反应详情

温度

-50 °C

Methyl triphenylphosphine bromide (commercially available from Aldrich) (2.2 g, 6.16, mmol) in THF(60 mL) at −70° C. was treated with nBuLi (2.44 mL, 2.5M in hexane). The reaction mixture warmed to −50° C. in 1 h. A solution of (6-methyl-pyridin-2-yl)-(1-trityl-1H-imidazol-4-yl)-methanone (Intermediate D3) (1.38 g, 3.2 mmol) in THF (25 mL) was added to the mixture via syringe at −50° C. The mixture was allowed to warm to rt for 1.5 h. The mixture was poured into ether (mL) and washed with water (2×10 mL). The organic solution was dried over MgSO4, filtered and evaporated to leave a residue. This was purified by chromatography on SiO2 with diethyl ether to give 2-methyl-6-[1-(1-trityl-1H-imidazol-4-yl)-vinyl]-pyridine (Intermediate D4) 0.68 g (50%).

1. temperatureto warm to rt for 1.5 h
2. washwashed with water (2×10 mL)
3. dry with materialThe organic solution was dried over MgSO4
4. filtrationfiltered
5. customevaporated
6. customto leave a residue
7. customThis was purified by chromatography on SiO2 with diethyl ether