2-Bromo-5-chlorothiophene-3-carbaldehyde → 2-Bromo-5-chloro-α-(3-chlorophenyl)-3-thiophenemethanol

Participants

Reaction Conditions

Reaction Steps

To a solution of 2-bromo-5-chlorothiophene-3-carbaldehyde from Example 1, Step 3 (2.50 g, 11.1 mmol) in THF/ether at −78° C. was added 3-chlorophenylmagnesium bromide (26.6 mL, 0.5M in THF) in 2 min. and the mixture was stirred at −78° C. for 5 min., quenched with saturated NH4Cl/water and extracted with ethyl acetate. The organic layer was washed with brine, dried over MgSO4 and filtered. The filtrate was concentrated and the residue was purified by flash chromatography (10-20% EtOAc/hexanes) to give the desired product.

Provenance & Evidence