o-Fluorobenzaldehyde → 2-(Diethoxymethyl)-alpha-(2-fluorophenyl)-benzenemethanol

Participants

Reaction Conditions

Reaction Steps

A solution of 345 g of 2-bromobenzaldehyde diethyl acetal in 3 l of dry tetrahydofuran was cooled to −40° C. In one portion, 913 ml of a 1.6 M solution of butyllithium in hexane were added under vigorous stirring. The resulting solution was stirred for 0.5 h at −25° C., after which a solution of 140 ml of 2-fluorobenzaldehyde in 350 ml tetrahydrofuran was added drop-wise. In a period of 4 h, the mixture was allowed to reach room temperature. The resulting mixture was pored upon ice-water and extracted several times with ethyl acetate. The organic layers were combined, washed with water, dried over magnesium sulphate and evaporated to dryness under reduced pressure to yield 404 g of 2-(diethoxymethyl)-α-(2-fluorophenyl)-benzenemethanol as an oil, M.S. (C.I.) (M/Z): 305 [M+H]+.

Provenance & Evidence