反应详情

The product from step (i) (1.3 g) was added to a pre-formed solution of butyllithium (2.5M in hexanes, 2.51 ml), diisopropylamine (0.88 ml) in dry THF (30 ml) at −78° C. The mixture was kept at −78° C. for 1 hour before adding iodomethane (0.4 ml). The mixture was slowly allowed to warm to room temperature overnight. The mixture was diluted with 2M HCl, extracted with ether, dried (MgSO4) and evaporated under reduced pressure to give an oil. The oil was purified by flash column chromatography (eluent 2:1 isohexane/diethylether) (0.8 g).

1. extractionextracted with ether
2. dry with materialdried (MgSO4)
3. customevaporated under reduced pressure
4. customto give an oil
5. customThe oil was purified by flash column chromatography (eluent 2:1 isohexane/diethylether) (0.8 g)