Sodium Carbonate → HCID 23103382, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 1.56 M hexane (23.7 ml) of n-butyl lithium was added dropwise to a solution of 3-methyl-1-benzothiophene (5.0 g) in tetrahydrofuran (50 ml) at −78° C. under an argon atmosphere, and the mixture was stirred for half an hour at the same temperature. Then, a solution of 3-bromobenzaldehyde (6.05 g) in tetrahydrofuran (6 ml) was added dropwise to the mixture, and the mixture was stirred for half an hour. Water was added to the reaction mixture, and extracted with ethyl acetate. The organic layer was washed with aqueous solution of saturated ammonium chloride and dried over anhydrous magnesium sulfate. After filtration, the solvent was evaporated from the filtrate under reduced pressure to give the residue, and the residue was purified by silica gel column chromatography (n-hexane-ethyl acetate) to obtain (3-bromophenyl)(3-methyl-1-benzothien-2-yl) methanol (10.0 g) as achromatic oily matter. Borontrifluoride diethyl ether complex (4.42 ml) and triethylsilane (9.58 ml) were added to a solution of (3-bromophenyl)(3-methyl-1-benzothien-2-yl) methanol in dichloromethane (100 ml) at −30° C., and the mixture was stirred for half an hours. After the reaction mixture was heated to −10° C. and stirred for 10 minutes, aqueous solution of saturated sodium carbonate was added to the reaction mixture, and extracted with ethyl acetate. The organic layer was washed with saturated saline solution and dried over anhydrous magnesium sulfate. After filtration, the solvent was evaporated from the filtrate under reduced pressure to give the residue, and the residue was purified by silica gel column chromatography (n-hexane-ethyl acetate) to obtain 2-(3-bromobenzyl)-3-methyl-1-benzothiophene (6.68 g).

Provenance & Evidence