Magnesium → 1-(3-Benzyloxy-5-fluorophenyl)-2-methoxycyclopentanol

Participants

Reaction Steps

After repetition of the above reaction, a solution of 2-methoxycyclopentanone (12.5 g) in tetrahydrofuran (10 ml) was added to a solution of 3-benzyloxy-5-fluorophenylmagnesium bromide [prepared by heating a mixture of 3-benzyloxy-5-fluorobromobenzene (31 g), magnesium powder (2.65 g) and tetrahydrofuran (20 ml) to 40° C. for 2 hours] and the mixture was stirred at ambient temperature for 2 hours. The mixture was evaporated and the residue was partitioned between diethyl ether and rarer, The organic layer was washed with water, dried (MgSO4) and evaporated. The residue was purified by column chromatography using a 9:1 v/v mixture of methylene chloride and diethyl ether as eluent. There was thus obtained, as a mixture of diastereoisomers, 1-(3-benzyloxy-5-fluorophenyl)-2-methoxycyclopentanol (21.7 g, 62%), as an oil.

Provenance & Evidence