p-Toluenesulfonic acid → HCID 19866533, compound

Participants

Reaction Conditions

Reaction Steps

To a suspension of 6.17 g of 50% sodium hydride (washed with hexanes) in 245 ml of dry dimethylformamide was added 19.45 g of benzyl bromide at 0° C. A solution of 56.65 g of 4-(hexadecyloxy)-1-(triphenylmethoxy)-2-butanol in 60 ml of dimethylformamide was added dropwise with stirring at 0° C. under argon. The mixture was stirred overnight at room temperature, then poured into 1000 ml of iced water and extracted with petroleum ether. The organic phase was dried, the solvent removed and the residue dissolved in a mixture of 235 ml of methanol and 125 ml of tetrahydrofuran. A 500 mg portion of p-toluene sulfonic acid was added, the mixture was allowed to stand overnight and then the solvent was removed. The residue was dissolved in petroleum ether, washed with saturated aqueous sodium bicarbonate, dried and the solvent removed giving an oil. This oil was again subjected to treatment with p-toluenesulfonic acid in the solvent system described above, again giving an oil which was purified by HPLC, giving 23 g of the desired compound as an oil.

Provenance & Evidence