4-Hydroxybenzaldehyde → HCID 20135245, compound

Participants

Reaction Steps

p-Hydroxy-benzaldehyde (15 g), ethanol (200 ml) and 50% NaOH (12 g) were mixed with stirring, followed by pouring in the mixture, a tosylate (26 g) derived from S-(+)-2-octanol, heating the resulting mixture under reflux for 6 hours, distilling off most of ethanol, adding 6N-HCl (100 ml), extracting with toluene, washing the toluene layer with acid, washing with alkali, washing with water to make it neutral, drying, concentrating, and further concentrating the resulting concentrate according to column chromatography with Al2O3 (40 g) to obtain oily p-(1-methylheptyloxy)benzaldehyde (13.0 g). Next, sodium boron hydride (1.0 g) was suspended in isopropyl alcohol (50 ml), followed by dropwise adding to the suspension, a solution of p-(1-methylheptyloxy)benzaldehyde obtained above in isopropyl alcohol (100 ml) so that the liquid temperature might not exceed 40° C., stirring the mixture at 60° C. for 4 hours, adding 6N-HCl (30 ml) and water (20 ml), further heating with stirring at 60° C., distilling off the solvent, extracting the residue with toluene, washing the toluene layer with acid, washing with alkali, washing with water to make it neutral, drying and concentrating to obtain raw p-(1-methylheptyloxy)benzyl alcohol (13 g), which was then heated together with thionyl chloride for 6 hours, followed by distilling off excess thionyl chloride under reduced pressure to obtain raw p-(1-methylheptyloxy)benzyl chloride (IIIb-2) (13 g), which was used, as it was, in the following reaction.

Provenance & Evidence