5-Bromo-1,2,3-trimethoxybenzene → HCID 86589618, compound

Participants

Reaction Conditions

Reaction Steps

A solution 5-bromo-1,2,3-trimethoxy-benzene (276 mg, 1.12 mmol) dissolved in 6 mL anhydrous ether is cooled to −78° C. and tert-butyllithium (1.7 M in pentane, 1.32 mL, 2.24 mmol) is added. The mixture was stirred at −78° C. for 15 minutes, then at room temperature for 3 hours. Aldehyde 241 (100 mg, 0.373 mmol) was added dropwise over 10 minutes in 10 mL ether at −30° C. The mixture was stirred for 0.5 hours and the reaction quenched with dropwise addition of saturated aqueous NH4+Cl−. The phases were separated and the aqueous phase was extracted with ether (4×10 mL). The pooled organic extracts were washed with saturated aqueous NaHCO3, brine, dried (MgSO4), filtered and concentrated under vacuum. The residue was purified by flash chromatography over silica gel (25% ethyl acetate-hexanes) to yield 243(119 mg, 73%).

Provenance & Evidence