4-Methoxybenzaldehyde → HCID 20225016, compound

Participants

Reaction Steps

A solution of p-anisaldehyde (6.43 g) and 1-[1-(4-chlorophenyl)cyclobutyl]ethylamine (see Example 1(b) of published British Patent Specification No. 2098602) in the form of its free base (9.09 g) in dry toluene (50 ml) was heated under reflux for 20 hours under nitrogen and water was removed by means of a Dean-Stark apparatus. The reaction mixture was cooled and solid sodium borohydride (4.1 g) was added. Methanol (40 ml) was added dropwise at a temperature of 25°-30° C. The mixture was heated under reflux for one hour and the methanol and toluene removed by evaporation. The residue was cooled to ambient temperature and excess 5N hydrochloric acid added. The mixture was then basified with aqueous sodium hydroxide solution and extracted with ether. The ether extract was washed and shaken with 5N hydrochloric acid to give a white solid which was recrystallised from ethanol to give N-(4-methoxybenzyl)-1-[1-(4-chlorophenyl)cyclobutyl]ethylamine hydrochloride (m.p. 225°-228° C.).

Provenance & Evidence