反应详情

n-Butyllithium (1.55M in hexane, 194 ml) was added dropwise to a stirred suspension of (3-hydroxypropyl)triphenylphosphonium bromide (60.3 g) in dry THF (375 ml) cooled to 0° under nitrogen. The resulting blood-red solution was stirred at 0° for 15 min and then a solution of 3-methoxy-4-(phenylmethoxy) benzaldehyde (36.3 g) in dry THF (50 ml) added dropwise over 15 min. The mixture was stirred at 0° for 30 min, allowed to warm up to room temperature, stirred for a further 2 h and then the reaction quenched by the addition of 2N hydrochloric acid (100 ml). The THF was removed in vacuo at 40°, the aqueous residue extracted with EA (350 ml) and the organic layer washed with 2N HCl (200 ml). The aqueous phase was extracted with further EA (150 ml), the organic layers combined, washed with 8% sodium bicarbonate solution (200 ml) and dried (MgSO 4). Concentration afforded the crude product which was purified by FCC eluting with EA-CX (1:2) yielding the title compound as a cream powder (14.5 g) m.p. 57°-61° T.l.c. (ER-CX - 1:1) Rf 0.15.

1. temperaturecooled to 0° under nitrogen
2. stirringThe mixture was stirred at 0° for 30 min
3. stirringstirred for a further 2 h
4. customthe reaction quenched by the addition of 2N hydrochloric acid (100 ml)
5. customThe THF was removed in vacuo at 40°
6. extractionthe aqueous residue extracted with EA (350 ml)
7. washthe organic layer washed with 2N HCl (200 ml)
8. extractionThe aqueous phase was extracted with further EA (150 ml)
9. washwashed with 8% sodium bicarbonate solution (200 ml)
10. dry with materialdried (MgSO 4)
11. concentrationConcentration
12. customafforded the crude product which
13. customwas purified by FCC
14. washeluting with EA-CX (1:2)