1,4-Dibromobenzene → HCID 70161136, compound

Participants

Reaction Steps

A solution of 10.7 g of 1,4-dibromobenzene in 80 ml of absolute THF is cooled to −78° C. and treated within 30 min. with 25.6 ml of 1.6M butyllithium in hexane. After 30 min. 6.08 g of (4E,8E)-(RS)-4,8-dimethyl-10-(tetrahydro-pyran-2-yloxy)-deca4,8-dienal in 20 ml of THF are added dropwise. After 1 hr. at −78° C. the bath is removed until the suspension has dissolved and subsequently 7.2 ml of acetic acid in 10 ml of ether are added dropwise at −78° C. The solution is poured into saturated ammonium chloride solution/ethyl acetate. The organic phase is washed with saturated sodium bicarbonate solution and 10% sodium chloride solution, dried and evaporated. After silica gel chromatography with hexane/ethyl acetate 95:5 there are obtained 4.3 g of (4E,8E)-1-(4-bromo-phenyl)-4,8-dimethyl-10-(tetrahydro-pyran-2-yloxy)-deca-4,8-dien-1-ol.

Provenance & Evidence