanyloxy-benzyl)-2-methoxymethoxy-phenyl]-phenyl-methanol as an yellow oil (1.4 g, 99.6%): 1H NMR (200 MHz, DMSO-d6): δ 7.23 (m, 6 H), 6.85 (d, J=8.8 Hz, 1 H), 6.68 (m, 1 H), 6.56 (s, 2 H), 5.92 (d, J=4.0 Hz, 1 H), 5.62 (d, J=4.0 Hz, 1 H), 5.10 (q, J=4.0 Hz, 2 H), 3.84 (s, 2 H), 3.23 (s, 3 H), 2.11 (s, 6 H), 1.23 (m, 3 H), 1.06 (d, J=6.4 Hz, 18 H); TLC conditions: Uniplate silica gel, 250 microns; Mobile phase=15% ethyl acetate in hexanes; Rf=0.50.

1. stirringThe reaction mixture was stirred at −78° C. for 1 h
2. temperatureto warm to room temperature
3. stirringstirred for 1 h
4. customThe reaction mixture was quenched with saturated NH4Cl
5. additiondiluted with diethyl ether
6. dry with materialThe organic layer was dried over Na2SO4
7. filtrationfiltered
8. concentrationconcentrated under reduced pressure