Acetic Acid → HCID 19788098, Verbindung

A solution of 50.47 g of p-hydroxythiophenol in 250 ml of tetrahydrofuran was added to a suspension of 38.40 g of sodium hydride (as a 55% w/w dispersion in mineral oil) in 380 ml of dimethylformamide, whilst ice-cooling, and under an atmosphere of nitrogen, and the resulting mixture was stirred for 0.5 hour. At the end of this time, a solution of 54.2 ml of p-methoxybenzyl chloride in 120 ml of tetrahydrofuran was added dropwise to the resulting mixture, which was then stirred for 1 hour. The reaction mixture was then neutralized by adding acetic acid, whilst ice-cooling, after which it was poured into water. The mixture was then extracted with ethyl acetate, and the extract was washed with water and with a saturated aqueous solution of sodium chloride, in that order. The resulting solution was then dried, after which the solvent was removed by distillation under reduced pressure, and the residue was purified by column chromatography through silica gel, using a 1:3 by volume mixture of cyclohexane and tetrahydrofuran as the eluent. The eluted product was recrystallized from a mixture of tetrahydrofuran and hexane, to afford 88.99 g of the title compound.

1. temperaturewhilst ice-cooling
2. stirringwas then stirred for 1 hour
3. temperaturewhilst ice-cooling
4. extractionThe mixture was then extracted with ethyl acetate
5. washthe extract was washed with water and with a saturated aqueous solution of sodium chloride, in that order
6. customThe resulting solution was then dried
7. customafter which the solvent was removed by distillation under reduced pressure
8. customthe residue was purified by column chromatography through silica gel
9. additionby volume mixture of cyclohexane and tetrahydrofuran as the eluent
10. customThe eluted product was recrystallized from a mixture of tetrahydrofuran and hexane

ORD-Eintrag

ord-b48464827c1742fc99358a71fbf2076d

Quelldatensatz

uspto-grants-1993_10

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05254578